pom.xml

<!--jdbc-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>

<!--mysql-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>
 

application.yaml

spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    url: jdbc:mysql://127.0.0.1:3306/song?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8
    username: root
    password: root

JDBCController

@RestController
public class JDBCController {

    @Autowired
    JdbcTemplate jdbcTemplate;

    // 查詢資料庫的所有資訊
    @GetMapping("/userList")
    public List<Map<String, Object>> userList() {
        String sql = "select * from user";
        List<Map<String, Object>> list_maps = jdbcTemplate.queryForList(sql);

        return list_maps;
    }

    @GetMapping("/addUser")
    public String addUser() {
        String sql = "insert into songyuming.user(id,name,pwd) values (4,'小強','123456')";
        jdbcTemplate.update(sql);
        return "update-ok";
    }

    @GetMapping("/updateUser/{id}")
    public String updateUser(@PathVariable("id") Integer id) {
        String sql = "update songyuming.user set name = ?,pwd=? where id=" + id;
        // 封裝
        Object[] params = new Object[2];
        params[0] = "小黃";
        params[1] = "456789";
        jdbcTemplate.update(sql,params);
        return "update-ok";
    }

    @GetMapping("/deleteUser/{id}")
    public String deleteUser(@PathVariable("id") Integer id) {
        String sql = "delete from songyuming.user where id=?";
        jdbcTemplate.update(sql, id);
        return "update-ok";
    }

}