谁说 AI 编程工具缺乏记忆和联想能力，简单琐碎的需求完全可以交给它

<?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>3.1.0</version>		<relativePath/> <!-- lookup parent from repository -->	</parent>	<groupId>com.example</groupId>	<artifactId>demo</artifactId>	<version>0.0.1-SNAPSHOT</version>	<name>demo</name>	<description>demo</description>	<properties>		<java.version>17</java.version>	</properties>	<dependencies>		<dependency>			<groupId>org.springframework.boot</groupId>			<artifactId>spring-boot-starter-data-jpa</artifactId>		</dependency>
		<dependency>			<groupId>org.projectlombok</groupId>			<artifactId>lombok</artifactId>			<optional>true</optional>		</dependency>		<dependency>			<groupId>org.springframework.boot</groupId>			<artifactId>spring-boot-starter-web</artifactId>		</dependency>
		<dependency>			<groupId>com.h2database</groupId>			<artifactId>h2</artifactId>			<scope>runtime</scope>		</dependency>		<dependency>			<groupId>org.springframework.boot</groupId>			<artifactId>spring-boot-starter-test</artifactId>			<scope>test</scope>		</dependency>	</dependencies>
	<build>		<plugins>			<plugin>				<groupId>org.springframework.boot</groupId>				<artifactId>spring-boot-maven-plugin</artifactId>			</plugin>		</plugins>	</build>
</project>

package com.example.demo.controller;
import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;
@Controllerpublic class PingController {
    @RequestMapping("/ping")    public @ResponseBody String greeting() {        return "pong";    }
}

package com.example.demo;
import com.example.demo.controller.PingController;import org.junit.jupiter.api.Test;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;import org.springframework.test.web.servlet.MockMvc;
import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
@AutoConfigureMockMvc@WebMvcTest(PingController.class)public class TestWebApplication {    @Autowired    private MockMvc mockMvc;
    @Test    public void shouldReturnDefaultMessage() throws Exception {        this.mockMvc.perform(get("/ping")).andDo(print()).andExpect(status().isOk())                .andExpect(content().string("pong"));    }}

package com.example.demo.model;

import jakarta.persistence.*;import lombok.AllArgsConstructor;import lombok.Getter;import lombok.NoArgsConstructor;import lombok.Setter;import org.springframework.stereotype.Indexed;
@Entity@Getter@Setter@AllArgsConstructor@NoArgsConstructor@Table(name = "game_users")public class User {    @Id    private Long id;    @Column(unique = true, nullable = false)    private String username;    @Column(nullable = false, length = 64)    private String password;    @Column(unique = true, nullable = false)    private String email;}

package com.example.demo.dao;
import com.example.demo.model.User;import org.springframework.data.jpa.repository.JpaRepository;import org.springframework.stereotype.Repository;
import java.util.Optional;
@Repositorypublic interface UserDao extends JpaRepository<User, Long> {    // function to implement find user by email    Optional<User> findByEmail(String email);
    Optional<User> findByUsername(String username);
    // two function to implement find user by id or email    Optional<User> findById(Long id);    Optional<User> findByEmailIgnoreCase(String email);
    // function to implement check user is existed    Boolean existsByEmail(String email);
}

package com.example.demo;
import com.example.demo.dao.UserDao;import com.example.demo.model.User;import org.slf4j.Logger;import org.springframework.boot.CommandLineRunner;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;
@Configurationclass LoadDatabase {    public static final Logger log = org.slf4j.LoggerFactory.getLogger(LoadDatabase.class);
    // this is Bean is loaded once in the application context    // it is used to load the data into the database    @Bean    public CommandLineRunner initDatabase(UserDao dao) {        return args -> {            log.info("Preloading " + dao.save(new User(1L, "test1", "111111", "abc@gmail.com")));            log.info("Preloading " + dao.save(new User(2L, "test2", "222222", "123@gmail.com")));        };    }}

package com.example.demo.service;
import com.example.demo.dao.UserDao;import com.example.demo.model.User;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;
import java.util.Optional;
@Servicepublic class UserDetailServiceImpl {    private final UserDao userdao;
    @Autowired    public UserDetailServiceImpl(UserDao userdao) {        this.userdao = userdao;    }
    public User getUserByUsername(String username) throws Exception {        Optional<User> user = userdao.findByUsername(username);        if (user.isPresent()) {            return user.get();        } else {            throw new Exception("User not found");        }    }}

package com.example.demo.controller;
import com.example.demo.model.User;import com.example.demo.service.UserDetailServiceImpl;import org.apache.coyote.Response;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.http.HttpStatus;import org.springframework.http.ResponseEntity;import org.springframework.web.bind.annotation.*;
@RestController@RequestMapping("/api/auth")public class UserController {    private final UserDetailServiceImpl userDetailService;
    @Autowired    public UserController(UserDetailServiceImpl userDetailService) {        this.userDetailService = userDetailService;    }
    @PostMapping("/login")    public ResponseEntity<?> login(@RequestBody User user) {        try {            if (user.getUsername().isEmpty()) {                return ResponseEntity.badRequest().body("user name is empty");            }
            User res;            res = userDetailService.getUserByUsername(user.getUsername());            if (res == null) {                return ResponseEntity.badRequest().body("user not  found");            }
            if (res.getPassword().equals(user.getPassword())) {                return ResponseEntity.ok(res);            }            return new ResponseEntity<>("user password invalid", HttpStatus.BAD_REQUEST);        } catch (Exception e) {            return ResponseEntity.notFound().build();        }    }}