public static void main(String[] args) {
String url="http://www.oicp.net:34919/b2b2c/attachment/ueditor/2017/7/5/19//23077526.jpg";
if(url.contains("http:/")){
int head = url.indexOf("http:/");
int end = url.indexOf("attachement");
url=url.replaceAll("http://.+?attachment", "fs:/attachment");
System.out.println(url);
}
}