异常处理器等

springMvc/src/main/java/com/controller/UserController.java

@@ -59,6 +59,7 @@ public class UserController {
     public Map save4() {
         HashMap<String, String> stringStringHashMap = new HashMap<String, String>();
         stringStringHashMap.put("1","2");
+
         return stringStringHashMap;
     }