Hutool常用方法的示例：

• 文件操作

File file = FileUtil.file("d:/test.txt");
FileWriter writer = new FileWriter(file);
writer.write("Hello World!");
writer.close();

• 加密解密

String plainText = "Hello World!";
String key = "myKey";
CryptoUtil.md5Hex(plainText, key);

• 数据库操作

Db db = Db.use().queryOne("select * from user where id=?", 1);

• 日期时间操作

Date now = DateUtil.date();
Date tomorrow = DateUtil.offsetDay(now, 1);

• 网络操作

NetUtil.getResponse(url);

• 字符串操作

StrUtil.format("{} {}", "hello", "world"); // "hello world"