Jsp read address bar parameters

/*
Analysis: When the request. getParameter () function is called, the URI decoding process is automatically performed,
The built-in decoding process during the call may cause garbled characters.
After URI encoding twice, the request. getParameter () function obtains the content encoded once by the original information URI.
You can use the controllable decoding function java.net. URLDecoder. decode () to obtain the original correct information.
*/

Jsp read address bar parameters

Var params = encodeURI ("method = post & filed = hit & keyword =" + keyword ));
CreateXMLHttpRequest ();
Var url = "search. do ";
XmlHttp. onreadystatechange = handleStateChange;
XmlHttp. open ("POST", url, true );
XmlHttp. setRequestHeader ("content-length", params. length );
XmlHttp. setRequestHeader ('content-type', 'application/x-www-form-urlencoded ');
XmlHttp. setRequestHeader ("Connection", "close ");
XmlHttp. send (params );

Server code:

Response. setContentType ("text/html; charset = gb2312 ");
// When ajax post is passed, it must be UTF-8 encoded. You can set the url by yourself.
String keyword = URLDecoder. decode (String) request. getParameter ("keyword"), "UTF-8 ");