For input string: ""

2017-03-24 16:01:00,534 (http-nio-8080-exec-3) [ FrameworkServlet.java:993:DEBUG] Could not complete request
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)

 

说明字符串转换过程抛异常。就去java代码中找相关找换类型的代码。比如NumberFormatException看看哪里涉及到了数字类型的转换。