如何使用正则表达式从 JSON 中提取下载链接？

Question

I'm trying to create a plugin for JDownloader, but I can't get the final link to begin the download.

After I send a POST with the link I want to download, the host sends me this response:

{"error":"0","link":"http:\/\/originalhost.net\/file\/ba0jf5t8","type":"2","name":"test.zip","size":"5 MB","date":"31\/12\/2017 15:56","until":"31\/12\/2018 15:56","download":"http:\/\/beta.generatedlink.net\/originalhost\/randomuuid\/test.zip","password":""}

and I want to use Regex to extract only:

http://beta.generatedlink.net/originalhost/randomuuid/test.zip

I have tried some examples I found online but I couldn't get to work

How can I do this?

Answer 1

This gets value for given key.

String jsonData = "" // fill it with your data
String pattern = "(?:\"download\":\")(.*?)(?:\")"; // download is key
Pattern r = Pattern.compile(pattern);
Matcher m = r.matcher(jsonData);
if (m.find()) {
    System.out.println("Found value: " + m.group(0));
} else {
    System.out.println("NO MATCH");
}