spring-210728-04---JdbcTemplate操作数据库-批量添加&修改&删除

spring-210728-04—JdbcTemplate操作数据库-批量添加&修改&删除

• 演示
• UserDao.java（dao层接口）
• UserDaoImpl.java（这里实现DML操作）
• UserService.java（这里调用dao）
• TestUser01.java（测试）
• bean01.xml（Spring配置文件）
• User.java（实体类）

---

演示

UserDao03.java（dao层接口）

package com.bgy.spring.dao;

import java.util.List;

public interface UserDao03 {

    // 批量添加
    void batchAddUser(List<Object[]> batchArgs);

    // 批量修改
    void batchUpdateUser(List<Object[]> batchArgs);

    // 批量删除
    void batchDeleteUser(List<Object[]> batchArgs);
}

---

UserDaoImpl03.java（这里实现DML操作）

package com.bgy.spring.dao;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class UserDaoImpl03 {

    // 注入UserDao03
    @Autowired
    private UserDao03 userDao03;


    /**
     * 批量添加
     */
    public void batchAdd(List<Object[]> batchArgs){
        userDao03.batchAddUser(batchArgs);
    }

    /**
     * 批量修改
     */
    public void batchUpdate(List<Object[]> batchArgs){
        userDao03.batchUpdateUser(batchArgs);
    }

    /**
     * 批量删除
     */
    public void batchDelete(List<Object[]> batchArgs){
        userDao03.batchDeleteUser(batchArgs);
    }
}

---

UserService03.java（这里调用dao）

package com.bgy.spring.service;

import com.bgy.spring.dao.UserDao03;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

import java.util.Arrays;
import java.util.List;

@Repository
public class UserService03 implements UserDao03 {

    // 注入jdbctemplate
    @Autowired
    private JdbcTemplate jdbcTemplate;


    /*
        这个方法可以实现DML操作
        batchUpdate(String sql , List<Object[]> batchArgs)
            第一个参数：sql语句
            第二个参数：List集合，就表示添加多条记录的数据

       这个方法它会自动循环遍历集合，将每一个集合中元素交给sql参数执行。
     */

    /**
     * 批量添加
     * @param batchArgs
     */
    @Override
    public void batchAddUser(List<Object[]> batchArgs) {
        String sql = "insert into t_user values(?,?,?)";

        // 这个数组表示影响行数
        int[] ints = jdbcTemplate.batchUpdate(sql, batchArgs);
        System.out.println(Arrays.toString(ints));
    }

    /**
     * 批量修改
     * @param batchArgs
     */
    @Override
    public void batchUpdateUser(List<Object[]> batchArgs) {
        String sql = "update t_user set username=?,ustatus=? where user_id=?";

        int[] ints = jdbcTemplate.batchUpdate(sql, batchArgs);
        System.out.println(Arrays.toString(ints));
    }

    /**
     * 批量删除
     * @param batchArgs
     */
    @Override
    public void batchDeleteUser(List<Object[]> batchArgs) {
        String sql = "delete from t_user where user_id=?";

        int[] ints = jdbcTemplate.batchUpdate(sql, batchArgs);
        System.out.println(Arrays.toString(ints));
    }
}

---

TestUser03.java（测试）

import com.bgy.spring.service.UserService03;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.ArrayList;
import java.util.List;

public class TestUser03 {

    /**
     * 测试批量添加
     */
    @Test
    public void test01(){
        ApplicationContext context = new ClassPathXmlApplicationContext("bean01.xml");

        UserService03 userService03 = context.getBean("userService03", UserService03.class);

        List<Object[]> batchArgs = new ArrayList<>();
        Object[] o1 = {"1111","裴擒虎","打野"};
        Object[] o2 = {"2222","西施","中路"};
        Object[] o3 = {"3333","狂铁","对抗路"};
        batchArgs.add(o1);
        batchArgs.add(o2);
        batchArgs.add(o3);

        userService03.batchAddUser(batchArgs);
    }

    /**
     * 测试批量修改
     */
    @Test
    public void test02(){
        ApplicationContext context = new ClassPathXmlApplicationContext("bean01.xml");

        UserService03 userService03 = context.getBean("userService03", UserService03.class);

        List<Object[]> batchArgs = new ArrayList<>();
        Object[] o1 = {"裴擒虎","打野3-0","1111"};
        Object[] o2 = {"西施","中路1-1","2222"};
        Object[] o3 = {"狂铁","对抗路2-1","3333"};
        batchArgs.add(o1);
        batchArgs.add(o2);
        batchArgs.add(o3);

        userService03.batchUpdateUser(batchArgs);
    }

    /**
     * 测试批量删除
     */
    @Test
    public void test03(){
        ApplicationContext context = new ClassPathXmlApplicationContext("bean01.xml");

        UserService03 userService03 = context.getBean("userService03", UserService03.class);

        List<Object[]> batchArgs = new ArrayList<>();
        Object[] o1 = {"1111"};
        Object[] o2 = {"2222"};
        Object[] o3 = {"3333"};
        batchArgs.add(o1);
        batchArgs.add(o2);
        batchArgs.add(o3);

        userService03.batchDeleteUser(batchArgs);
    }
}

---

bean01.xml（Spring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"
       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/context http://www.springframework.org/schema/context/spring-context.xsd
                           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">


    <!-- 开启组件扫描 -->
    <context:component-scan base-package="com.bgy.spring"></context:component-scan>

    <!-- 数据库连接池 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
          destroy-method="close">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/spring_test_210728_01?serverTimezone=UTC&amp;useSSL=false" />
        <property name="username" value="root" />
        <property name="password" value="admin" />
    </bean>

    <!-- 创建JdbcTemplate对象 -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">

        <!-- 注入DataSource -->
        <property name="dataSource" ref="dataSource"></property>

    </bean>
</beans>

---

User.java（实体类）

package com.bgy.spring.entity;

public class User {
    private String userId;
    private String username;
    private String ustatus;

    public String getUserId() {
        return userId;
    }
    public void setUserId(String userId) {
        this.userId = userId;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getUstatus() {
        return ustatus;
    }
    public void setUstatus(String ustatus) {
        this.ustatus = ustatus;
    }
    
    @Override
    public String toString() {
        return "User{" +
                "userId='" + userId + '\'' +
                ", username='" + username + '\'' +
                ", ustatus='" + ustatus + '\'' +
                '}';
    }
}