import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.IOException;

import java.io.InputStream;

import java.util.Date;

import org.apache.commons.io.IOUtils;

import org.apache.commons.lang.Validate;

import org.mozilla.javascript.Context;

import org.mozilla.javascript.ContextFactory;

import org.mozilla.javascript.Function;

import org.mozilla.javascript.Scriptable;

public class RhinoScaper {

    private Context context;

    private Scriptable scriptable;

    /**

     * 初始化方法

     */

    public void init() {

        context = ContextFactory.getGlobal().enterContext();

        scriptable = context.initStandardObjects(null);

        context.setOptimizationLevel(-1);

        context.setLanguageVersion(Context.VERSION_1_5);

        context.evaluateString(scriptable, "var v='sssaass';"

                + "var print = function(v) {"

                + " java.lang.System.out.println(v);return v ;"

                + " };function hah(){return v }", "print", 1, null);

        String files = "envjs-1.2.js,jquery.js,自己的js";

        String[] file = files.split(",");

        for (String f : file) {

            evaluateJs(f);

        }

    }

    /**

     * 调用函数

     *

     * @param functionName

     * @param functionArags

     * @return

     */

    public Object invokFunction(String functionName, Object... functionArags) {

        Validate.notNull(context, "context is null");

        Validate.notNull(scriptable, "scriptable is null");

        Function function = (Function) scriptable.get(functionName, scriptable);

        Object call = function.call(Context.getCurrentContext(), scriptable,

                function, functionArags);

        // System.out.println("reslult  = "+call.toString());

        return call;

    }

    public void evaluateJs(String f) {

        Validate.notNull(context, "context is null");

        Validate.notNull(scriptable, "scriptable is null");

        FileReader in = null;

        try {

            in = new FileReader(f);

            context.evaluateReader(scriptable, in, f, 1, null);

        } catch (FileNotFoundException e1) {

            // e1.printStackTrace();

            throw new RuntimeException("unknown file " + f);

        } catch (IOException e1) {

            e1.printStackTrace();

        } finally {

            // close(in);

            IOUtils.closeQuietly(in);

        }

    }

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

        RhinoScaper rhinoScaper = new RhinoScaper();

        rhinoScaper.init();

        String param1= "";//参数1
　　　　 String param2="";//参数2

        Object result = rhinoScaper.invokFunction("函数名称", param1,

                param2);

        System.out.println(result);

    }

    /**

     * 加载js文件

     *

     * @param sourceName

     *            名称

     * @param classpathURI

     *            文件路径

     */

    public void loadJS(String sourceName, String classpathURI) {

        Validate.notNull(context, "context is null");

        Validate.notNull(scriptable, "scriptable is null");

        String js = null;

        InputStream inputStream = null;

        try {

            inputStream = getClass().getResourceAsStream(classpathURI);

            js = IOUtils.toString(inputStream, "UTF-8");// 设置默认js文件编码为utf-8

        } catch (IOException e) {

            e.printStackTrace();

        } finally {

            IOUtils.closeQuietly(inputStream);

        }

        context.evaluateString(scriptable, js, sourceName, 1, null);

    }

    /**

     * 加载js字符串

     *

     * @param source

     *            js字符串（注意处理js中由于变量名为throws，float类似名称导致的报错）

     * @param sourceName

     *            名称

     */

    public void JSloadString(String source, String sourceName) {

        Validate.notNull(context, "context is null");

        Validate.notNull(scriptable, "scriptable is null");

        context.evaluateString(scriptable, source, sourceName, 1, null);

    }

}