package tutorial.struts.filter;

import javax.servlet.Filter;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;
import javax.servlet.FilterChain;
import java.io.IOException;

public class SetCharacterEncodingFilter implements Filter {

  protected Filter Config filterConfig;
  protected String encodingName;
  protected boolean enable;

  public SetCharacterEncodingFilter() {
    this .encodingName = "UTF-8";
    this .enable = false ;
  }

  public void init(FilterConfig filterConfig) throws Servlet Exception {
    this .filterConfig = filterConfig;
    loadConfigParams();
  }

  private void loadConfigParams() {
    //encoding

     this .encodingName = this .filterConfig.getInitParameter("encoding");
    // filter enable flag...

    String strIgnoreFlag = this .filterConfig.getInitParameter("enable");
    if (strIgnoreFlag.equalsIgnoreCase("true")) {
      this .enable = true ;
    } else {
      this .enable = false ;
    }
  }

  public void doFilter(ServletRequest request, ServletResponse response,
                       FilterChain chain) throws IOException, ServletException {
    if ( this .enable) {
      request.setCharacterEncoding( this .encodingName);
    }
    chain.doFilter(request, response);
  }

  public void destroy() {
  }
                
}

  < filter >

    < filter -name > Set Character Encoding </< span> filter -name >

    < filter -class > tutorial.struts.filter.SetCharacterEncodingFilter </< span> filter -class >

    < init-param >

      < param-name > encoding </< span> param-name >

      < param-value > UTF-8 </< span> param-value >

    </< span> init-param >

    < init-param >

      < param-name > enable </< span> param-name >

      < param-value > true </< span> param-value >

    </< span> init-param >

  </< span> filter >

  < filter -mapping >

    < filter -name > Set Character Encoding </< span> filter -name >

    < servlet -name > Action Servlet </< span> servlet -name >

  </< span> filter -mapping >

  < filter -mapping >

    < filter -name > Set Character Encoding </< span> filter -name >

    < servlet -name > Faces Servlet </< span> servlet -name >

  </< span> filter -mapping >