JUnique库用来防止同时多次执行同一个应用程序
示例代码如下：
publicstaticvoidmain(String[]args){StringappId="myapplicationid";booleanalreadyRunning;try{JUnique.acquireLock(appId);alreadyRunning=false;}catch(AlreadyLockedExceptione){alreadyRunning=true;}if(!alreadyRunning){//Startsequencehere}}
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