编译时如何使用通配符包含JAR文件？

I have the following in a java file (MyRtmpClient.java):

我在java文件（MyRtmpClient.java）中有以下内容：

import org.apache.mina.common.ByteBuffer;

and ByteBuffer is inside a JAR file (with the proper directory structure of course). That jar file and others I need are in the same directory as the .java file.

和ByteBuffer在JAR文件中（当然具有正确的目录结构）。我需要的jar文件和其他文件与.java文件位于同一目录中。

Then I compile with the line:

然后我用这行编译：

javac -cp ".;*.jar" MyRtmpClient.java

But I get the error:

但我得到错误：

MyRtmpClient.java:3: package org.apache.mina.common does not exist import org.apache.mina.common.ByteBuffer;

MyRtmpClient.java:3：包org.apache.mina.common不存在import org.apache.mina.common.ByteBuffer;

How can I include jar files in my project?

如何在项目中包含jar文件？

9 个解决方案

#1

your command line is correct, but there are some considerations:

你的命令行是正确的，但有一些注意事项：

you must have javac >= 1.6, because only in that version the compiler parses the "*" as various JAR files.
你必须有javac> = 1.6，因为只有在那个版本中，编译器才会将“*”解析为各种JAR文件。
you must be running Windows, because ";" is the path separator for that operating system only (it doesn't work on Unix, the path separator on Unix is ":").
你必须运行Windows，因为“;”是仅适用于该操作系统的路径分隔符（它在Unix上不起作用，Unix上的路径分隔符是“：”）。

I'm assuming that the JAR file has the proper directory structure as you stated.

我假设JAR文件具有正如您所述的正确目录结构。

#2

javac does not understand *.jar in the classpath argument. You need to explicitly specify each jar. e.g.

javac不理解classpath参数中的* .jar。您需要明确指定每个jar。例如

javac -cp ".;mina.jar" MyRtmpClient.java

#3

In your case, I think JAVAC can not found jars file.

在你的情况下，我认为JAVAC找不到jars文件。

Please try:

请尝试：

PROJECT_PATH
- lib\a.jar
- src\package\b.java

PROJECT_PATH - lib \ a.jar - src \ package \ b.java

cd @PROJECT_PATH

javac -classpath lib\a.jar src\package\b.java

#4

In javac JDK 6 and above You could use (note lack of .jar):

在javac JDK 6及更高版本中你可以使用（注意缺少.jar）：

javac -cp ".;*" MyRtmpClient.java

to quote javac - Java programming language compiler

引用javac - Java编程语言编译器

As a special convenience, a class path element containing a basename of * is considered equivalent to specifying a list of all the files in the directory with the extension .jar or .JAR.

作为一种特殊的方便，包含基本名称*的类路径元素被认为等同于指定扩展名为.jar或.JAR的目录中所有文件的列表。

For example, if directory foo contains a.jar and b.JAR, then the class path element foo/* is expanded to A.jar;b.JAR, except that the order of jar files is unspecified. All jar files in the specified directory, even hidden ones, are included in the list. A classpath entry consisting simply of * expands to a list of all the jar files in the current directory.

例如，如果目录foo包含a.jar和b.JAR，则类路径元素foo / *将扩展为A.jar; b.JAR，但未指定jar文件的顺序。指定目录中的所有jar文件，甚至是隐藏的文件都包含在列表中。简单地由*组成的类路径条目扩展为当前目录中所有jar文件的列表。

#5

If you have utilities find and tr at your disposal (e.g. you're working Linux), you could do:

如果你有自己的实用程序find和tr（例如你正在使用Linux），你可以这样做：

javac -cp .:`find * -name "*.jar" | tr "\n" ":"` MyRtmpClient.java

All jar files in the current directory and all it's sub-directories will be added (shell command lists all jar files and puts colons as separators between them).

将添加当前目录中的所有jar文件及其所有子目录（shell命令列出所有jar文件，并将冒号作为它们之间的分隔符放置）。

Explanation:

pair of the backticks ( ` ) denote shell commands to be executed,
一对反引号（`）表示要执行的shell命令，
find * -name "*.jar" finds and lists all jar files in hierarchy whose root is current folder,
find * -name“* .jar”查找并列出层次结构中根目录为当前文件夹的所有jar文件，
vertical bar ( | ) is pipe; connects output of find to the input of next command,
竖条（|）是管道;将find的输出连接到下一个命令的输入，
tr "\n" ":" replaces all newline characters with colon characters.
tr“\ n”“：”用冒号字符替换所有换行符。

#6

Probably below syntax will work on windows dos command

可能下面的语法将适用于Windows dos命令

javac -cp ".;first.jar;second.jar;third.jar" MyRtmpClient.java

#7

In Java 8, the option ".;*" etc. which are mentioned above did not seem to work. I tried and found that : javac -cp '<location of jars>/*' MyRtmpClient.java

在Java 8中，上面提到的选项“。; *”等似乎不起作用。我试过并发现：javac -cp' / *'MyRtmpClient.java 的位置>

works:

作品：

<location of jar> can be /usr/local/classes/* or /home/developer/MyProject/*

可以是/ usr / local / classes / *或/ home / developer / MyProject / * 的位置>

#8

-2

try including the jar file in your command line so :

尝试在命令行中包含jar文件，以便：

javac MyRtmpClient.java ByteBuffer.jar

#9

-2

You cannot use -cp with Javac. You have to use -classpath instead (assuming the other settings are correct).

您不能将-cp与Javac一起使用。您必须使用-classpath（假设其他设置正确）。

#1