java截取url中的值

    Map<String, Object> urlSplit(String data){
         StringBuffer strbuf = new StringBuffer();
         StringBuffer strbuf2 = new StringBuffer();
         Map<String ,Object> map = new HashMap<String,Object>();
         for(int i =0;i<data.length();i++){
 
             if(data.substring(i,i+1).equals("=")){
 
                 for(int n=i+1;n<data.length();n++){
                     if(data.substring(n,n+1).equals("&")|| n ==data.length()-1){
                         map.put(strbuf.toString(), strbuf2);
                         strbuf =new  StringBuffer("");
                         strbuf2 =new  StringBuffer("");
                         i=n;
                         break;
                     }
                     strbuf2.append(data.substring(n,n+1));
                 }
                 continue;
             }
             strbuf.append(data.substring(i,i+1));
         }
 
         return map;
     }