jar中META-INF

最新推荐文章于 2025-12-28 16:49:38 发布

转载最新推荐文章于 2025-12-28 16:49:38 发布 · 79 阅读

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原文链接：http://www.cnblogs.com/zhjh256/p/6918862.html

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#java

本文详细介绍了Java应用程序中META-INF目录的作用及其包含的主要文件，如MANIFEST.MF、INDEX.LIST等，并解释了这些文件如何帮助配置应用程序、扩展、类加载器和服务。

一直记得META-INF中只有在直接启动jar可执行文件时需要在manifest中配置启动类，最近看dubbo的配置，发现dubbo的配置都丢在META-INF下，特地搜索了下，官网对于META-INF的说明如下：

The META-INF directory

The following files/directories in the META-INF directory are recognized and interpreted by the Java 2 Platform to configure applications, extensions, class loaders and services:

MANIFEST.MF

The manifest file that is used to define extension and package related data.

INDEX.LIST

This file is generated by the new "-i" option of the jar tool, which contains location information for packages defined in an application or extension. It is part of the JarIndex implementation and used by class loaders to speed up their class loading process.

x.SF

The signature file for the JAR file. 'x' stands for the base file name.

x.DSA

The signature block file associated with the signature file with the same base file name. This file stores the digital signature of the corresponding signature file.