目录结构

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.javaboy.jdbc</groupId>
    <artifactId>jdbctemplate</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>5.2.12.RELEASE</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>5.2.12.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
            </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.39</version>
        </dependency>
    </dependencies>

</project>

JavaConfig.java

package org.javaboy.jdbc;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

import javax.sql.DataSource;

/**
 * @author 邓雪松 (づ￣ 3￣)づ)
 * @create 2021-10-28-21-20
 * 这个类配置数据库的信息
 */
@Configuration
public class JavaConfig {
    @Bean
    DataSource dataSource(){
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql:///test01?serverTimezone=Asia/Shanghai");
        dataSource.setUsername("root");
        dataSource.setPassword("121803");
        return dataSource;
    }
    @Bean
    JdbcTemplate jdbcTemplate(){
        return new JdbcTemplate(dataSource());
    }
}

User.java

package org.javaboy.jdbc;

/**
 * @author 邓雪松 (づ￣ 3￣)づ)
 * @create 2021-10-28-21-15
 */
public class User {
    private Long id;
    private String username;
    private String address;
    private String favourite;

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", address='" + address + '\'' +
                ", favourite='" + favourite + '\'' +
                '}';
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getFavourite() {
        return favourite;
    }

    public void setFavourite(String favourite) {
        this.favourite = favourite;
    }
}

applicationContext.xml

<?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 http://www.springframework.org/schema/beans/spring-beans.xsd">
    <!--用xml的方式配置JDBCTemplate-->
    <bean class="org.springframework.jdbc.datasource.DriverManagerDataSource" id="dataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql:///test01?serverTimezone=Asia/Shanghai"/>
        <property name="username" value="root"/>
        <property name="password" value="121803"/>
    </bean>

    <bean class="org.springframework.jdbc.core.JdbcTemplate" id="jdbcTemplate">
        <property name="dataSource" ref="dataSource"/>
    </bean>
</beans>

JdbcTest.java

package org.javaboy.jdbc;

import org.junit.Before;
import org.junit.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

import java.util.List;

/**
 * @author 邓雪松 (づ￣ 3￣)づ)
 * @create 2021-10-28-21-35
 */
public class JdbcTest {
    JdbcTemplate jdbcTemplate;
    @Before
    public void before(){
        //AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(JavaConfig.class);
        //xml的话是下边的
        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
        jdbcTemplate = ctx.getBean(JdbcTemplate.class);

    }
    //增
    @Test
    public void test1(){
        jdbcTemplate.update("insert into user (username,address,favourite) VALUES (?,?,?);","javaboy","www.whereami.org","game");
    }
    //改
    @Test
    public void test2(){
        jdbcTemplate.update("update user set username = ? where id=?;","JavaBoy",11);
    }
    //删
    @Test
    public void test3(){
        jdbcTemplate.update("delete from user where id = ?",11);
    }
    //查
    @Test
    public void test4(){
        List<User> list = jdbcTemplate.query("select * from user", new BeanPropertyRowMapper<User>(User.class));
        System.out.println("list = "+list);
    }
}