Question

我正在尝试使用spring文档中的-Dspring.application.json='{"foo":{"bar":"spam"}}'命令，但在IntelliJ的run命令中看到它时，它总是以Could not resolve placeholder

失败

我尝试使用系统变量和Java Ops变量但没有成功。

我有什么代码明智： Application.properties：

testing=${foo.bar}

Application.java

@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 VM选项： -Dspring.application.json='{"foo":{"bar":"spam"}}'

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

在启动应用程序时，我得到以下堆栈跟踪：

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

我只是将配置放在错误的位置才能使用？

Answer 1

你无法扩展＆＃34;春天application.properties喜欢这样。这里的所有值和系统级spring.application.json都会加载到您的Environment变量中，您可以从那里访问foo.bar。

所以，基本上......

Spring从您的testing中获取{{1>}期望完全形成值，然后从系统变量获取JSON，期望完全形成< / strong> value并将它们合并到application.properties。

现在你可以做到

Environment

Answer 2

我尝试将-Dspring.application.json='{"foo":{"bar":"spam"}}'添加到测试中，但无法正确解析。您可以改用--spring.application.json={\"foo\":\"bar\"}，效果很好；

实际上，在运行Spring时，它将配置选项解析为环境，就像图片一样。首先，将命令参数解析为PropertySource name='commandLineArgs'，然后，由SpringApplicationJsonEnvironmentPostProcessor解析后，将值分割spring.application.json中插入一个孤独的PropertySource名称spring.application.json。

parsered bySpringApplicationJsonEnvironmentPostProcessor

在spring boot中使用spring.application.json for application.properties文件

2 个答案: