java使用spring。应用应用程序的json。spring boot中的属性文件

Question

我试图使用spring文档中的命令-Dspring.application.json='{"foo":{"bar":"spam"}}'，但在IntelliJ的run命令中看到它时，它总是会失败Could not resolve placeholder

我尝试使用系统变量和Java Ops变量，但没有成功

我所拥有的代码： 应用属性：

testing=${foo.bar}

申请。爪哇

@SpringBootApplication
@ComponentScan
public class Application extends RepositoryRestMvcConfiguration {

    @Value("${testing:}")
    private String input;

    public static void main(final String args[]) {
        SpringApplication.run(Application.class, args);
    }

    @Bean
    public BatchDetails set() {
        System.out.println("input: " + input);
        return new BatchDetails("Test", "Test2");
    }
}

IntelliJ虚拟机选项： -Dspring.application.json='{"foo":{"bar":"spam"}}'

IntelliJ环境变量： SPRING_APPLICATION_JSON = '{"foo":{"bar":"spam"}}'

启动应用程序时，我会得到以下堆栈跟踪：

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'foo.bar' in string value "${foo.bar}"
at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:174) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:126) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:204) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:178) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.core.env.AbstractPropertyResolver.resolveNestedPlaceholders(AbstractPropertyResolver.java:195) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:87) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:60) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.core.env.AbstractEnvironment.getProperty(AbstractEnvironment.java:531) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer$1.getProperty(PropertySourcesPlaceholderConfigurer.java:132) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer$1.getProperty(PropertySourcesPlaceholderConfigurer.java:129) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:84) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.core.env.PropertySourcesPropertyResolver.getPropertyAsRawString(PropertySourcesPropertyResolver.java:70) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.core.env.AbstractPropertyResolver$1.resolvePlaceholder(AbstractPropertyResolver.java:207) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:153) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:126) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:204) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:178) ~[spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer$2.resolveStringValue(PropertySourcesPlaceholderConfigurer.java:172) ~[spring-context-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:808) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1027) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
... 80 common frames omitted

我只是把配置放错地方了吗

Answer 1

我试图将-Dspring.application.json='{"foo":{"bar":"spam"}}'添加到测试中，但它无法正确解析。 你可以试试 spring.application.json={\"foo\":\"bar\"}，它效果很好

实际上，当spring运行时，它会将配置选项解析到环境中，如图所示。首先，将CommandArgues解析为PropertySource name='commandLineArgs'，然后在SpringApplicationJsonEnvironmentPostProcessor解析后，将spring.application.json中的值拆分为一个单独的PropertySource名称spring.application.json

parsered bySpringApplicationJsonEnvironmentPostProcessor