Question

我想在我的java webbrowser中添加javascript启用窗格。我听说过Rhinno，v8等javaScript引擎但不知道如何使用它。是否有任何关于他们实现这个的教程的链接，因为我是java的新手。或者你能给我发送下载JWebPane的链接。谢谢

Answer 1

用法非常简单

public static void main(String[] args) {
   ScriptEngineManager mgr = new ScriptEngineManager();
   ScriptEngine engine = mgr.getEngineByName("JavaScript");
   try {
       engine.eval("print('Hello, world!')");
   } catch (ScriptException ex) {
       ex.printStackTrace();
   }
 }

最佳文档位于Mozilla的网站http://www.mozilla.org/rhino/doc.html

Answer 2

听起来你正在编写或修改用Java编写的Web浏览器，但它还没有JavaScript解释器功能。如果是这样，那么Rhino可能是最容易添加它的东西。

有很多关于如何在Mozilla Rhino examples page上使用它的例子。 Rhino非常容易调用，正如this example所示：

/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Rhino code, released
 * May 6, 1998.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License Version 2 or later (the "GPL"), in which
 * case the provisions of the GPL are applicable instead of those above. If
 * you wish to allow use of your version of this file only under the terms of
 * the GPL and not to allow others to use your version of this file under the
 * MPL, indicate your decision by deleting the provisions above and replacing
 * them with the notice and other provisions required by the GPL. If you do
 * not delete the provisions above, a recipient may use your version of this
 * file under either the MPL or the GPL.
 *
 * ***** END LICENSE BLOCK ***** */

import org.mozilla.javascript.*;

/**
 * RunScript: simplest example of controlling execution of Rhino.
 *
 * Collects its arguments from the command line, executes the
 * script, and prints the result.
 *
 * @author Norris Boyd
 */
public class RunScript {
    public static void main(String args[])
    {
        // Creates and enters a Context. The Context stores information
        // about the execution environment of a script.
        Context cx = Context.enter();
        try {
            // Initialize the standard objects (Object, Function, etc.)
            // This must be done before scripts can be executed. Returns
            // a scope object that we use in later calls.
            Scriptable scope = cx.initStandardObjects();

            // Collect the arguments into a single string.
            String s = "";
            for (int i=0; i < args.length; i++) {
                s += args[i];
            }

            // Now evaluate the string we've colected.
            Object result = cx.evaluateString(scope, s, "<cmd>", 1, null);

            // Convert the result to a string and print it.
            System.err.println(Context.toString(result));

        } finally {
            // Exit from the context.
            Context.exit();
        }
    }
}

因此，当设置执行网页中包含的JavaScript时，您需要将各种环境对象（document等）添加到scope对象，然后使用evaluateString评估它。

这将是 非常重要的任务 。如果您还是Java新手，我建议您从较小的东西开始。

JavaScript引擎基于java或jwebpane下载链接

2 个答案: