UTF8EncodingFilter


1   package org.contineo.core.util;
2   
3   import java.io.IOException  ;
4   
5   import javax.servlet.FilterChain  ;
6   import javax.servlet.FilterConfig  ;
7   import javax.servlet.ServletException  ;
8   import javax.servlet.ServletRequest  ;
9   import javax.servlet.ServletResponse  ;
10  
11  /**
12   * Created on 10.01.2005
13   */
14  public class UTF8EncodingFilter implements javax.servlet.Filter   {
15      
16        public void init(FilterConfig   filterConfig)  throws ServletException   {
17           // This would be a good place to collect a parameterized
18           // default encoding type.  For brevity, we're going to
19           // use a hard-coded value in this example.
20        }
21  
22        public void doFilter( ServletRequest   request,
23                              ServletResponse   response,
24                              FilterChain   filterChain )
25                                       throws IOException  , ServletException   {
26           // Wrap the response object.  You should create a mechanism
27           // to ensure the response object only gets wrapped once.
28           // In this example, the response object will inappropriately
29           // get wrapped multiple times during a forward.
30           //response = new UTF8EncodingServletResponse( (HttpServletResponse) response );
31          
32           // Specify the encoding to assume for the request so
33           // the parameters can be properly decoded/.
34           request.setCharacterEncoding( "UTF-8" );
35          
36           filterChain.doFilter( request, response );
37        }
38  
39        public void destroy() {
40           // no-op
41        }
42  
43  }
44

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