Three ways to import jar packages with jquery

In web development, if you want to use the jQuery JavaScript library, there are generally two ways: one is to introduce the jQuery JavaScript file through CDN, the other is to download the jQuery JavaScript file to the local, and then in the HTML page Introduced through the 3f1c4e4b6b16bbbd69b2ee476dc4f83a tag. However, if we want to use jQuery in a Java Web application, we need to package the jQuery JavaScript file into a .jar package and import it into the Java project. This article will introduce three common methods of importing the jQuery.jar package.

Method 1: Manual import

The first method is very simple, which is to drag the downloaded jQuery JavaScript file directly to the WebContent folder in the Java project. However, this method is very cumbersome. When other class libraries need to be imported, the process needs to be repeated, resulting in code redundancy.

Method 2: Use Maven

The second method is to use Maven to manage dependencies. In Java projects, we can use Maven to automatically manage related dependencies, including jQuery. Add the following dependencies in the project's pom.xml file:

<dependency>
    <groupId>org.webjars</groupId>
    <artifactId>jquery</artifactId>
    <version>3.3.1</version>
</dependency>

After adding the dependencies, Maven will automatically download the corresponding version of the jQuery.jar package and add it to the project's classpath. If you need to use another version of jQuery, just change the version value. This approach has the advantages of automation and centralization.

Method 3: Use WebJars

The third method is to use WebJars. WebJars is a method of packaging client Web libraries into Java .jar files and managing them through Maven. With WebJars, developers can easily use JavaScript, CSS, icons and other Web-related libraries in Java Web applications. When using WebJars, add the following dependencies to the pom.xml file:

<dependency>
    <groupId>org.webjars</groupId>
    <artifactId>jquery</artifactId>
    <version>3.3.1</version>
</dependency>

When using it, just reference it through the script tag in the HTML file:

<script src="/webjars/jquery/3.3.1/jquery.js"></script>

The above three methods are It can be well implemented to package jQuery into a .jar package and import it into a Java project. However, from the perspective of practicality and maintainability, it is recommended to use Maven or WebJars for dependency management. This can greatly reduce repeated work and unnecessary redundant code, making the code more elegant and readable. At the same time, Maven and WebJars can easily manage all dependencies, which provides great help for project management and maintenance.

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