Hutool 39 File

Hutool includes its own fast JSON parser. It is often preferred for simple tasks over Jackson or Gson due to its ease of use.

import cn.hutool.json.JSONUtil;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONArray;
// 1. Parse String
JSONObject json = JSONUtil.parseObj("\"name\": \"Hutool\", \"version\": 5.8");
// 2. Get values
String name = json.getStr("name");
double version = json.getDouble("version");
// 3. Object to JSON (Serialization)
User user = new User("Admin", 25);
String jsonStr = JSONUtil.toJsonStr(user);

int randInt = RandomUtil.randomInt(1, 100);
String uuid = RandomUtil.randomUUID();
String numbers = RandomUtil.randomNumbers(6);

// Read file as string
String content = FileUtil.readUtf8String("test.txt");
// Write
FileUtil.writeUtf8String("content", "test.txt"); hutool 39
// Copy/Move
FileUtil.copy("src", "dest", true);
 Hutool includes its own fast JSON parser

String ip = ServletUtil.getClientIP(request);