SpringMVC+Mybatis整合
Homxu Homxu
控制层采用springmvc、持久层使用mybatis实现。 首先参考Spring与Mybatis整合
所需依赖包
配置数据库和逆向工程
数据库表: 
使用逆向工程生成pojo和dao: 
这里可能和上一篇文章中User类和Items类的代码不同，需要进行修改
配置文件
applicationContext.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:db.properties"/>
<!-- 配置数据库连接池 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="maxActive" value="10" />
<property name="maxIdle" value="5" />
</bean>
<!-- 配置SqlSessionFactory -->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 配置数据源 -->
<property name="dataSource" ref="dataSource" />
<!-- 配置mybatis核心配置文件 -->
<property name="configLocation" value="classpath:sqlmapConfig.xml"/>
</bean>
<!-- Mapper动态代理开发 扫描包 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 配置基本包 -->
<property name="basePackage" value="my.study.springmvc.mapper"/>
</bean>
</beans>
db.properties:
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/springmvc
jdbc.username=root
jdbc.password=12345
log4j.properties:
# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
sqlmapConfit.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 设置别名 -->
<typeAliases>
<!-- 指定扫描包，会把保内所有的类都设置别名，
别名的名就是类名，大小写不敏感
-->
<package name="my.study.springmvc.mapper"/>
</typeAliases>
</configuration>
在web.xml中配置监听器，去读取配置：
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- Spring监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
配置至此，如果开启tomcat,那么就可以连接数据库了
配置事务
在applicationContext.xml中配置注解事务,并开启注解:
<!-- 配置事务 -->
<bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 开启注解 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
从mysql中读取信息并显示
书写service层代码: 
ItemService.java:
package my.study.springmvc.service;
import java.util.List;
import my.study.springmvc.pojo.Items;
public interface ItemService {
public List<Items> selectItemsList();
}
ItemServiceImpl.java:
package my.study.springmvc.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import my.study.springmvc.dao.ItemsMapper;
import my.study.springmvc.pojo.Items;
/**
* 查询商品信息
* @author homxu
*
*/
@Service
public class ItemServiceImpl implements ItemService {
@Autowired
private ItemsMapper itemsmapper;
public List<Items> selectItemsList(){
return itemsmapper.selectByExample(null);
}
}
将service代码注入到controller：
package my.study.springmvc.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import my.study.springmvc.pojo.Items;
import my.study.springmvc.service.ItemService;
@Controller
public class ItemController {
@Autowired
private ItemService itemservice;
@RequestMapping(value = "/item/itemlist.action")
public ModelAndView itemList(){
//从mysql中查询
List<Items> items = itemservice.selectItemsList();
ModelAndView mav = new ModelAndView();
mav.addObject("itemList",items);
mav.setViewName("itemList");
return mav;
}
}
其中@Autowired 注释，它可以对类成员变量、方法及构造函数进行标注，完成自动装配的工作。 通过 @Autowired的使用来消除 set ，get方法。关于此注释：https://www.cnblogs.com/caoyc/p/5626365.html
附录
sql
/*
Navicat MySQL Data Transfer
Source Server : localhost_3306
Source Server Version : 50611
Source Host : localhost:3306
Source Database : springmvc
Target Server Type : MYSQL
Target Server Version : 50611
File Encoding : 65001
Date: 2016-05-09 19:45:13
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for items
-- ----------------------------
DROP TABLE IF EXISTS `items`;
CREATE TABLE `items` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(32) NOT NULL COMMENT '商品名称',
`price` float(10,1) NOT NULL COMMENT '商品定价',
`detail` text COMMENT '商品描述',
`pic` varchar(64) DEFAULT NULL COMMENT '商品图片',
`createtime` datetime NOT NULL COMMENT '生产日期',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of items
-- ----------------------------
INSERT INTO `items` VALUES ('1', '台式机', '13000.0', '该电脑质量非常好！！！！', null, '2016-02-03 13:22:53');
INSERT INTO `items` VALUES ('2', '笔记本', '16000.0', '笔记本性能好，质量好！！！！！', null, '2015-02-09 13:22:57');
INSERT INTO `items` VALUES ('3', '背包', '200.0', '名牌背包，容量大质量好！！！！', null, '2015-02-06 13:23:02');
-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(32) NOT NULL COMMENT '用户名称',
`birthday` date DEFAULT NULL COMMENT '生日',
`sex` char(1) DEFAULT NULL COMMENT '性别',
`address` varchar(256) DEFAULT NULL COMMENT '地址',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=27 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('1', '王五', null, '2', null);
INSERT INTO `user` VALUES ('10', '张三', '2014-07-10', '1', '北京市');
INSERT INTO `user` VALUES ('16', '张小明', null, '1', '河南郑州');
INSERT INTO `user` VALUES ('22', '陈小明', null, '1', '河南郑州');
INSERT INTO `user` VALUES ('24', '张三丰', null, '1', '河南郑州');
INSERT INTO `user` VALUES ('25', '陈小明', null, '1', '河南郑州');
INSERT INTO `user` VALUES ('26', '王五', null, null, null);
dao
逆向工程生成的dao： ItemsMapper.java:
package my.study.springmvc.dao;
import my.study.springmvc.pojo.Items;
import my.study.springmvc.pojo.ItemsExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;
public interface ItemsMapper {
int countByExample(ItemsExample example);
int deleteByExample(ItemsExample example);
int deleteByPrimaryKey(Integer id);
int insert(Items record);
int insertSelective(Items record);
List<Items> selectByExampleWithBLOBs(ItemsExample example);
List<Items> selectByExample(ItemsExample example);
Items selectByPrimaryKey(Integer id);
int updateByExampleSelective(@Param("record") Items record, @Param("example") ItemsExample example);
int updateByExampleWithBLOBs(@Param("record") Items record, @Param("example") ItemsExample example);
int updateByExample(@Param("record") Items record, @Param("example") ItemsExample example);
int updateByPrimaryKeySelective(Items record);
int updateByPrimaryKeyWithBLOBs(Items record);
int updateByPrimaryKey(Items record);
}
UserMapper.java:
package my.study.springmvc.dao;
import my.study.springmvc.pojo.User;
import my.study.springmvc.pojo.UserExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;
public interface UserMapper {
int countByExample(UserExample example);
int deleteByExample(UserExample example);
int deleteByPrimaryKey(Integer id);
int insert(User record);
int insertSelective(User record);
List<User> selectByExample(UserExample example);
User selectByPrimaryKey(Integer id);
int updateByExampleSelective(@Param("record") User record, @Param("example") UserExample example);
int updateByExample(@Param("record") User record, @Param("example") UserExample example);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
}
ItemsMapper.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="my.study.springmvc.dao.ItemsMapper" >
<resultMap id="BaseResultMap" type="my.study.springmvc.pojo.Items" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="name" property="name" jdbcType="VARCHAR" />
<result column="price" property="price" jdbcType="REAL" />
<result column="pic" property="pic" jdbcType="VARCHAR" />
<result column="createtime" property="createtime" jdbcType="TIMESTAMP" />
</resultMap>
<resultMap id="ResultMapWithBLOBs" type="my.study.springmvc.pojo.Items" extends="BaseResultMap" >
<result column="detail" property="detail" jdbcType="LONGVARCHAR" />
</resultMap>
<sql id="Example_Where_Clause" >
<where >
<foreach collection="oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Update_By_Example_Where_Clause" >
<where >
<foreach collection="example.oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Base_Column_List" >
id, name, price, pic, createtime
</sql>
<sql id="Blob_Column_List" >
detail
</sql>
<select id="selectByExampleWithBLOBs" resultMap="ResultMapWithBLOBs" parameterType="my.study.springmvc.pojo.ItemsExample" >
select
<if test="distinct" >
distinct
</if>
<include refid="Base_Column_List" />
,
<include refid="Blob_Column_List" />
from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null" >
order by ${orderByClause}
</if>
</select>
<select id="selectByExample" resultMap="BaseResultMap" parameterType="my.study.springmvc.pojo.ItemsExample" >
select
<if test="distinct" >
distinct
</if>
<include refid="Base_Column_List" />
from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null" >
order by ${orderByClause}
</if>
</select>
<select id="selectByPrimaryKey" resultMap="ResultMapWithBLOBs" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
,
<include refid="Blob_Column_List" />
from items
where id = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from items
where id = #{id,jdbcType=INTEGER}
</delete>
<delete id="deleteByExample" parameterType="my.study.springmvc.pojo.ItemsExample" >
delete from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</delete>
<insert id="insert" parameterType="my.study.springmvc.pojo.Items" >
insert into items (id, name, price,
pic, createtime, detail
)
values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{price,jdbcType=REAL},
#{pic,jdbcType=VARCHAR}, #{createtime,jdbcType=TIMESTAMP}, #{detail,jdbcType=LONGVARCHAR}
)
</insert>
<insert id="insertSelective" parameterType="my.study.springmvc.pojo.Items" >
insert into items
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
id,
</if>
<if test="name != null" >
name,
</if>
<if test="price != null" >
price,
</if>
<if test="pic != null" >
pic,
</if>
<if test="createtime != null" >
createtime,
</if>
<if test="detail != null" >
detail,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="name != null" >
#{name,jdbcType=VARCHAR},
</if>
<if test="price != null" >
#{price,jdbcType=REAL},
</if>
<if test="pic != null" >
#{pic,jdbcType=VARCHAR},
</if>
<if test="createtime != null" >
#{createtime,jdbcType=TIMESTAMP},
</if>
<if test="detail != null" >
#{detail,jdbcType=LONGVARCHAR},
</if>
</trim>
</insert>
<select id="countByExample" parameterType="my.study.springmvc.pojo.ItemsExample" resultType="java.lang.Integer" >
select count(*) from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</select>
<update id="updateByExampleSelective" parameterType="map" >
update items
<set >
<if test="record.id != null" >
id = #{record.id,jdbcType=INTEGER},
</if>
<if test="record.name != null" >
name = #{record.name,jdbcType=VARCHAR},
</if>
<if test="record.price != null" >
price = #{record.price,jdbcType=REAL},
</if>
<if test="record.pic != null" >
pic = #{record.pic,jdbcType=VARCHAR},
</if>
<if test="record.createtime != null" >
createtime = #{record.createtime,jdbcType=TIMESTAMP},
</if>
<if test="record.detail != null" >
detail = #{record.detail,jdbcType=LONGVARCHAR},
</if>
</set>
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExampleWithBLOBs" parameterType="map" >
update items
set id = #{record.id,jdbcType=INTEGER},
name = #{record.name,jdbcType=VARCHAR},
price = #{record.price,jdbcType=REAL},
pic = #{record.pic,jdbcType=VARCHAR},
createtime = #{record.createtime,jdbcType=TIMESTAMP},
detail = #{record.detail,jdbcType=LONGVARCHAR}
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExample" parameterType="map" >
update items
set id = #{record.id,jdbcType=INTEGER},
name = #{record.name,jdbcType=VARCHAR},
price = #{record.price,jdbcType=REAL},
pic = #{record.pic,jdbcType=VARCHAR},
createtime = #{record.createtime,jdbcType=TIMESTAMP}
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByPrimaryKeySelective" parameterType="my.study.springmvc.pojo.Items" >
update items
<set >
<if test="name != null" >
name = #{name,jdbcType=VARCHAR},
</if>
<if test="price != null" >
price = #{price,jdbcType=REAL},
</if>
<if test="pic != null" >
pic = #{pic,jdbcType=VARCHAR},
</if>
<if test="createtime != null" >
createtime = #{createtime,jdbcType=TIMESTAMP},
</if>
<if test="detail != null" >
detail = #{detail,jdbcType=LONGVARCHAR},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKeyWithBLOBs" parameterType="my.study.springmvc.pojo.Items" >
update items
set name = #{name,jdbcType=VARCHAR},
price = #{price,jdbcType=REAL},
pic = #{pic,jdbcType=VARCHAR},
createtime = #{createtime,jdbcType=TIMESTAMP},
detail = #{detail,jdbcType=LONGVARCHAR}
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="my.study.springmvc.pojo.Items" >
update items
set name = #{name,jdbcType=VARCHAR},
price = #{price,jdbcType=REAL},
pic = #{pic,jdbcType=VARCHAR},
createtime = #{createtime,jdbcType=TIMESTAMP}
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>
UserMapper.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="my.study.springmvc.dao.UserMapper" >
<resultMap id="BaseResultMap" type="my.study.springmvc.pojo.User" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="username" property="username" jdbcType="VARCHAR" />
<result column="birthday" property="birthday" jdbcType="DATE" />
<result column="sex" property="sex" jdbcType="CHAR" />
<result column="address" property="address" jdbcType="VARCHAR" />
</resultMap>
<sql id="Example_Where_Clause" >
<where >
<foreach collection="oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Update_By_Example_Where_Clause" >
<where >
<foreach collection="example.oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Base_Column_List" >
id, username, birthday, sex, address
</sql>
<select id="selectByExample" resultMap="BaseResultMap" parameterType="my.study.springmvc.pojo.UserExample" >
select
<if test="distinct" >
distinct
</if>
<include refid="Base_Column_List" />
from user
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null" >
order by ${orderByClause}
</if>
</select>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from user
where id = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from user
where id = #{id,jdbcType=INTEGER}
</delete>
<delete id="deleteByExample" parameterType="my.study.springmvc.pojo.UserExample" >
delete from user
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</delete>
<insert id="insert" parameterType="my.study.springmvc.pojo.User" >
insert into user (id, username, birthday,
sex, address)
values (#{id,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{birthday,jdbcType=DATE},
#{sex,jdbcType=CHAR}, #{address,jdbcType=VARCHAR})
</insert>
<insert id="insertSelective" parameterType="my.study.springmvc.pojo.User" >
insert into user
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
id,
</if>
<if test="username != null" >
username,
</if>
<if test="birthday != null" >
birthday,
</if>
<if test="sex != null" >
sex,
</if>
<if test="address != null" >
address,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="username != null" >
#{username,jdbcType=VARCHAR},
</if>
<if test="birthday != null" >
#{birthday,jdbcType=DATE},
</if>
<if test="sex != null" >
#{sex,jdbcType=CHAR},
</if>
<if test="address != null" >
#{address,jdbcType=VARCHAR},
</if>
</trim>
</insert>
<select id="countByExample" parameterType="my.study.springmvc.pojo.UserExample" resultType="java.lang.Integer" >
select count(*) from user
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</select>
<update id="updateByExampleSelective" parameterType="map" >
update user
<set >
<if test="record.id != null" >
id = #{record.id,jdbcType=INTEGER},
</if>
<if test="record.username != null" >
username = #{record.username,jdbcType=VARCHAR},
</if>
<if test="record.birthday != null" >
birthday = #{record.birthday,jdbcType=DATE},
</if>
<if test="record.sex != null" >
sex = #{record.sex,jdbcType=CHAR},
</if>
<if test="record.address != null" >
address = #{record.address,jdbcType=VARCHAR},
</if>
</set>
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExample" parameterType="map" >
update user
set id = #{record.id,jdbcType=INTEGER},
username = #{record.username,jdbcType=VARCHAR},
birthday = #{record.birthday,jdbcType=DATE},
sex = #{record.sex,jdbcType=CHAR},
address = #{record.address,jdbcType=VARCHAR}
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByPrimaryKeySelective" parameterType="my.study.springmvc.pojo.User" >
update user
<set >
<if test="username != null" >
username = #{username,jdbcType=VARCHAR},
</if>
<if test="birthday != null" >
birthday = #{birthday,jdbcType=DATE},
</if>
<if test="sex != null" >
sex = #{sex,jdbcType=CHAR},
</if>
<if test="address != null" >
address = #{address,jdbcType=VARCHAR},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="my.study.springmvc.pojo.User" >
update user
set username = #{username,jdbcType=VARCHAR},
birthday = #{birthday,jdbcType=DATE},
sex = #{sex,jdbcType=CHAR},
address = #{address,jdbcType=VARCHAR}
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>
控制层采用springmvc、持久层使用mybatis实现。 首先参考Spring与Mybatis整合
所需依赖包
配置数据库和逆向工程
数据库表: 使用逆向工程生成pojo和dao: 这里可能和上一篇文章中User类和Items类的代码不同，需要进行修改
配置文件
applicationContext.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:db.properties"/>
<!-- 配置数据库连接池 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="maxActive" value="10" />
<property name="maxIdle" value="5" />
</bean>
<!-- 配置SqlSessionFactory -->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 配置数据源 -->
<property name="dataSource" ref="dataSource" />
<!-- 配置mybatis核心配置文件 -->
<property name="configLocation" value="classpath:sqlmapConfig.xml"/>
</bean>
<!-- Mapper动态代理开发 扫描包 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 配置基本包 -->
<property name="basePackage" value="my.study.springmvc.mapper"/>
</bean>
</beans>
db.properties:
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/springmvc
jdbc.username=root
jdbc.password=12345
log4j.properties:
# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
sqlmapConfit.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 设置别名 -->
<typeAliases>
<!-- 指定扫描包，会把保内所有的类都设置别名，
别名的名就是类名，大小写不敏感
-->
<package name="my.study.springmvc.mapper"/>
</typeAliases>
</configuration>
在web.xml中配置监听器，去读取配置：
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- Spring监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
配置至此，如果开启tomcat,那么就可以连接数据库了
配置事务
在applicationContext.xml中配置注解事务,并开启注解:
<!-- 配置事务 -->
<bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 开启注解 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
从mysql中读取信息并显示
书写service层代码: ItemService.java:
package my.study.springmvc.service;
import java.util.List;
import my.study.springmvc.pojo.Items;
public interface ItemService {
public List<Items> selectItemsList();
}
ItemServiceImpl.java:
package my.study.springmvc.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import my.study.springmvc.dao.ItemsMapper;
import my.study.springmvc.pojo.Items;
/**
* 查询商品信息
* @author homxu
*
*/
@Service
public class ItemServiceImpl implements ItemService {
@Autowired
private ItemsMapper itemsmapper;
public List<Items> selectItemsList(){
return itemsmapper.selectByExample(null);
}
}
将service代码注入到controller：
package my.study.springmvc.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import my.study.springmvc.pojo.Items;
import my.study.springmvc.service.ItemService;
@Controller
public class ItemController {
@Autowired
private ItemService itemservice;
@RequestMapping(value = "/item/itemlist.action")
public ModelAndView itemList(){
//从mysql中查询
List<Items> items = itemservice.selectItemsList();
ModelAndView mav = new ModelAndView();
mav.addObject("itemList",items);
mav.setViewName("itemList");
return mav;
}
}
其中@Autowired 注释，它可以对类成员变量、方法及构造函数进行标注，完成自动装配的工作。 通过 @Autowired的使用来消除 set ，get方法。关于此注释：https://www.cnblogs.com/caoyc/p/5626365.html
附录
sql
/*
Navicat MySQL Data Transfer
Source Server : localhost_3306
Source Server Version : 50611
Source Host : localhost:3306
Source Database : springmvc
Target Server Type : MYSQL
Target Server Version : 50611
File Encoding : 65001
Date: 2016-05-09 19:45:13
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for items
-- ----------------------------
DROP TABLE IF EXISTS `items`;
CREATE TABLE `items` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(32) NOT NULL COMMENT '商品名称',
`price` float(10,1) NOT NULL COMMENT '商品定价',
`detail` text COMMENT '商品描述',
`pic` varchar(64) DEFAULT NULL COMMENT '商品图片',
`createtime` datetime NOT NULL COMMENT '生产日期',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of items
-- ----------------------------
INSERT INTO `items` VALUES ('1', '台式机', '13000.0', '该电脑质量非常好！！！！', null, '2016-02-03 13:22:53');
INSERT INTO `items` VALUES ('2', '笔记本', '16000.0', '笔记本性能好，质量好！！！！！', null, '2015-02-09 13:22:57');
INSERT INTO `items` VALUES ('3', '背包', '200.0', '名牌背包，容量大质量好！！！！', null, '2015-02-06 13:23:02');
-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(32) NOT NULL COMMENT '用户名称',
`birthday` date DEFAULT NULL COMMENT '生日',
`sex` char(1) DEFAULT NULL COMMENT '性别',
`address` varchar(256) DEFAULT NULL COMMENT '地址',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=27 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('1', '王五', null, '2', null);
INSERT INTO `user` VALUES ('10', '张三', '2014-07-10', '1', '北京市');
INSERT INTO `user` VALUES ('16', '张小明', null, '1', '河南郑州');
INSERT INTO `user` VALUES ('22', '陈小明', null, '1', '河南郑州');
INSERT INTO `user` VALUES ('24', '张三丰', null, '1', '河南郑州');
INSERT INTO `user` VALUES ('25', '陈小明', null, '1', '河南郑州');
INSERT INTO `user` VALUES ('26', '王五', null, null, null);
dao
逆向工程生成的dao： ItemsMapper.java:
package my.study.springmvc.dao;
import my.study.springmvc.pojo.Items;
import my.study.springmvc.pojo.ItemsExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;
public interface ItemsMapper {
int countByExample(ItemsExample example);
int deleteByExample(ItemsExample example);
int deleteByPrimaryKey(Integer id);
int insert(Items record);
int insertSelective(Items record);
List<Items> selectByExampleWithBLOBs(ItemsExample example);
List<Items> selectByExample(ItemsExample example);
Items selectByPrimaryKey(Integer id);
int updateByExampleSelective(@Param("record") Items record, @Param("example") ItemsExample example);
int updateByExampleWithBLOBs(@Param("record") Items record, @Param("example") ItemsExample example);
int updateByExample(@Param("record") Items record, @Param("example") ItemsExample example);
int updateByPrimaryKeySelective(Items record);
int updateByPrimaryKeyWithBLOBs(Items record);
int updateByPrimaryKey(Items record);
}
UserMapper.java:
package my.study.springmvc.dao;
import my.study.springmvc.pojo.User;
import my.study.springmvc.pojo.UserExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;
public interface UserMapper {
int countByExample(UserExample example);
int deleteByExample(UserExample example);
int deleteByPrimaryKey(Integer id);
int insert(User record);
int insertSelective(User record);
List<User> selectByExample(UserExample example);
User selectByPrimaryKey(Integer id);
int updateByExampleSelective(@Param("record") User record, @Param("example") UserExample example);
int updateByExample(@Param("record") User record, @Param("example") UserExample example);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
}
ItemsMapper.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="my.study.springmvc.dao.ItemsMapper" >
<resultMap id="BaseResultMap" type="my.study.springmvc.pojo.Items" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="name" property="name" jdbcType="VARCHAR" />
<result column="price" property="price" jdbcType="REAL" />
<result column="pic" property="pic" jdbcType="VARCHAR" />
<result column="createtime" property="createtime" jdbcType="TIMESTAMP" />
</resultMap>
<resultMap id="ResultMapWithBLOBs" type="my.study.springmvc.pojo.Items" extends="BaseResultMap" >
<result column="detail" property="detail" jdbcType="LONGVARCHAR" />
</resultMap>
<sql id="Example_Where_Clause" >
<where >
<foreach collection="oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Update_By_Example_Where_Clause" >
<where >
<foreach collection="example.oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Base_Column_List" >
id, name, price, pic, createtime
</sql>
<sql id="Blob_Column_List" >
detail
</sql>
<select id="selectByExampleWithBLOBs" resultMap="ResultMapWithBLOBs" parameterType="my.study.springmvc.pojo.ItemsExample" >
select
<if test="distinct" >
distinct
</if>
<include refid="Base_Column_List" />
,
<include refid="Blob_Column_List" />
from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null" >
order by ${orderByClause}
</if>
</select>
<select id="selectByExample" resultMap="BaseResultMap" parameterType="my.study.springmvc.pojo.ItemsExample" >
select
<if test="distinct" >
distinct
</if>
<include refid="Base_Column_List" />
from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null" >
order by ${orderByClause}
</if>
</select>
<select id="selectByPrimaryKey" resultMap="ResultMapWithBLOBs" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
,
<include refid="Blob_Column_List" />
from items
where id = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from items
where id = #{id,jdbcType=INTEGER}
</delete>
<delete id="deleteByExample" parameterType="my.study.springmvc.pojo.ItemsExample" >
delete from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</delete>
<insert id="insert" parameterType="my.study.springmvc.pojo.Items" >
insert into items (id, name, price,
pic, createtime, detail
)
values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{price,jdbcType=REAL},
#{pic,jdbcType=VARCHAR}, #{createtime,jdbcType=TIMESTAMP}, #{detail,jdbcType=LONGVARCHAR}
)
</insert>
<insert id="insertSelective" parameterType="my.study.springmvc.pojo.Items" >
insert into items
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
id,
</if>
<if test="name != null" >
name,
</if>
<if test="price != null" >
price,
</if>
<if test="pic != null" >
pic,
</if>
<if test="createtime != null" >
createtime,
</if>
<if test="detail != null" >
detail,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="name != null" >
#{name,jdbcType=VARCHAR},
</if>
<if test="price != null" >
#{price,jdbcType=REAL},
</if>
<if test="pic != null" >
#{pic,jdbcType=VARCHAR},
</if>
<if test="createtime != null" >
#{createtime,jdbcType=TIMESTAMP},
</if>
<if test="detail != null" >
#{detail,jdbcType=LONGVARCHAR},
</if>
</trim>
</insert>
<select id="countByExample" parameterType="my.study.springmvc.pojo.ItemsExample" resultType="java.lang.Integer" >
select count(*) from items
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</select>
<update id="updateByExampleSelective" parameterType="map" >
update items
<set >
<if test="record.id != null" >
id = #{record.id,jdbcType=INTEGER},
</if>
<if test="record.name != null" >
name = #{record.name,jdbcType=VARCHAR},
</if>
<if test="record.price != null" >
price = #{record.price,jdbcType=REAL},
</if>
<if test="record.pic != null" >
pic = #{record.pic,jdbcType=VARCHAR},
</if>
<if test="record.createtime != null" >
createtime = #{record.createtime,jdbcType=TIMESTAMP},
</if>
<if test="record.detail != null" >
detail = #{record.detail,jdbcType=LONGVARCHAR},
</if>
</set>
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExampleWithBLOBs" parameterType="map" >
update items
set id = #{record.id,jdbcType=INTEGER},
name = #{record.name,jdbcType=VARCHAR},
price = #{record.price,jdbcType=REAL},
pic = #{record.pic,jdbcType=VARCHAR},
createtime = #{record.createtime,jdbcType=TIMESTAMP},
detail = #{record.detail,jdbcType=LONGVARCHAR}
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExample" parameterType="map" >
update items
set id = #{record.id,jdbcType=INTEGER},
name = #{record.name,jdbcType=VARCHAR},
price = #{record.price,jdbcType=REAL},
pic = #{record.pic,jdbcType=VARCHAR},
createtime = #{record.createtime,jdbcType=TIMESTAMP}
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByPrimaryKeySelective" parameterType="my.study.springmvc.pojo.Items" >
update items
<set >
<if test="name != null" >
name = #{name,jdbcType=VARCHAR},
</if>
<if test="price != null" >
price = #{price,jdbcType=REAL},
</if>
<if test="pic != null" >
pic = #{pic,jdbcType=VARCHAR},
</if>
<if test="createtime != null" >
createtime = #{createtime,jdbcType=TIMESTAMP},
</if>
<if test="detail != null" >
detail = #{detail,jdbcType=LONGVARCHAR},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKeyWithBLOBs" parameterType="my.study.springmvc.pojo.Items" >
update items
set name = #{name,jdbcType=VARCHAR},
price = #{price,jdbcType=REAL},
pic = #{pic,jdbcType=VARCHAR},
createtime = #{createtime,jdbcType=TIMESTAMP},
detail = #{detail,jdbcType=LONGVARCHAR}
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="my.study.springmvc.pojo.Items" >
update items
set name = #{name,jdbcType=VARCHAR},
price = #{price,jdbcType=REAL},
pic = #{pic,jdbcType=VARCHAR},
createtime = #{createtime,jdbcType=TIMESTAMP}
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>
UserMapper.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="my.study.springmvc.dao.UserMapper" >
<resultMap id="BaseResultMap" type="my.study.springmvc.pojo.User" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="username" property="username" jdbcType="VARCHAR" />
<result column="birthday" property="birthday" jdbcType="DATE" />
<result column="sex" property="sex" jdbcType="CHAR" />
<result column="address" property="address" jdbcType="VARCHAR" />
</resultMap>
<sql id="Example_Where_Clause" >
<where >
<foreach collection="oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Update_By_Example_Where_Clause" >
<where >
<foreach collection="example.oredCriteria" item="criteria" separator="or" >
<if test="criteria.valid" >
<trim prefix="(" suffix=")" prefixOverrides="and" >
<foreach collection="criteria.criteria" item="criterion" >
<choose >
<when test="criterion.noValue" >
and ${criterion.condition}
</when>
<when test="criterion.singleValue" >
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue" >
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue" >
and ${criterion.condition}
<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Base_Column_List" >
id, username, birthday, sex, address
</sql>
<select id="selectByExample" resultMap="BaseResultMap" parameterType="my.study.springmvc.pojo.UserExample" >
select
<if test="distinct" >
distinct
</if>
<include refid="Base_Column_List" />
from user
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null" >
order by ${orderByClause}
</if>
</select>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from user
where id = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from user
where id = #{id,jdbcType=INTEGER}
</delete>
<delete id="deleteByExample" parameterType="my.study.springmvc.pojo.UserExample" >
delete from user
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</delete>
<insert id="insert" parameterType="my.study.springmvc.pojo.User" >
insert into user (id, username, birthday,
sex, address)
values (#{id,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{birthday,jdbcType=DATE},
#{sex,jdbcType=CHAR}, #{address,jdbcType=VARCHAR})
</insert>
<insert id="insertSelective" parameterType="my.study.springmvc.pojo.User" >
insert into user
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
id,
</if>
<if test="username != null" >
username,
</if>
<if test="birthday != null" >
birthday,
</if>
<if test="sex != null" >
sex,
</if>
<if test="address != null" >
address,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="username != null" >
#{username,jdbcType=VARCHAR},
</if>
<if test="birthday != null" >
#{birthday,jdbcType=DATE},
</if>
<if test="sex != null" >
#{sex,jdbcType=CHAR},
</if>
<if test="address != null" >
#{address,jdbcType=VARCHAR},
</if>
</trim>
</insert>
<select id="countByExample" parameterType="my.study.springmvc.pojo.UserExample" resultType="java.lang.Integer" >
select count(*) from user
<if test="_parameter != null" >
<include refid="Example_Where_Clause" />
</if>
</select>
<update id="updateByExampleSelective" parameterType="map" >
update user
<set >
<if test="record.id != null" >
id = #{record.id,jdbcType=INTEGER},
</if>
<if test="record.username != null" >
username = #{record.username,jdbcType=VARCHAR},
</if>
<if test="record.birthday != null" >
birthday = #{record.birthday,jdbcType=DATE},
</if>
<if test="record.sex != null" >
sex = #{record.sex,jdbcType=CHAR},
</if>
<if test="record.address != null" >
address = #{record.address,jdbcType=VARCHAR},
</if>
</set>
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExample" parameterType="map" >
update user
set id = #{record.id,jdbcType=INTEGER},
username = #{record.username,jdbcType=VARCHAR},
birthday = #{record.birthday,jdbcType=DATE},
sex = #{record.sex,jdbcType=CHAR},
address = #{record.address,jdbcType=VARCHAR}
<if test="_parameter != null" >
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByPrimaryKeySelective" parameterType="my.study.springmvc.pojo.User" >
update user
<set >
<if test="username != null" >
username = #{username,jdbcType=VARCHAR},
</if>
<if test="birthday != null" >
birthday = #{birthday,jdbcType=DATE},
</if>
<if test="sex != null" >
sex = #{sex,jdbcType=CHAR},
</if>
<if test="address != null" >
address = #{address,jdbcType=VARCHAR},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="my.study.springmvc.pojo.User" >
update user
set username = #{username,jdbcType=VARCHAR},
birthday = #{birthday,jdbcType=DATE},
sex = #{sex,jdbcType=CHAR},
address = #{address,jdbcType=VARCHAR}
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>