The dependencies of some of the beans in the application context form a cycle循环依赖解决方案

1.问题描述

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-05-07 09:59:53.905 ERROR 18672 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

The dependencies of some of the beans in the application context form a cycle:

   oaSoContractHeadServiceImpl (field private bjja.hzero.customs.app.service.impl.StockComponentHeadServiceImpl bjja.hzero.customs.app.service.impl.OaSoContractHeadServiceImpl.stockComponentHeadService)
      ↓
   stockComponentHeadServiceImpl defined in URL [jar:file:/data/src/hzero-customs/target/hzero-customs.jar!/BOOT-INF/classes!/bjja/hzero/customs/app/service/impl/StockComponentHeadServiceImpl.class]
┌─────┐
|  packPlanCompLineRepositoryImpl defined in URL [jar:file:/data/src/hzero-customs/target/hzero-customs.jar!/BOOT-INF/classes!/bjja/hzero/customs/infra/repository/impl/PackPlanCompLineRepositoryImpl.class]
↑     ↓
|  packPlanLineServiceImpl defined in URL [jar:file:/data/src/hzero-customs/target/hzero-customs.jar!/BOOT-INF/classes!/bjja/hzero/customs/domain/service/impl/PackPlanLineServiceImpl.class]
└─────┘

2.解决方案

@Autowire配合@Lazy懒加载使用

方法一：

@Lazy
@Autowired
private PackPlanLineService packPlanLineService;

方法二（针对构造注入）：

private final PackPlanSrodLineMapper packPlanSrodLineMapper;
    private final PackPlanLineService packPlanLineService;
    private final CommonService commonService;

    @Autowired
    public PackPlanSrodLineRepositoryImpl(PackPlanSrodLineMapper packPlanSrodLineMapper,
                                          @Lazy
                                          PackPlanLineService packPlanLineService,
                                          CommonService commonService) {
        this.packPlanSrodLineMapper = packPlanSrodLineMapper;
        this.packPlanLineService = packPlanLineService;
        this.commonService = commonService;
    }