1、准备表,创建表语句如下
CREATE TABLE `girl` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`cup_Size` varchar(100) COLLATE utf8mb4_bin DEFAULT NULL,
`age` int(11) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;
2、pom.xml文件,内容如下
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.6.4</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.hmblogs</groupId>
<artifactId>backend</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>backend</name>
<description>backend</description>
<properties>
<java.version>8</java.version>
<druid.version>1.2.8</druid.version>
</properties>
<dependencies>
<!-- druid数据源驱动 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>${druid.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.28</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
3、GirlController.java控制层代码,如下
package com.hmblogs.backend.controller;
import com.hmblogs.backend.dao.GirlRep;
import com.hmblogs.backend.entity.Girl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
@RestController
public class GirlController {
@Autowired
private GirlRep girlRep;
/**
* 查询所有女生列表
* @return
*/
@GetMapping(value = "/girls")
public List<Girl> getGirlList(){
return girlRep.findAll();
}
/**
* 添加一个女生
* @param cupSize
* @param age
* @return
*/
@RequestMapping(value = "/girls",method = RequestMethod.POST)
public Girl addGirl(@RequestParam("cupSize") String cupSize,
@RequestParam("age") Integer age){
Girl girl = new Girl();
girl.setAge(age);
girl.setCupSize(cupSize);
return girlRep.save(girl);
}
}
4、dao层代码如下,
package com.hmblogs.backend.dao;
import com.hmblogs.backend.entity.Girl;
import org.springframework.data.jpa.repository.JpaRepository;
//其中第二个参数为Id的类型
public interface GirlRep extends JpaRepository<Girl,Integer> {
}
5、entity类代码如下
package com.hmblogs.backend.entity;
import lombok.Data;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
@Data
public class Girl {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
private String cupSize;
private Integer age;
}
6、启动类代码如下
package com.hmblogs.backend;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class BackendApplication {
public static void main(String[] args) {
SpringApplication.run(BackendApplication.class, args);
}
}
7、application.yml代码如下
server:
port: 8080
servlet.context-path: /backend
spring:
datasource:
druid:
db-type: com.alibaba.druid.pool.DruidDataSource
driverClassName: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://${DB_HOST:localhost}:${DB_PORT:3306}/${DB_NAME:eladmin}?serverTimezone=Asia/Shanghai&characterEncoding=utf8&useSSL=false
username: ${DB_USER:root}
password: ${DB_PWD:123456}
9、启动成功,并且贴出代码结构
10、调试接口
10.1调试get接口获取所有girl
http://localhost:8080/backend/girls
10.2调试post添加girl接口
http://localhost:8080/backend/girls?cupSize=A22&age=18
添加成功。