首先，你要了解你的项目是什么 然后右击鼠标，选择底部的属性 然后在左上角选择内置路径然后添加外部jar文件添加点击应用，就这样了

只是对将jar导入Eclipse(插件开发)项目的注释:

In case you are developing Eclipse plug-ins, it makes sense to use Eclipse's native bundling mechanism instead of just importing the jar into a plug-in project. Eclipse (or better its underlying OSGi runtime, Equinox) uses so-called bundles which contain some more information than plain jars (e.g., version infos, dependencies to other bundles, exported packages; see the MANIFEST.MF file). Because of this information, OSGi bundles can be dynamically loaded/unloaded and there is automatic dependency resolution available in an OSGi/Eclipse runtime. Hence, using OSGi bundles instead of plain jars (contained inside another OSGi bundle) has some advantages.

(顺便说一句:Eclipse插件与OSGi包是一回事。)

很有可能有人已经将某个(第三方)库绑定为OSGi包。你可能想看看下面的bundle仓库:

http://www.springsource.com/repository/app/ http://download.eclipse.org/tools/orbit/downloads/ http://www.osgi.org/Repository/HomePage

两个选择:

1/来自项目:

2/如果你已经导入了其他jar，从“References Libraries”目录:

两者都会引导你进入这个屏幕，在这里你可以管理你的库:

如果你有一个麻烦的udemy课程乍得对进口的罐子。然后按照这些步骤进行。

右键单击项目。 你会看到一个Build Path选项，点击它。 你会有一个选项配置构建路径，点击它。 去图书馆。 然后去你有一个jar文件的地方，把它们放到一个新的文件夹里，上传到一个新的地方。 然后点击Add External Jars，你肯定可以上传它，这也会对classpathxmlapplicationcontext有帮助。

谢谢你！

以下是步骤:

click File > Import. The Import window opens. Under Select an import source, click J2EE > App Client JAR file. Click Next. In the Application Client file field, enter the location and name of the application client JAR file that you want to import. You can click the Browse button to select the JAR file from the file system. In the Application Client project field, type a new project name or select an application client project from the drop-down list. If you type a new name in this field, the application client project will be created based on the version of the application client JAR file, and it will use the default location. In the Target runtime drop-down list, select the application server that you want to target for your development. This selection affects the run time settings by modifying the class path entries for the project. If you want to add the new module to an enterprise application project, select the Add project to an EAR check box and then select an existing enterprise application project from the list or create a new one by clicking New. Note: If you type a new enterprise application project name, the enterprise application project will be created in the default location with the lowest compatible J2EE version based on the version of the project being created. If you want to specify a different version or a different location for the enterprise application, you must use the New Enterprise Application Project wizard. Click Finish to import the application client JAR file.

Eclipse ->首选项-> Java ->构建路径->用户库->新建(命名它)->添加外部jar

(我建议在这些步骤之前将您的新库拖到eclipse文件夹中，以保持所有内容在一起，这样如果您重新安装eclipse或您的操作系统，您就不需要rwlink除JDK以外的任何内容)现在选择您想要的jar文件。单击OK。

右键单击项目并选择生成路径->添加库

供参考，只是代码，然后右键单击和来源->组织导入