Filter 过滤编码

Encoding filter Demo

java

package com.suypower.chengyu.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class EncodingTest implements Filter{
	public void init(FilterConfig filter)
	{
		System.out.println("**过滤器初始化**");
	}
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
	throws IOException
	{
		try
		{
			request.setCharacterEncoding("gbk");
			chain.doFilter(request, response);
		}catch(Exception e){e.getMessage();}

	}
	public void destroy()
	{
		System.out.println("**过滤器销毁**");
	}
}

web.xml

	<filter>
		<filter-name>encoding</filter-name>
		<filter-class>com.suypower.chengyu.filter.EncodingTest</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>encoding</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

html

<form action="JBDemo03.jsp" method="post">
用户名：<input type="text" name="name"><br>
密&nbsp;&nbsp;码：<input type="text" name="password"><br>
<input type="submit" value="提交">
<input type="reset" value="重置">
</form>

jsp

<%@page contentType="text/html;charset=gbk" %>
<jsp:useBean id="sb" class="cn.mldn.lxh.SimpleBean" scope="page"></jsp:useBean>
<!--
<%
	sb.setName(request.getParameter("name"));
	sb.setPassword(request.getParameter("password"));
	sb.setName("李兴华") ;
	sb.setPassword("zzzzzz") ;
	sb.setPassword(request.getParameter("password"));
%>
-->
<!--使用下面JAVABEAN 可以替代一切Setter 方法调用 * 自动匹配 -->
<jsp:setProperty property="*" name="sb"/>

<h1>姓名：<%=sb.getName()%></h1>
<h1>密码：<%=sb.getPassword()%></h1>
<h2>
<%=request.getParameter("name") %>
</h2>