jar 中的 MANIFEST.MF 有问题

发布于 2024-10-11 15:00:03 字数 1600 浏览 1 评论 0原文

我已经为我的项目创建了 jar，但 MANIFEST.MF 遇到问题。我的 MANIFEST.MF 的结构如下：

------------------------
Manifest-Version: 1.0
Main-Class: com.ensarm.niidle.web.scraper.NiidleScrapeManager
Class-Path: /Projects/EnwelibDatedOct13/Niidle/lib/hector-0.6.0-17.jar
----------------------------

当我使用命令运行它时：

>>java -jar /usr/local/bin/niidle.jar arguments...

然后它工作正常...... 但我不需要完整的类路径名称。

所以当我的 MANIFEST.MF 结构如下时：我希望它使用以下类路径运行：

---------------------
Manifest-Version: 1.0
Main-Class: com.ensarm.niidle.web.scraper.NiidleScrapeManager
Class-Path: lib/hector-0.6.0-17.jar
----------------------------

现在当我使用命令运行它时：

>>java -jar /usr/local/bin/niidle.jar arguments...

然后它显示错误：---

---Exception in thread "main" java.lang.NoClassDefFoundError: me/prettyprint/hector/api/Serializer
    at com.ensarm.niidle.web.scraper.NiidleScrapeManager.main(NiidleScrapeManager.java:21)
Caused by: java.lang.ClassNotFoundException: me.prettyprint.hector.api.Serializer
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
    ... 1 more

请告诉我解决方案......

原文

I have created jar for my project,I am having problem with MANIFEST.MF.
structure of my MANIFEST.MF is as follows:

------------------------
Manifest-Version: 1.0
Main-Class: com.ensarm.niidle.web.scraper.NiidleScrapeManager
Class-Path: /Projects/EnwelibDatedOct13/Niidle/lib/hector-0.6.0-17.jar
----------------------------

when I run this using command:

>>java -jar /usr/local/bin/niidle.jar arguments...

then its working properly.....
but I dont want the full Class-Path name.

So when structure of my MANIFEST.MF is as follows:
and I want this to run using following Class-Path:

---------------------
Manifest-Version: 1.0
Main-Class: com.ensarm.niidle.web.scraper.NiidleScrapeManager
Class-Path: lib/hector-0.6.0-17.jar
----------------------------

and now when I run this using command:

>>java -jar /usr/local/bin/niidle.jar arguments...

then it is showing error:---

---Exception in thread "main" java.lang.NoClassDefFoundError: me/prettyprint/hector/api/Serializer
    at com.ensarm.niidle.web.scraper.NiidleScrapeManager.main(NiidleScrapeManager.java:21)
Caused by: java.lang.ClassNotFoundException: me.prettyprint.hector.api.Serializer
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
    ... 1 more

Please tell me solution for that.....

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信仰 2024-10-18 15:00:03

显然，所需的库不在实际的类路径上。这里说：

Class-Path 标头中的 URL 是相对于 applet 或应用程序的 JAR 文件的 URL 给出的。

因此，根据我的理解，java 现在（仅）在此位置查找 hector 库：

/usr/local/bin/lib/hector-0.6.0-17.jar

注意，如果使用 -jar 选项执行 java，则类路径条目将从 manefest 中获取仅，-cp 或$CLASSPATH 中的其他条目将被忽略。

Obviously, the required library is not on the actual classpath. Here it says:

The URLs in the Class-Path header are given relative to the URL of the JAR file of the applet or application.

So at my understandig, java now looks for the hector library (only) at this location:

/usr/local/bin/lib/hector-0.6.0-17.jar

Note, that if you execute java with the -jar option, the classpath entries are taken from the manefest only, additional entries in -cp or $CLASSPATH are ignored.

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