学步园

	private FilterConfig filterConfig;
	
	public void init(FilterConfig filterConfig) throws ServletException {
		// Put your code here
		this.filterConfig=filterConfig;
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		String encoding=this.filterConfig.getInitParameter("encoding");
		request.setCharacterEncoding(encoding);
		response.setContentType("text/html; charset=" + encoding);
		chain.doFilter(request, response);
	}

web.xml

	<!-- 编码过滤 -->
	<filter>
		 <filter-name>EncodingFilter</filter-name>
		 <filter-class>zyz.EncodingFilter</filter-class>
		 <init-param>
		 	<param-name>encoding</param-name>
		 	<param-value>utf-8</param-value>
		 </init-param>
	</filter>
	<filter-mapping>
		<filter-name>EncodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>