How to decompress and view the JAR package under Linux

Decompress and view the JAR package under Linux

Problem

In a production environment, sometimes there is a need to view the contents of the jar online.

At this point, the unzip/tar commands have lost their use.

Solution

If the file fileJar.jar

#cd /tmp
#touch abc
#cd abc
#jar -xvf fileJar.jar

Note: Unzip to The current directory will not create a new folder, but will extract all the contents of the jar package to the current folder. Therefore, it is best to create a new directory first

Common commands for decompressing files—— linux

Decompress file command

1. Decompress jar package

(1) Decompress jar

Extract to the current directory ： jar -xvf hello-0.0.1.jar

If you want to specify the directory, go directly to the target directory to decompress:

jar -xvf ../hello-0.0.1.jar

If you want to specify the directory, you can also use unzip -d to specify the directory

unzip derby.war -d ./gg/ff/

(2) Compressed jar

jar -cvf test.jar ./gg
jar -cvfM0 test.jar ./gg

(3) Partial parameter description

Instructions:

• -c Create war package

• -v Display process information

• -f Specify the JAR file name, usually this parameter is required

• -M does not generate a list of all items (MANIFEST) file, this parameter will ignore the -m parameter

• -0 This is an Arabic numeral, which means only packaging but not compression

2. Decompress the war package

(1) Decompress the war

with the same jar package command

(2) Compressed jar

is the same as compressed jar package

jar -cvf test.war ./gg
jar -cvfM0 test.war ./gg

3. Decompress tar package

(1) Decompress tar

Decompress the current The tar package in the directory to the current directory:

tar -zxvf redis-6.0.16.tar.gz ./

Decompress the tar package in the specified directory to the current directory

Command: tar -zxvf The tar file in the specified directory

tar -zxvf ../../softWare/apache-zookeeper-3.6.3-bin.tar.gz

Decompress the tar file in the current directory to the specified directory:

Command: tar -zxvf file name.tgz -C Specify the directory

tar -zxvf redis-6.0.16.tar.gz -C ../install

If you decompress the .tar file

直接 tar -xvf XXX.tar

（ 2) Compress tar

Command: tar -zcvf Compressed file name.tar.gz Compressed file name

tar -zcvf test01.tar.gz ./test

4. Decompress the zip file

(1) Compress zip file

Compress the contents of the susu folder in the current directory to test1.zip

zip -r test1.zip ./susu

Compress the susu folder and liu folder in the current directory The content under is compressed into test2.zip

zip -r test2.zip susu liu

(2) Decompress the zip file

Extract test1.zip in the current directory to the current directory

unzip test1.zip

Decompress multiple files at the same time

Extract the .zip files starting with test such as test1.zip and test2.zip in the current directory to the current directory at the same time

1) Use the command (note that quotation marks " " are required):

If you don’t add quotes, an error will be reported: Caution: filename not matched: test2.zip

unzip "test*.zip"

2) Use the command (without adding quotes)

unzip test\*.zip

3) Use the command (without adding quotes) Quotation marks)

ls test*.zip | xargs -n1 unzip -o

Extract all .zip files in the current directory to the current directory at the same time

1) Unzip all .zip files in the directory

unzip \*.zip

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