执行Groovy脚本的工具类

groovy?

import java.io.File;
import java.net.URL;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import groovy.lang.GroovyClassLoader;
import groovy.lang.GroovyCodeSource;
import groovy.lang.Script;

@SuppressWarnings({ "rawtypes","unchecked" })
public class GroovyCompiler {
    
    private static Map<String,GroovyClass> groovyCaches      = new ConcurrentHashMap<String,GroovyClass>();

    private static ClassLoader cl = GroovyCompiler.class.getClassLoader();  
    private static  GroovyClassLoader groovyCl = new GroovyClassLoader(cl);  
    
    public static GroovyClass getClass(File script){
        
        if(script == null || !script.exists()){
            return null;
        }
        
        try {
            
            String fileName = script.getPath() ;
            GroovyClass groovyClazz = groovyCaches.get(fileName);
            
            //cached,check if modified 
            if(groovyClazz != null){
                long lastModified = script.lastModified();
                
                //newest
                if(lastModified <= groovyClazz.getLastmodified() ){
                    return groovyClazz;
                }
                
                //update cache
                groovyClazz = null;
            }
            
            //need new a Instance
            //not use GroovyClassLoader cache
            Class<?> groovyClass = groovyCl.parseClass(new GroovyCodeSource(script,"UTF-8"),false);  
            groovyClazz = new GroovyClass((Script)groovyClass.newInstance(),script.lastModified());
            
            groovyCaches.put(fileName,groovyClazz);
            
            return groovyClazz;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
    
    public static GroovyClass getClass(URL script){
        
        return getClass(new File(script.getFile()));
    }
    
    public static GroovyClass getClass(String script){
        
        return getClass(cl.getResource(script));
    }
    
    public static class GroovyClass {
        
        public GroovyClass(){
            
        }
        
        public GroovyClass(Script script,long lastmodified){
            this.script = script;
            this.lastmodified = lastmodified;
        }
        
        Script script;
        
        long lastmodified = 0;

        
        public Script getScript() {
            return script;
        }

        public void setScript(Script script) {
            this.script = script;
        }

        public long getLastmodified() {
            return lastmodified;
        }

        public void setLastmodified(long lastmodified) {
            this.lastmodified = lastmodified;
        }

        public Object invoke(String methosName,Object[] args) {
            return script.invokeMethod(methosName,args);
        }

        public Object get() {
            return script.run();
        }

        public Object get(Map binds) {
            script.getBinding().getVariables().putAll(binds);
            Object obj = script.run();
            return obj;
        }    

    }
        
}

使用

public class GroovyKest {
    
    public static void main(String[] args) throws Exception {
        
        GroovyClass groovy = GroovyCompiler.getClass("script/view.groovy");
        
        Map <String,String> context = new HashMap<>();
        context.put("name","kan");
        
        Object obj  = groovy.get(context);

        System.out.println(obj);
        
    }

}