j2ee的中文问题
<%@ page language="java" import="java.util.*" pageEncoding="GB18030" contentType="text/html; charset=gbk"%>
<html>
<body>
<center>
<form action="test.do">
<input type="submit" value="提交">
</form>
</center>
</body>
</html>
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)throws IOException {
System.out.println(request.getCharacterEncoding());
System.out.println(response.getCharacterEncoding());
PrintWriter out=response.getWriter();
out.println("<script type='text/javascript'>alert('欢迎您！');history.back();</script>");
return null;
}
为什么打印出来是：
null
ISO-8859-1
System.out.println(request.getCharacterEncoding());打印是空的为什么？
System.out.println(response.getCharacterEncoding());打印出来的不是gbk吗？
设了contentType="text/html; charset=gbk"，为什么在页面上alert();会出现乱码？