java实现屏幕亮度调节

第一步：添加以下工具类。

package home.equipmentControl.brightnessAdjust;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class BrightnessManager {
    public static void setBrightness(int brightness)
            throws IOException {
        //Creates a powerShell command that will set the brightness to the requested value (0-100),after the requested delay (in milliseconds) has passed.
        String s = String.format("$brightness = %d;",brightness)
                + "$delay = 0;"
                + "$myMonitor = Get-WmiObject -Namespace root\\wmi -Class WmiMonitorBrightnessMethods;"
                + "$myMonitor.wmisetbrightness($delay,$brightness)";
        String command = "powershell.exe  " + s;
        // Executing the command
        Process powerShellProcess = Runtime.getRuntime().exec(command);
        powerShellProcess.getOutputStream().close();
        //Report any error messages
        String line;
        BufferedReader stderr = new BufferedReader(new InputStreamReader(
                powerShellProcess.getErrorStream()));
        line = stderr.readLine();
        if (line != null)
        {
            System.err.println("Standard Error:");
            do
            {
                System.err.println(line);
            } while ((line = stderr.readLine()) != null);
        }
        stderr.close();
    }
}

第二部：在需要调节亮度的地方调用setBrightness(int brightness)方法，参数值为亮度值，参数为0-100。

比如设置亮度为80：

BrightnessManager.setBrightness(80);