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【Java】 Filter过滤服务器编码

作者:AnyYangL / 发布于2015/1/12/ 459


	package cn.Filter;
	
	import java.io.IOException;
	import java.io.UnsupportedEncodingException;
	
	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;
	import javax.servlet.http.HttpServletRequestWrapper;
	import javax.servlet.http.HttpServletResponse;
	
	public class FilterEncoding implements Filter {
	 private FilterConfig fc;
	
	 public void destroy() {
	 // TODO Auto-generated method stub
	
	 }
	
	 public void doFilter(ServletRequest req, ServletResponse rep,
	 FilterChain chain) throws IOException, ServletException {
	 HttpServletRequest request = (HttpServletRequest) req;
	 HttpServletResponse response = (HttpServletResponse) rep;
	 //得到初始的encoding的值
	 String encoding = fc.getInitParameter("Encoding");
	 if (encoding == null)
	 encoding = "UTF-8";
	 request.setCharacterEncoding(encoding);
	 MyRequest mr=new MyRequest(request);
	 response.setCharacterEncoding(encoding);
	 response.setContentType("text/html;charset=" + encoding);
	 chain.doFilter(mr, response);
	 }
	
	 public void init(FilterConfig filterConfig) throws ServletException {
	 // TODO 初始化filterConfig對象
	
	 fc = filterConfig;
	 }
	
	}
	
	class MyRequest extends HttpServletRequestWrapper {
	
	 public MyRequest(HttpServletRequest request) {
	 super(request);
	 }
	
	 @Override
	 public String getParameter(String name) {
	 String value = super.getParameter(name);
	 if (value == null) {
	 return null;
	 }
	 String encoding=super.getCharacterEncoding();
	 //get方式提交上来的话。
	 if ("get".equalsIgnoreCase(this.getMethod())) {
	 try {
	 byte[] b = value.getBytes("ISO-8859-1");
	 value = new String(b, encoding);
	 System.out.println(value);
	 } catch (Exception e) {
	 // TODO Auto-generated catch block
	 e.printStackTrace();
	 }
	 }
	 return value;
	 }
	
	}

试试其它关键字

　Filter　　过滤服务器　

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.Filter过滤服务器编码