java 调用shell命令

错误的方法：

//CPUID
private static final String cpuid="dmidecode -t processor | grep 'ID' | head -1";

Process p = Runtime.getRuntime().exec(puid);

原因：不会被再次解析，管道符失效

 

正确的办法：

linux下：

String[] command = { "/bin/sh", "-c", (puid };

Process ps = Runtime.getRuntime().exec(command );

windows下：

String[] command = { "cmd", "/c", (puid };

Process ps = Runtime.getRuntime().exec(command );



//提取jar中webapp、jetty文件夹
if(OSinfo.isWindows()){
Runtime.getRuntime().exec(new String[]{"cmd","/c","IF NOT EXIST jetty/ jar xf *.jar jetty/"});
}
else if(OSinfo.isLinux()){
   Runtime.getRuntime().exec(new String[]{"/bin/sh","-c","if [ ! -d \"jetty/\" ]; then\n  jar xf *.jar jetty/ \nfi"});
}

Thread.sleep(500);

cfg = new XmlConfiguration(new FileInputStream("./jetty/jetty.xml"));
cfg.configure(server);

//set default descriptor

WebAppContext context = (WebAppContext) server.getHandler().getServer().getHandlers()[0];
String descriptor = Thread.currentThread().getClass().getResource("/jetty/web.xml").toString();
context.setDescriptor(descriptor);