Jar version conflict resolution

background

In the process of bank channel connection , Some channels rely on their own encryption and decryption sdk Or algorithm for data encryption transmission , Some come with them sdk And underlying dependencies jar There will be version conflicts (A Bank SDK rely on 0.0.1 Of jar a,B Of the bank jar Version depends on 0.0.5 Of jar a), It is uncertain whether the corresponding bank has any dependence jar Under the premise of personalized development and optimization , because maven The reason for version management , If you do not distinguish between versions , This will lead to the wrong introduction of a lower version of jar, As a result, multiple channels cannot be shared , This article is to deal with a compromise solution under this premise .

Treatment scheme

The main solution is ： By modifying the corresponding conflict jar The root package prefix of is the same as maven Upper groupId、artifactId and version, So as to distinguish the dependence of each channel jar

It's about tools

jarjar.jar
jd-gui.exe

Processing steps

1. new directory , hold jarjar.jar And what needs to be adjusted jar Put it in the directory ：

2. newly added rule.txt file , The content of the document is ：

（ The original root package name uses the decompiler jd-gui.exe Open view ）
rule  Original package name .**  Target package name [email protected]
 Such as ：rule org.bouncycastle.** [email protected]

3. Use cmd Switch to the current directory ：

4. stay cmd Execute the following command under the window ：

java -jar jarjar.jar process rule.txt  What needs to be revised .jar  The modified .jar( The modified jar Name customization ) 
 Such as ： java -jar jarjar.jar process rule.txt bcpg-jdk15on-1.64.jar test.bcpg-jdk15on-1.64.jar

5. Generated new test.bcpg-jdk15on-1.64.jar Use jd-gui.exe Decompile and discover , all class The root package of the file has been changed to dbs.org.bouncycastle start ：

original jar Package root package name

The goal is jar Package root package name

6. Log on to remote maven Private clothes , Then use the upload function , In this way, the project can pass maven The way to manage .