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我在春季 5 收到以下错误，并且已经阅读了有关此问题的所有帖子，但没有运气。我刚刚重构了应用程序以通过 PropertiesConfig 类而不是 appliationContext.xml 使用 @Configuration 来进行属性占位符定义

Unsatisfied dependency expressed through field 'secureExpirationHours'; nested 
exception is org.springframework.beans.TypeMismatchException: Failed to convert 
value of type 'java.lang.String' to required type 'int'; nested exception is 
java.lang.NumberFormatException: For input string: "${asset.href.expiration.hours.secure}

引用变量：

public class TestRepository {
    @Value("${asset.href.expiration.hours.secure}")
    private int secureExpirationHours;
}

混合配置：

@Configuration
@ComponentScan
@Import({PropertiesConfig.class})
@ImportResource({
    "classpath:META-INF/spring/applicationContext-assets.xml",
    "classpath:META-INF/spring/applicationContext-mongo.xml",
    "classpath:META-INF/spring/applicationContext-security.xml",
    "classpath:META-INF/spring/applicationContext.xml"})
public class CoreConfig {
}

属性配置类：

@Configuration
public class PropertiesConfig {

    public static PropertySourcesPlaceholderConfigurer commonEnvConfig;

    @Bean(name="commonConfig")
    public static PropertiesFactoryBean commonConfig() {
        PropertiesFactoryBean commonConfig = new PropertiesFactoryBean();
        commonConfig.setLocation(new ClassPathResource("META-INF/spring/config.properties"));
        return commonConfig;
    }

    @Bean(name="envProperties")
    public static YamlPropertiesFactoryBean yamlProperties() {
          YamlPropertiesFactoryBean yaml = new YamlPropertiesFactoryBean();
          yaml.setResources(new ClassPathResource("application-dev.yaml"));
          return yaml;
    }

    @Bean(name="commonConfigPropertyPlaceholder")
    public static PropertySourcesPlaceholderConfigurer commonConfigPropertyPlaceholder() throws IOException {
        if (commonEnvConfig == null) {
            commonEnvConfig = new PropertySourcesPlaceholderConfigurer();
        }

        PropertiesFactoryBean commonConfig = PropertiesConfig.commonConfig();
        try {
            commonEnvConfig.setProperties(commonConfig.getObject());
        } catch (IOException e) {
            e.printStackTrace();
            throw e;
        }

        YamlPropertiesFactoryBean yaml = PropertiesConfig.yamlProperties();
        commonEnvConfig.setProperties(yaml.getObject());
        commonEnvConfig.setIgnoreUnresolvablePlaceholders(true);

        return commonEnvConfig;
    }
}

请并感谢您的帮助！

4

1 回答 1

0

找出问题 - 有两个。

首先，您必须调用 .afterPropertiesSet(); 在 PropertiesFactoryBean 上，否则 .getObject() 返回 null。

@Bean(name="commonConfig")
public static PropertiesFactoryBean commonConfig() throws IOException {
    PropertiesFactoryBean commonConfig = new PropertiesFactoryBean();
    commonConfig.setLocation(new ClassPathResource("META-INF/spring/config.properties"));
    try {
        commonConfig.afterPropertiesSet();
    }
    catch (IOException e) {
        e.printStackTrace();
        throw e;
    }
    return commonConfig;
}

其次，您必须使用以下两个属性调用 PropertySourcesPlaceholderConfigurer 上的“setPropertiesArray()”：

    PropertySourcesPlaceholderConfigurer commonEnvConfig = new PropertySourcesPlaceholderConfigurer();
    commonEnvConfig.setPropertiesArray(commonConfig().getObject(), yamlProperties().getObject());
于 2018-05-02T16:58:36.313 回答