Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you an introduction and usage of lombok, a tool necessary to improve development efficiency in springboot. The article is rich in content and analyzes and describes for you from a professional point of view. I hope you can get something after reading this article.

The benefits of using the lombok plug-in

We often have some routine and repetitive work in the java development process. For example:

Generate get and set methods based on member variables

Generate the constructor of a class based on member variables

Override the toString () and hashCode methods

The log framework logFactory is introduced to print logs.

The above are some repetitive actions, template code. Manual generation each time is a waste of time and adds a lot of redundant code. We can use the lombok plug-in to solve this problem. Our coding efficiency has been greatly improved!

How to install the lombok plug-in

The author takes InelliJ IDEA as an example to install the lombok plug-in. Open the File- > Settings panel of IDEA, select the Plugins option, and then click "Browse repositories". Type "lombok" in the search box, find lombok in the results, click install, and then restart IDEA.

We will also add the following dependencies to the pom.xml, and the plug-ins will take effect.

Org.projectlombok lombok true

There is no need to add a version number to the Spring Boot project, the spring Boot parent project will be managed on its behalf. If it is another project, please add your own version number!

Using lombok annotations to simplify the development of 4.1 Data annotations

Using the @ Data annotation on the java class will automatically generate for us at compile time

Get and set methods of member variables

Equals method

CanEqual method

HashCode method

ToString method

The left side of the image above is annotated with Data using lombok, and on the right is the decompilation result of the java bytecode class file.

4.2 Slf4j comments

The Logger log constant will be introduced automatically at compile time, and we can print the log directly using log.info or log.debug in our code. The red code in the following figure can be replaced with Slf4j annotations.

4.3 Builder comments

After using Builder annotations on the Java class, we can assign values to object properties using the following code

LombokPOJO lombokPOJO = LombokPOJO.builder () .name ("kobe") .age (39) .build ()

4.4 AllArgsConstructor comments

The AllArgsConstructor annotation will be automatically generated for us at compile time: the all-parameter constructor. If there are all-parameter constructor annotations, naturally there will be nonparametric constructor annotations: NoArgsConstructor comments.

Lombok has a lot of useful notes, so here are a few of them that are often used. For more usage, refer to github (plug-in installation diagram, with github connection, yellow area above)

The above is the introduction and usage of lombok, a tool necessary to improve development efficiency in springboot, which is shared by Xiaobi. if you happen to have similar doubts, please refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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