filterall.java

JPetStore源码

/*
 * Created on 2008-6-4
 * 
 * TODO To change the template for this generated file go to Window -
 * Preferences - Java - Code Style - Code Templates
 */
package org.springframework.samples.jpetstore.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 FilterAll 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 if (value.equalsIgnoreCase("yes"))
		   this.ignore = true;
		else
		   this.ignore = false;
	}
	
	protected String selectEncoding(ServletRequest request) {
		return (this.encoding);
	}

   
	public void doFilter(ServletRequest request, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		//System.out.println("filter");
		if (ignore || (request.getCharacterEncoding() == null)) {
			   String encoding = selectEncoding(request);
			   if (encoding != null){
				   request.setCharacterEncoding(encoding);
				   arg1.setCharacterEncoding(encoding);
			   }
		}
		arg2.doFilter(request, arg1);
	}

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