问题描述
我的spring webflux项目中已经有了生成的代码，但是运行时，它抛出一个异常，提示“ openapi.yaml”文件不存在。我搜索了此文件，他位于生成的项目（由openapi生成）的资源文件夹中。如您所见，HomeController通过Resource属性声明中的classpath：/openapi.yaml获取此文件。 我只是在问这个问题，因为这是生成的类的错误，我不知道这是否应该发生。
资源声明
@Value("classpath:/openapi.yaml")
private Resource openapi;
HomeController类
package org.openapitools.configuration;
import com.fasterxml.jackson.dataformat.yaml.YAMLMapper;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Controller;
import org.springframework.util.StreamUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.reactive.function.server.RouterFunction;
import org.springframework.web.reactive.function.server.ServerResponse;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.nio.charset.Charset;
import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
import static org.springframework.web.reactive.function.server.RouterFunctions.route;
/**
* Home redirection to OpenAPI api documentation
*/
@Controller
public class HomeController {
private static YAMLMapper yamlMapper = new YAMLMapper();
@Value("classpath:/openapi.yaml")
private Resource openapi;
@Bean
public String openapiContent() throws IOException {
try(InputStream is = openapi.getInputStream()) {
return StreamUtils.copyToString(is,Charset.defaultCharset());
}
}
@GetMapping(value = "/openapi.yaml",produces = "application/vnd.oai.openapi")
@ResponseBody
public String openapiYaml() throws IOException {
return openapiContent();
}
@GetMapping(value = "/openapi.json",produces = "application/json")
@ResponseBody
public Object openapiJson() throws IOException {
return yamlMapper.readValue(openapiContent(),Object.class);
}
@Bean
RouterFunction<ServerResponse> index() {
return route(
GET("/"),req -> ServerResponse.temporaryRedirect(URI.create("swagger-ui/index.html?url=../openapi.json")).build()
);
}
}
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-10-16 00:23:12.728 ERROR 30601 --- [ main] o.s.boot.SpringApplication : Application run Failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'openapiContent' defined in class path resource [org/openapitools/configuration/HomeController.class]: Bean instantiation via factory method Failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [java.lang.String]: Factory method 'openapiContent' threw exception; nested exception is java.io.FileNotFoundException: class path resource [openapi.yaml] cannot be opened because it does not exist
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:655) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:483) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.instantiateUsingFactoryMethod(AbstractAutowireCapablebeanfactory.java:1336) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.createBeanInstance(AbstractAutowireCapablebeanfactory.java:1176) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.doCreateBean(AbstractAutowireCapablebeanfactory.java:556) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.createBean(AbstractAutowireCapablebeanfactory.java:516) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.Abstractbeanfactory.lambda$doGetBean$0(Abstractbeanfactory.java:324) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.Abstractbeanfactory.doGetBean(Abstractbeanfactory.java:322) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.Abstractbeanfactory.getBean(Abstractbeanfactory.java:202) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.DefaultListablebeanfactory.preInstantiateSingletons(DefaultListablebeanfactory.java:897) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishbeanfactoryInitialization(AbstractApplicationContext.java:879) ~[spring-context-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:62) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.3.4.RELEASE.jar:2.3.4.RELEASE]
at com.gabriel.forum.ForumApplication.main(ForumApplication.java:10) ~[main/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [java.lang.String]: Factory method 'openapiContent' threw exception; nested exception is java.io.FileNotFoundException: class path resource [openapi.yaml] cannot be opened because it does not exist
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [java.lang.String]: Factory method 'openapiContent' threw exception; nested exception is java.io.FileNotFoundException: class path resource [openapi.yaml] cannot be opened because it does not exist
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:650) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
... 20 common frames omitted
Caused by: java.io.FileNotFoundException: class path resource [openapi.yaml] cannot be opened because it does not exist
Caused by: java.io.FileNotFoundException: class path resource [openapi.yaml] cannot be opened because it does not exist
at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:180) ~[spring-core-5.2.9.RELEASE.jar:5.2.9.RELEASE]
at org.openapitools.configuration.HomeController.openapiContent(HomeController.java:36) ~[main/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.9.RELEASE.jar:5.2.9.RELEASE]
... 21 common frames omitted
> Task :ForumApplication.main() Failed
Execution Failed for task ':ForumApplication.main()'.
> Process 'command '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java'' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
The resource folder and the project structure.
解决方法
我找到了解决方法。
只需在您的build.gralde或pom.xml“ interfaceOnly”：“ true”中添加一个配置选项。
该配置将仅生成您在inputSpec文件中声明的接口和类，并且HomeController将不再存在以查找openapi.yml文件。
该解决方案仅适用于春季webflux项目。
以下是gradle语法中的配置选项：
configOptions = [
dateLibrary: "java8",reactive: "true","interfaceOnly": "true"
]
Maven语法：
<configOptions>
<reactive>true</reactive>
<java8>true</java8>
<interfaceOnly>true</interfaceOnly>
</configOptions>