java jdk 替换本地类文件

发布于 2025-01-08 18:07:28 字数 407 浏览 3 评论 0原文

我有 ImageView.class 如何让程序使用它而不是本机 javax.swing.text.html.ImageView？

javax.swing.text.html.ImageView map = new javax.swing.text.html.ImageView(); //does not work

有人告诉我有必要使用 ClassFileTransformer 和 ClassLoader，但我找不到有效的示例

原文

I have ImageView.class how to get the program to use it instead of the native javax.swing.text.html.ImageView?

javax.swing.text.html.ImageView map = new javax.swing.text.html.ImageView(); //does not work

I was told that it is necessary to use ClassFileTransformer and ClassLoader, but I can not find a working examples

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

还给你自由 2025-01-15 18:07:28

我认为你真正想做的是......

扩展 HTMLEditorKit 并覆盖 getViewFactory()
让它返回一个扩展 HTMLEditorKit.HTMLFactory 的类code>
在该类中，重写 create() 以返回的自定义视图。和 super.create() 否则

像这样：

class MyImageKit extends HTMLEditorKit {
    private static final MyImageFactory myFactory = new MyImageFactory();

    public ViewFactory getViewFactory() {
        return myFactory;
    }

    static class MyImageFactory extends HTMLFactory {
        public View create(Element elem) {
            Object type = elem.getAttributes()
                              .getAttribute(StyleConstants.NameAttribute);
            if(type == HTML.Tag.IMG) {
                return new MyImageView(elem);
            } else {
                return super.create(elem);
            }
        }
    }
}

class MyImageView extends ImageView {
    MyImageView(Element elem) {
        super(elem);
    }

    protected void setPropertiesFromAttributes() {
        super.setPropertiesFromAttributes();
        try {
            ImageView.class.getDeclaredField("vAlign").set(this, new Float(0.75f));
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
}

I think that what you really want to do is to...

Extend HTMLEditorKit and override getViewFactory()
Have it return a class that extends HTMLEditorKit.HTMLFactory
In that class, override create() to return your custom view for <img> and super.create() otherwise

Like this:

class MyImageKit extends HTMLEditorKit {
    private static final MyImageFactory myFactory = new MyImageFactory();

    public ViewFactory getViewFactory() {
        return myFactory;
    }

    static class MyImageFactory extends HTMLFactory {
        public View create(Element elem) {
            Object type = elem.getAttributes()
                              .getAttribute(StyleConstants.NameAttribute);
            if(type == HTML.Tag.IMG) {
                return new MyImageView(elem);
            } else {
                return super.create(elem);
            }
        }
    }
}

class MyImageView extends ImageView {
    MyImageView(Element elem) {
        super(elem);
    }

    protected void setPropertiesFromAttributes() {
        super.setPropertiesFromAttributes();
        try {
            ImageView.class.getDeclaredField("vAlign").set(this, new Float(0.75f));
        } catch(Exception e) {
            e.printStackTrace();
        }
    }
}

回复收藏 0 原文

~没有更多了~