如何从不同的目录运行 java 程序? [英] How do I run a java program from a different directory?

问题描述

我有一个 Java 程序，我希望它能够在我机器上的任何地方运行.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:

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:

java.lang.NoClassDefFoundError: commandprogram/CommandProgram

这是我的脚本:

#!/bin/sh
CWD=`dirname "$0"`
java -cp "$CWD/classes;$CWD/lib/AJarFile.jar" commandprogram/CommandProgram

将 java 行更改为以下内容:

Changing the java line to the following:

java -cp "$CWD/classes;$CWD/classes/commandprogram;$CWD/lib/AJarFile.jar" CommandProgram

产生相同的结果.

推荐答案

在尝试了我能想到的几乎所有方法后，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:

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:

#!/bin/sh
CWD=`dirname "$0"`
CWD=`cygpath -w "$CWD"`
java -cp "$CWD/classes;$CWD/lib/AJarFile.jar" commandprogram/CommandProgram

然后CWD改为C:Program Files..."而不是/cygdrive/c/Program Files/..."

Then CWD changed to "C:Program Files..." instead of "/cygdrive/c/Program Files/..."

我之前遇到过这个问题，用cygpath -w的方法解决了，但是后来稍微改了一下脚本，没注意到路径问题又回来了.

I had previously encountered this problem and solved it with the cygpath -w solution, but then changed my script slightly and didn't notice that the path problem came back.

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