Java在Windows CMD中打印ANSI彩色文本：兼容性挑战与解决方案

import java.io.*;

public class GFG {
    public static final String ANSI_RESET = "\u001B[0m";
    public static final String ANSI_YELLOW = "\u001B[33m";

    public static void main(String[] args) {
        System.out.println(ANSI_YELLOW + "This text is yellow" + ANSI_RESET);
    }
}

import java.io.IOException;

public class ConsoleOutput {
    public static final String ANSI_RESET_ALL = "\33[0m";
    public static final String ANSI_YELLOW_FG = "\33[33m";
    public static final String ANSI_RESET_FG = "\33[39m";

    public static void main(String[] args) {
        println(ANSI_YELLOW_FG + "This text is yellow" + ANSI_RESET_FG);
        println("This is normal color");
    }

    /**
     * 使用 cmd /c echo 命令在Windows CMD中打印彩色文本。
     * @param s 要打印的字符串，可包含ANSI转义序列。
     */
    static void println(String s) {
        try {
            // 构建并启动一个新进程，执行 cmd /c echo 命令
            // inheritIO() 使得子进程的输入输出流与当前Java进程共享
            new ProcessBuilder("cmd", "/c", "echo " + s)
                .inheritIO()
                .start()
                .waitFor(); // 等待子进程完成
        } catch (InterruptedException | IOException e) {
            throw new RuntimeException("Error printing with cmd /c echo", e);
        }
    }
}

import java.lang.foreign.*;
import java.lang.invoke.MethodHandle;

public class ConsoleOutput {
    public static final String ANSI_RESET_ALL = "\33[0m";
    public static final String ANSI_YELLOW_FG = "\33[33m";
    public static final String ANSI_RESET_FG = "\33[39m";

    // Windows API 常量
    static final int STD_OUTPUT_HANDLE = -11;
    static final int ENABLE_PROCESSED_OUTPUT = 0x0001;
    static final int ENABLE_VIRTUAL_TERMINAL_PROCESSING = 0x0004;

    public static void main(String[] args) {
        // 尝试启用ANSI支持
        if (initANSI()) {
            System.out.println("ANSI support enabled successfully (Java 22+).");
        } else {
            System.out.println("Failed to enable ANSI support or not on Windows.");
        }
        System.out.println(ANSI_YELLOW_FG + "This text is yellow" + ANSI_RESET_FG);
        System.out.println("This is normal color");
    }

    /**
     * 使用Java 22+ FFM API启用Windows控制台的ANSI虚拟终端处理模式。
     * @return 如果成功启用ANSI支持则返回true，否则返回false。
     */
    static boolean initANSI() {
        try (Arena arena = Arena.ofConfined()) {
            // 查找 kernel32.dll 库
            SymbolLookup sl = SymbolLookup.libraryLookup("kernel32.dll", arena);
            Linker linker = Linker.nativeLinker();

            // 获取 GetStdHandle 函数句柄
            MethodHandle GetStdHandle = linker.downcallHandle(
                sl.find("GetStdHandle").orElseThrow(),
                FunctionDescriptor.of(ValueLayout.ADDRESS, ValueLayout.JAVA_INT)
            );

            // 获取 SetConsoleMode 函数句柄
            MethodHandle SetConsoleMode = linker.downcallHandle(
                sl.find("SetConsoleMode").orElseThrow(),
                FunctionDescriptor.of(ValueLayout.JAVA_BOOLEAN, ValueLayout.ADDRESS, ValueLayout.JAVA_INT)
            );

            // 调用 GetStdHandle 获取标准输出句柄
            MemorySegment consoleHandle = (MemorySegment) GetStdHandle.invokeExact(STD_OUTPUT_HANDLE);

            // 调用 SetConsoleMode 启用虚拟终端处理模式
            return (boolean) SetConsoleMode.invokeExact(
                consoleHandle,
                ENABLE_PROCESSED_OUTPUT | ENABLE_VIRTUAL_TERMINAL_PROCESSING
            );
        } catch (RuntimeException | Error unchecked) {
            // 捕获运行时异常或错误
            throw unchecked;
        } catch (Throwable e) {
            // 捕获其他可能的异常，例如 NoSuchMethodException 如果函数未找到
            throw new AssertionError("Error initializing ANSI with FFM API: " + e.getMessage(), e);
        }
    }
}