如何以编程方式获取 maven 依赖树

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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