详解Java设计模式之单例模式

package lims.designpatterndemo.singletondemo;

public class LimsService {
  private static String url;
  private static String username;
  private static String password;
  //
  private static LimsService service = null;
  //私有构造函数
  private LimsService(){
    url = "http://serviceurl";
    username = "admin";
    password = "pswd";
  }
  public static LimsService getService(){
    if(service==null){
      service = new LimsService();
    }
    return service;
  }
  //
  public boolean uploadEquipmentData(String equipmentData){
    return true;
  }
}

package lims.designpatterndemo.singletondemo;

public class SingletonDemo {

  public static void main(String[] args) {
    boolean rst = LimsService.getService().uploadEquipmentData("");
    System.out.println(rst);
  }
}