【Mybatis学习总结九】Spring中集成Mybatis

学习了Mybatis的基本内容后，现在最重要的内容莫过于是在Spring中集成Mybatis了。好处之一就是不用再单独配置Mybatis-config.xml文件了(含有数据库连接池和配置类名以及注册映射文件等信息)。下面看具体操作步骤：

1 填加jar包：

【mybatis 】
mybatis-3.2.0.jar
mybatis-spring-1.1.1.jar
log4j-1.2.17.jar
【spring 】
spring-aop-3.2.0.RELEASE.jar
spring-beans-3.2.0.RELEASE.jar
spring-context-3.2.0.RELEASE.jar
spring-core-3.2.0.RELEASE.jar
spring-expression-3.2.0.RELEASE.jar
spring-jdbc-3.2.0.RELEASE.jar
spring-test-3.2.4.RELEASE.jar
spring-tx-3.2.0.RELEASE.jar
aopalliance-1.0.jar
cglib-nodep-2.2.3.jar
commons-logging-1.1.1.jar
【MYSQL 驱动包】
mysql-connector-java-5.0.4-bin.jar

2 创建数据表：

CREATE TABLE s_user(user_id INT AUTO_INCREMENT PRIMARY KEY,user_name VARCHAR(30),user_birthday DATE,user_salary DOUBLE)

3 创建实体类：SUser.java

package com.spring_mybatis.domain;import java.util.Date;public class SUser {private int id;private String name;private Date birthday;private double salary;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}public double getSalary() {return salary;}public void setSalary(double salary) {this.salary = salary;}public SUser(int id, String name, Date birthday, double salary) {super();this.id = id;this.name = name;this.birthday = birthday;this.salary = salary;}public SUser() {super();}@Overridepublic String toString() {return "SUser [id=" + id + ", name=" + name + ", salary=" + salary+ "]";}}

4 创建接口SUserMapper

package com.mybatis.Mapper;import java.util.List;import com.spring_mybatis.domain.SUser;public interface SUserMapper {void save(SUser user);void update(SUser user);void delete(int id);SUser findById(int id);List<SUser> findAll();}

5 对应的SQL映射文件suserMapper.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"><!-- 9  spring集成mybatisnamespace:必须与SUserMapper.java接口的报名一致；id:       必须与接口中定义的方法一致； --><!--定义操作 SUser 表的sql 映射文件：suserMapper.xml   --><mapper namespace="com.mybatis.Mapper.SUserMapper"><!-- 解决别名与实体类属性名冲突问题 --><resultMap type="SUser" id="userResult"><result column="user_id" property="id"/><result column="user_name" property="name"/><result column="user_birthday" property="birthday"/><result column="user_salary" property="salary"/></resultMap><!-- 取得插入数据后的id --><insert id="save" keyColumn="user_id" keyProperty="id" useGeneratedKeys="true">insert into s_user(user_name,user_birthday,user_salary)values(#{name},#{birthday},#{salary})</insert><update id="update">update s_userset user_name = #{name},user_birthday = #{birthday},user_salary = #{salary}where user_id = #{id}</update><delete id="delete">delete from s_userwhere user_id = #{id}</delete><select id="findById" resultMap="userResult">select *from s_userwhere user_id = #{id}</select><select id="findAll" resultMap="userResult">select * from s_user</select></mapper>

【注】此处id内的方法要与SUserMapper.jaav接口内的方法名一致；

6 spring的配置文件：beans.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd"><!-- 1. 数据源 : DriverManagerDataSource --><bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"><property name="driverClassName" value="com.mysql.jdbc.Driver"/><property name="url" value="jdbc:mysql://localhost:3306/mybatis"/><property name="username" value="root"/><property name="password" value="920614"/></bean><!-- 2. mybatis的SqlSession的工厂: SqlSessionFactoryBean dataSource / typeAliasesPackage--><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="datasource"/><property name="typeAliasesPackage" value="com.spring_mybatis.domain"/></bean><!-- 3. mybatis自动扫描加载Sql映射文件 : MapperScannerConfigurer sqlSessionFactory / basePackage--><bean id="config" class="org.mybatis.spring.mapper.MapperScannerConfigurer"><property name="basePackage" value="com.mybatis.Mapper"/><property name="sqlSessionFactory" ref="sqlSessionFactory"/></bean><!-- 4. 事务管理 : DataSourceTransactionManager --><bean id="manager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="datasource"/></bean><!-- 5. 使用声明式事务 --><tx:annotation-driven transaction-manager="manager" /></beans>

7 测试类：

【注】测试的时候@RunWith(SpringJUnit4ClassRunner.class)//使用Springtest框架

@ContextConfiguration("/beans.xml")//加载配置

@Autowired  //注入
private SUserMapper sUserMapper;接口

package com.mybatis.test;import java.util.Date;import java.util.List;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import com.mybatis.Mapper.SUserMapper;import com.spring_mybatis.domain.SUser;@RunWith(SpringJUnit4ClassRunner.class)//使用Springtest框架@ContextConfiguration("/beans.xml")//加载配置public class Test9 {/** * 测试Spring集成Mybatis */@Autowired  //注入private SUserMapper sUserMapper;@Testpublic void save(){SUser user = new SUser(-1,"tom",new Date(),12345);sUserMapper.save(user);}@Testpublic void delete(){sUserMapper.delete(4);}@Testpublic void update(){SUser user = new SUser(2,"tom33",new Date(),99999);sUserMapper.update(user);}@Testpublic void getUser(){SUser user = sUserMapper.findById(1);System.out.println(user);}@Testpublic void findAll(){List<SUser> users = sUserMapper.findAll();System.out.println(users);}}

结构