@PostConstruct注解----解决非service层注入service的空指针问题
Java中该注解的说明:@PostConstruct该注解被用来修饰一个非静态的void()方法。被@PostConstruct修饰的方法会在服务器加载Servlet的时候运行,并且只会被服务器执行一次。PostConstruct在构造函数之后执行,init()方法之前执行。
@PostConstruct注解 该注解的方法在整个Bean初始化中的执行顺序:
Constructor(构造方法) -> @Autowired(依赖注入) -> @PostConstruct(注释的方法)
@Component
public class NumberGenarator{
@Autowired
private ErpcodeTotalityService erpcodeTotalityService;
public static NumberGenarator numberGenarator;
@PostConstruct
public void init(){
numberGenarator = this;
numberGenarator.erpcodeTotalityService = this.erpcodeTotalityService;
}
private static String creat(){
CodeTotality result = numberGenarator.erpcodeTotalityService.getCodeTotality(codeTotality);
}
}
|