setcharacterencodingfilter.java

Spring2+Hibernate3+struts2实现的图书管理系统

package com.sterning.commons;


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 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
	{
		// TODO 自动生成方法存根
		if (ignore || (request.getCharacterEncoding() == null))
		{
			String encoding = selectEncoding( request );
			if (encoding != null)
				request.setCharacterEncoding( encoding );
		}
		chain.doFilter( request, response );
	}

	public void destroy()
	{
		// TODO 自动生成方法存根
		this.encoding = null;
		this.filterConfig = null;
	}

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