Java. Lang. A NumberFormatException: For input string: "pid" 
The at Java. Lang. A NumberFormatException. ForInputString (65). A NumberFormatException Java: 
The at Java. Lang. Integer. ParseInt (Integer. Java: 580) 
The at Java. Lang. Integer. ParseInt (Integer. Java: 615) 
The at javax.mail. El. ListELResolver. Coerce (ListELResolver. Java: 157) 
The at javax.mail. El. ListELResolver. GetValue (ListELResolver. Java: 70) 
The at org. Apache. Jasper. El. JasperELResolver. GetValue (JasperELResolver. Java: 110) 
The at org. Apache. El. Parser. AstValue. GetValue (AstValue. Java: 169) 
The at org. Apache. El. ValueExpressionImpl. GetValue (ValueExpressionImpl. Java: 184) 
The at org. Apache. Jasper. Runtime. PageContextImpl. Called proprietaryEvaluate (PageContextImpl. Java: 943) 
The at org. Apache. JSP. Admin. Paper. Main_jsp. _jspService (main_jsp. Java: 486) 
The at org. Apache. Jasper. Runtime. HttpJspBase. Service (HttpJspBase. Java: 70) 
The at javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 729) 
At org. Apache. Jasper. Servlet. JspServletWrapper. Service (438) JspServletWrapper. Java: 
The at org. Apache. Jasper. Servlet. JspServlet. ServiceJspFile (JspServlet. Java: 396) 
At org. Apache. Jasper. Servlet. JspServlet. Service (340) JspServlet. Java: 
The at javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 729) 
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 292) 
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 207) 
At org, apache tomcat, websocket server WsFilter. DoFilter (WsFilter. Java: 52) 
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 240) 
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 207) 
The at org. Apache. Catalina. Core. ApplicationDispatcher. Invoke (ApplicationDispatcher. Java: 716) 
The at org. Apache. Catalina. Core. ApplicationDispatcher. The processRequest (ApplicationDispatcher. Java: 466) 
The at org. Apache. Catalina. Core. ApplicationDispatcher. DoForward (ApplicationDispatcher. Java: 391) 
The at org. Apache. Catalina. Core. ApplicationDispatcher. Forward (ApplicationDispatcher. Java: 318) 
At com. Finup. Servlet. PaperServlet. FindById (PaperServlet. Java: 109) 
At com. Finup. Servlet. PaperServlet. DoPost (PaperServlet. Java: 62) 
At com. Finup. Servlet. PaperServlet. DoGet (42 PaperServlet. Java:) 
The at javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 622) 
The at javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 729) 

 & lt; C: forEach items="${requestScope. List}" var="list" & gt; 
 
 ${list. Pid} & lt;/td> 
 ${list. The pname} & lt;/td> 
 The ${list. Pnumber} & lt;/td> 
 ${list. Pstate} & lt;/td> 
   
 
 

The servlet

 String spage=request. The getParameter (" page "); 
String id=request. The getParameter (" pid "); 
Int pid=Integer. ParseInt (id); 
List Listall=paperService. FindById (pid); 
Int page; 
Int size=3; 
If (spage=="") {
Page=1; 

} else {
Page=Integer. ParseInt (spage); 
} 
Int pageCount; 
Int count=listall. The size (); 
If (size==0) count % {
PageCount=count/size; 
} else {
PageCount=(count/size) + 1; 
} 
If (count<{
=3)Request. SetAttribute (" list ", listall); 

} else {
List Listall2=paperService. FindById (pid); 
Question que=new Question (); 
List List=new ArrayList (); 
Listall2. Add (que); 
Int start=(page 1) * size; 
Int the end=start + size; 
List=listall the subList (start, end); 
Request. SetAttribute (" list ", a list); 
} 
String MSG="all"; 
Request. SetAttribute (" pageCount ", pageCount); 
Request. SetAttribute (" count ", count); 
Request. SetAttribute (" MSG ", MSG); 
Request. GetRequestDispatcher (" admin/paper/main. JSP "). The forward (request, response); 

CodePudding user response:

Integer. The parseInt (id); To Interger. The valueOf (id) or String id=request. The getParameter (" pid ") into an int id=request. The getParameter (" pid ");

CodePudding user response:

The error must be an Integer. The parseInt () throws exceptions, throw in the way a NumberFormatException. ForInputString (s), show that the "pid" is the value, the debug debugging, the value should be wrong

CodePudding user response:

reference 1/f, anonymous street response:

Integer. The parseInt (id); To Interger. The valueOf (id) or String id=request. The getParameter (" pid ") into an int id=request. The getParameter (" pid ");

Still won't do I pass the pid is 1, the transformation is 1, but I'm still an error