Spring SpEL-用于创建字符串和自定义对象映射的表达语言
我正在使用 示例从属性文件中读取以下内容。
sub.region.data={\ AF: {'subRegionCd' : '34', 'subRegionName' : 'Southern Asia', 'subRegionDesc': '', 'status' : 'A'} \
}
我在下面用过,但是不起作用
@Value("#{${sub.region.data}}")private Map<String, SubRegion> subRegionsMap;
SubRegion.java
public class SubRegion { private String subRegionCd;
private String subRegionName;
private String subRegionDesc;
private String subRegionStatus;
}
我低于错误
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert value of type 'java.util.Collections$UnmodifiableMap' to required type 'java.util.Map'; nested exception is java.lang.IllegalStateException: Cannot convert value of type 'java.util.Collections$UnmodifiableMap' to required type 'com.xxxxxx.model.SubRegion': no matching editors or conversion strategy found at org.springframework.beans.TypeConverterSupport.convertIfNecessary(TypeConverterSupport.java:76) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1195) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1167) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
... 54 common frames omitted
Caused by: java.lang.IllegalStateException: Cannot convert value of type 'java.util.Collections$UnmodifiableMap' to required type 'com.xxxxxx.model.SubRegion': no matching editors or conversion strategy found
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:262) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.TypeConverterDelegate.convertToTypedMap(TypeConverterDelegate.java:608) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:182) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
at org.springframework.beans.TypeConverterSupport.convertIfNecessary(TypeConverterSupport.java:73) ~[spring-beans-5.1.5.RELEASE.jar:5.1.5.RELEASE]
... 57 common frames omitted
回答:
看来您之后犯了一个错误'subRegionDesc',
,我认为您的意思是使用冒号,而不是逗号
通过Spring Boot" title="Spring Boot">Spring Boot,我建议您使用ConfigurationProperties而不是@Value
。
例如,在这种情况下,您必须:
放入
@EnableConfigurationProperties(SubRegionConfig.class)
您的spring配置类之一。创建配置类:
@ConfigurationProperties(prefix = "sub.region") public static class SubRegionConfig {
private Map<String, SubRegion> data;
//getters and setters
}
- 使用
.yml
代替.properties
,例如:
sub: region:
data:
AF:
subRegionCd: '34'
subRegionName: 'Southern Asia'
subRegionDesc: ''
subRegionStatus: 'A'
- 之后,您可以从中获得所需的所有属性。
SubRegionConfing
@Autowired private SubRegionConfig subRegionConfig;
ConfigurationsProperties
在大多数情况下更复杂,但更易于使用。
以上是 Spring SpEL-用于创建字符串和自定义对象映射的表达语言 的全部内容, 来源链接: utcz.com/qa/411095.html