解决java页面URL地址传输参数乱码的方法

<Connector port="8080" protocol="HTTP/1.1"
  
connectionTimeout="20000" redirectPort="8443" URIEncoding="GBK" />

String username = request.getParameter("userName");
  
try {
   
  username = new String(username.getBytes("iso-8859-1"), "GBK");
   
} 
catch (UnsupportedEncodingException e1) {
   
  e1.printStackTrace();
   
}