No more /src/main/webapp/vendor/jquery.min.js, or /styles/bootstrap.css! Just a Maven dependency like the other libraries. WebJars are client-side web libraries (e.g. jQuery & Bootstrap) packaged into JAR (Java Archive) files.

Why?

Maven is great on managing jars, but not so good for static web dependencies like CSS or JS files packaged in a zip. With Webjars you can have AngularJS or Bootstrap in your pom.xml, like you did with Bower on a web project.

How?

maven pom.xml (manage web dependencies)

<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.damienfremont.blog</groupId>
  <artifactId>20151007-javaee-webjars</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
 
  <dependencies>
     
    <!-- WEB DEPENDENCIES -->
    <dependency>
      <groupId>org.webjars</groupId>
      <artifactId>bootstrap</artifactId>
      <version>3.3.5</version>
    </dependency>
    <dependency>
      <groupId>org.webjars</groupId>
      <artifactId>jquery</artifactId>
      <version>2.1.4</version>
    </dependency>
 
    <!-- WEB DEPENDENCIES SERVLET -->
    <dependency>
      <groupId>org.webjars</groupId>
      <artifactId>webjars-servlet-2.x</artifactId>
      <version>1.1</version>
    </dependency>
 
  </dependencies>
</project>

webapp web.xml (declare webjars servlet)

index.html (standard example, use webjars paths)

<!DOCTYPE html>
<head>
  <!-- ADD ALL YOUR CSS DEPENDENCIES HERE... -->
  <link rel="stylesheet" href="webjars/bootstrap/3.3.5/css/bootstrap.css">
</head>
<body>
 
  <!-- DO YOUR THING HERE... -->
  Hello world!
 
  <!-- ADD ALL YOUR JS DEPENDENCIES HERE... -->
  <script src="webjars/jquery/2.1.4/jquery.js"></script>
  <script src="webjars/bootstrap/3.3.5/js/bootstrap.js"></script>
</body>
</html>