Java中如何让web服务器启动的时候自动运行web程序中某个类的某个

public void init（）{
            System.out.println("这样在web容器启动的时候，就会执行这句话了！");
}

  
   GenerateData
   com.yq.javaSCADA.business.impl.GenerateData
   1
  

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