1.pom.xml导入依赖
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.19</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.26</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.18</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
</dependencies>
<!--可以解决静态资源无法导入问题-->
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
</resources>
</build>
1.1上面的build配置可以解决静态资源无法导入问题
2.实体类 User
根据数据库写实体类
package com.peng.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.接口 UserMapper
import com.peng.pojo.User;
import java.util.List;
public interface UserMapper {
public List<User> selectUser();
public int addUser(User user);
public int deleteUSer(int id);
public int updateUser(User user);
}
4.SQL实现文件 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.peng.mapper.UserMapper">
<select id="selectUser" resultType="user">
select *from mybatis.user
</select>
<insert id="addUser" parameterType="user" >
insert into mybatis.user(id, name, pwd) value (#{id},#{name},#{pwd})
</insert>
<delete id="deleteUSer" parameterType="int" >
delete from mybatis.user where id=#{id}
</delete>
<update id="updateUser" parameterType="user" >
update mybatis.user set name=#{name},pwd=#{pwd} where id=#{id}
</update>
</mapper>
5.mybatis-config.xml mybatis基础文件，只留下基础配置例如别名…
<?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.peng.pojo"/>
</typeAliases>
<!--别名设置留下-->
</configuration>
6.spring-mybatis.xml 通过Spring方式配置sqlSessionFactory
<?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:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--数据源配置-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306?mybatis&serverTimezone=UTC&characterEncoding=utf8&useUnicode=true"/>
<property name="username" value="root"/>
<property name="password" value="1234"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!--绑定mybatis配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<!--绑定xml文件-->
<property name="mapperLocations" value="classpath:com/peng/mapper/*.xml"/>
</bean>
<!--SqlSessionTemplate就是sqlSession-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<!--只能通过构造器注入sqlSessionFactory因为他没有set方法-->
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
</beans>
7.注入实现类 UserMapperImpl
package com.peng.mapper;
import com.peng.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;
import java.util.List;
public class UserMapperImpl implements UserMapper{
private SqlSessionTemplate sqlSession;
public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
@Override
public List<User> selectUser() {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
return mapper.selectUser();
}
@Override
public int addUser(User user) {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
return mapper.addUser(user);
}
@Override
public int deleteUSer(int id) {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
return mapper.deleteUSer(id);
}
@Override
public int updateUser(User user) {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
return mapper.updateUser(user);
}
}
8.applicationContext.xml 导入spring的sqlSessionFactory配置只负责注入实现类
<?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:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<import resource="spring-mybatis.xml"/>
<bean id="userMapper" class="com.peng.mapper.UserMapperImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean>
</beans>
9.测试类
import com.peng.mapper.UserMapper;
import com.peng.pojo.User;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.List;
public class MyTest {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper = context.getBean("userMapper", UserMapper.class);
int i = userMapper.addUser(new User(2, "pengge", "123456"));
if (i>0){
System.out.println("增加成功");
}
int i1 = userMapper.updateUser(new User(1, "龙仔", "111111"));
if (i1>0){
System.out.println("修改成功");
}
int i2 = userMapper.deleteUSer(7);
if (i2>0){
System.out.println("删除成功");
}
List<User> users = userMapper.selectUser();
for (User user : users) {
System.out.println(user);
}
}
}
结果：
