Best practices for encoding issue

1 Always use UTF-8 as encoding;
2 Try to set the encoding uniformly(in filter or web server side);
  2.1 In tomcat6,
      2.1.1 For get method, you may set encoding by adding URIEncoding cfg option in server.xml:
      <Connector connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443" URIEncoding="UTF-8"/>
      2.1.2 For post method, you can only set encoding by request.setCharacterEncoding in your filter(Don't call any request.getParameter before request.setCharacterEncoding, or request.setCharacterEncoding will not take effect).
  2.2 In weblogic 10.3, you may set encoding in 2 ways:
      2.2.1 In filter, request.setCharacterEncoding will set the encoding for both post method and get method;
      2.2.2 In weblogic.xml, the following setting will set the encoding for both post method and get method:
       <wls:charset-params>
            <wls:input-charset>
                  <wls:resource-path>/cvsearch/*</wls:resource-path>
                  <wls:java-charset-name>UTF-8</wls:java-charset-name>
            </wls:input-charset>
        </wls:charset-params>
3 In servlet, set the encoding of response before sending result to client:  response.setContentType("text/javascript; charset=UTF-8");
4 In jsp page, set the charset attribute of contentType to UTF-8: <%@page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

Some more scenario for encoding:
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1) String.getBytes()
String s = "a";
s.getBytes("UTF-8");
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2) jstl core import
<c:import url="/ajax/topMover_CDS_getAxisSeries.action" charEncoding="UTF-8"/>
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3) InputStreamReader
InputStream is = this.getClass().getClassLoader().getResourceAsStream(fileName); 
BufferedReader br = new BufferedReader(new InputStreamReader(is, "utf-8"));