web项目启动前Listener，把sigar加入java.library.path

InitLibraryPath.java

1.在web.xml中添加监听
	<listener>
		<listener-class>com......listener.InitLibraryPath</listener-class>
	</listener>
  
2.读取src/main/resources/sigar目录下的所有内容
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import com.google.common.io.Resources;

public class InitLibraryPath implements ServletContextListener {

	@Override
	public void contextDestroyed(ServletContextEvent arg0) {
	}

	@Override
	public void contextInitialized(ServletContextEvent arg0) {
		try {
			String file = Resources.getResource("sigar").getFile();
			String path = System.getProperty("java.library.path");
			if (isOSWin()) {
				path += ";" + file;
			} else {
				path += ":" + file;
			}
			System.setProperty("java.library.path", path);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static boolean isOSWin() {// OS 版本判断
		String OS = System.getProperty("os.name").toLowerCase();
		if (OS.indexOf("win") >= 0) {
			return true;
		} else
			return false;
	}

}