This paper examines the release and subsequent "download fixed" update for Hutool version 26, a popular Java utility library. It summarizes the issue that necessitated the fix, analyzes technical root causes, assesses the impact on developers and build systems, details the fixes applied, and provides recommendations for dependency management, verification, and mitigation strategies to prevent similar incidents.
Run your build with the "update snapshots/releases" flag to force Maven/Gradle to re-download from Central.
Maven:
mvn clean compile -U
Gradle:
gradle build --refresh-dependencies
Add this to your build.gradle file:
implementation 'cn.hutool:hutool-all:5.8.25'
Now that the download is fixed, why should you care about version 26? Here is what was worth the pain:
Before we dive into the fix, let's diagnose the problem. Hutool, maintained by the prolific developer Looly (Duan), released two major tracks hitting version "26": hutool 26 download fixed
Users reported three distinct failure modes:
Even with the correct links, developers report errors. Here is the troubleshooting checklist:
| Error Message | The Real Problem | The Fix |
| :--- | :--- | :--- |
| PKIX path building failed | Corporate firewall blocking raw GitHub | Download JAR manually via browser and install locally (mvn install:install-file) |
| Missing class cn.hutool.core.convert.Convert | You imported cn.hutool but downloaded com.xiaoleilu | Change your import statements to import com.xiaoleilu.hutool.convert.Convert; |
| NoSuchMethodError: toStr | Version collision (another lib pulled modern Hutool) | Use Maven Shade plugin or enforce com.xiaoleilu in your dependency tree |
| Downloaded file has extension 'pom' instead of 'jar' | The mirror replaced the binary with the metadata | Use the direct RAW GitHub URL (Method 1 above) | This paper examines the release and subsequent "download
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>2.6.0</version>
</dependency>
Thanks to everyone who reported the issue. We apologize for any inconvenience caused.
Note: Hutool 2.6 is a legacy version. For new projects, we strongly recommend using the latest stable release (5.x or higher). However, this fix ensures that legacy systems depending on 2.6 can continue to build reliably.
The search for "hutool 26 download fixed" typically points to either the HU-TOOL 2.6 BMW FSC code generator for vehicle navigation updates or version 5.8.26 of the Hutool Java utility library, which includes bug fixes for JSON and HTTP modules. The Java library version 5.8.26 is available via the Maven Central Repository. Detailed documentation for the Java library can be found at Hutool Documentation hutool-core » 5.8.26 - Maven Repository Gradle: gradle build --refresh-dependencies