如何在Linux终端中使用外部jar文件编译java项目 [英] How to compile java project with external jar file in Linux terminal

问题描述

我的项目包含外部jar文件，我按照这个链接 http://www.wikihow.com/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29 添加外部java路径。然后我尝试在终端中编译我的代码，但是我仍然得到关于jar文件不存在的错误。

I have project which includes external jar file in it, I followed this link http://www.wikihow.com/Add-JARs-to-Project-Build-Paths-in-Eclipse-%28Java%29 to add external java path. Then I tried to compile my code in terminal, however I am still get an error about jar file does not exist.

我写了以下命令:(目前我在项目目录中有三个名为bin src和lib的文件夹。

I wrote the following commands: (Currently I am in the project directory and there are three folders called bin src and lib in there)

bash-3.2$ ls
bin  lib  README.txt  src
bash-3.2$ javac -cp lib/jsoup-1.6.1.jar src/DayTradingStockBlog.java
bash-3.2$ java -cp .:lib/jsoup-1.6.1.jar src/DayTradingStockBlog
Exception in thread "main" java.lang.NoClassDefFoundError: src/DayTradingStockBlog (wrong name: DayTradingStockBlog)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
        at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: src/DayTradingStockBlog.  Program will exit.

我该如何解决这个问题？

How should I solve this problem ?

推荐答案

在调用java（但是对javac）时，永远不要使用斜杠，它是路径分隔符。如果src是你的包裹声明的一部分 - 在这种情况下整个包裹声明，我打赌它不是，你会，而不是：

You never use slashes, which are path delimiters, in a call to java (but to javac). If src is part of your package declaration - in this case the whole package declaration, which I bet it is not, you would, instead of:

 java -cp .:lib/jsoup-1.6.1.jar src/DayTradingStockBlog

使用点：

 java -cp .:lib/jsoup-1.6.1.jar src.DayTradingStockBlog

但我想这只是你创建类的地方，所以路径属于类路径：

But I guess it is just the place where you created the class, so the path belongs to the classpath:

 java -cp .:lib/jsoup-1.6.1.jar:./src DayTradingStockBlog

您无法从类名中省略路径，并将其附加到类路径，反之亦然 - 它必须适合您的包宣言。

You aren't free to omit the path from the Class name, and append it to the classpath, or vice versa - it has to fit to your package declaration.

如果你声明一个包 foo ，（它比src更有意义），你的类名是no更长 DayTradingStockBlog 但 foo.DayTradingStockBlog 。

If you declare a package foo, (which has much more sense than src), your class name is no longer DayTradingStockBlog but foo.DayTradingStockBlog.

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