在Eclipse使用插件将java程序打包成jar

最新推荐文章于 2018-03-06 00:27:59 发布

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最新推荐文章于 2018-03-06 00:27:59 发布

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本文介绍如何使用Eclipse FatJar插件创建包含所有依赖的独立JAR文件。通过六个步骤，从创建Java项目到导出为可执行的FatJar文件，详细解释了整个过程及可能遇到的问题。

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插件下载地址 :

http://sourceforge.net/project/showfiles.php?group_id=115990&package_id=125924

插件的安装与启动:

zip文件含有插件目录的,把fatjar.jar放入eclipse的插件目录下.
关闭 eclipse.
以eclipse -clean命令从命令行启动 eclipse
否则发现不了插件.

删除:
只要在eclipse的插件目录下移出net.sf.fjep.fatjar_x.x.x即可

实践：

Step 1: Create a new Java Project "demolib"

Create a new Java Project named "demolib".
Add the Class "demolib.DemoLib.java" containing the following code:

package demolib;

public class DemoLib {
    public static void sayHello() {
        System.out.println("Hello");
    }
}

The Project should look something like this:

Step 2: Create a jar file using Fat Jar Plug-In

In the "Package-Explorer" (not the "Resource-View") right click on the project "demolib".
Select "+ Build Fat Jar".

A Configuration Dialog appears. Just press "Finish".

在这一步遇到 “The chosen operation is not currently available” 的错误，将jdk升级或下载插件的时候选择较老的版本即可。这属于兼容性问题。

The File "demolib_fat.jar" has been created in the project root directory.

Step 3: Create a new Java-Project "demorun"

Create a new Java Project named "demorun".
In the project properties add the Library "demolib/demolib_fat.jar" to the Java Build Path":

Step 4: Create Main Class

Add the Class "demorun.DemoRunMain.java" containing the following code:

package demorun;

import demolib.DemoLib;

public class DemoRunMain {
    public static void main(String[] args) {
        DemoLib.sayHello();
    }
}

The Project should look something like this:

Step 5: Start the Build Fat Jar Dialog

Start the Export Wizard from the File-Menu ("File" -> "Export").
Select "+ Fat Jar Exporter" and click "next >".

Select the project "demorun" and click "next >".

A Configuration-Dialog appears showing the current Settings.

Step 6: Select the Main Class

The Main Class - the one containing the static methode main - must be defined in the jar.
Click on the "Browse..." Button on the right side behind the Main-Class Edit field.

Select "DemoRunMain" and click the "OK" Button.
The FullyQualifiedName "demorun.DemoRunMain" is now set for "Main-Class".

Step7: Finish

Save the current Settings by clicking on the "Finish" Button.

The File "demorun_fat.jar" has been created in the project root directory.
In addition the file ".fatjar" storing the configuration settings has been created in the project root directory

The created jar file contains all classes from all referenced jar files (demolib_fat.jar) and the project classes.
This file can be executed anywhere, no classpath has to be set, because all necessary libraries
are extracted inside the "Fat Jar":