Return BAD_REQUEST for parameter error (#222)

diff --git a/dubbo-admin-backend/src/main/java/org/apache/dubbo/admin/handler/CustomExceptionHandler.java b/dubbo-admin-backend/src/main/java/org/apache/dubbo/admin/handler/CustomExceptionHandler.java
index bbba539..191250d 100644
--- a/dubbo-admin-backend/src/main/java/org/apache/dubbo/admin/handler/CustomExceptionHandler.java
+++ b/dubbo-admin-backend/src/main/java/org/apache/dubbo/admin/handler/CustomExceptionHandler.java
@@ -24,6 +24,7 @@
 import org.apache.dubbo.common.logger.Logger;
 import org.apache.dubbo.common.logger.LoggerFactory;
 import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.ServletRequestBindingException;
 import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.ResponseBody;
@@ -66,7 +67,8 @@
 
     @ResponseBody
     @ResponseStatus(HttpStatus.BAD_REQUEST)
-    @ExceptionHandler(value = {ParamValidationException.class})
+    @ExceptionHandler(value = {ParamValidationException.class,
+            ServletRequestBindingException.class})
     public CommonResponse paramValidationExceptionHandle(Exception e) {
         CommonResponse commonResponse = CommonResponse.createCommonResponse();
         logger.error("[ParamValidationException]Exception:", e);