@Component
public class WeiXinStatic {
    @Autowired
    private  CustomerMapper customerMapper;

    private final static Logger log = LoggerFactory.getLogger(WeiXinStatic.class);
    public final static Map<String, Customer> customer = new HashMap<>();


 

    // 在构造方法执行后执行
    @PostConstruct
    public void init() {
        initMap();
    }

    public void initMap() {
        List<Customer>  customerList= customerMapper.selectCustomer();

        for (Customer customer1 :customerList) {
            customer.put(customer1.getCsId()+"",customer1);
        }
    }


}

  /* //注解是操作的关键
    @PostConstruct
    public void init(){
        System.out.println("系统运行开始");
        //放数据到静态的list中就是放到内存中,全局通用
    }

    @PreDestroy
    public void destroy(){
        System.out.println("系统运行结束");
    }*/