Java 拆分样式文档

我目前正在编写一个程序，该程序在JTextPane中接受样式化文本，并在不可编辑的JTextPane中显示相同的样式化文本。问题是我实际上想要在输入和显示之间解析文档。基本上，我希望能够在保持格式的同时将DefaultStyledDocument拆分为两个文档。我该怎么做

SSCE说明点：

import java.awt.Color;
import javax.swing.text.DefaultStyledDocument;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;


public class SSCCE extends javax.swing.JFrame {


    public SSCCE() {
        initComponents();
        try {
        DefaultStyledDocument doc = new DefaultStyledDocument();
        SimpleAttributeSet attr = new SimpleAttributeSet();
        StyleConstants.setBold(attr, true);
        doc.insertString(0, "This is bold.\n\n", attr);
        StyleConstants.setItalic(attr, true);
        doc.insertString(doc.getLength() - 1, "This is bold and italicized.\n", attr);
        doc.insertString(doc.getLength() - 1, "--\n", null); //This is a delimeter, for splitting the doucment
        StyleConstants.setBold(attr, false);
        StyleConstants.setForeground(attr, Color.red);
        doc.insertString(doc.getLength() - 1, "This is italicized and red.\n", attr);
        StyleConstants.setBold(attr, true);
        StyleConstants.setItalic(attr, false);
        doc.insertString(doc.getLength() -1 , "This is bold and red.\n", attr);
        txpInput.setDocument(doc); //txpInput is a JTextPane
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    @SuppressWarnings("unchecked")                      
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        jPanel1 = new javax.swing.JPanel();
        jScrollPane2 = new javax.swing.JScrollPane();
        txpInput = new javax.swing.JTextPane();
        jScrollPane3 = new javax.swing.JScrollPane();
        txpOutput1 = new javax.swing.JTextPane();
        jLabel1 = new javax.swing.JLabel();
        btnOutput = new javax.swing.JButton();
        jScrollPane4 = new javax.swing.JScrollPane();
        txpOutput2 = new javax.swing.JTextPane();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jScrollPane2.setViewportView(txpInput);

        txpOutput1.setEditable(false);
        jScrollPane3.setViewportView(txpOutput1);

        jLabel1.setText("Output:");

        btnOutput.setText("Output");
        btnOutput.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                btnOutputActionPerformed(evt);
            }
        });

        txpOutput2.setEditable(false);
        jScrollPane4.setViewportView(txpOutput2);

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jScrollPane3, javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(jLabel1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jScrollPane2)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addComponent(btnOutput, javax.swing.GroupLayout.PREFERRED_SIZE, 174, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(0, 462, Short.MAX_VALUE))
                    .addComponent(jScrollPane4))
                .addContainerGap())
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 105, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jLabel1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(btnOutput)
                .addGap(9, 9, 9)
                .addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, 135, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane4, javax.swing.GroupLayout.PREFERRED_SIZE, 135, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(79, Short.MAX_VALUE))
        );

        jScrollPane1.setViewportView(jPanel1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1)
        );

        pack();
    }                        

    private void btnOutputActionPerformed(java.awt.event.ActionEvent evt) {                                          
        //Comment out the body of this method to get code to run
        //This needs to parse the text and output it to the two output JTextPanes
        DefaultStyledDocument inputDoc = (DefaultStyledDocument) txpInput.getDocument();
        DefaultStyledDocument[] output = inputDoc.split("--"); //Invalid, is there an equivalent
        txpOutput1.setDocument(ouput[0]);
        txpOutput2.setDocument(ouput[1]);
        this.validate();
        this.repaint();
    }                                         

    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(SSCCE.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(SSCCE.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(SSCCE.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(SSCCE.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }    
        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new SSCCE().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton btnOutput;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JScrollPane jScrollPane3;
    private javax.swing.JScrollPane jScrollPane4;
    private javax.swing.JTextPane txpInput;
    private javax.swing.JTextPane txpOutput1;
    private javax.swing.JTextPane txpOutput2;
    // End of variables declaration                   
}

注意：我使用Netbeans GUI生成器，因此生成的代码较长

基本上，在这个示例中，我向input JTextPane输入了一些格式化文本。然后，我希望能够将格式化文本拆分为两个输出窗格，而不会丢失格式。在SCCE中，当用户按下“输出”按钮时，数据应被复制，并被-行分割。在这个例子中，我使用了一个不存在的split方法，但我认为它可以理解这一点

这是此特定示例的预期输入：

这是预期的产出：

---

我原本以为这个问题有可能的答案。但是我试过了，发现它不起作用。最后，如何在保持样式的同时拆分样式化文档。

从同一内容源创建样式化文档的两个副本

找到文档分隔符

在第一个文档中，删除分隔符之前的所有内容

在第二个文档中，删除分隔符后的所有内容

---

更新：您可以使用合并文档，但有两个目标文档，并根据筛选规则将源文档的插入重定向到所需实例。

如何获取两个文档？我正在从JTextPane获取文档。它只会向我传递对一个文档的引用。您只需创建它-new EditorItDependentDocument或textPane.GetEditorIt.createDefaultDocument