哪里错了？

[snow2003]

部分源吗：
<%!
String stusub1 = "";
String stusub2 = "";
ResultSet rs1 = null;
int id2=Integer.parseInt(request.getQueryString("id"));
%>
<%
try{
rs1= workM.executeQuery("select id,sub1,sub2 from student where id="+id2+"");
while(rs1.next())
{
stusub1=rs1.getString("sub1");
stusub2=rs1.getString("sub2");
//stusub1=workc.convert(stusub1);
//stusub2=workc.convert(stusub2);
}}
catch(Exception ex){
out.print(ex.getMessage());
}
finally{
workM.disconnectToDB();
}
%>
报错内容：
Generated servlet error:
[javac] Since fork is true, ignoring compiler setting.
[javac] Compiling 1 source file
[javac] Since fork is true, ignoring compiler setting.
[javac] D:\Tomcat 4\work\Standalone\localhost\test\online\stuselect_jsp.java:16: cannot resolve symbol
[javac] symbol : variable request
[javac] location: class org.apache.jsp.stuselect_jsp
[javac] int id2=Integer.parseInt(request.getQueryString("id"));
[javac] ^
[javac] 1 error

[liuflei3139]

request对象是jsp默认的一个对象，它是在调用了_jspService方法以后被创建的。而<%!...>中的代码是放在_jspInit()中的。_jspInit是jsp生命周期中第一个被调用的方法。
在你的代码中，使用request的时候（_jspInit中）这个对象还没有创建。你应该这么改:


<%!
String stusub1 = "";
String stusub2 = "";
ResultSet rs1 = null;
int id2；// change
%>


<%
id2 = Integer.parseInt(request.getQueryString("id"));//change

try{
rs1= workM.executeQuery("select id,sub1,sub2 from student where id="+id2+"");
while(rs1.next())
{
stusub1=rs1.getString("sub1");
stusub2=rs1.getString("sub2");
//stusub1=workc.convert(stusub1);
//stusub2=workc.convert(stusub2);
}}
catch(Exception ex){
out.print(ex.getMessage());
}
finally{
workM.disconnectToDB();
}
%>