Java过滤器过滤特殊字符

 

package util;

import java.io.IOException;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;

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 StringFilter implements Filter {

 public void destroy() {
  // TODO Auto-generated method stub
  
 }

 public void doFilter(ServletRequest arg0, ServletResponse arg1,
   FilterChain arg2) throws IOException, ServletException {
 //非法字符过滤
  HttpServletRequest request=(HttpServletRequest)arg0;
  Map map=request.getParameterMap();
  Collection coll= map.values();
  for (Iterator iterator = coll.iterator(); iterator.hasNext();) {
   String[] s = (String[]) iterator.next();
   for (int i = 0; i < s.length; i++) {
    s[i]=s[i].replaceAll("日本", "**");//Pattern
    s[i]=s[i].replaceAll("<", "<");
    s[i]=s[i].replaceAll(">", ">");

     //根据自己的需求去处理特殊字符
   }
  }
  //放行
  arg2.doFilter(arg0, arg1);
  
 }

 public void init(FilterConfig arg0) throws ServletException {
  // TODO Auto-generated method stub
  
 }

}

同时告诉做程序的也可以赚点外快，想我这样：http://t.cn/zOyltbx