Maven：如何从传递 arguments 的命令行运行 a.java 文件

Question

I have the following problem. I would like to run mvn from command line for a Main.java file. Main.java accepts a parameter. How do I do that from command line?

I tried finding an example but I was not successful. Could someone help me by giving me an example of that?

I looked here but didn't quite understand what I should do.

Also, how do I execute that command from a different folder than the Main.java folder?

for example the Main.java is located in my/java/program/Main.java . What should I put in

mvn exec:java -Dexec.mainClass="what to put here?" -Dexec.args="arg0 arg1 arg2"

Answer 1

You could run: mvn exec:exec -Dexec.args="arg1" .

This will pass the argument arg1 to your program.

You should specify the main class fully qualified, for example, a Main.java that is in a package test would need

mvn exec:java  -Dexec.mainClass=test.Main

By using the -f parameter, as decribed here , you can also run it from other directories.

mvn exec:java -Dexec.mainClass=test.Main -f folder/pom.xm

For multiple arguments, simply separate them with a space as you would at the command line.

mvn exec:java -Dexec.mainClass=test.Main -Dexec.args="arg1 arg2 arg3"

For arguments separated with a space , you can group using 'argument separated with space' inside the quotation marks.

mvn exec:java -Dexec.mainClass=test.Main -Dexec.args="'argument separated with space' 'another one'"

Answer 2

除了使用mvn exec:java运行它之外，您还可以使用mvn exec:exec运行它

mvn exec:exec -Dexec.executable="java" -Dexec.args="-classpath %classpath your.package.MainClass"

Answer 3

Adding a shell script eg run.sh makes it much more easier:

#!/usr/bin/env bash
export JAVA_PROGRAM_ARGS=`echo "$@"`
mvn exec:java -Dexec.mainClass="test.Main" -Dexec.args="$JAVA_PROGRAM_ARGS"

Then you are able to execute:

./run.sh arg1 arg2 arg3

Answer 4

Take a look at the maven-exec-plugin . Used properly, you can make it compile your java class and then simply execute java with the compiled class on the classpath. To launch, all you would have to do is use

mvn exec:exec

Answer 5

this aproach is half line command, half.pom file. you can put your args in a plugin inside the <build> </build> tag like this

<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>exec-maven-plugin</artifactId>
    <version>3.0.0</version>
    <configuration>
        <mainClass>%classpath your.package.MainClass</mainClass>
        <arguments>
            <argument>your_arg</argument>
        </arguments>
    </configuration>
</plugin>

now your arg is in the pom file. then just execute this in the command line

mvn clean compile exec:java

you can put many args:

       <arguments>
            <argument>your_arg1</argument>
            <argument>your_arg2</argument>
            <argument>your_arg3</argument>
        </arguments>