linux服务器中所部属的很多服务中，有相当一部分是jar文件，在设计这些程序的过程中，关键信息有相当一部分都是放在配置文件中，如何在服务器通过解压与压缩jar文件中的配置文件来修改关键信息呢？这里介绍jar文件的解压与压缩。
解压：
[xxx@application01 bfd_test]$ ll total 16 drwxr-xr-x 2 root root 4096 Oct 24 11:00 lib -rw-r--r-- 1 root root 5523 Oct 24 11:05 TestLinuxPackage-0.0.1-SNAPSHOT.jar drwxr-xr-x 2 root root 4096 Oct 24 12:38 unpack [xxx@application01 bfd_test]$ cd unpack/ [xxx@application01 unpack]$ sudo jar -xvf ../TestLinuxPackage-0.0.1-SNAPSHOT.jar extracted: test.properties created: META-INF/ created: META-INF/maven/ created: META-INF/maven/com.changjiang.test/ created: META-INF/maven/com.changjiang.test/TestLinuxPackage/ extracted: META-INF/maven/com.changjiang.test/TestLinuxPackage/pom.xml extracted: META-INF/maven/com.changjiang.test/TestLinuxPackage/pom.properties extracted: META-INF/MANIFEST.MF created: com/ created: com/changjiang/ created: com/changjiang/test/ created: com/changjiang/test/TestLinuxPackage/ extracted: com/changjiang/test/TestLinuxPackage/App.class [xxx@application01 unpack]$ ll total 12 drwxr-xr-x 3 root root 4096 Oct 24 10:56 com drwxr-xr-x 3 root root 4096 Oct 24 10:58 META-INF -rw-r--r-- 1 root root 26 Oct 24 11:04 test.properties
修改test.properties中的信息：
[xxx@application01 unpack]$ ll
total 12
drwxr-xr-x 3 root root 4096 Oct 24 10:56 com
drwxr-xr-x 3 root root 4096 Oct 24 10:58 META-INF
-rw-r--r-- 1 root root 26 Oct 24 11:04 test.properties
[xxx@application01 unpack]$ clear
[xxx@application01 unpack]$ cat test.properties
name=bruce
password=321
[xxx@application01 unpack]$ sudo sed -i "s/321/password/g" test.properties
[xxx@application01 unpack]$ cat test.properties
name=bruce
password=password
打包当前目录下所有的文件到jar文件中：
[xxx@application01 unpack]$ ll
total 12
drwxr-xr-x 3 root root 4096 Oct 24 10:56 com
drwxr-xr-x 3 root root 4096 Oct 24 10:58 META-INF
-rw-r--r-- 1 root root 31 Oct 24 12:55 test.properties
[xxx@application01 unpack]$ sudo jar -cvfM0 Test.jar ./
adding: test.properties(in = 31) (out= 31)(stored 0%)
adding: META-INF/(in = 0) (out= 0)(stored 0%)
adding: META-INF/maven/(in = 0) (out= 0)(stored 0%)
adding: META-INF/maven/com.changjiang.test/(in = 0) (out= 0)(stored 0%)
adding: META-INF/maven/com.changjiang.test/TestLinuxPackage/(in = 0) (out= 0)(stored 0%)
adding: META-INF/maven/com.changjiang.test/TestLinuxPackage/pom.xml(in = 2114) (out= 2114)(stored 0%)
adding: META-INF/maven/com.changjiang.test/TestLinuxPackage/pom.properties(in = 134) (out= 134)(stored 0%)
adding: META-INF/MANIFEST.MF(in = 188) (out= 188)(stored 0%)
adding: com/(in = 0) (out= 0)(stored 0%)
adding: com/changjiang/(in = 0) (out= 0)(stored 0%)
adding: com/changjiang/test/(in = 0) (out= 0)(stored 0%)
adding: com/changjiang/test/TestLinuxPackage/(in = 0) (out= 0)(stored 0%)
adding: com/changjiang/test/TestLinuxPackage/App.class(in = 1257) (out= 1257)(stored 0%)
[xxx@application01 unpack]$ ll
total 20
drwxr-xr-x 3 root root 4096 Oct 24 10:56 com
drwxr-xr-x 3 root root 4096 Oct 24 10:58 META-INF
-rw-r--r-- 1 root root 5528 Oct 24 13:08 Test.jar
-rw-r--r-- 1 root root 31 Oct 24 12:55 test.properties
测试下新打包的jar包是否能够正常运行：
[xxx@application01 unpack]$ sudo mv Test.jar ../Test.jar [xxx@application01 unpack]$ cd .. [xxx@application01 bfd_test]$ ll total 16 drwxr-xr-x 2 root root 4096 Oct 24 11:00 lib -rw-r--r-- 1 root root 5528 Oct 24 13:08 Test.jar drwxr-xr-x 4 root root 4096 Oct 24 13:09 unpack [xxx@application01 bfd_test]$ sudo java -jar Test.jar bruce password [xxx@application01 bfd_test]$