How does Java execute Groovy scripts?

Executing Groovy scripts in Java can be achieved by following these steps:

1. To include Groovy library dependencies: First, you need to add Groovy library dependencies to your project, which can be done through build tools such as Maven or Gradle.
2. Create a GroovyShell object: Utilize Groovy’s GroovyShell class to run Groovy scripts. With the GroovyShell object, you can load and execute Groovy scripts.
3. Load the Groovy script file: Use the parse() method of GroovyShell to load the Groovy script file.
4. Execute Groovy script: Use the evaluate() method of the GroovyShell object to run the loaded Groovy script.

Here is a simple example code:

import groovy.lang.GroovyShell;
import groovy.lang.Binding;

public class ExecuteGroovyScript {
    public static void main(String[] args) {
        GroovyShell shell = new GroovyShell();

        // 加载Groovy脚本文件
        shell.parse(new File("path/to/your/groovy/script.groovy"));

        // 执行Groovy脚本
        shell.evaluate("println 'Hello, Groovy!'");
    }
}

In the example above, a GroovyShell object is first created, then a Groovy script file is loaded using the parse() method, and finally the evaluate() method is used to execute the Groovy script. You can modify the code according to your specific requirements to execute other Groovy scripts.