myfilter.java

一个简单的BBS论坛

package com.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;

public class MyFilter implements Filter {

	public void destroy() {
		// TODO 自动生成方法存根

	}

	public void doFilter(ServletRequest req, ServletResponse resp,
			FilterChain chain) throws IOException, ServletException {
		// TODO 自动生成方法存根
		
		//强制转换
		HttpServletRequest request = (HttpServletRequest)req;
		
		//获取客户端提交的方式
		String method = request.getMethod();
		
		if(method.equalsIgnoreCase("post"))
		{
			request.setCharacterEncoding("UTF-8");
		}
		
		resp.setContentType("text/html");
		resp.setCharacterEncoding("utf-8");
		
		//把控制权移交给下一个处理者
		chain.doFilter(req, resp);
		
	}

	public void init(FilterConfig arg0) throws ServletException {
		// TODO 自动生成方法存根

	}

}