【jpa】springboot使用jpa示例

1. 请求示例

curl --location --request POST 'http://127.0.0.1:8080/user' \
--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)' \
--header 'Content-Type: application/json' \
--header 'Accept: */*' \
--header 'Host: 127.0.0.1:8080' \
--header 'Connection: keep-alive' \
--data-raw '{"name": "张三","age": 22,"phone": "18888888888","email": "[e-mail]","address": "上海市嘉定区"
}'

curl --location --request GET 'http://127.0.0.1:8080/user/1' \
--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)' \
--header 'Accept: */*' \
--header 'Host: 127.0.0.1:8080' \
--header 'Connection: keep-alive'

curl --location --request POST 'http://127.0.0.1:8080/user' \
--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)' \
--header 'Content-Type: application/json' \
--header 'Accept: */*' \
--header 'Host: 127.0.0.1:8080' \
--header 'Connection: keep-alive' \
--data-raw '{"id": 1,"name": "李四","age": 22,"phone": "18888888888","email": "[e-mail]","address": "上海市嘉定区"
}'

curl --location --request DELETE 'http://127.0.0.1:8080/user/1' \
--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)' \
--header 'Accept: */*' \
--header 'Host: 127.0.0.1:8080' \
--header 'Connection: keep-alive'

curl --location --request GET 'http://127.0.0.1:8080/user/list' \
--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)' \
--header 'Accept: */*' \
--header 'Host: 127.0.0.1:8080' \
--header 'Connection: keep-alive'

2. pom依赖

<?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.example</groupId><artifactId>Learn</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><version>2.5.6</version></dependency><!-- Spring Boot Starter Data JPA --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId><version>2.5.6</version></dependency><!-- MySQL 8.0 Connector --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.32</version> <!-- 替换为具体的8.0版本，如8.0.32 --></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.34</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>2.0.52</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-validation</artifactId><version>2.5.6</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build>
</project>

3. application.yaml

spring:datasource:url: jdbc:mysql://localhost:3306/student?useSSL=false&serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8username: rootpassword: rootdriver-class-name: com.mysql.cj.jdbc.Driverjpa:hibernate:ddl-auto: updateshow-sql: trueproperties:hibernate:dialect: org.hibernate.dialect.MySQL8Dialect

4.controller

package com.learn.controller;import com.learn.entity.UserEntity;
import com.learn.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;import javax.validation.Valid;
import java.util.List;@RestController
@RequestMapping("/user")
@Valid
public class UserController {@Autowiredprivate UserService userService;@PostMappingpublic UserEntity save(@Validated @RequestBody UserEntity user) {return userService.save(user);}@DeleteMapping("/{id}")public void delete(@PathVariable Long id) {userService.delete(id);}@GetMapping("/{id}")public UserEntity findById(@PathVariable Long id) {return userService.findById(id);}@GetMapping("/list")public List<UserEntity> list() {return userService.list();}
}

5. service

package com.learn.service;import com.learn.entity.UserEntity;
import com.learn.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;@Service
public class UserService {@Autowiredprivate UserRepository userRepository;public List<UserEntity> list() {return userRepository.findAll();}public UserEntity save(UserEntity user) {return userRepository.saveAndFlush(user);}public void delete(Long id) {userRepository.deleteById(id);}public UserEntity findById(Long id) {return userRepository.findById(id).get();}}

6. repository

package com.learn.repository;import com.learn.entity.UserEntity;
import org.springframework.data.jpa.repository.JpaRepository;public interface UserRepository extends JpaRepository<UserEntity, Long> {
}

7. 实体

package com.learn.entity;import lombok.Data;import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.validation.Valid;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;/*** @date 2024/12/12* @description 实体*/
@Data
@Table(name = "user")
@Entity
@Valid
public class UserEntity {@Id@GeneratedValueprivate Long id;@NotBlank(message = "姓名不能为空")private String name;@Min(value = 0, message = "年龄不能小于0")private Integer age;@Pattern(regexp = "^1[3456789]\\d{9}$", message = "手机号格式不正确")private String phone;@Pattern(regexp = "^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\\.[a-zA-Z0-9_-]+)+$", message = "邮箱格式不正确")private String email;@Size(max = 100, message = "地址长度不能超过100")private String address;
}

8. 启动类

package com.learn;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** @date 2024/12/11* @description*/
@SpringBootApplication
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}
}