将 bean 注入枚举 [英] Inject bean into enum

问题描述

我有为报告准备数据的 DataPrepareService，我有一个带有报告类型的 Enum，我需要将 ReportService 注入 Enum 或从 enum 访问 ReportService.

I have the DataPrepareService that prepare data for reports and I have an Enum with report types, and I need to inject ReportService into Enum or have access to ReportService from enum.

我的服务:

@Service
public class DataPrepareService {
    // my service
}

我的枚举:

public enum ReportType {

    REPORT_1("name", "filename"),
    REPORT_2("name", "filename"),
    REPORT_3("name", "filename")

    public abstract Map<String, Object> getSpecificParams();

    public Map<String, Object> getCommonParams(){
        // some code that requires service
    }
}

我尝试使用

@Autowired
DataPrepareService dataPrepareService;

，但是没有用

如何将我的服务注入枚举?

How can I inject my service into enum?

推荐答案

public enum ReportType {

    REPORT_1("name", "filename"),
    REPORT_2("name", "filename");

    @Component
    public static class ReportTypeServiceInjector {
        @Autowired
        private DataPrepareService dataPrepareService;

        @PostConstruct
        public void postConstruct() {
            for (ReportType rt : EnumSet.allOf(ReportType.class))
               rt.setDataPrepareService(dataPrepareService);
        }
    }

[...]

}

weekens 的答案 如果您将内部类更改为静态以便 spring 可以看到它

weekens' answer works if you change inner class to static so spring can see it

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