spring boot MySQL操作

极简spring boot MySQL测试

默认:

1. spring boot环境已经搭好,可以跑最基本的hello world

2. 有MySQL环境有部分测试数据表,并且有MySQL语法基础

配置 application.yml

如下配置,根据自己的数据库信息与个人需求配置

  server:
    tomcat:
      uri-encoding: UTF-8
      threads:
        max: 200
        min-spare: 30
      connection-timeout: 5000ms
    port: 8080



  spring:
    datasource:
      url: jdbc:mysql://localhost:3306/login(你的路径)
      username: root(你的用户名)
      password: 你的密码
      driver-class-name: com.mysql.cj.jdbc.Driver

配置pom.xml依赖

<!--    ....其他信息-->

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.1.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.26</version>
        </dependency>

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

        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>javax.persistence-api</artifactId>
            <version>2.2</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.webjars.bower</groupId>
            <artifactId>RWD-Table-Patterns</artifactId>
            <version>5.2.5</version>
        </dependency>
        <dependency>
            <groupId>org.webjars.bower</groupId>
            <artifactId>RWD-Table-Patterns</artifactId>
            <version>5.2.5</version>
        </dependency>
        <dependency>
            <groupId>org.webjars.bower</groupId>
            <artifactId>RWD-Table-Patterns</artifactId>
            <version>5.2.5</version>
        </dependency>
        <dependency>
            <groupId>org.webjars.bower</groupId>
            <artifactId>RWD-Table-Patterns</artifactId>
            <version>5.2.5</version>
        </dependency>
        <dependency>
            <groupId>org.webjars.npm</groupId>
            <artifactId>github-com-lorenzofox3-Smart-Table</artifactId>
            <version>2.1.11</version>
        </dependency>

        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>javax.persistence-api</artifactId>
            <version>2.2</version>
        </dependency>

        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>javax.persistence-api</artifactId>
            <version>2.2</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

代码示例:

package app.helloworld3;


import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Map;

import org.springframework.jdbc.core.JdbcTemplate;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;
import java.util.Map;

@SpringBootApplication
public class Helloworld3Application {

    public static void main(String[] args) {
        SpringApplication.run(Helloworld3Application.class, args);
    }


    @RestController
    public class helloworld {

        @GetMapping("/index")
        public String index() {
            return "Hello World";
        }
    }



    @Controller
    public class UserController {
        @Autowired
        private JdbcTemplate jdbcTemplate;
//        private JdbcTemplate jdbcTemplate;

        @RequestMapping(value = "/getUsers",method = RequestMethod.GET)
        @ResponseBody
        /*
         * List 里的对象是Map对象，而Map对象是
         * 由一个String类型的键和Object类型的值组成
         * */
        public List<Map<String,Object>> getUsers(){
            String sql="select * from user";//SQL查询语句
            List<Map<String,Object>> list=jdbcTemplate.queryForList(sql);
            return list;
        }
    }
  }

示例结果:

掌握了select,其他增加(insert,)删除(delete),改,就改一下字段就可以了

本文由mdnice多平台发布