统一异常处理

Chapter3-1-6/src/main/java/com/didispace/dto/ErrorInfo.java

@@ -0,0 +1,53 @@
+package com.didispace.dto;
+
+public class ErrorInfo<T> {
+
+    public static final Integer OK = 0;
+    public static final Integer ERROR = 100;
+
+    private Integer code;
+    private String message;
+    private String url;
+    private T data;
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public static Integer getOK() {
+        return OK;
+    }
+
+    public static Integer getERROR() {
+        return ERROR;
+    }
+
+    public Integer getCode() {
+        return code;
+    }
+
+    public void setCode(Integer code) {
+        this.code = code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public T getData() {
+        return data;
+    }
+
+    public void setData(T data) {
+        this.data = data;
+    }
+    
+}

Chapter3-1-6/src/main/java/com/didispace/exception/GlobalExceptionHandler.java

@@ -1,13 +1,15 @@
 package com.didispace.exception;
 
+import com.didispace.dto.ErrorInfo;
 import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.servlet.ModelAndView;
 
 import javax.servlet.http.HttpServletRequest;
 
 @ControllerAdvice
-class GlobalExceptionHandler {
+public class GlobalExceptionHandler {
 
     @ExceptionHandler(value = Exception.class)
     public ModelAndView defaultErrorHandler(HttpServletRequest req, Exception e) throws Exception {
@@ -18,4 +20,16 @@ class GlobalExceptionHandler {
         return mav;
     }
 
-}
+    @ExceptionHandler(value = MyException.class)
+    @ResponseBody
+    public ErrorInfo<String> jsonErrorHandler(HttpServletRequest req, MyException e) throws Exception {
+        ErrorInfo<String> r = new ErrorInfo<>();
+        r.setMessage(e.getMessage());
+        r.setCode(ErrorInfo.ERROR);
+        r.setData("Some Data");
+        r.setUrl(req.getRequestURL().toString());
+        return r;
+    }
+
+}
+

Chapter3-1-6/src/main/java/com/didispace/exception/MyException.java

@@ -0,0 +1,15 @@
+package com.didispace.exception;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/5/2 上午10:50.
+ * @blog http://blog.didispace.com
+ */
+public class MyException extends Exception {
+
+    public MyException(String message) {
+        super(message);
+    }
+
+}

Chapter3-1-6/src/main/java/com/didispace/web/HelloController.java

@@ -1,5 +1,6 @@
 package com.didispace.web;
 
+import com.didispace.exception.MyException;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.ModelMap;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -20,6 +21,11 @@ public class HelloController {
         throw new Exception("发生错误");
     }
 
+    @RequestMapping("/json")
+    public String json() throws MyException {
+        throw new MyException("发生错误2");
+    }
+
     @RequestMapping("/")
     public String index(ModelMap map) {
         map.addAttribute("host", "http://blog.didispace.com");