如何详细实现Spring框架与MyBatis的集成实例？

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在环境配置中，首先创建Maven的quickstart项目；接着，构建DAO层、Service层、Controller层、PO层、Mapper以及资源文件（db.properties、log4j.properties、mybatis.xml、spring.xml）。以下是简化后的步骤：

1. 创建Maven项目

2.建立DAO层、Service层、Controller层、PO层

3.添加Mapper和资源文件配置

4.配置pom.xml，修改JDK版本

5.添加依赖

环境配置

1>先创建maven的quickstart项目;并且创建dao层,service层,controller层,po层,mapper,resources以及下面的配置文件(db.properties,log4j.properties,mybatis.xml,spring.xml).

2>配置pom.xml

​ 修改jdk版本;

​ 添加依赖:

​ junit版本改为4.12;spring-context;spring-test;spring-jdbc;spring-tx(事务);aspectjweaver(切面编程);c3p0(连接池);mybatis;mybatis-spring;mysql-connector-java(mysql驱动包);slf4j-log4j12,slf4j-api(日志打印);

​ 设置资源目录和插件

<build> <!-- Maven 项目:如果源代码(src/main/java)存在xml、properties、tld 等文件 Maven 默认不会自动编译该文件到输出目录,如果要编译源代码中xml properties tld 等文件 需要显式配置 resources 标签 --> <resources> <resource> <directory>src/main/resources</directory> </resource> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> <include>**/*.properties</include> <include>**/*.tld</include> </includes> <filtering>false</filtering> </resource> </resources> </build>

3>配置spring.xml

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="www.springframework.org/schema/beans" xmlns:xsi="www.w3.org/2001/XMLSchema-instance" xmlns:context="www.springframework.org/schema/context" xmlns:aop="www.springframework.org/schema/aop" xmlns:tx="www.springframework.org/schema/tx" xsi:schemaLocation="www.springframework.org/schema/beans www.springframework.org/schema/beans/spring-beans.xsd www.springframework.org/schema/context www.springframework.org/schema/context/spring-context.xsd www.springframework.org/schema/aop www.springframework.org/schema/aop/spring-aop.xsd www.springframework.org/schema/tx www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 扫描基本包 --> <context:component-scan base-package="com.xxxx" /> <!-- 加载properties 配置文件 --> <context:property-placeholder location="classpath:db.properties" /> <!-- aop --> <aop:aspectj-autoproxy /> <!-- 配置c3p0 数据源 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driver}"></property> <property name="jdbcUrl" value="${jdbc.url}"></property> <property name="user" value="${jdbc.username}"></property> <property name="password" value="${jdbc.password}"></property> </bean> <!-- 配置事务管理器 --> <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 设置事物增强 --> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="add*" propagation="REQUIRED" /> <tx:method name="insert*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="delete*" propagation="REQUIRED" /> </tx:attributes> </tx:advice> <!-- aop 切面配置 --> <aop:config> <aop:pointcut id="servicePointcut" expression="execution(* com.xxxx.service..*.*(..))" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="servicePointcut" /> </aop:config> <!-- 配置 sqlSessionFactory --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <property name="configLocation" value="classpath:mybatis.xml" /> <property name="mapperLocations" value="classpath:com/xxxx/mapper/*.xml" /> </bean> <!-- 配置扫描器 --> <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 扫描com.xxxx.dao这个包以及它的子包下的所有映射接口类 --> <property name="basePackage" value="com.xxxx.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> </bean> </beans>

4>配置 mybatis.xml

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!-- 定义类别名 --> <typeAliases> <package name="com.xxxx.po"/> </typeAliases> </configuration>

5>配置 db.properties

jdbc.url中?前面的spring_mybatis是数据库名字,注意要修改下

password是密码,也是要修改下的

6>添加日志

jdbc.driver=com.mysql.cj.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/spring_mybatis? useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false jdbc.username=root jdbc.password=root

log4j.properties

log4j.rootLogger=DEBUG, Console # Console log4j.appender.Console=org.apache.log4j.ConsoleAppender log4j.appender.Console.layout=org.apache.log4j.PatternLayout log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n log4j.logger.java.sql.ResultSet=INFO log4j.logger.org.apache=INFO log4j.logger.java.sql.Connection=DEBUG log4j.logger.java.sql.Statement=DEBUG log4j.logger.java.sql.PreparedStatement=DEBUG

添加源代码

1>在po 包下创建 JavaBean 文件 User.java

public class User { private Integer userId; private String userName; private String userPwd; private String userEmail; private Date createDate; private Date updateDate; /** set get toString 方法省略 **/ }

2>在dao层添加UserDao接口

public interface UserDao { User queryUserByUserId(Integer userId); }

3>在mapper包添加UserMapper.xml 映射文件

sql代码写在这地方

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.xxxx.dao.UserDao"> <select id="queryUserByUserId" parameterType="int" resultType="com.xxxx.po.User"> select user_id as userId,user_name as userName,user_pwd as userPwd from tb_user where user_id = #{userId} </select> </mapper>

4>添加 UserService.java

@Service public class UserService { @Autowired private UserDao userDao; public User queryUserByUserId(Integer userId){ return userDao.queryUserByUserId(userId); } }

5>添加 UserController.java

@Controller public class UserController { // 注入userService @Resource private UserService userService; /** * 通过用户ID查询用户对象 * @param userId * @return */ public User queryUserByUserId(Integer userId) { User user = userService.queryUserByUserId(userId); return user; } }

执行测试

public class App { public static void main(String[] args) { // 加载Spring的配置 BeanFactory factory = new ClassPathXmlApplicationContext("spring.xml"); // 得到UserController对象 UserController userController = (UserController) factory.getBean("userController"); // 调用方法 User user = userController.queryUserByUserId(1); System.out.println(user.toString()); } }

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