以D盘下的tools_0808文件夹为例，打包的文件夹中必须存在MANIFEST.MF文件，存放的位置是

D:\tools_0808\META-INF\MANIFEST.MF。

dos命令如下：

D:\>jar cvfm tools_0808.jar tools_0808\META-INF\MANIFEST.MF -C tools_0808/  .

2.反编译jar

在jar  位置shift+鼠标右键    cmd打开

需要下载cfr-0.150.jar

java -jar cfr-0.150.jar flow.jar --outputdir d/soft/jar/flownew

https://www.cnblogs.com/passedbylove/p/7000644.html

--aexagg (boolean)--aexagg2 (boolean)--aggressivedoextension (boolean)--aggressivesizethreshold (int >= 0) default: 15000

--allowcorrecting (boolean) default: true

--analyseas (One of [DETECT, JAR, WAR, CLASS])--arrayiter (boolean) default: true if class file from version 49.0 (Java 5) or greater--caseinsensitivefs (boolean) default: true

--clobber (boolean)--collectioniter (boolean) default: true if class file from version 49.0 (Java 5) or greater--commentmonitors (boolean) default: false

--comments (boolean) default: true

--decodeenumswitch (boolean) default: true if class file from version 49.0 (Java 5) or greater

去除switch对枚举支持的语法糖--decodeenumswitch false

--decodefinally (boolean) default: true

--decodelambdas (boolean) default: true if class file from version 52.0 (Java 8) or greater

去除lambda表达式的语法糖--decodelambdas false

--decodestringswitch (boolean) default: true if class file from version 51.0 (Java 7) or greater--dumpclasspath (boolean) default: false

--eclipse (boolean) default: true

--elidescala (boolean) default: false

--extraclasspath (string)--forbidanonymousclasses (boolean) default: false

--forbidmethodscopedclasses (boolean) default: false

--forceclassfilever (string, specifying either java version as 'j6', 'j1.0', or classfile as '56', '56.65535')--forcecondpropagate (boolean)--forceexceptionprune (boolean)--forcereturningifs (boolean)--forcetopsort (boolean)--forcetopsortaggress (boolean)--forcetopsortnopull (boolean)--forloopaggcapture (boolean)--hidebridgemethods (boolean) default: true

--hidelangimports (boolean) default: true

--hidelongstrings (boolean) default: false

--hideutf (boolean) default: true

--ignoreexceptions (boolean) default: false

--ignoreexceptionsalways (boolean) default: false

--importfilter (string)--innerclasses (boolean) default: true

--instanceofpattern (boolean) default: true if class file from version 58.0 (Java 14) or greater, or experimental in 58.0 (Java 14)--j14classobj (boolean) default: false if class file from version 49.0 (Java 5) or greater--jarfilter (string)--labelledblocks (boolean) default: true

--lenient (boolean) default: false

--liftconstructorinit (boolean) default: true

--lomem (boolean) default: false

--methodname (string)--obfuscationpath (string)--outputdir (string)

结果输出目录--outputpath (string)--override (boolean) default: true if class file from version 50.0 (Java 6) or greater--previewfeatures (boolean) default: true

--pullcodecase (boolean) default: false

--recordtypes (boolean) default: true if class file from version 58.0 (Java 14) or greater, or experimental in 58.0 (Java 14)--recover (boolean) default: true

--recovertypeclash (boolean)--recovertypehints (boolean)--relinkconststring (boolean) default: true

--removebadgenerics (boolean) default: true去除泛型的语法糖--removebadgenerics false

--removeboilerplate (boolean) default: true

--removedeadconditionals (boolean)--removedeadmethods (boolean) default: true

--removeinnerclasssynthetics (boolean) default: true

--rename (boolean) default: false

--renamedupmembers (boolean) default: Value of option 'rename'

--renameenumidents (boolean) default: Value of option 'rename'

--renameillegalidents (boolean) default: Value of option 'rename'

--renamesmallmembers (int >= 0) default: 0

--showinferrable (boolean) default: false if class file from version 51.0 (Java 7) or greater--showversion (boolean) default: true

--silent (boolean) default: false

--skipbatchinnerclasses (boolean) default: true

--staticinitreturn (boolean) default: true

--stringbuffer (boolean) default: false if class file from version 49.0 (Java 5) or greater--stringbuilder (boolean) default: true if class file from version 49.0 (Java 5) or greater--stringconcat (boolean) default: true if class file from version 53.0 (Java 9) or greater--sugarasserts (boolean) default: true

--sugarboxing (boolean) default: true去除自动装箱和拆箱的语法糖--sugarboxing false

--sugarenums (boolean) default: true if class file from version 49.0 (Java 5) or greater

去除枚举的语法糖--sugarenums false

--switchexpression (boolean) default: true if class file from version 57.0 (Java 13) or greater, or experimental in 56.0 (Java 12)--tidymonitors (boolean) default: true

--tryresources (boolean) default: true if class file from version 51.0 (Java 7) or greater--usenametable (boolean) default: true

--usesignatures (boolean) default: true

--help (string)

idea反编译jar

找到idea安装目录   plugins, 找到java-decompiler.jar

D:\soft\idea\plugins\java-decompiler\lib

创建目录