How to get maven dependency tree programmatically

Question

want to print maven dependency tree (all the dependencies including transitive dependencies) programmatically by just reading pom.xml file without connecting to remote repository.

Answer 1

Not really possible, sorry. Also, have you checked the answer and comments here? How can you display the Maven dependency tree for the *plugins* in your project?

Answer 2

I can recommend to take a look at the maven resolver project which has some example code which might be sufficient as a starting point:

https://github.com/apache/maven-resolver/tree/master/maven-resolver-demos/maven-resolver-demo-snippets/src/main/java/org/apache/maven/resolver/examples

Answer 3

You can do this by using ProcessBuilder to retrieve the result of maven's dependency:tree command.

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public static void main(String[] args) {

    ProcessBuilder processBuilder = new ProcessBuilder();
    processBuilder.command("cmd.exe", "/c", "mvn -f \"C:\\myprojectpath\"", "dependency:tree");

    try {

        Process process = processBuilder.start();
        BufferedReader reader =
                new BufferedReader(new InputStreamReader(process.getInputStream()));

        String line;
        while ((line = reader.readLine()) != null) {
            System.out.println(line);
        }

        int exitCode = process.waitFor();
        System.out.println("\nExited with error code : " + exitCode);

    } catch (IOException e) {
        e.printStackTrace();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }

}

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