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                            JAR\(Java Archive File\)：Java歸檔文件，JAR文件時一種壓縮文件，與ZIP壓縮文件兼容，通常稱為JAR包；

JAR文件與ZIP文件的區別就是JAR文件中默認包含了一個名為META-INF/MANIFEST.MF的清單文件；
JAR包的優點：
![](https://img.kancloud.cn/62/c9/62c901565b352d1758e8472982290702_798x184.png)

### 常用命令
```
jar cvf library.jar com/mycompany/\*.class ? ?## 打JAR包
jar cvfe program.jar com.mycompany.MainClass com/mycompany/\*.class ?##打JAR包并指定入口
```

### JAR包的目錄結構
```
test.jar
|-META-INF
    |-MANIFEST.MF
|-test
    |-Test.class
```




                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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