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How to understand the Maven command? in view of this problem, this article introduces the corresponding analysis and answer in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

1. Create a Maven project

①, create a new package com.ys.maven in src/main/java, and then create a class HelloMaven.java in this package

Package com.ys.maven;public class HelloMaven {/ / pass in a string and return public String Hello (String name) {return name;}}

②, create a new package com.ys.maven in src/test/java, and then create a class HelloTest.java in this package

Package com.ys.maven;import junit.framework.Assert;import org.junit.Test;public class HelloTest {@ Test public void testHello () {HelloMaven he = new HelloMaven (); String name = he.Hello ("Tom"); / / determine whether the parameter passed by Hello is "maven" Assert.assertEquals ("maven", name);}}

The ③ and pom.xml files are as follows:

4.0.0 com.ys hellomaven 0.0.1-SNAPSHOT junit junit 4.0 test

Why is it written in this way? we will explain it in detail later.

2. The common commands of Maven: 1. Mvn compile compiles Java source programs into class bytecode files. 2. Mvn test test and generate test report 3. Mvn clean deletes the old class bytecode file compiled before. 4, mvn pakage package, dynamic web project war package, Java project jar package. 5. Mvn install puts the project generation jar package in the warehouse so that other modules can call ① and compile: compile the Java source program into a class bytecode file.

Step 1: select the pom.xml file, right-> Run As-> 2 Maven build...

Step 2: in the dialog box that pops up after the first step, type compile, and then click the Run button

Step 3: view the console

Step 4: in the target directory, we will find the compiled class file

②, test: testing and generating test reports

Step 1: select the pom.xml file, right-> Run As-> 2 Maven build..., and enter test in the pop-up box

Or select the pom.xml file, right-click-> Run As- > 6 Maven test, as shown below

Step 2: view the console

To analyze the test program, the parameter we pass in is Tom, and what we want is maven, which is obviously not equal, so the test fails

If the test class HelloTest.java is changed to the following:

Re-execute the mvn test command on the console as follows:

The generated test report can be viewed in the following directory: target/surefire-reports

③ and mvn clean delete the old class bytecode files that were previously compiled

Step 1: select the pom.xml file, right-> Run As-> 2 Maven build..., and enter clean in the pop-up box

Or select the pom.xml file, right-click-> Run As- > 3 Maven clean, as shown below

Step 2: view the console

Step 3: find that the mvn compile compiled files have been cleared by this time

④, mvn pakage package, dynamic web project war package, Java project jar package.

Step 1: select the pom.xml file, right-> Run As-> 2 Maven build..., and enter package in the pop-up box

Step 2: view the console

Step 3: enter the target directory and you will find the typed jar package

⑤ and mvn install put the project-generated jar package in the repository so that other modules can call

We will not take a screenshot here. After executing the command, go to the repository configured in the settings.xml file, and you will find the generated jar package.

The answer to the question about how to understand the Maven command is shared here. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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