标签：des style blog http io ar color os sp
该，该，该.......，继之前说到的 Filter 现在用这个来做一个小小的应用----------》 铛,铛,铛,铛..... ->_-> <丑逼的留言板>
要求：
----------没错，就是这样丑逼：
然后就是一个代码：（JSP部分）
web.xml 文件部分
Servlet 类：
Filter 类：
1 package Demo; 2 3 import java.io.IOException; 4 5 import javax.servlet.Filter; 6 import javax.servlet.FilterChain; 7 import javax.servlet.FilterConfig; 8 import javax.servlet.ServletException; 9 import javax.servlet.ServletRequest; 10 import javax.servlet.ServletResponse; 11 import javax.servlet.http.HttpServletRequest; 12 import javax.servlet.http.HttpServletResponse; 13 14 public class Liuyanban implements Filter { 15 16 @Override 17 public void destroy() { 18 // TODO Auto-generated method stub 19 20 } 21 22 @Override 23 public void doFilter(ServletRequest request, ServletResponse response, 24 FilterChain chain) throws IOException, ServletException { 25 // TODO Auto-generated method stub 26 27 HttpServletRequest req = (HttpServletRequest)request ; 28 HttpServletResponse resp =(HttpServletResponse) response ; 29 String username = req.getParameter("username"); 30 String comment = req.getParameter("comment"); 31 username=username.replace("zhang","gong"); 32 comment=comment.replace("animal","****"); 33 req.setAttribute("username",username); 34 req.setAttribute("comment",comment); 35 chain.doFilter(request,response); 36 37 } 38 39 @Override 40 public void init(FilterConfig filterConfig) throws ServletException { 41 // TODO Auto-generated method stub 42 43 } 44 45 }
然后显示结果：（ Result.jsp ）
最终的效果为：
Servlet的尾(yi)巴---filter ( 过滤器 )的小应用
标签：des style blog http io ar color os sp
原文地址：http://www.cnblogs.com/gongxijun/p/4160587.html
