setcharacterencodingfilter.java

struts+spring+jdbc权限管理 菜单树实现

package com.hiiso.crm.common.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;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/*************************************************************************
* SYSTEM:       基金CRM系统
* SUBSYS:       CRM权限管理模块
* DESCRIPTION:  CRM过滤器，解决乱码
* AUTHOR:       yaoyi
* CREATE DATE:  2008/11/06
* COPYRIGHT:    (c)Copyright 2008 hisun Corporation. All rights reserved.
* VERSION:      V1.0G
* EDIT HISTORY:
*************************************************************************/

public class SetCharacterEncodingFilter implements Filter {
	protected String encoding = null;
	protected FilterConfig filterConfig = null;
	protected boolean ignore = true;

	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
			this.ignore = false;
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest hreq = (HttpServletRequest)request;
		HttpServletResponse hres = (HttpServletResponse)response;
		if (ignore || (request.getCharacterEncoding() == null)) {
			String encoding = selectEncoding(request);
			if (encoding != null)
				hreq.setCharacterEncoding(encoding);
		}
		chain.doFilter(hreq, hres);
		if (ignore || (response.getCharacterEncoding() == null)) {
			String encoding = responseEncoding(response);
			if (encoding != null)
				hres.setCharacterEncoding(encoding);
		}
	}

	public void destroy() {
		this.encoding = null;
		this.filterConfig = null;
	}

	protected String selectEncoding(ServletRequest request) {
		return (this.encoding);
	}
	
	protected String responseEncoding(ServletResponse response) {
		return (this.encoding);
	}
}