java調用javascript

一、

package ScriptEngine;


import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStreamReader;

import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class EngineTest {
public static void main(String[] args) throws ScriptException, FileNotFoundException, NoSuchMethodException {
	ScriptEngineManager xEngineManager=new ScriptEngineManager();
	ScriptEngine engine=xEngineManager.getEngineByName("JavaScript");
	String arg1="q";
	engine.put(arg1,1555);
	engine.eval("a=2");
	Object object=engine.eval("x=2*a-5+q");
	System.out.println(object);
	InputStreamReader isr= new InputStreamReader(new FileInputStream(new File("E:\\自學文件\\javaOb\\test\\src\\ScriptEngine\\a.js")));
	engine.eval(isr);
	Object object2=((Invocable) engine).invokeFunction("addFun", 1,2);
	System.out.println(object2);

}
}

a.js

function addFun(a, b){
return a+b;
}

二、編譯

package ScriptEngine;


import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStreamReader;

import javax.script.Compilable;
import javax.script.CompiledScript;
import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class EngineTest {
public static void main(String[] args) throws ScriptException, FileNotFoundException, NoSuchMethodException {
	ScriptEngineManager xEngineManager=new ScriptEngineManager();
	ScriptEngine engine=xEngineManager.getEngineByName("JavaScript");
	InputStreamReader isrt= new InputStreamReader(new FileInputStream(new File("E:\\自學文件\\javaOb\\test\\src\\ScriptEngine\\b.js")));
	
	CompiledScript script= ((Compilable)engine).compile(isrt);
	Object object3=	script.eval();
	System.out.println(object3);
	

}
}