public ModelAndView FilecardAdd(HttpServletRequest request,Filecard filecard){
Integer id=new Integer(request.getParameter("id"));
if(id==null){
id=UUID.randomUUID().toString();
}
filecard.setId(id);
fs.addFilecard(filecard);
mv.setViewName("redirect:getFilecard.do");
return mv;
}
在id=UUID.randomUUID().toString();一直报错；
哪位大神能解释一下上段代码的意思和具体怎么改啊
jsp里报错HTTP Status 500 - Request processing failed; nested exception is java.lang.NumberFormatException: null
type Exception report
message Request processing failed; nested exception is java.lang.NumberFormatException: null
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NumberFormatException: null
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:656)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
com.record.filter.TestFilter.doFilter(TestFilter.java:45)
root cause
java.lang.NumberFormatException: null
