解决 高版本SpringBoot整合Swagger 报错Failed to start bean 'documentationPluginsBootstrapper' 问题

• • • 一、控制台报错信息
    • 二、问题解决，配置WebMvcConfigurer.java
    • 三、项目启动
    • 四、swagger访问，http://localhost:8080/doc.html

GitHub: link. 欢迎star

友情链接：SpringBoot 整合 Swagger

注意：本篇博客风格（不多比比就是撸代码!!!）

一、控制台报错信息

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-12-29 14:45:30 [main] ERROR org.springframework.boot.SpringApplication - Application run failed
org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181)
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54)
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155)
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123)
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:412)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:302)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290)
	at com.andon.springbootutil.SpringBootUtilApplication.main(SpringBootUtilApplication.java:12)
Caused by: java.lang.NullPointerException: null
	at springfox.documentation.spi.service.contexts.Orderings$8.compare(Orderings.java:112)
	at springfox.documentation.spi.service.contexts.Orderings$8.compare(Orderings.java:109)
	at com.google.common.collect.ComparatorOrdering.compare(ComparatorOrdering.java:40)
	at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355)
	at java.util.TimSort.sort(TimSort.java:220)
	at java.util.Arrays.sort(Arrays.java:1438)
	at com.google.common.collect.Ordering.sortedCopy(Ordering.java:854)
	at springfox.documentation.spring.web.plugins.WebMvcRequestHandlerProvider.requestHandlers(WebMvcRequestHandlerProvider.java:57)
	at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper$2.apply(DocumentationPluginsBootstrapper.java:138)
	at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper$2.apply(DocumentationPluginsBootstrapper.java:135)
	at com.google.common.collect.Iterators$6.transform(Iterators.java:826)
	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:52)
	at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:52)
	at com.google.common.collect.Iterators$ConcatenatedIterator.hasNext(Iterators.java:1404)
	at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:275)
	at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:239)
	at com.google.common.collect.FluentIterable.toList(FluentIterable.java:631)
	at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.defaultContextBuilder(DocumentationPluginsBootstrapper.java:111)
	at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.buildContext(DocumentationPluginsBootstrapper.java:96)
	at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start(DocumentationPluginsBootstrapper.java:167)
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178)
	... 14 common frames omitted
Disconnected from the target VM, address: '127.0.0.1:60500', transport: 'socket'

Process finished with exit code 1

二、问题解决，配置WebMvcConfigurer.java

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

/**
 * @author Andon
 * 2021/12/29
 */
@Configuration
public class WebMvcConfigurer extends WebMvcConfigurationSupport {

    /**
     * 发现如果继承了WebMvcConfigurationSupport，则在yml中配置的相关内容会失效。 需要重新指定静态资源
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**").addResourceLocations(
                "classpath:/static/");
        registry.addResourceHandler("swagger-ui.html", "doc.html").addResourceLocations(
                "classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations(
                "classpath:/META-INF/resources/webjars/");
        super.addResourceHandlers(registry);
    }

}

三、项目启动

四、swagger访问，http://localhost:8080/doc.html

GitHub: link. 欢迎star

友情链接：SpringBoot 整合 Swagger