异常处理

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

@@ -6,13 +6,14 @@ import com.cxyxiaomo.flashsale.error.EmBusinessError;
 import com.cxyxiaomo.flashsale.response.CommonReturnType;
 import com.cxyxiaomo.flashsale.service.UserService;
 import com.cxyxiaomo.flashsale.service.model.UserModel;
-import org.apache.catalina.User;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.*;
+
+import javax.servlet.http.HttpServletRequest;
+import java.util.HashMap;
 
 @Controller("user") // 允许被SpringBoot扫描到
 @RequestMapping("/user") // 通过 "/user" 访问到
@@ -28,7 +29,7 @@ public class UserController {
         UserModel userModel = userService.getUserById(id);
 
         // 若获取的用户信息不存在
-        if(userModel==null){
+        if (userModel == null) {
             throw new BusinessException(EmBusinessError.USER_NOT_EXIST);
         }
         // 将核心领域模型用户对象转化为可供UI使用的viewobject
@@ -48,4 +49,21 @@ public class UserController {
         BeanUtils.copyProperties(userModel, userVO);
         return userVO;
     }
+
+    // 定义ExceptionHandler解决未被Controller层吸收的Exception
+    @ExceptionHandler(Exception.class)
+    @ResponseStatus(HttpStatus.OK)
+    @ResponseBody
+    public Object handlerException(HttpServletRequest request,Exception ex) {
+
+        BusinessException businessException = (BusinessException) ex;
+        HashMap<Object, Object> responseData = new HashMap<>();
+        responseData.put("errCode",businessException.getErrCode());
+        responseData.put("errMsg",businessException.getErrMsg());
+
+        CommonReturnType commonReturnType = new CommonReturnType();
+        commonReturnType.setStatus("fail");
+        commonReturnType.setData(responseData);
+        return commonReturnType;
+    }
 }