基于mozilla的js.jar包定义javascript的解析ScriptTool脚本工具类实现执...

package test;

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

import org.mozilla.javascript.Context;

import org.mozilla.javascript.Function;

import org.mozilla.javascript.Scriptable;

public class ScriptTool {

    /**

     * @see 执行js函数,返回js函数执行结果

     * @param jsFile

     * @param funName

     * @param args

     * @return

     */

    public static Object callFunction(String jsFile,String funName,Object[] args){

           String jsPath = jsFile;

            String jsFunction = funName;

            Object result=null;

            Context cx = Context.enter();

            java.io.FileReader fr = null;

            try {

                Scriptable scope = cx.initStandardObjects();

                fr = new java.io.FileReader(jsPath);

                cx.evaluateReader(scope, fr, '<cmd>', 1, null);

                Object fObj = scope.get(jsFunction, scope);

                if (!(fObj instanceof Function)) {

                    System.out.println('Function not found' +jsFunction);

                } else {

                    Function f = (Function)fObj;

                    result = f.call(cx, scope, scope, args);

                    System.out.println('return：'+Context.toString(result));

                }

            } 

            catch(Exception e){

                e.printStackTrace();

            }

            finally {

                Context.exit();

                if(fr != null)

                    try {

                        fr.close();

                    } catch (IOException e) {

                        e.printStackTrace();

                    }

            }

        return result;

    }

    /**

     * @see 执行出入的js串,返回变量值Map

     * @param jString

     * @param varNames 返回map中变量名称

     * @return Map 变量值

     */

    public static Map eval(String jString,String[] varNames){

         Map result=new HashMap();

         Context cx = Context.enter();

            try {

                Scriptable scope = cx.initStandardObjects();

                cx.evaluateString(scope, jString, '<cmd>', 1, null);

                for(int i=0;i<varNames.length;i++){

                    result.put(varNames[i],scope.get(varNames[i], scope));

                }

                

            } 

            catch(Exception e){

                e.printStackTrace();

            }

            finally {

                Context.exit();

            }

        return result;

    }

    public static void main(String[] args) {

         

        try {

            //执行js函数

            String jsFile='c:\\temp\\mactest.js';

            String funName='mactest';

            Object[] arges={'m1','m2'};

            Object result=ScriptTool.callFunction(jsFile, funName, arges);

            System.out.println(result);

             

            //执行js脚本

            StringBuffer jString=new StringBuffer();

            jString.append('var i=1;');

            jString.append('var j=2;');

            jString.append('var c=(i+j)*100;');

            Map varsMap=ScriptTool.eval(jString.toString(),new String[]{'i','j','c'});

            System.out.println(varsMap);

         

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}