1.HTML编码解码URL替换--代码整理

 public class HtmlCode {

     public static String encode(String str){

         String    s    =    "";
         if    (str.length()    ==    0)    return    "";
         s    =    str.replaceAll("&",    "&");
         s    =    s.replaceAll("<",        "&lt;");
         s    =    s.replaceAll(">",        "&gt;");
         s    =    s.replaceAll("\'",      "'");
         s    =    s.replaceAll("\"",      "&quot;");
         return    s;
     }

     public static String decode(String str){

         String    s    =    "";
         if    (str.length()    ==    0)    return    "";
         s    =    str.replaceAll("&amp;",    "&");
         s    =    s.replaceAll("&lt;",        "<");
         s    =    s.replaceAll("&gt;",        ">");
         s    =    s.replaceAll("'",      "\'");
         s    =    s.replaceAll("&quot;",      "\"");
         return    s;
     }
     public static String url(String str){
         return str.replace("$param$", "?").replace("$and$", "&").replace("$percent$", "%");
     }
     public static String replaceHtml(String html){
         String regEx="<.+?>"; //表示标签
         Pattern p=Pattern.compile(regEx);
         Matcher m=p.matcher(html);
         String s=m.replaceAll("");
         return s;
     }
 }