Mybatis中Mapper代理形式开发与spring整合 _mybatis

归志宁无五亩园，读书本意在元元。这篇文章主要讲述Mybatis中Mapper代理形式开发与spring整合相关的知识，希望能为你提供帮助。
1.导入jar包

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【Mybatis中Mapper代理形式开发与spring整合】2.分包

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cogfig:存放配置文件
mapper:存放映射与接口
pojo:存放实体类
test:测试代码

3.编写配置文件

SqlMapConfig.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> < !-- 配置别名 --> < typeAliases> < package name="com.pojo"/> < /typeAliases> < /configuration>

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

db.properties

jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/mybatis01?characterEncoding=utf-8 jdbc.username=root jdbc.password=toor

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"> < /beans>

4.编写实体类、接口、映射

User.java

public class User implements Serializable {private static final long serialVersionUID = 1L; private Integer id; private String username; // 用户姓名 private String sex; // 性别 private Date birthday; // 生日 private String address; // 地址set/get..............................}

UserMapper.java

public interface UserMapper {/** * 通过ID查User * @return */ public User findUserById(Integer id); }

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="com.mapper.UserMapper"> < !-- 通过ID查User --> < select id="findUserById" parameterType="Int" resultType="User"> select * from user where id = #{id} < /select> < /mapper>

5.编写applicationContext.xml

配置数据库连接池

< !-- 加载配置文件 --> < context:property-placeholder location="classpath:com/config/db.properties"/> < !-- 数据库连接池 --> < bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> < property name="driverClassName" value="https://www.songbingjia.com/android/${jdbc.driver}" /> < property name="url" value="https://www.songbingjia.com/android/${jdbc.url}" /> < property name="username" value="https://www.songbingjia.com/android/${jdbc.username}" /> < property name="password" value="https://www.songbingjia.com/android/${jdbc.password}" /> < property name="maxActive" value="https://www.songbingjia.com/android/10" /> < property name="maxIdle" value="https://www.songbingjia.com/android/5" /> < /bean>

管理mybatis工厂

< !-- 管理mybatis工厂 --> < bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> < property name="dataSource" ref="dataSource"/> < property name="configLocation" value="https://www.songbingjia.com/android/classpath:com/config/SqlMapConfig.xml"/> < /bean>

配置mapper代理对象

< !--Mapper代理的方式配置方式一，配置mapper代理对象 --> < bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean"> < property name="mapperInterface" value="https://www.songbingjia.com/android/com.mapper.UserMapper"/> < property name="sqlSessionFactory" ref="sqlSessionFactory"/> < /bean>

6.测试

public class Demo1 {@Test public void m01(){ //加载配置文件 ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath:com/config/applicationContext.xml"); //获取mapper UserMapper mapper = (UserMapper) context.getBean("userMapper"); //执行SQL User user = mapper.findUserById(10); System.out.println(user); }}

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Mapper代理的配置方式二（推荐推荐推荐）

第一种配置方式过于繁琐，有多少个mapper就需要配置多少次

< !-- Mapper动态代理配置扫描 --> < bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> < !-- 基本包 --> < property name="basePackage" value="https://www.songbingjia.com/android/com.mapper"/> < /bean>

修改获取bean的方式