Explore the best practice of Modernizer Maven Plugin Annotations in the Java library
Modernizer Maven Plugin is a plugin used to analyze the Java class library. It can detect the API of the outdated (deprecated) used in the code and provide the corresponding alternative.The plug -in mainly marked the outdated API in the code by annotation, and generate warning information or error information during compilation.
When using Modernizer Maven Plugin for code analysis, the following is the best practice:
1. Introduce Modernizer Maven Plugin dependence
First of all, the dependence of Modernizer Maven Plugin is introduced in the pom.xml file of the project.Make sure that the following plug -in dependencies are added in the plug -in Plugins part of Build:
<plugin>
<groupId>org.moditect</groupId>
<artifactId>modernizer-maven-plugin</artifactId>
<version>1.0.1</version>
<executions>
<execution>
<goals>
<goal>modernizer</goal>
</goals>
<configuration>
<failOnError>true</failOnError>
</configuration>
</execution>
</executions>
</plugin>
2. Remember the time when the bid in the Java class library
In the Java class library, the outdated API is marked by using the annotations provided by Modernizer Maven Plugin.Usually, we use the annotation of `@deprecated` to mark outdated classes, methods, or fields.For example:
@Deprecated
public class DeprecatedClass {
//...
}
public class NewClass {
@Deprecated
public void deprecatedMethod() {
//...
}
public void newMethod() {
//...
}
}
In the above example, we marked an outdated class `deprecatedClass` and an outdated method` deprecatedMethod () `.
3. Run Modernizer Maven Plugin
Run the following command under the root directory of the project to execute the Modernizer Maven Plugin:
bash
mvn modernizer:modernizer
The command will analyze the code during the compilation and generate warning or error message, pointing out that the outdated API is used and a corresponding alternative solution is provided.
4. Processing warning and error message
Based on the warnings and error information generated by Modernizer Maven Plugin, we need to process the code accordingly.You can solve warnings and errors by replacing APIs, rewriting correlation methods, or using new APIs.
The following is an example. How to use Modernizer Maven Plugin to detect outdated API:
@Deprecated
public class DeprecatedClass {
public void deprecatedMethod() {
//...
}
}
public class MainClass {
public static void main(String[] args) {
DeprecatedClass deprecatedObj = new DeprecatedClass();
deprecatedObj.deprecatedMethod();
}
}
When we run the Modernizer Maven Plugin, it will generate a warning information, pointing out that we use outdated Api`DeprecatedMethod () `.At this point, we can replace it with a new API or adjust the code to solve the warning.
By adopting these best practices, we can make full use of the Modernizer Maven Plugin to analyze the outdated API in the Java class library and provide the corresponding alternative to improve the maintenance and performance of the code.
