How to split my java application into multiple jars based on modules

[monicka rk akilan]

I have one java web application developed in spring. Now i want to split the application into multiple jars based on modules for different customer requirement.

I followed package structure for different modules like

com.domain.abc.controller
com.domain.abc.service
com.domain.abc.dao

com.domain.xyz.controller
com.domain.xyz.service
com.domain.xyz.dao

I want to make these into two jars based on the module also having some packages and login module.

Am using Eclipse and ANT

I don't know how and where to start. Please advice me.

Advance Thanks for your valuable comments.

[Bill Gorder]

I suggest using Maven instead of ANT. Its much less verbose and handles multi-module projects like this very easily. Either direction you go this is really a build tools question so I will move it to a more appropriate forum for you.

[Stephan van Hulst]

monicka rk akilan wrote:I want to make these into two jars based on the module also having some packages and login module.

What do you mean by this sentence?

Anyway, like Bill said, Maven is the way to go. Create a directory structure like this:

Project/
  Abc/
    src/main/java/com/domain/abc/controller/
    src/main/java/com/domain/abc/service/
    src/main/java/com/domain/abc/dao/
    pom.xml
  
  Xyz/
    src/main/java/com/domain/xyz/controller/
    src/main/java/com/domain/xyz/service/
    src/main/java/com/domain/xyz/dao/
    pom.xml

  pom.xml

Then your modules' pom files should look something like this:<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation= "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" > <modelVersion>4.0.0</modelVersion> <groupId>com.domain</groupId> <artifactId>abc</artifactId> <packaging>jar</packaging> <name>Abc</name> <parent> <groupId>com.domain</groupId> <artifactId>myproject</artifactId> <version>0.1.0</version> </parent> </project>
The project's pom should look like this:<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation= "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" > <modelVersion>4.0.0</modelVersion> <groupId>com.domain</groupId> <artifactId>myproject</artifactId> <version>0.1.0</version> <packaging>pom</packaging> <name>My project</name> <modules> <module>Abc</module> <module>Xyz</module> </modules> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> </project>
After you've installed Maven, you can just open a command prompt in your project folder, and run mvn package, and a jar of each of your modules should appear in the target folder of that module, e.g. Project/Abc/target/abc-0.1.0.jar.