spring 整合mybatis
阿新 • • 發佈：2020-07-19
過程
1、匯入jar包
junit
mybatis
mysql
spring
aop
mybatis-spring
2、編寫配置檔案
3、測試
二、過程
1、maven
<!-- 依賴--> <dependencies> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> </dependency> <!-- <dependency>--> <!-- <groupId>log4j</groupId>--> <!-- <artifactId>log4j</artifactId>--> <!-- <version>1.2.17</version>--> <!-- </dependency>--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.10</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.10</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.0.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.2.0.RELEASE</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.5</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.10</version> <scope>provided</scope> </dependency> </dependencies> <build> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> </resource> </resources> </build>
2、pojo實體類
package com.wt.pojo; public class User { private int id; private String name; private String pwd; public User() { } public User(int id, String name, String pwd) { this.id = id; this.name = name; this.pwd = pwd; } 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 String getPwd() { return pwd; } public void setPwd(String pwd) { this.pwd = pwd; } @Override public String toString() { return "User{" + "id=" + id + ", name='" + name + '\'' + ", pwd='" + pwd + '\'' + '}'; } }
3、mapper介面
package com.wt.mapper; import com.wt.pojo.User; import java.util.List; public interface UserMapper { List<User> getUserList(); }
4、mapper xml對映檔案
<?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.wt.mapper.UserMapper"> <select id="getUserList" resultType="com.wt.pojo.User"> select * from User </select> </mapper>
5、mapper介面實現類
package com.wt.mapper; import com.wt.pojo.User; import org.mybatis.spring.SqlSessionTemplate; import java.util.List; public class UserMapperImpl implements UserMapper { // 內容除了繼承的方法，其它的固定不變 private SqlSessionTemplate sqlSessionTemplate; public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) { this.sqlSessionTemplate = sqlSessionTemplate; } public List<User> getUserList() { UserMapper userMapper = sqlSessionTemplate.getMapper(UserMapper.class); return userMapper.getUserList(); } }
6、mybatis-config.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> <typeAliases> <package name="com.wt.pojo"/> </typeAliases> </configuration>
7、spring子配置檔案
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd"> <!--Spring 代替mybatis 連線資料庫--> <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?characterEncoding=UTF8"/> <property name="username" value="root"/> <property name="password" value="@WSX3edc"/> </bean> <!--sqlSessionFactory--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!--繫結配置檔案--> <property name="configLocation" value="classpath:mybatis-config.xml"/> <property name="mapperLocations" value="classpath:com/wt/mapper/UserMapper.xml"/> </bean> <!--sqlSessionTemplate--> <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate"> <constructor-arg index="0" ref="sqlSessionFactory"/> </bean> <!--注意上面的3個bean格式固定不變，只需改資料庫的連線資訊--> <!--注入userMapper的實現類--> <!-- <bean id="userMapper" class="com.wt.mapper.UserMapperImpl">--> <!-- <property name="sqlSessionTemplate" ref="sqlSessionTemplate"/>--> <!-- </bean>--> </beans>
8、spring總配置檔案
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd"> <import resource="classpath:spring-dao.xml"/> <!--注意上面的3個bean格式固定不變，只需改資料庫的連線資訊--> <!--注入userMapper的實現類--> <bean id="userMapper" class="com.wt.mapper.UserMapperImpl"> <property name="sqlSessionTemplate" ref="sqlSessionTemplate"/> </bean> </beans>
9、測試類
package com.wt.mapper; import com.wt.pojo.User; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import java.util.List; public class TestMapper { @Test public void getUser(){ ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); UserMapper userMapper = context.getBean("userMapper", UserMapper.class); List<User> userList = userMapper.getUserList(); for (User user : userList) { System.out.println(user); } } }