import com.xiaoleilu.hutool.io.FileUtil; import com.xiaoleilu.hutool.convert.Convert; import com.xiaoleilu.hutool.date.DateUtil; // 1. Read file content String content = FileUtil.readString("config.txt", "UTF-8"); // 2. Convert type Integer port = Convert.toInt(content.trim()); // 3. Get current time String now = DateUtil.now(); System.out.println("Started on port " + port + " at " + now); Use code with caution. Conclusion
You can import the entire bundle or select only the specific components your project requires.
This is the heart of the library. It provides easy ways to check, change, and move data. Helps you make perfect copies of objects in memory.
Java developers often have to write the same code over and over again. They spend hours dealing with files, dates, and text strings. Hutool solves this problem by packing lots of helpful tools into one small download. Hutool 3.9
Covers data conversion, file management, encryption, web operations, and more. Core Modules and Features in Hutool 3.9
Developers do not need to instantiate classes or handle verbose builders. Most actions require exactly one line of code.
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This is the exact problem solves. Described by its creators as a "toolkit that keeps Java sweet," Hutool is a comprehensive, self-contained Java utility library.
Prior to 3.9, Java developers relied heavily on Apache HttpClient or the verbose native HttpURLConnection . Hutool 3.9 refined its internal HTTP implementation, allowing for fluent chain calls without external dependencies.
Legacy utility libraries often contain outdated parsing mechanisms (especially within HTTP and JSON modules) that may be susceptible to edge-case security vulnerabilities like Denial of Service (DoS) via algorithmic complexity or unsafe deserialization. Get current time String now = DateUtil
Instead of forcing developers to write, test, and maintain their own helper methods for string manipulation, date parsing, or file I/O, Hutool provides highly optimized, well-tested static methods to handle these tasks out-of-the-box. Core Features That Streamline Java Development
// Checking for blank (null, spaces, empty) if (StrUtil.isBlank(userInput)) throw new IllegalArgumentException("Input required");
For teams utilizing Gradle, inject the following line directly into the application's build.gradle dependency block: implementation 'cn.hutool:hutool-all:3.9.0' Use code with caution. Best Practices and Performance Optimization