春季转换器重用

我想使用Spring自定义转换器从我的持久对象转换为Json对象（用于UI层）。春季转换器重用

DBO的

class Adbo{ 
    Bdbo b = new Bdbo(); 
} 
class Bdbo{}

UI POJO。

class APoj{ 
    BPoj b = new Poj(); 
} 
class BPoj{}

这是我的转换器

class APojToADbo implements Converter<ADbo, APoj>{ 
    @Override 
    public APoj convert(ADbo source) { 
     //..code to convert 
     //..also includes conversion from BDbo to BPoj 
    } 
} 
class ADboToAPoj implements Converter<APoj, ADbo>{ 
    @Override 
    public ADbo convert(APoj source) { 
     //..code to convert 
     //..also includes conversion from BPoj to BDbo 
    } 
} 
class BPojToBDbo implements Converter<BDbo, BPoj>{ 
    @Override 
    public BPoj convert(BDbo source) { 
     //..code to convert 
    } 
} 
class BDboToBPoj implements Converter<BPoj, BDbo>{ 
    @Override 
    public BDbo convert(BPoj source) { 
     //..code to convert 
    } 
}

注册我转换到ConversionService这个

@Bean 
public ConversionServiceFactoryBean getConversionService(){ 
    ConversionServiceFactoryBean c = new ConversionServiceFactoryBean(); 
    Set<Converter> converters = new HashSet<>(); 
    converters.add(aPojToADbo); 
    converters.add(aDboToAPoj); 
    converters.add(bPojToBDbo); 
    converters.add(bDboToBPoj); 
    c.setConverters(converters); 
    return c; 
}

现在我试图重构，这样我可以避开2个地方写这篇

//..also includes conversion from BDbo to BPoj 
//..also includes conversion from BPoj to BDbo

，所以，我没有这在APojToADbo

@Autowired protected ConversionService conversionServ;

而且如果我做上面的，我得到以下异常

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.core.convert.ConversionService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

由于国际奥委会未在ConversionService豆尚未完成。循环依赖！

有this如何避免循环依赖好文章，但我想知道，如果Spring提供任何清洁剂/优雅的方式来做到这一点内部转换器

来源

2015-08-15 Anand Rockzz

我建议你返回ConversionService和设置的afterPropertiesSet

@Bean 
    public ConversionService getConversionService() { 
    ConversionServiceFactoryBean bean = new ConversionServiceFactoryBean(); 
      bean.setConverters(getConverters()); 

    bean.afterPropertiesSet(); 

    ConversionService object = bean.getObject(); 
    return object; 
      }

来源

2015-08-15 20:58:34 Mudassar

还是一样的问题 - '致：org.spr ingframework.beans.factory.BeanCurrentlyInCreationException：创建名为'getConversionService'的bean时出错：请求的bean当前正在创建：是否存在无法解析的循环引用？ –

最后我这样做是为了我的转换器：

class BaseConverter { 
    @Autowired 
    ApplicationContext alpCtx; 
    public ConversionService getConversaionService(){ 
     alpCtx.getBean("conversionService"); 
    } 
} 
class APojToADbo extends BaseConverter implements Converter<>{ 
    convert(){ 
     getConversaionService() //return lookup from alpCtx and return from Baseclass 
    } 
}

来源

2015-08-18 17:25:19

春季转换器重用

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