setcharacterencodingfilter.java

这是本人曾经在公司里用的,内部开发框架,基于struts+hibernate今天分享给大家

package cn.bway.common;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

/**
 * @author Kson
 *
 */
public class SetCharacterEncodingFilter extends HttpServlet implements Filter {
	
	private static final long serialVersionUID = 1L;
	
	protected String encoding = null;
	
	protected FilterConfig filterConfig = null;
	
	protected boolean ignore = true;
	
	protected String contentType = null;
	
	public void destroy() {
		this.encoding = null;
		this.filterConfig = null;
	}
	
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		if (ignore || (request.getCharacterEncoding() == null)) {
			String encoding = selectEncoding(request);
			if (encoding != null) {
				request.setCharacterEncoding(encoding);
			}
		}
		chain.doFilter(request, response);
	}
	
	public void init(FilterConfig filterConfig) throws ServletException {
		this.filterConfig = filterConfig;
		this.encoding = filterConfig.getInitParameter("encoding");
		String value = filterConfig.getInitParameter("ignore");
		if (value == null) {
			this.ignore = true;
		} else if (value.equalsIgnoreCase("true")) {
			this.ignore = true;
		} else if (value.equalsIgnoreCase("yes")) {
			this.ignore = true;
		} else {
			this.ignore = false;
		}
	}
	
	protected String selectEncoding(ServletRequest request) {
		return (this.encoding);
	}
	
}