Question

我有这个，

import org.apache.log4j.Logger;

@Configuration
@PropertySource("classpath:abc.properties")
public class AbcConfig {

  @Value("${test.testLogger}")
  private Logger logger;

  @Bean
  public static PropertySourcesPlaceholderConfigurer propertyConfigIn() {
    return new PropertySourcesPlaceholderConfigurer();
  }

然后在我的java代码中，我希望在使用Properties创建AnnotationContext时传入该类的Logger，

context = new AnnotationConfigApplicationContext();
Properties prop = new Properties();
prop.put("test.testLogger", getLogger());
context.getEnvironment().getPropertySources().addLast(new PropertiesPropertySource("test", prop));
context.register(AbcConfig.class);
context.refresh();

不幸的是，当我运行这个时，我得到以下异常，

Caused by: java.lang.IllegalArgumentException: Cannot convert value [org.apache.log4j.Logger@5f015823] from source type [Logger] to target type [String]
at org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:84)
at org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:59)
at org.springframework.core.env.AbstractEnvironment.getProperty(AbstractEnvironment.java:427)
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer$1.getProperty(PropertySourcesPlaceholderConfigurer.java:131)
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer$1.getProperty(PropertySourcesPlaceholderConfigurer.java:128)
at org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:73)
at org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:59)
at org.springframework.core.env.AbstractPropertyResolver$1.resolvePlaceholder(AbstractPropertyResolver.java:176)
at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:146)
at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:125)
at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:174)
at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:143)
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer$2.resolveStringValue(PropertySourcesPlaceholderConfigurer.java:167)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:755)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:778)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:768)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:486)
... 32 more

所以在我看来，使用@Value只适用于String（也许是整数）。这是使用Spring 3.2.2。是否有解决方法（使用Logger或任何其他非字符串对象）？

Spring：将@Value用于非String属性

0 个答案: