在 Windows 命令行中将 Jar 文件添加到 Buildpath [英] Add Jar File to Buildpath in Windows Command Line

问题描述

我很生气不得不问这个问题，但我无法让它工作.目前我有一个项目:

Im quite annoyed at having to ask this but I cant get it to work. Currently I have a project with:

src/文件夹中的 5 个类

5 Classes in the src/ folder

2 个名为 profiles.jar 的 JARS 和根目录下的classifier.jar

2 JARS named profiles.jar and classifier.jar in the root folder

我想创建一个makefile?"或批处理文件?"编译和运行这些类从 WINDOWS 命令​​行，但首先将 jar 添加到构建路径?我不知道我是怎么做的

I want to create a "makefile?" or "batch file?" to compile and run these classes FROM THE WINDOWS COMMAND LINE, but first add the jars to the buildpath? Im not sure how I go about this

当我尝试这样做时，它说找不到类，很可能是因为我没有正确地将 jars 添加到构建路径中.在命令提示符中运行它需要使用哪些命令?

When I try to do it, it says that the class is not found, most likely due to me not adding the jars to the buildpath correctly. What are the commands I need to use to run this in command prompt?

谢谢菲利普

编辑

感谢您的帮助，我在让它工作时遇到了很多麻烦目前我有一个项目，src 文件夹中有 5 个类，jar 文件夹中有 2 个 jar

Thanks for the help, Im having alot of trouble getting it to work tho Currently I have a project with 5 classes in the src folder, and 2 jars in the jar folder

这是命令我正在运行:

设置CLASSPATH=C:wampwww ewsUserProfilingjarsclassifier.jar;C:wampwww ewsUserProfilingjarsprofiles.jar

set CLASSPATH=C:wampwww ewsUserProfilingjarsclassifier.jar ;C:wampwww ewsUserProfilingjarsprofiles.jar

然后从根文件夹，我运行:

Then from the root folder, Im running:

javac src/*.java

javac src/*.java

那么:

java -cp ./src:./jars/*源代码/交互

java -cp ./src:./jars/* src/Interaction

交互是主要的类，我收到了各种 noclassfound 错误，我做错了什么吗?非常感谢菲利普

Interaction is the main class, Im getting all sorts of noclassfound errors, am I doing something wrong? Many thanks Philip

错误

java -cp ./src:./jars/* 交互线程main"中的异常java.lang.NoClassDefFoundError:由以下原因引起的交互作用:java.lang.ClassNotFoundException:相互作用在 java.net.URLClassLoader$1.run(Unknown来源)在 java.security.AccessController.doPrivileged(Native方法)在 java.net.URLClassLoader.findClass(Unknown来源)在 java.lang.ClassLoader.loadClass(Unknown来源)在 sun.misc.Launcher$AppClassLoader.loadClass(Unknown来源)在 java.lang.ClassLoader.loadClass(Unknown来源)在 java.lang.ClassLoader.loadClassInternal(Unknown来源)找不到主类:相互作用.程序将退出.

java -cp ./src:./jars/* Interaction Exception in thread "main" java.lang.NoClassDefFoundError: Interaction Caused by: java.lang.ClassNotFoundException: Interaction at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClassInternal(Unknown Source) Could not find the main class: Interaction. Program will exit.

推荐答案

在早于或等于 Java 版本 5 的版本中，您必须在类路径中单独指定每个 jar，以及源的根目录，例如

In version older than or equal to Java version 5 you must specify each jar individually, and the root of your source, on your classpath e.g.

java -cp a.jar:b.jar:c.jar:./src MainClass

在第 6 版中，您可以对 jar 使用通配符，例如

In version 6 you can use wildcards for the jars e.g.

java -cp ./src:* MainClass

但是把你的 jars 放到一个子目录中可能更干净，例如

but it might be cleaner putting your jars into a sub directory e.g.

java -cp ./src:./jars/* MainClass

因此，基本上，您的 makefile 或启动脚本需要构建一个类似于上述命令之一的命令.

So basically, your makefile or start script needs to construct a command like one of the above.

更多信息 - Sun 文档 (v6)

更新 - 为了响应您的第二次编辑，您需要指定完整的主类名称，因此如果该类位于名为com.mypackage.MainClass"的包中，那么您需要执行:

Update - in response to your second edit, you need to specify the full main class name, so if the class is in a package called 'com.mypackage.MainClass' then you need to do:

java -cp ./src:./jars/* com.mypackage.MainClass

我还建议先将命令作为独立命令运行，然后再运行整个脚本.通过移除移动部件，调试速度会更快，并且更容易查看正在发生的事情.

I'd also suggest getting the command working as a standalone command first, before getting the whole script running. By removing moving parts it will be faster to debug and easier to see what's going on.

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