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;
    }