HTTP response and requested encoding problem __ code

the encoding in the 1.HttpServletRequest request is consistent

Using HTML form <form> submitting data to the server, obtaining parameter values through Request.getparameter (key) in the servlet, because the default character encoding for HTTP requests is iso-8859-1, A character encoding conversion is required after the parameter value is obtained. e.g.

HTML form:

<form action= "/testpro/servlet/checkservlet" >

Input: <input type= "text" name= "name"/>

<input type= "Submit"/>

</form>

Checkservlet:

String name = Request.getparameter ("name");

String Name_u = new String (Name.getbytes ("iso-8859-1"), "Utf-8");

"Note" here is the encoding format that is converted to Utf-8 because the <form> form's encoded format is utf-8. In the

<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 ">

Of course, the charset can also be designated as GB2312, at the same time in the request to obtain parameters, after the conversion of the encoding format is also GB2312, otherwise there will be garbled.

encoding in the 2.HttpServletResponse response

There are two ways to respond to Brower, one is OutputStream byte HttpServletResponse, and two are printwriter character streams.

2.1 OutputStream Byte stream (Byte stream encoding format is consistent with ContentType encoding format)

Response.getoutputstream (). Write ("unrestrained". GetBytes ("Utf-8"));

Response.setcontenttype ("Text/html;charset=utf-8");

You can also use the following two different ways

Response.setheader ("Content-type", "text/html;charset=utf-8");

Or

Response.setcontenttype ("text/html");

Response.setcharacterencoding ("Utf-8");

2.2 PrintWriter character stream (just specify the encoding format for contenttype)

Response.setcontenttype ("text/html;charset=gb2312");

PrintWriter out = Response.getwriter ();

Out.println ("unrestrained");

Out.write ("unrestrained"); Two ways of outputting the same effect