자바 웹 필터 의 응용 으로 난 코드 문 제 를 해결 합 니 다.

import java.io.IOException;
import java.io.UnsupportedEncodingException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;

public class AllCharacterFilter implements Filter {

	private FilterConfig filterConfig;

	public void init(FilterConfig filterConfig) throws ServletException {
           this.filterConfig = filterConfig;
	}

	public void doFilter(ServletRequest req, ServletResponse resp,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest)req;
		HttpServletResponse response = (HttpServletResponse)resp;
		//          
		String encoding = filterConfig.getInitParameter("encoding");
	   //    
		request.setCharacterEncoding(encoding);
		response.setCharacterEncoding(encoding);
		response.setContentType("text/html;charset="+encoding);
		//          getParameter  
		MyHttpServletRequest mrequest = new  MyHttpServletRequest(request);
		
		//  
		chain.doFilter(mrequest, response);

	}

	public void destroy() {

	}

}

class MyHttpServletRequest extends HttpServletRequestWrapper
{

	public MyHttpServletRequest(HttpServletRequest request) {
		super(request);
	}
  //    
	public String getParameter(String name) {
		String value = super.getParameter(name);
		if(value == null)
			return value;
		String method = super.getMethod();
		if("get".equalsIgnoreCase(method))//     
		{
			try {
				value = new String(value.getBytes("ISO-8859-1"),super.getCharacterEncoding());
			} catch (UnsupportedEncodingException e) {
				e.printStackTrace();
			}
		}
		return value;
	}

}