SpringBoot整合JDBC练习使用
一、引入JDBC依赖和Mysql数据库驱动
<!--jdbc依赖-->
<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>
二、配置数据库数据源
创建application.yml文件,并输入以下配置
spring:
datasource:
username: root
password: mysql
#假如时区报错,就添加一个时区的配置: serverTimezone=UTC
url: jdbc:mysql://localhost:3306/test?useUnicode=true&serverTimezone=UTC&characterEncoding=utf-8
driver-class-name: com.mysql.cj.jdbc.Driver
三、接口
package com.example.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
import java.util.Map;
/**
* JDBC练习使用
* @author 桃味果仁
*/
@RestController
public class JDBCController {
@Autowired
private JdbcTemplate jdbcTemplate;
//没有实体类,数据库中的数据怎么获取? 使用map
/**
* 获取用户列表
* @return
*/
@GetMapping("/userList")
public List<Map<String,Object>> userList(){
String sql = "select * from user";
List<Map<String, Object>> mapsList = jdbcTemplate.queryForList(sql);
return mapsList;
}
/**
* 添加用户
* @return
*/
@GetMapping("/addUser")
public String addUser(){
String sql = "insert into user(username, sex) values ('乐乐', '女')";
jdbcTemplate.execute(sql);
return "is ok";
}
/**
* 更新用户
* @param id
* @return
*/
@GetMapping("/updateUser/{id}")
public String updateUser(@PathVariable("id") int id){
String sql = "update user set username=?, sex=? where id="+id;
Object[] para = new Object[2];
para[0] = "呵呵";
para[1] = "女";
int update = jdbcTemplate.update(sql, para);
return "updateUser ok" + update;
}
/**
* 删除用户
* @param id
* @return
*/
@GetMapping("/deleteUser/{id}")
public String deleteUser(@PathVariable("id") int id){
String sql = "delete from user where id=?";
int update = jdbcTemplate.update(sql, id);
return "deleteUser ok" + update;
}
}