如何从不同的目录运行 java 程序？
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How do I run a java program from a different directory?
提问by Swoogan
I have a java program that I would like to be able to run from anywhere on my machine. I would like to run it from my Cygwin command prompt. I've made scripts to call the java program. I added the location of the java program to the classpath, and the scripts work when I run them from the java program's directory. However, when I try to run from any other directory, I get:
我有一个 Java 程序，我希望能够在我机器上的任何地方运行它。我想从我的 Cygwin 命令提示符运行它。我已经编写了脚本来调用 java 程序。我将 java 程序的位置添加到类路径中，当我从 java 程序的目录中运行它们时，脚本会起作用。但是，当我尝试从任何其他目录运行时，我得到：
java.lang.NoClassDefFoundError: commandprogram/CommandProgram
This is my script:
这是我的脚本：
#!/bin/sh
CWD=`dirname "java -cp "$CWD/classes;$CWD/classes/commandprogram;$CWD/lib/AJarFile.jar" CommandProgram
"`
java -cp "$CWD/classes;$CWD/lib/AJarFile.jar" commandprogram/CommandProgram
Changing the java line to the following:
将 java 行更改为以下内容：
#!/bin/sh
CWD=`dirname "java -classpath commandprogram CommandProgram
"`
CWD=`cygpath -w "$CWD"`
java -cp "$CWD/classes;$CWD/lib/AJarFile.jar" commandprogram/CommandProgram
produces the same results.
产生相同的结果。
采纳答案by Swoogan
After trying just about everything I could think of, I echoed out the command and saw that there was mixing of Cygwin paths and Windows paths. The solution was to change the script to:
在尝试了我能想到的所有方法后，我回显了命令，发现 Cygwin 路径和 Windows 路径混合在一起。解决方案是将脚本更改为：
java -classpath directory_to_program Program
Then CWD changed to "C:\Program Files\..." instead of "/cygdrive/c/Program\ Files/..."
然后 CWD 更改为“C:\Program Files\...”而不是“/cygdrive/c/Program\ Files/...”
I had previously encountered this problem and solved it with the cygpath -wsolution, but then changed my script slightly and didn't notice that the path problem came back.
之前遇到过这个问题，用cygpath -w解决方法解决了，但是后来稍微改了一下我的脚本，没注意到路径问题又回来了。
回答by woakas
add your directory to classpath example:
将您的目录添加到类路径示例：
C:\Program Files\Java\jdk1.7.0_05\bin> javac filename.java && java classname
or
或者
D:\Project java> set path=%path%;C:Program Files\Java\jdk1.7.0_05\bin
回答by cd1
you have to use a dot to separate packages, not a slash.
您必须使用点来分隔包，而不是斜线。
java -cp "$CWD/classes;$CWD/lib/AJarFile.jar" commandprogram.CommandProgram
java -cp "$CWD/classes;$CWD/lib/AJarFile.jar" commandprogram.CommandProgram
回答by Kaushik
The usual way of running a java file is to save it in the Java/Binfolder and Run cmd
运行java文件的常用方法是将其保存在Java/Bin文件夹中并运行cmd
If you save the file in different directory such as D:, you can use the following on the cmd prompt:
如果将文件保存在不同的目录中，例如D:，则可以在 cmd 提示符下使用以下内容：
