...

src/main/java/cn/com/qmth/examcloud/web/support/ControllerSupport.java

@@ -245,7 +245,7 @@ public abstract class ControllerSupport {
 	protected String getRequiredStringParam(String paramName) {
 		String value = getRequest().getParameter(paramName);
 		if (StringUtils.isBlank(value)) {
-			throw new StatusException("520", "参数为空");
+			throw new StatusException("520", "param is  missing. paramName=" + paramName);
 		} else {
 			return value.trim();
 		}