java 实现控制windows系统音量

所需windows的控件

链接：https://pan.baidu.com/s/1oXMBlTisy-1wcr5tY4WNhQ
提取码：09it

将音量控件放到所需控制的windows操作系统，c:\Windows\System32目录下

::将音量控件放到相应目录下
xcopy %cd%\msvcr120d.dll c:\Windows\System32\ /y /r /e

调用代码如下

try {
    //单例模式
    VolumeControl vc = VolumeControl.getInstance();
    //设置音量值
    vc.setMasterVolume(Integer.parseInt(volume));
    log.warn("设置终端音量值为：" + volume+"成功！");
} catch (OperationFailedException e) {
    log.warn("设置终端音量值为：" + volume+"失败！error:"+e);
    throw e;
}

VolumeControl工具类代码如下

package com.xianquan.common.volume;

/**
 * 该类设计为单例模式 提供控制win7系统音量的方法
 * 
 * @author lcoil
 * 
 */
public class VolumeControl {

    static {
        try{
            // add hook for release JNI resource on JVM shutdown 
            Runtime.getRuntime().addShutdownHook(new Thread (){
                @Override
                public void run() {        
                    try {
                        finalize();
                    } catch (Throwable e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    release();                  
                }});

            System.loadLibrary("VolumeControlDLL");
        } catch(Exception e){
            System.out.println("=-=-=-=-=-="+e.getLocalizedMessage()+"!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        }
    }

    private static VolumeControl uniqueInstance = null;

    private VolumeControl() throws OperationFailedException {
        init();
    }

    /**
     * 单例模式
     * 
     * @return 唯一的VolumeControl 有可能为null
     */
    public static VolumeControl getInstance() {
        if (uniqueInstance == null) {
            try {
                uniqueInstance = new VolumeControl();
            } catch (OperationFailedException e) {
                e.printStackTrace();
                return null;
            }
        }
        return uniqueInstance;
    }

    /**
     * cpp本地一些初始化
     * 
     * @return
     */
    private native void init() throws OperationFailedException;

    /**
     * 设置音量大小0~100
     * 
     * @param num
     * @return 操作是否成功
     */
    public native void setMasterVolume(int num) throws OperationFailedException;

    /**
     * 
     * @return 当前音量大小1-100
     */
    public native int getMasterVolume() throws OperationFailedException;

    /**
     * 设置是否静音 true-是 false-否
     * 
     * @param bMute
     * @return
     */
    public native void setMute(boolean bMute) throws OperationFailedException;

    /**
     * 得到当前静音状态 true-是 false-否
     * 
     * @return
     */
    public native boolean getMute() throws OperationFailedException;

    /**
     * cpp本地释放指针等操作
     * 
     * @return
     */
    private native void finished();
    public native static  void release();

    @Override
    public void finalize()  {
        finished();
        try {
            super.finalize();
        } catch (Throwable e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }  
    }

}