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EncodingFilter.java

----------- web.xml 설정 -------------------------------

<filter>
  <filter-name>encodingFilter</filter-name>
  <filter-class>struts.filter.EncodingFilter</filter-class>
  <init-param>
   <param-name>encoding</param-name>
   <param-value>euc-kr</param-value>

  </init-param>
 </filter>
 <filter-mapping>
  <filter-name>encodingFilter</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>
------------- 필터링 소스 ----------------------------------
package struts.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class EncodingFilter implements Filter {
 private String encoding = null;

 protected FilterConfig filterConfig = null;

 
 public void destroy() {

  this.encoding = null;
  this.filterConfig = null;

 }

 /**
  * ServletRequest객체에 web.xml에서 전달된 인코딩을 설정하는 메써드.
  */
 public void doFilter(
   ServletRequest request,
   ServletResponse response,
   FilterChain chain)
 throws IOException, ServletException {

  if (request.getCharacterEncoding() == null) {
   if (encoding != null) {
    request.setCharacterEncoding(encoding);
   }
  }

  chain.doFilter(request, response);
  System.out.println("필터 기능 사용");
 }

 /**
  * web.xml에서 전달된 인코딩 값을 초기화하는 메써드.
 
  *Filter 객체생성후 바로 호출되는 메소드
  *-web.xml의 파라메타 데이터를 읽어온다.  
 
 
  */
 public void init(FilterConfig filterConfig) throws ServletException {
  this.filterConfig = filterConfig;
  /* <filter-name>
  encodingFilter
 </filter-name>
  <filter-class>
  struts.util.EncodingFilter
  </filter-class>
  <init-param>
   <param-name>encoSding</param-name>
   <param-value>euc-kr</param-value>
  
  </init-param>
 </filter>*/

  this.encoding = filterConfig.getInitParameter("encoding");
 }

 public FilterConfig getFilterConfig() {
  return filterConfig;
 }

 public void setFilterConfig(FilterConfig cfg) {
  filterConfig = cfg;
  
 
 }
}