jsp出现File cannot be resolved to a type的问题

答案:2 悬赏:20 手机版

解决时间 2021-01-23 07:35

提问者网友：爱唱彩虹
2021-01-22 12:07

<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>
<html>
<body bgcolor="#csd96">


This is readFile.jsp



<%
String s= request.getParameter("file");
File f=new File(s);
if(f.exists())
{
out.println(" 文件"+s+"的内容：");
FileReader in=new FileReader(f);
BufferedReader br=new BufferedReader(in);
String line=null;
while((line=br.readLine())!=null)
{
out.println(" "+line);
}
}
else
{
%>
<jsp:forward page="error.jsp">
<jsp:param name="mess" value="File Not Found"/>
</jsp:forward>
<%
}
%>

</body>
</html>

出现问题：
Description Resource Path Location Type
File cannot be resolved to a type readFile.jsp shiyan2(2)/WebRoot line 12 JSP Problem
File cannot be resolved to a type readFile.jsp shiyan2(2)/WebRoot line 12 JSP Problem
FileReader cannot be resolved to a type readFile.jsp shiyan2(2)/WebRoot line 16 JSP Problem
FileReader cannot be resolved to a type readFile.jsp shiyan2(2)/WebRoot line 16 JSP Problem

最佳答案

五星知识达人网友：狂恋
2021-01-22 12:48

在JSP中对于需要使用的类，都需要import。在JSP的上部通过指令标签page引入你使用的类。
<%@ page import="java.io.File"%>

全部回答

1楼网友：天凉才是好个秋
2021-01-22 12:53

<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%> <%@page import="java.io.FileReader"%> <html> <body bgcolor="#csd96"> This is readFile.jsp <% String s= request.getParameter("file"); java.io.File f=new java.io.File(s); if(f.exists()) { out.println(" 文件"+s+"的内容："); java.io.FileReader in=new java.io.FileReader(f); java.io.BufferedReader br=new java.io.BufferedReader(in); String line=null; while((line=br.readLine())!=null) { out.println(" "+line); } } else { %> <jsp:forward page="error.jsp"> <jsp:param name="mess" value="File Not Found"/> </jsp:forward> <% } %> </body> </html>

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