java数据库访问（四）—Mybatis

mvnrepository.com/artifact/org.mybatis/mybatis-spring --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.3</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency>

3、配置文件

<?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:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
     http://www.springframework.org/schema/context
     http://www.springframework.org/schema/context/spring-context-2.5.xsd  
     http://www.springframework.org/schema/beans
     https://www.springframework.org/schema/beans/spring-beans.xsd">
     <bean id="dataSource"
     class="org.apache.commons.dbcp2.BasicDataSource"
     destroy-method="close">
     <property name="url" value="jdbc:mysql://localhost:3306/test"/>
     <property name="username" value="root"/>
     <property name="password" value="root"/>
     <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
     </bean>
     <bean id="sqlSessionFactory"
     class="org.mybatis.spring.SqlSessionFactoryBean">
      <property name="dataSource" ref="dataSource"/>
      <property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"/>
     </bean>
     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
      <property name="basePackage" value="com.test.database.mybatis"/>
      <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
     </bean>
</beans>

4、sql映射文件

<?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.test.database.mybatis.TestDao">
<select id="getAll" resultType="com.test.database.User">
select * from user
</select>
</mapper>

5、接口定义

package com.test.database.mybatis;

import java.util.List;

import com.test.database.User;

public interface TestDao {
    
    public List<User> getAll();

}

User定义

package com.test.database;

public class User {
    
    private int id;
    private String name;
    private String password;
    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 getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", password=" + password + "]";
    }
    
    

}

6、测试类

package com.test;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.test.database.mybatis.TestDao;

public class Main {

    public static void main(String[] args) throws BeansException, Exception {
        ApplicationContext context = new ClassPathXmlApplicationContext("spring-context*.xml");
        //测试mybatis
        System.out.println(context.getBean(TestDao.class).getAll());
    }
}

 

7、测试结果

[User [id=1, name=tim, password=tim], User [id=2, name=park, password=park]]

java数据库访问（四）—Mybatis

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