The problem cannot be found in the third-party jar package referenced by the jar package in eclipse.

During the project process, use eclipse to compress a jar package and use export --> JAVA --> JAR file. In my jar package, a third-party jar package, such as log4j, I also encountered this problem:

 

Http://zhidao.baidu.com/question/48376665.html

 

"Other jar packages are referenced in my program.

Running normally in eclipse

I want to create a jar package for my program.

During packaging, the referenced package is also included.

The package I referenced is always not found in the runable program"

Baidu knows that the best answer is as follows:

Create a new META-INF folder under your project folder

The file content of manifest. mf is as large as follows:

Manifest-Version: 1.0

Ant-Version: Apache Ant 1.6.2

Created-By: 1.5.0_06-57 ("Apple Computer, Inc.")

Built-By: hani

Main-Class: com.opensymphony.workflow.designer.Launcher

Class-Path: looks.jar forms.jar syntax.jar jgraph.jar foxtrot.jar osworkflow-2.8.0.jar oscore-2.2.5.jar

Main-class is the class you want to run.

Class-path: the package you want to introduce

Use eclipse to export the JAR file, select

user existing manifest from workspace

Manifest file:/your project name/src/META-INF/manifest. MF

Click Finish. This should work.

According to the above statement, I created a folder named META-INF under the SRC folder of my project, which created a file named manifest. MF, the content of which is as follows:

Manifest-Version: 1.0
Main-Class: com.sgfs.udp.client.ClientMain
Class-Path: ./lib/log4j-1.2.15.jar

Then, right-click the project and choose export --> JAVA file to export the jar package. What you need to do is to export the JAR file directory. For example, I put it in C: /sgfsudpclient directory, create a folder named Lib, and then add manifest. in the MF File class-path: Put the specified log4j-1.2.15.jar inside. The directory structure is as follows:

In this case, OK. Maybe you may think this method is not very good. Can you automatically include the referenced jar package in the package ??, In the end, we only need a jar file which can be run in any place. Yes, fatjar (the fat jar Eclipse plug-in is a deployment-tool which deploys an eclipse Java-project into one executable jar .), complete the operation by referring to the following article.

Eclipse jar package, plug-in fatjar Installation and Use (http://blog.csdn.net/jikeyzhang/archive/2009/10/27/4731968.aspx)

Fatjar Project address: http://fjep.sourceforge.net/

The summary in the above article is as follows: Generally, You can package SRC export => JAR file. To package SRC resources together, you must use fatjar => export... => fatjar.

The brief operation instructions are as follows:

Right-click your project and select build fat jar as follows:

In the pop-up window, select the main-class to be run, as shown below:

Click Next. On the next page, select the third-party jar package to be used, as shown below:

Click Finish to generate the JAR file.