I have a question about JSP,I put some Java code into JSP,it like follows:
<%@page language="java"%>
<%@page import="java.io.*" %>
<html>
<head>
<title>test</title>
</head>
<body background="images/send.jpg" text="FF0000">
<%
String value[]=new String[2];
String str;
value[0]="8";
try
{
InputStream is = this.getClass().getResourceAsStream("version.data");
BufferedReader input = new BufferedReader(new InputStreamReader(is));
str=input.readLine();
}
catch(IOException e)
{
System.out.println("read file error");
}
%>
....
</body>
</html>
when I run it,it raise errors:
Description:
The server encountered an internal error (Internal Server Error) that prevented it
from fulfilling this request
exception:
java.lang.NullPointerException
at java.io.Reader.(Reader.java:61)
at java.io.InputStreamReader.(InputStreamReader.java:55)
at org.apache.jsp.start_0005fsend$jsp._jspService(start_0005fsend$jsp.java:75)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
Then I extract my Java code,and put it into Java file,like follows:
import java.io.*;
public class test8
{
public static void main(String args[])
{
test8 ss=new test8();
ss.pp();
}
public void pp()
{
String value[]=new String[2];
String str;
value[0]="8";
try
{
InputStream is = this.getClass().getResourceAsStream("version.data");
BufferedReader input = new BufferedReader(new InputStreamReader(is));
str=input.readLine();
System.out.println(str);
}
catch(IOException e)
{
System.out.println("read file error");
}
}
}
It run ok.Why my code can't run in JSP and can run in Java? How to correct to make my
Java code run in JSP?
Thanks in advance!
Edward
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