Java 用<；html>；JScrollPane内的标记-删除水平条功能/逻辑

我的要求是使用

JLabel

进行单词包装（就像

JTextArea

所做的那样）

考虑以下代码：

public class WrapTest extends JFrame {

    public WrapTest() {
        super("test");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setLayout(new BorderLayout());

        JLabel label = new JLabel("Lorem <b>ipsum</b> dolor sit amet, consectetur adipiscing elit. "
                + "Aliquam non pellentesque enim. Donec nec nisl tortor."
                + " Curabitur rutrum molestie est eget varius. Nullam ut lacinia est."
                + " Phasellus hendrerit sollicitudin justo, vitae malesuada dolor vestibulum at."
                + " Integer pharetra purus sed ipsum pulvinar, et pretium odio volutpat. Donec vitae varius metus."
                + " Cras sagittis vulputate erat, at faucibus lectus faucibus id. Cras varius nunc eu felis tristique dapibus."
                + " Aenean enim eros, dapibus pellentesque nibh ut, efficitur malesuada sapien. Nullam imperdiet nunc velit,"
                + "sed laoreet massa mattis eget. Morbi id justo quis sapien aliquet bibendum sed at leo. In mi felis, consectetur"
                + " sed orci eget, tempus maximus turpis. Curabitur sed felis id nisl vehicula sollicitudin sed eget erat.Ut sagittis at nisi sed facilisis."
                + " Morbi vel felis ac diam molestie consequat. Sed nisl lectus, sollicitudin at neque in, "
                + "placerat aliquet nunc. Maecenas quis enim vitae nunc fermentum congue. Sed posuere quam a ultricies fringilla."
                + " Vivamus aliquam nunc lacus, vitae consectetur tortor consequat ut. Cras viverra mi sit amet magna auctor eleifend."
                + " Morbi in risus nisl. Praesent nunc dolor, lobortis nec ultricies aliquet, sollicitudin eu sapien. Fusce interdum ac leo non suscipit."
                + "Vivamus at viverra elit, ut vestibulum elit. Sed bibendum, lorem et ornare sagittis, erat nulla ultricies odio, quis iaculis lacus nisl "
                + "vel ligula. Sed iaculis elit eu felis consectetur dignissim. ");

        add(label, BorderLayout.CENTER);

        setLocationByPlatform(true);
        setSize(500, 200);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            new WrapTest().setVisible(true);
        });
    }
}

我们得出以下结果：

这同样使文本无法阅读。使用

sp.setHorizontalScrollBarPolicy（ScrollPaneConstants.HorizontalScrollBar\u NEVER）

将使滚动条消失，文本保持水平方向

在这种情况下，有没有办法删除单杠的全部功能？我希望标签可以垂直滚动，并具有单词包装功能。就像一个

JTextArea

一样，其行为如下：

我坚持使用

JLabel

的原因是易于呈现HTML标记

---

我试图通过更改组件的

preferredSize

和/或

maximumSize

来解决这个问题，但没有得到想要的结果。我尝试的其他方法是使用

或Xpx，但它们也有其他问题。有道理，当帧变大时，它们不会被调整。

您是否尝试过：

sp.setVerticalScrollBarPolicy（JScrollPane.VERTICAL\u SCROLLBAR\u ALWAYS）

否则，您可以尝试使用支持HTML内容的JEditorPane。然后可以将其放置在JScrollPane中。
我相信您可以使用
JEditorPane
或
JTextArea
来禁用编辑，并将其用作容器，以所需换行方式显示文本

但是如果您坚持使用
JLabel
的换行并支持垂直滚动，我相信您需要在用户调整帧大小时计算可滚动视口容器的大小：

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;

public class WrappedLabel implements Runnable {

    public static void main( String[] args ){
        SwingUtilities.invokeLater( new WrappedLabel() );
    }

    @Override
    public void run(){
        final JPanel panel = new JPanel( new BorderLayout() );

        String text = "Lorem <b>ipsum</b> dolor sit amet, consectetur adipiscing elit. "
                + "Aliquam non pellentesque enim. Donec nec nisl tortor."
                + " Curabitur rutrum molestie est eget varius. Nullam ut lacinia est."
                + " Phasellus hendrerit sollicitudin justo, vitae malesuada dolor vestibulum at."
                + " Integer pharetra purus sed ipsum pulvinar, et pretium odio volutpat. Donec vitae varius metus."
                + " Cras sagittis vulputate erat, at faucibus lectus faucibus id. Cras varius nunc eu felis tristique dapibus."
                + " Aenean enim eros, dapibus pellentesque nibh ut, efficitur malesuada sapien. Nullam imperdiet nunc velit,"
                + "sed laoreet massa mattis eget. Morbi id justo quis sapien aliquet bibendum sed at leo. In mi felis, consectetur"
                + " sed orci eget, tempus maximus turpis. Curabitur sed felis id nisl vehicula sollicitudin sed eget erat.Ut sagittis at nisi sed facilisis."
                + " Morbi vel felis ac diam molestie consequat. Sed nisl lectus, sollicitudin at neque in, "
                + "placerat aliquet nunc. Maecenas quis enim vitae nunc fermentum congue. Sed posuere quam a ultricies fringilla."
                + " Vivamus aliquam nunc lacus, vitae consectetur tortor consequat ut. Cras viverra mi sit amet magna auctor eleifend."
                + " Morbi in risus nisl. Praesent nunc dolor, lobortis nec ultricies aliquet, sollicitudin eu sapien. Fusce interdum ac leo non suscipit."
                + "Vivamus at viverra elit, ut vestibulum elit. Sed bibendum, lorem et ornare sagittis, erat nulla ultricies odio, quis iaculis lacus nisl "
                + "vel ligula. Sed iaculis elit eu felis consectetur dignissim. ";
        JLabel label = new JLabel("<html>" +text+ "</html>");
        panel.add( label, BorderLayout.CENTER );

        final JFrame frame = new JFrame();
        frame.add( new WrappingScrollPane( panel ) );
        frame.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
        frame.setSize( 256, 256 );
        frame.setVisible( true );
    }
}

class WrappingScrollPane extends JScrollPane implements ComponentListener {

    WrappingScrollPane( Container view ){
        super( view );
        this.viewport.addComponentListener( this );
    }

    @Override
    public void componentHidden( ComponentEvent ce ){
    }

    @Override
    public void componentMoved( ComponentEvent ce ){
    }

    /** calculating required height is a 3 step process
      * 1. sync width of client and viewport, set height of client to high value
      * 2. let LayoutManager calculate required minimum size
      * 3. set preferredSize and revalidate
     **/
    @Override
    public void componentResized( ComponentEvent ce ){
        final Container view = (Container) this.viewport.getView();
        final int width = this.viewport.getExtentSize().width;
        view.setPreferredSize( new Dimension( width, Integer.MAX_VALUE ) );
        final int height = view.getLayout().preferredLayoutSize( view ).height;
        view.setPreferredSize( new Dimension( width, height ) );
        view.revalidate();
    }

    @Override
    public void componentShown( ComponentEvent ce ){
    }
}

导入java.awt.BorderLayout；
导入java.awt.Container；
导入java.awt.Dimension；
导入java.awt.event.ComponentEvent；
导入java.awt.event.ComponentListener；
导入javax.swing.JFrame；
导入javax.swing.JLabel；
导入javax.swing.JPanel；
导入javax.swing.JScrollPane；
导入javax.swing.SwingUtilities；
公共类WrappedLabel实现Runnable{
公共静态void main（字符串[]args）{
invokeLater（新的WrappedLabel（））；
}
@凌驾
公开募捐{
最终JPanel面板=新JPanel（新的BorderLayout（））；
String text=“Lorem ipsum door sit amet，concertetur adipsicing elit。”
+“不可否认的侵权行为。”
+“金樱子是一种葡萄品种，它是一种新品种。”
+“朱斯托·亨德雷特·索利西图因·朱斯托的前庭生活”
+“整只掌跖和掌跖，并在掌跖和掌跖之前，为您提供最新的生命。”
+“秃鹫之箭，在秃鹫之箭上。秃鹫之箭，在秃鹫之箭上。秃鹫之箭。”
+“爱是一种本能，爱是一种本能，爱是一种本能，爱是一种智慧，爱是一种本能。”
+“我是拉奥里特·马萨·马蒂斯·埃吉特。我是莫比·伊德·奎斯·萨皮安·阿利奎特·比本杜姆，在利奥。在米菲利斯，康塞特图”
+“这是一只虎鲸，它是一只大黄羊。它是一只库拉比猫，它是一只小马，在它的设施上生长。”
+“Morbi vel felis ac diam Molectie consequat.Sed nisl lectus，sollicitudin于年在内克”
+“placerat aliquet nunc.Maecenas quis enim vitae nunc congue.Sed posuere quam a ultricies frongilla。”
+“我是一个伟大的拍卖人，我是一个伟大的拍卖人。”
+“莫里斯·尼塞尔的摩比，多洛的祈祷者，其他人的祈祷者，欧盟智者的祈祷者，非宗教信仰者的祈祷者。”
+“viverra elit，ut前庭elit.Sed bibendum，lorem et Orna sagittis，erat nulla ultricies odio，quis iaculis lacus nisl”
+“法利古拉。艾库利斯精英猫科动物荣誉称号。”；
JLabel标签=新的JLabel（“+text+”）；
panel.add（标签、BorderLayout.CENTER）；
最终JFrame=新JFrame（）；
框架。添加（新包装窗格玻璃（面板））；
frame.setDefaultCloseOperation（JFrame.DISPOSE\u ON\u CLOSE）；
帧设置大小（256，256）；
frame.setVisible（true）；
}
}
类WrappingScrollPane扩展JScrollPane实现ComponentListener{
包装卷窗格（容器视图）{
超级（视图）；
this.viewport.addComponentListener（this）；
}
@凌驾
公共无效组件隐藏（组件事件ce）{
}
@凌驾
公共无效组件已移动（组件事件ce）{
}
/**计算所需高度需要三个步骤
*1.同步客户端和视口的宽度，将客户端的高度设置为高值
*2.让LayoutManager计算所需的最小尺寸
*3.设置首选大小和重新验证日期
**/
@凌驾
public void componentResistized（ComponentEvent ce）{
最终容器视图=（容器）this.viewport.getView（）；
final int width=this.viewport.getExtentSize（）.width；
view.setPreferredSize（新维度（宽度，Integer.MAX_值））；
final int height=view.getLayout（）.preferredLayoutSize（视图）.height；
view.setPreferredSize（新尺寸（宽度、高度））；
view.revalidate（）；
}
@凌驾
显示的公共无效组件（组件事件ce）{
}
}
您需要做的是在添加到滚动窗格的组件上实现可滚动的
界面

然后，可以强制该组件适应视口的宽度

最简单的方法是使用，它实现了
可滚动
界面的方法，并允许您自定义行为


String wrap = "<html>";
label.setText(wrap + label.getText());

JScrollPane sp = new JScrollPane(label);
add(sp, BorderLayout.CENTER);

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;

public class WrappedLabel implements Runnable {

    public static void main( String[] args ){
        SwingUtilities.invokeLater( new WrappedLabel() );
    }

    @Override
    public void run(){
        final JPanel panel = new JPanel( new BorderLayout() );

        String text = "Lorem <b>ipsum</b> dolor sit amet, consectetur adipiscing elit. "
                + "Aliquam non pellentesque enim. Donec nec nisl tortor."
                + " Curabitur rutrum molestie est eget varius. Nullam ut lacinia est."
                + " Phasellus hendrerit sollicitudin justo, vitae malesuada dolor vestibulum at."
                + " Integer pharetra purus sed ipsum pulvinar, et pretium odio volutpat. Donec vitae varius metus."
                + " Cras sagittis vulputate erat, at faucibus lectus faucibus id. Cras varius nunc eu felis tristique dapibus."
                + " Aenean enim eros, dapibus pellentesque nibh ut, efficitur malesuada sapien. Nullam imperdiet nunc velit,"
                + "sed laoreet massa mattis eget. Morbi id justo quis sapien aliquet bibendum sed at leo. In mi felis, consectetur"
                + " sed orci eget, tempus maximus turpis. Curabitur sed felis id nisl vehicula sollicitudin sed eget erat.Ut sagittis at nisi sed facilisis."
                + " Morbi vel felis ac diam molestie consequat. Sed nisl lectus, sollicitudin at neque in, "
                + "placerat aliquet nunc. Maecenas quis enim vitae nunc fermentum congue. Sed posuere quam a ultricies fringilla."
                + " Vivamus aliquam nunc lacus, vitae consectetur tortor consequat ut. Cras viverra mi sit amet magna auctor eleifend."
                + " Morbi in risus nisl. Praesent nunc dolor, lobortis nec ultricies aliquet, sollicitudin eu sapien. Fusce interdum ac leo non suscipit."
                + "Vivamus at viverra elit, ut vestibulum elit. Sed bibendum, lorem et ornare sagittis, erat nulla ultricies odio, quis iaculis lacus nisl "
                + "vel ligula. Sed iaculis elit eu felis consectetur dignissim. ";
        JLabel label = new JLabel("<html>" +text+ "</html>");
        panel.add( label, BorderLayout.CENTER );

        final JFrame frame = new JFrame();
        frame.add( new WrappingScrollPane( panel ) );
        frame.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
        frame.setSize( 256, 256 );
        frame.setVisible( true );
    }
}

class WrappingScrollPane extends JScrollPane implements ComponentListener {

    WrappingScrollPane( Container view ){
        super( view );
        this.viewport.addComponentListener( this );
    }

    @Override
    public void componentHidden( ComponentEvent ce ){
    }

    @Override
    public void componentMoved( ComponentEvent ce ){
    }

    /** calculating required height is a 3 step process
      * 1. sync width of client and viewport, set height of client to high value
      * 2. let LayoutManager calculate required minimum size
      * 3. set preferredSize and revalidate
     **/
    @Override
    public void componentResized( ComponentEvent ce ){
        final Container view = (Container) this.viewport.getView();
        final int width = this.viewport.getExtentSize().width;
        view.setPreferredSize( new Dimension( width, Integer.MAX_VALUE ) );
        final int height = view.getLayout().preferredLayoutSize( view ).height;
        view.setPreferredSize( new Dimension( width, height ) );
        view.revalidate();
    }

    @Override
    public void componentShown( ComponentEvent ce ){
    }
}

import java.awt.*;
import javax.swing.*;


public class WrapTest extends JFrame {

    public WrapTest() {
        super("test");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setLayout(new BorderLayout());

        JLabel label = new JLabel("<html>Lorem <b>ipsum</b> dolor sit amet, consectetur adipiscing elit. "
                + "Aliquam non pellentesque enim. Donec nec nisl tortor."
                + " Curabitur rutrum molestie est eget varius. Nullam ut lacinia est."
                + " Phasellus hendrerit sollicitudin justo, vitae malesuada dolor vestibulum at."
                + " Integer pharetra purus sed ipsum pulvinar, et pretium odio volutpat. Donec vitae varius metus."
                + " Cras sagittis vulputate erat, at faucibus lectus faucibus id. Cras varius nunc eu felis tristique dapibus."
                + " Aenean enim eros, dapibus pellentesque nibh ut, efficitur malesuada sapien. Nullam imperdiet nunc velit,"
                + "sed laoreet massa mattis eget. Morbi id justo quis sapien aliquet bibendum sed at leo. In mi felis, consectetur"
                + " sed orci eget, tempus maximus turpis. Curabitur sed felis id nisl vehicula sollicitudin sed eget erat.Ut sagittis at nisi sed facilisis."
                + " Morbi vel felis ac diam molestie consequat. Sed nisl lectus, sollicitudin at neque in, "
                + "placerat aliquet nunc. Maecenas quis enim vitae nunc fermentum congue. Sed posuere quam a ultricies fringilla."
                + " Vivamus aliquam nunc lacus, vitae consectetur tortor consequat ut. Cras viverra mi sit amet magna auctor eleifend."
                + " Morbi in risus nisl. Praesent nunc dolor, lobortis nec ultricies aliquet, sollicitudin eu sapien. Fusce interdum ac leo non suscipit."
                + "Vivamus at viverra elit, ut vestibulum elit. Sed bibendum, lorem et ornare sagittis, erat nulla ultricies odio, quis iaculis lacus nisl "
                + "vel ligula. Sed iaculis elit eu felis consectetur dignissim. ");


        ScrollablePanel panel = new ScrollablePanel( new BorderLayout() );
        panel.setScrollableWidth( ScrollablePanel.ScrollableSizeHint.FIT );
        panel.add( label );

        JScrollPane sp = new JScrollPane(panel);
        add(sp, BorderLayout.CENTER);

        setLocationByPlatform(true);
        setSize(500, 200);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            new WrapTest().setVisible(true);
        });
    }
}