请达人们近。。。。

Question

[code="java"]
public ActionForward updateparavalue(ActionMapping mapping,
ActionForm actionfrom, HttpServletRequest request,
HttpServletResponse response) {
String nid=request.getParameter("n_id");
Integer n_id=new Integer(Integer.parseInt(nid));
String paravalue=request.getParameter("paravalue");
String reasons=request.getParameter("msg");
int sucess= uplandataimpl.updatebyfactor(n_id, paravalue,reasons);
PrintWriter pw=null;
try {
pw=response.getWriter();
} catch (IOException e1) {
e1.printStackTrace();
}
// response.reset();
// response.setContentType("text/xml;charset=utf-8");
if(sucess>0)
{
pw.print("chenggong");
}else
{
pw.print("shibai");
}
//pw.close();
return null;
}
[/code]
我在jsp中 alert()输出我print的信息 却是<?xml version="1.0" encoding="GBK"?>

Answer 1

PrintWriter 是自动带缓存的，你必须flush()一下或close()后，才会真正写入流，