<%@ page contentType ="text/html;charset=GB2312" pageEncoding = "gb2312"%>
<%@page import = "java.io.*" %>
<html>
<body>
<%!
class FileJSP implements FilenameFilter{
String str = null;
FileJSP(String s){
str = "."+s;
}
public boolean accept(File dir,String name){
return name.endsWith(str);
}
}
String fileName;
%>
<p>下面列出了一些服务器上的JSP文件
<%
File dir = new File("E:\\apache-tomcat-7.0.23\\webapps\\demo");
FileJSP file_jsp = new FileJSP("jsp");
String file_name[] = dir.list(file_jsp);
for(int i = 0 ; i < file_name.length; i++){
out.print("<br>"+file_name[i]);
}
%>
<p>请输入一个JSP文件的名字，加载这个JSP文件:
<form action = "demo17.jsp" method = post name =form >
<input type = "text" name ="ok" >
<br>
<input type = "submit" value = "送出" name = submit>
</form>
<%
fileName =request.getParameter("ok");
%>
<jsp:include page = "<%=fileName %>"></jsp:include>
</body>
</html>
错误信息：
HTTP Status 500 -
--------------------------------------------------------------------------------
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /demo17.jsp at line 35
32: <%
33: fileName =""+request.getParameter("ok");
34: %>
35: <jsp:include page = "<%=fileName %>"></jsp:include>
36:
37: </body>
38: </html>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:460)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause
java.io.FileNotFoundException: The requested resource (/demo/null) is not available
org.apache.catalina.servlets.DefaultServlet.serveResource(DefaultServlet.java:773)
org.apache.catalina.servlets.DefaultServlet.doGet(DefaultServlet.java:411)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:954)
org.apache.jsp.demo17_jsp._jspService(demo17_jsp.java:102)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
------解决方案--------------------------------------------------------
因为一开始进去的时候，你还没在你的id=“ok”的输入框中输入东西，所以取不到值。然后报错了，你加个if判断下应该就可以了~你可以尝试下吧