Springboot中如果希望在Utils工具类中,使用到我们已经定义过的Dao层或者Service层Bean,可以如下编写Utils类:
1. 使用@Component注解标记工具类StatisticsUtils:
2. 使用@Autowired(@Autowired和@Resource的区别不再介绍)注入我们需要的bean:
3. 在工具类中编写init()函数,并使用@PostConstruct注解标记工具类,初始化Bean:
public class StatisticsUtils { @Autowired private IdeaMemberDao ideaMemberDao; @Autowired private ProjectMemberDao projectMemberDao; @Autowired private IdeaMgrDao ideaMgrDao; @Autowired private ProjectMgrDao projectMgrDao; public static StatisticsUtils statisticsUtils; @PostConstruct public void init() { statisticsUtils = this; statisticsUtils.ideaMemberDao = this.ideaMemberDao; statisticsUtils.projectMemberDao = this.projectMemberDao; statisticsUtils.ideaMgrDao = this.ideaMgrDao; statisticsUtils.projectMgrDao = this.projectMgrDao; }