tomcat default character encoding

in default Tomcat request, we can get null from request.getCharacterEncoding().

what's the default value from Tomcat?

the default value is ISO-8859-1, now we start to trace this path!!

reference:
http://www.docjar.com/html/api/org/apache/catalina/connector/Request.java.html

in method parseParameters():



 2496      protected void parseParameters() {
 2497
 2498           parametersParsed = true;
 2499
 2500           Parameters parameters = coyoteRequest.getParameters();
 2501
 2502           // getCharacterEncoding() may have been overridden to search for
 2503           // hidden form field containing request encoding
 2504           String enc = getCharacterEncoding();
 2505
 2506           boolean useBodyEncodingForURI = connector.getUseBodyEncodingForURI();
 2507           if (enc != null) {
 2508               parameters.setEncoding(enc);
 2509               if (useBodyEncodingForURI) {
 2510                   parameters.setQueryStringEncoding(enc);
 2511               }
 2512           } else {
 2513               parameters.setEncoding
 2514                   (org.apache.coyote.Constants.DEFAULT_CHARACTER_ENCODING);
 2515               if (useBodyEncodingForURI) {
 2516                   parameters.setQueryStringEncoding
 2517                       (org.apache.coyote.Constants.DEFAULT_CHARACTER_ENCODING);
 2518               }
 2519           }



if we don't add any configuration in /conf/server.xml, it will use default value.

==>

reference:
http://www.docjar.com/html/api/org/apache/coyote/Constants.java.html



the constant:
   27   public final class Constants {
   28
   29
   30       // -------------------------------------------------------------- Constants
   31
   32
   33       public static final String DEFAULT_CHARACTER_ENCODING="ISO-8859-1";



shows the default value for Tomcat character encoding!!

if you wanna change setting in server.xml, pls refer to https://confluence.atlassian.com/display/DOC/Configuring+Tomcat's+URI+encoding.