介绍下hutool这个工具，分别以1，2，3等等列举全部功能

Sure, here are some of the main features of Hutool:

1. String manipulation: Hutool provides a variety of string manipulation methods such as converting between different character sets, formatting strings, and searching for substrings.
2. Date and time manipulation: Hutool simplifies the handling of dates and times in Java by providing a range of useful methods for formatting, parsing, and calculating dates and times.
3. File and IO operations: Hutool provides a set of utility classes for working with files and IO operations, such as reading and writing files, creating directories, and copying files.
4. Network operations: Hutool provides a set of utility classes for working with network operations, such as sending HTTP requests, working with URLs, and parsing URLs.
5. Encryption and decryption: Hutool provides a set of utility classes for working with encryption and decryption, such as MD5 hashing, Base64 encoding and decoding, and AES encryption and decryption.
6. XML parsing: Hutool provides a set of utility classes for working with XML files, such as parsing XML files, creating XML files, and transforming XML data.
7. JSON parsing: Hutool provides a set of utility classes for working with JSON data, such as parsing JSON data, creating JSON data, and manipulating JSON objects.
8. Excel operations: Hutool provides a set of utility classes for working with Excel files, such as reading and writing Excel files, manipulating Excel data, and formatting Excel cells.
9. Image processing: Hutool provides a set of utility classes for working with images, such as resizing images, cropping images, and adding watermarks to images.
10. Collection manipulation: Hutool provides a variety of utility classes for working with collections, such as sorting collections, filtering collections, and transforming collections.

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