【Mybatis学习总结九】Spring中集成Mybatis
2016-09-29 18:01
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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:
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
【注】此处id内的方法要与SUserMapper.jaav接口内的方法名一致;
@ContextConfiguration("/beans.xml")//加载配置
@Autowired //注入
private SUserMapper sUserMapper;接口
结构
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(); } @Override public 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mybatis namespace: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_user set user_name = #{name}, user_birthday = #{birthday}, user_salary = #{salary} where user_id = #{id} </update> <delete id="delete"> 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>
【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.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="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; @Test public void save(){ SUser user = new SUser(-1,"tom",new Date(),12345); sUserMapper.save(user); } @Test public void delete(){ sUserMapper.delete(4); } @Test public void update(){ SUser user = new SUser(2,"tom33",new Date(),99999); sUserMapper.update(user); } @Test public void getUser(){ SUser user = sUserMapper.findById(1); System.out.println(user); } @Test public void findAll(){ List<SUser> users = sUserMapper.findAll(); System.out.println(users); } }
结构
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