js引擎计算字符串算术表达式

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


/**
 * @author   James
 * @creation 2016年8月20日 下午8:30:15
 *
 */
public class JS {

    /**
     * @param args
     * @throws ScriptException
     */
    public static void main(String[] args) throws ScriptException {
        // TODO Auto-generated method stub
        String str = "2+3*2";
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("js");
        Object result = engine.eval(str);
        System.out.println("结果类型:" + result.getClass().getName() + ",计算结果:" + result);

    }
}