初始化项目

src/main/java/com/tem/bocai/BocaiApplication.java

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+package com.tem.bocai;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class BocaiApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(BocaiApplication.class, args);
+    }
+
+}

src/main/java/com/tem/bocai/config/CorsConfig.java

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+package com.tem.bocai.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class CorsConfig implements WebMvcConfigurer {
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        registry.addMapping("/api/**")
+                .allowedOrigins("*") // 在生产环境中应该限制具体的域名
+                .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS")
+                .allowedHeaders("*")
+                .allowCredentials(false);
+    }
+}

src/main/java/com/tem/bocai/controller/UserController.java

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+package com.example.bocai.controller;
+
+import com.example.bocai.entity.User;
+import com.example.bocai.repository.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+import java.util.Optional;
+
+@RestController
+@RequestMapping("/api/users")
+public class UserController {
+    @Autowired
+    private UserRepository userRepository;
+
+    // 获取所有用户
+    @GetMapping
+    public List<User> getAllUsers() {
+        return userRepository.findAll();
+    }
+
+    // 根据ID获取用户
+    @GetMapping("/{id}")
+    public ResponseEntity<User> getUserById(@PathVariable Long id) {
+        Optional<User> user = userRepository.findById(id);
+        return user.map(ResponseEntity::ok).orElseGet(() -> ResponseEntity.notFound().build());
+    }
+
+    // 创建新用户
+    @PostMapping
+    public User createUser(@RequestBody User user) {
+        return userRepository.save(user);
+    }
+
+    // 更新用户
+    @PutMapping("/{id}")
+    public ResponseEntity<User> updateUser(@PathVariable Long id, @RequestBody User userDetails) {
+        Optional<User> user = userRepository.findById(id);
+        if (user.isPresent()) {
+            User updatedUser = user.get();
+            updatedUser.setName(userDetails.getName());
+            updatedUser.setEmail(userDetails.getEmail());
+            updatedUser.setPassword(userDetails.getPassword());
+            return ResponseEntity.ok(userRepository.save(updatedUser));
+        } else {
+            return ResponseEntity.notFound().build();
+        }
+    }
+
+    // 删除用户
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> deleteUser(@PathVariable Long id) {
+        Optional<User> user = userRepository.findById(id);
+        if (user.isPresent()) {
+            userRepository.delete(user.get());
+            return ResponseEntity.noContent().build();
+        } else {
+            return ResponseEntity.notFound().build();
+        }
+    }
+}

src/main/java/com/tem/bocai/entity/User.java

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+package com.example.bocai.entity;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import lombok.Data;
+
+@Entity
+@Data
+public class User {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    private String name;
+    private String email;
+    private String password;
+}

src/main/java/com/tem/bocai/repository/UserRepository.java

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+package com.example.bocai.repository;
+
+import com.example.bocai.entity.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface UserRepository extends JpaRepository<User, Long> {
+    User findByEmail(String email);
+}

src/main/resources/application.properties

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+# SQLite数据库配置
+spring.datasource.url=jdbc:sqlite:bocai.db
+spring.datasource.driver-class-name=org.sqlite.JDBC
+spring.datasource.username=
+spring.datasource.password=
+
+# JPA配置
+spring.jpa.hibernate.ddl-auto=update
+spring.jpa.show-sql=true
+spring.jpa.database-platform=org.hibernate.community.dialect.SQLiteDialect
+spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true