[学习小结]Mybaits与Spring的集成

添加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

建表和添加数据

<span style="font-size:12px;">CREATE TABLE s_user(
user_id INT AUTO_INCREMENT PRIMARY KEY,
user_name VARCHAR(30),
user_birthday DATE,
user_salary DOUBLE
)</span>

定义实体类

<span style="font-size:12px;">import java.util.Date;

public class User {

private int id;
private String name;
private Date birthday;
private double salary;

public User(int id, String name, Date birthday, double salary) {
super();
this.id = id;
this.name = name;
this.birthday = birthday;
this.salary = salary;
}

public User() {
super();
}

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;
}

@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", birthday=" + birthday
+ ", salary=" + salary + "]";
}

}</span>

定于DAO接口

这次与之前的不同，这次是定义接口与SQL映射文件对应，效果一样

<span style="font-size:12px;">import java.util.List;

import com.atguigu.ms.bean.User;
/*
* 约定
*/

public interface UserMapper {

void save(User user);

void update(User user);

void delete(int id);

User findById(int id);

List<User> findAll();

}</span>

定义SQL映射文件：userMapping.xml(与DAO接口忽略大小写同名)

<span style="font-size:12px;"><?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">
<!--namespace必须是接口的全类名  -->
<mapper namespace="com.atguigu.ms.mapper.UserMapper">

<resultMap type="User" 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" parameterType="User">
insert into s_user(user_name,user_birthday,user_salary)
values(#{name},#{birthday},#{salary})
</insert>

<update id="update" parameterType="User">
update s_user
set user_name = #{name},
user_birthday = #{birthday},
user_salary = #{salary}
where user_id = #{id}
</update>

<delete id="delete" parameterType="int">
delete from s_user
where user_id = #{id}
</delete>

<select id="findById" resultMap="userResult">
select *
from s_user
where user_id = #{id}
</select>

<select id="findAll" resultMap="userResult">
select *
from s_user
</select>
</mapper></span>

spring的配置文件: beans.xml

<span style="font-size:12px;"><?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://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="12345"/>
</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.atguigu.ms.bean"/>
</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.atguigu.ms.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></span>

测试

<span style="font-size:12px;">import java.util.Date;

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.atguigu.ms.bean.User;
import com.atguigu.ms.mapper.UserMapper;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("/beans.xml") //加载配置
public class SMTest {

@Autowired
private UserMapper mapper;

@Test
public void testAdd() {
User user = new User(-1, "tom", new Date(), 1234);
mapper.save(user);

int id = user.getId();
System.out.println(id);
}

}</span>