定义通用的返回对象--返回正确信息

src/main/java/com/cxyxiaomo/flashsale/controller/UserController.java

@@ -1,6 +1,7 @@
 package com.cxyxiaomo.flashsale.controller;
 
 import com.cxyxiaomo.flashsale.controller.viewobject.UserVO;
+import com.cxyxiaomo.flashsale.response.CommonReturnType;
 import com.cxyxiaomo.flashsale.service.UserService;
 import com.cxyxiaomo.flashsale.service.model.UserModel;
 import org.apache.catalina.User;
@@ -20,11 +21,15 @@ public class UserController {
 
     @RequestMapping("/get")
     @ResponseBody
-    public UserVO getUser(@RequestParam(name = "id") Integer id) {
+    public CommonReturnType getUser(@RequestParam(name = "id") Integer id) {
         // 调用Services服务获取对应id的用户对象并返回给前端
         UserModel userModel = userService.getUserById(id);
         // 将核心领域模型用户对象转化为可供UI使用的viewobject
-        return convertFromModel(userModel);
+        UserVO userVO = convertFromModel(userModel);
+
+        // 返回通用对象
+        CommonReturnType commonReturnType = CommonReturnType.create(userVO);
+        return commonReturnType;
     }
 
     private UserVO convertFromModel(UserModel userModel) {

src/main/java/com/cxyxiaomo/flashsale/response/CommonReturnType.java

@@ -0,0 +1,38 @@
+package com.cxyxiaomo.flashsale.response;
+
+public class CommonReturnType {
+    // 表明对应请求的返回处理结果 "success" 或 "fail"
+    private String Status;
+
+    // 若 status == "success" 则data内返回前端需要的JSON数据
+    // 若 status == "fail" 则data内使用通用的错误码格式
+    private Object Data;
+
+    // 定义一个通用的创建方法
+    public static CommonReturnType create(Object result) {
+        return CommonReturnType.create(result, "success");
+    }
+
+    public static CommonReturnType create(Object result, String status) {
+        CommonReturnType type = new CommonReturnType();
+        type.setStatus(status);
+        type.setData(result);
+        return type;
+    }
+
+    public String getStatus() {
+        return Status;
+    }
+
+    public void setStatus(String status) {
+        Status = status;
+    }
+
+    public Object getData() {
+        return Data;
+    }
+
+    public void setData(Object data) {
+        Data = data;
+    }
+}