log4j使用富文本JTextPane分不同颜色显示到界面

package util;

import org.apache.log4j.*;
import org.apache.log4j.spi.LoggingEvent;

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

public class Log4j {

    public static final Logger LOGGER = Logger.getLogger(Log4j.class);
    //配置为 界面输出 和 文件输出
    public static void configureLogger(JTextPane textPane) {
        // 创建UI界面输出的Appender
        JTextPaneAppender uiAppender = new JTextPaneAppender(textPane);
        //uiAppender.setLayout(new PatternLayout("%d{yyyy-MM-dd HH:mm:ss} %c [%p] - %m%n"));
        uiAppender.setLayout(new PatternLayout("%d{yyyy-MM-dd HH:mm:ss} [%p] - %m%n"));
        uiAppender.activateOptions();
        Logger.getRootLogger().addAppender(uiAppender);

        // 创建文件输出的Appender
        try {
            FileAppender fileAppender = new FileAppender(new PatternLayout("%d{yyyy-MM-dd HH:mm:ss} [%p] - %m%n"), "../logfile.log");
            fileAppender.setAppend(true); // 如果true，则追加到现有的日志文件末尾；如果false，则覆盖文件中的现有内容
            fileAppender.activateOptions();
            // 将Appender添加到日志记录器
            Logger.getRootLogger().addAppender(fileAppender);
        } catch (IOException e) {
            e.printStackTrace();
            return;
        }

        LOGGER.setLevel(Level.DEBUG);
    }
    //配置为 控制台输出 和 文件输出
    public static void configureLogger() {
        // 创建控制台输出的Appender
        ConsoleAppender consoleAppender = new ConsoleAppender();
        consoleAppender.setLayout(new PatternLayout("%d{yyyy-MM-dd HH:mm:ss} %c [%p] - %m%n"));
        consoleAppender.setTarget(ConsoleAppender.SYSTEM_OUT);
        consoleAppender.activateOptions();

        // 创建文件输出的Appender
        try {
            FileAppender fileAppender = new FileAppender(new PatternLayout("%d{yyyy-MM-dd HH:mm:ss} %c [%p] - %m%n"), "logs/logfile.log");
            fileAppender.setAppend(true); // 如果true，则追加到现有的日志文件末尾；如果false，则覆盖文件中的现有内容
            fileAppender.activateOptions();
            // 将Appender添加到日志记录器
            Logger.getRootLogger().addAppender(fileAppender);
        } catch (IOException e) {
            e.printStackTrace();
            return;
        }

        LOGGER.setLevel(Level.DEBUG);
    }
    public static void AppendText(JTextPane textPane,String text/*文本内容*/,Color textColor/*文本颜色*/) throws BadLocationException {
        SimpleAttributeSet set = new SimpleAttributeSet();
        StyleConstants.setForeground(set, textColor);//设置文本颜色
        StyledDocument doc = textPane.getStyledDocument();
        doc.setParagraphAttributes(textPane.getText().length(), doc.getLength() - textPane.getText().length(), set, false);
        doc.insertString(doc.getLength(),text,set);
        textPane.setCaretPosition(doc.getLength());
    }
    private static class JTextPaneAppender extends AppenderSkeleton {
        private JTextPane textPane;

        public JTextPaneAppender(JTextPane textPane) {
            this.textPane = textPane;
        }

        @Override
        protected void append(LoggingEvent event) {
            Color textColor ;
            if (event.getLevel().equals(Level.DEBUG)) {
                textColor = Color.GRAY;
            } else if (event.getLevel().equals(Level.INFO)) {
                textColor = Color.BLACK;
            } else if (event.getLevel().equals(Level.WARN)) {
                textColor = Color.ORANGE;
            } else if (event.getLevel().equals(Level.ERROR)) {
                textColor = Color.RED;
            } else if (event.getLevel().equals(Level.FATAL)) {
                textColor = Color.MAGENTA;
            } else {
                textColor = Color.BLACK;
            }

            String logMessage = layout.format(event);
            SwingUtilities.invokeLater(() -> {
                try {
                    AppendText(textPane,logMessage, textColor);
                } catch (BadLocationException e) {
                    e.printStackTrace();
                }
            });
        }

        @Override
        public void close() {
            // Nothing to do here
        }

        @Override
        public boolean requiresLayout() {
            return true;
        }
    }








    private static JTextPane textPane;
    public static void main(String[] args) {
        // 创建并显示UI界面
        createUI();

        // 配置log4j日志记录器
        configureLogger(textPane);

        // 示例日志输出
        LOGGER.debug("Debug log message");
        LOGGER.info("Info log message");
        LOGGER.warn("Warn log message");
        LOGGER.error("Error log message chenhao");
        LOGGER.fatal("Fatal log message chenhao");
        // 关闭log4j日志记录器
        LogManager.shutdown();
    }
    private static void createUI() {
        JFrame frame = new JFrame("Log Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 300);

        textPane = new JTextPane();
        textPane.setEditable(false);

        JScrollPane scrollPane = new JScrollPane(textPane);
        frame.getContentPane().add(scrollPane, BorderLayout.CENTER);

        frame.setVisible(true);
    }
}