java中执行groovy脚本

1、依赖

<dependency>
    <groupId>org.codehaus.groovy</groupId>
    <artifactId>groovy-all</artifactId>
    <version>3.0.9</version>
    <type>pom</type>
</dependency>

2、工具类

package com.example.datacollector.support.groovy;

import cn.hutool.core.map.MapUtil;
import groovy.lang.GroovyClassLoader;
import groovy.lang.GroovyObject;
import lombok.extern.slf4j.Slf4j;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * GroovyExecutorUtil
 *
 * @author ygr
 * @date 2021/11/29 23:29
 */
@Slf4j
public class GroovyExecutorUtil {

    private static final GroovyClassLoader CLASS_LOADER = new GroovyClassLoader();

    public static Object execute(String scriptText, String methodName, Map<String, Object> contextParams, Object... args)
            throws Exception {
        Class<?> groovyClass = CLASS_LOADER.parseClass(scriptText);
        GroovyObject groovyObject = (GroovyObject) groovyClass.newInstance();
        if (MapUtil.isNotEmpty(contextParams)) {
            // 将map中的值设置为脚本属性，在脚本中可以直接调用
            contextParams.forEach(groovyObject::setProperty);
        }
        return groovyObject.invokeMethod(methodName, args);
    }
}

3、测试

public static void main(String[] args) throws Exception {

    String content = "import cn.hutool.core.util.StrUtil\n" +
        "\n" +
        "\n" +
        "def sayHello(name) {\n" +
        "    println date?.getTime()\n" +
        "    println(\"my name is $name\");\n" +
        "    def reverse = StrUtil.reverse(\"hello\")\n" +
        "    println reverse\n" +
        "    def list = []\n" +
        "    if(list) {\n" +
        "       println 'not empty'\n" +
        "    } else {\n" +
        "       println 'empty~'\n" +
        "    }\n" +
        "    def obj = [name:'jack',detail:[[roleName:'admin']]]\n" +
        "    def role = obj.detail?[0]?.roleName\n" +
        "    println role\n" +
        "    obj.age = 20\n" +
        "    println obj\n" +
        "    \"success\"\n" +
        "}";

    Map<String, Object> params = new HashMap<>();
    params.put("date", new Date());
    long start = System.currentTimeMillis();

    Object execute = GroovyExecutorUtil.execute(content, "sayHello", params, "ygr");
    System.out.println(System.currentTimeMillis() - start);

    System.out.println(execute);
    /*输出结果如下
    1638669552206
    my name is ygr
    olleh
    empty~
    admin
    [name:jack, detail:[[roleName:admin]], age:20]
    885
    success
    */
}