查看jar包内容

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unzip -q -c myarchive.jar META-INF/MANIFEST.MF

-q will suppress verbose output from the unzip program

-c will extract to stdout

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unzip -q -c servlet-api.jar META-INF/MANIFEST.MF
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.1
Created-By: 1.6.0_45-b06 (Sun Microsystems Inc.)
X-Compile-Source-JDK: 1.6
X-Compile-Target-JDK: 1.6

Name: javax/servlet/
Specification-Title: Java API for Servlets
Specification-Version: 3.0
Specification-Vendor: Sun Microsystems, Inc.
Implementation-Title: javax.servlet
Implementation-Version: 3.0.FR
Implementation-Vendor: Apache Software Foundation

jar命令

在linux下如何查看一个jar文件中有哪些类呢？

jar tf test.jar

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META-INF/
META-INF/MANIFEST.MF
javax/
javax/servlet/
javax/servlet/annotation/
javax/servlet/descriptor/
javax/servlet/http/
...
javax/servlet/resources/xml.xsd
META-INF/NOTICE
META-INF/LICENSE

grepjar

有些时候，我们需要查看一个jar文件中是否包含了某个方法，这个在linux下可以通过下面的命令来查询

grepjar methodName class.jar

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$ grepjar 'getStatus' servlet-api.jar
javax/servlet/http/HttpServletResponse.class:getStatus
javax/servlet/http/HttpServletResponseWrapper.class:getStatus

参数：

||option || meaning ||
|-b | Print byte offset of match.|
|–|—————|
|-c | Print number of matches.|
|-i | Compare case-insensitively.|
|-n | Print line number of each match.|
|-s | Suppress error messages.|
|-w | Force PATTERN to match only whole words.|
|-e | PATTERN Use PATTERN as regular expression.|
|–help | Print help, then exit.|
|-V | |
|–version | Print version number, then exit.|

参考

How to read MANIFEST.MF file from JAR using Bash - Stack Overflow

吴峰子 — linux查看jar中的类以及类中方法命令

grepdiff - Unix, Linux Command