重构后端服务架构并优化前端错误处理

backend-java/user-service/pom.xml

@@ -0,0 +1,56 @@
+<?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>
+    <parent>
+        <groupId>com.niumall</groupId>
+        <artifactId>niumall-backend</artifactId>
+        <version>1.0.0</version>
+    </parent>
+
+    <artifactId>user-service</artifactId>
+    <name>User Service</name>
+    <description>用户服务</description>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</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>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.33</version>
+        </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>

backend-java/user-service/run.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+echo "========================================="
+echo "  NiuMall User Service"
+echo "========================================="
+echo
+echo "要运行此服务，请确保已安装："
+echo "1. JDK 17 或更高版本"
+echo "2. Maven 3.8 或更高版本"
+echo
+echo "运行步骤："
+echo "1. 打开终端并导航到 user-service 目录"
+echo "2. 执行以下命令："
+echo "   mvn spring-boot:run"
+echo
+echo "服务将在端口 8081 上启动"
+echo "API 地址: http://localhost:8081/api/users"
+echo
+echo "注意：确保可以访问数据库服务器 129.211.213.226:9527"

backend-java/user-service/src/main/java/com/niumall/userservice/UserServiceApplication.java

@@ -0,0 +1,11 @@
+package com.niumall.userservice;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class UserServiceApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(UserServiceApplication.class, args);
+    }
+}

backend-java/user-service/src/main/java/com/niumall/userservice/controller/UserController.java

@@ -0,0 +1,55 @@
+package com.niumall.userservice.controller;
+
+import com.niumall.userservice.entity.User;
+import com.niumall.userservice.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/users")
+public class UserController {
+    
+    @Autowired
+    private UserService userService;
+    
+    @GetMapping
+    public ResponseEntity<List<User>> getAllUsers() {
+        List<User> users = userService.getAllUsers();
+        return ResponseEntity.ok(users);
+    }
+    
+    @GetMapping("/{id}")
+    public ResponseEntity<User> getUserById(@PathVariable Long id) {
+        User user = userService.getUserById(id);
+        if (user != null) {
+            return ResponseEntity.ok(user);
+        } else {
+            return ResponseEntity.notFound().build();
+        }
+    }
+    
+    @PostMapping
+    public ResponseEntity<User> createUser(@RequestBody User user) {
+        User savedUser = userService.createUser(user);
+        return ResponseEntity.ok(savedUser);
+    }
+    
+    @PutMapping("/{id}")
+    public ResponseEntity<User> updateUser(@PathVariable Long id, @RequestBody User user) {
+        User updatedUser = userService.updateUser(id, user);
+        if (updatedUser != null) {
+            return ResponseEntity.ok(updatedUser);
+        } else {
+            return ResponseEntity.notFound().build();
+        }
+    }
+    
+    @DeleteMapping("/{id}")
+    public ResponseEntity<Void> deleteUser(@PathVariable Long id) {
+        userService.deleteUser(id);
+        return ResponseEntity.noContent().build();
+    }
+}

backend-java/user-service/src/main/java/com/niumall/userservice/entity/User.java

@@ -0,0 +1,37 @@
+package com.niumall.userservice.entity;
+
+import jakarta.persistence.*;
+import lombok.Data;
+import java.time.LocalDateTime;
+
+@Data
+@Entity
+@Table(name = "api_users")
+public class User {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(unique = true, nullable = false)
+    private String username;
+
+    @Column(name = "password_hash", nullable = false)
+    private String passwordHash;
+
+    @Column(unique = true, nullable = false)
+    private String phone;
+
+    private String email;
+
+    @Column(name = "user_type", nullable = false)
+    private String userType;
+
+    @Column(name = "status")
+    private String status = "active";
+
+    @Column(name = "created_at")
+    private LocalDateTime createdAt;
+
+    @Column(name = "updated_at")
+    private LocalDateTime updatedAt;
+}

backend-java/user-service/src/main/java/com/niumall/userservice/repository/UserRepository.java

@@ -0,0 +1,13 @@
+package com.niumall.userservice.repository;
+
+import com.niumall.userservice.entity.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+import java.util.Optional;
+
+@Repository
+public interface UserRepository extends JpaRepository<User, Long> {
+    Optional<User> findByUsername(String username);
+    Optional<User> findByPhone(String phone);
+    Optional<User> findByEmail(String email);
+}

backend-java/user-service/src/main/java/com/niumall/userservice/service/UserService.java

@@ -0,0 +1,12 @@
+package com.niumall.userservice.service;
+
+import com.niumall.userservice.entity.User;
+import java.util.List;
+
+public interface UserService {
+    List<User> getAllUsers();
+    User getUserById(Long id);
+    User createUser(User user);
+    User updateUser(Long id, User user);
+    void deleteUser(Long id);
+}

backend-java/user-service/src/main/java/com/niumall/userservice/service/impl/UserServiceImpl.java

@@ -0,0 +1,44 @@
+package com.niumall.userservice.service.impl;
+
+import com.niumall.userservice.entity.User;
+import com.niumall.userservice.repository.UserRepository;
+import com.niumall.userservice.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import java.util.List;
+
+@Service
+public class UserServiceImpl implements UserService {
+    
+    @Autowired
+    private UserRepository userRepository;
+
+    @Override
+    public List<User> getAllUsers() {
+        return userRepository.findAll();
+    }
+
+    @Override
+    public User getUserById(Long id) {
+        return userRepository.findById(id).orElse(null);
+    }
+
+    @Override
+    public User createUser(User user) {
+        return userRepository.save(user);
+    }
+
+    @Override
+    public User updateUser(Long id, User user) {
+        if (userRepository.existsById(id)) {
+            user.setId(id);
+            return userRepository.save(user);
+        }
+        return null;
+    }
+
+    @Override
+    public void deleteUser(Long id) {
+        userRepository.deleteById(id);
+    }
+}

backend-java/user-service/src/main/resources/application.yml

@@ -0,0 +1,20 @@
+server:
+  port: 8081
+
+spring:
+  application:
+    name: user-service
+  datasource:
+    url: jdbc:mysql://129.211.213.226:9527/jiebandata?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
+    username: root
+    password: aiotAiot123!
+    driver-class-name: com.mysql.cj.jdbc.Driver
+  jpa:
+    hibernate:
+      ddl-auto: update
+    show-sql: true
+    database-platform: org.hibernate.dialect.MySQL8Dialect
+
+logging:
+  level:
+    com.niumall: debug

backend-java/user-service/target/classes/application.yml

@@ -0,0 +1,20 @@
+server:
+  port: 8081
+
+spring:
+  application:
+    name: user-service
+  datasource:
+    url: jdbc:mysql://129.211.213.226:9527/jiebandata?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
+    username: root
+    password: aiotAiot123!
+    driver-class-name: com.mysql.cj.jdbc.Driver
+  jpa:
+    hibernate:
+      ddl-auto: update
+    show-sql: true
+    database-platform: org.hibernate.dialect.MySQL8Dialect
+
+logging:
+  level:
+    com.niumall: debug