Hi,all now ,an old problem I really cann't resolved ,in my window7(64bit) use libvirt-0.4.7.jar to conn server System.setProperty("jna.library.path", "D:/Program Files/Libvirt/bin"); conn = new Connect("qemu+tcp://192.168.1.106/system",true); the exception is Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'virt': ÕҲ»µ½ָ¶¨ PS:in cmd line i want to connect sever is no problem ,like this: virsh -c qemu+tcp://192.168.1.106/system, it's ok thanks in advance!!!