Solution to Chinese garbled characters using Ajax in Java

There is a garbled problem when Ajax uses the POST method to submit data to the Java background. Many requests are set on the server side on the Internet. setcharacterencoding ("UTF-8") to solve this problem or change all the front-end background encoding into a UTF-8, however, this method cannot be implemented in your own project (later analysis may be due to the use of the encoding filter ). After several days of exploration, I finally got it done:
1. the escape or encodeuri method is used for Ajax submission. Must be used twice
2. Java uses the decode method of the java.net. urldecoder class in the background.

Front-end Page code:
/**
* Marging is a JS object used to carry part of the page functions and parameters.
* XMLHTTP is the modified Ajax object, and the attribute paramstring is the parameter sent to the server in post mode.
* The front-end and back-end pages all adopt GBK encoding and use the encoding filter.
*/
XMLHTTP. paramstring = "mname =" + marging. mnames;
// The parameter is encoded with encodeuri twice
XMLHTTP. paramstring = encodeuri (XMLHTTP. paramstring );
XMLHTTP. paramstring = encodeuri (XMLHTTP. paramstring );
// Send a save request
VaR xmlreq = XMLHTTP. gettextbypost ("mailmerginged. jsp ");

Background Page code:
/**
* When the request. getparameter () function is called, The URI decoding process is automatically performed.
* Built-in decoding may cause garbled Characters During the call. After the URI is encoded twice, the request. getparameter () function
* The original information URI is encoded once. Use the controllable decoding function java.net. urldecoder. Decode ()
* The original correct information can be obtained.
*/
String mname = java.net. urldecoder. Decode (request. getparameter ("mname"), "UTF-8 ");