一、引入依赖
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.9.2</version>
</dependency>
二、编写配置类
@Configuration
@EnableSwagger2
public class Swagger2Config {
@Bean
public Docket UserApiConfig(){
return new Docket(DocumentationType.SWAGGER_2)
.groupName("UserApi")
.apiInfo(UserApiInfo())
.select()
.apis(RequestHandlerSelectors.basePackage("cn.ken.login.controller"))
.paths(PathSelectors.ant("/user/**"))
.build();
}
@Bean
public Docket BlogApiConfig(){
return new Docket(DocumentationType.SWAGGER_2)
.groupName("BlogApi")
.apiInfo(BlogApiInfo())
.select()
.apis(RequestHandlerSelectors.basePackage("cn.ken.login.controller"))
.paths(PathSelectors.ant("/blog/**"))
.build();
}
private ApiInfo UserApiInfo(){
return new ApiInfoBuilder()
.title("我的API文档")
.description("本文档描述了用户相关的接口定义")
.version("1.0")
.contact(new Contact("联系人名字", "联系人访问链接", "联系人邮箱"))
.build();
}
private ApiInfo BlogApiInfo(){
return new ApiInfoBuilder()
.title("我的API文档")
.description("本文档描述了博客相关的接口定义")
.version("1.0")
.contact(new Contact("联系人名字", "联系人访问链接", "联系人邮箱"))
.build();
}
}
三、测试
使用注解对接口进行描述(也可以省略)
访问http://localhost:8080/swagger-ui.html
四、坑点
1、运行报错
Caused by: java.lang.NullPointerException: null
at springfox.documentation.spi.service.contexts.Orderings$8.compare(Orderings.java:112) ~[springfox-spi-2.9.2.jar:null]
at springfox.documentation.spi.service.contexts.Orderings$8.compare(Orderings.java:109) ~[springfox-spi-2.9.2.jar:null]
at com.google.common.collect.ComparatorOrdering.compare(ComparatorOrdering.java:37) ~[guava-20.0.jar:na]
at java.util.TimSort.countRunAndMakeAscending(TimSort.java:351) ~[na:1.8.0_05]
at java.util.TimSort.sort(TimSort.java:216) ~[na:1.8.0_05]
at java.util.Arrays.sort(Arrays.java:1435) ~[na:1.8.0_05]
at com.google.common.collect.Ordering.sortedCopy(Ordering.java:855) ~[guava-20.0.jar:na]
at springfox.documentation.spring.web.plugins.WebMvcRequestHandlerProvider.requestHandlers(WebMvcRequestHandlerProvider.java:57) ~[springfox-spring-web-2.9.2.jar:null]
at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper$2.apply(DocumentationPluginsBootstrapper.java:138) ~[springfox-spring-web-2.9.2.jar:null]
at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper$2.apply(DocumentationPluginsBootstrapper.java:135) ~[springfox-spring-web-2.9.2.jar:null]
at com.google.common.collect.Iterators$7.transform(Iterators.java:750) ~[guava-20.0.jar:na]
at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:47) ~[guava-20.0.jar:na]
at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:47) ~[guava-20.0.jar:na]
at com.google.common.collect.MultitransformedIterator.hasNext(MultitransformedIterator.java:52) ~[guava-20.0.jar:na]
at com.google.common.collect.MultitransformedIterator.hasNext(MultitransformedIterator.java:50) ~[guava-20.0.jar:na]
at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:249) ~[guava-20.0.jar:na]
at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:209) ~[guava-20.0.jar:na]
at com.google.common.collect.FluentIterable.toList(FluentIterable.java:614) ~[guava-20.0.jar:na]
at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.defaultContextBuilder(DocumentationPluginsBootstrapper.java:111) ~[springfox-spring-web-2.9.2.jar:null]
at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.buildContext(DocumentationPluginsBootstrapper.java:96) ~[springfox-spring-web-2.9.2.jar:null]
at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start(DocumentationPluginsBootstrapper.java:167) ~[springfox-spring-web-2.9.2.jar:null]
at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) ~[spring-context-5.3.16.jar:5.3.16]
... 15 common frames omitted
原因:
Spring Boot 2.6及 更高版本使用的是PathPatternMatcher,而Springfox使用的路径匹配是基于AntPathMatcher的,所以更改配置如下:
spring:
mvc:
pathmatch:
matching-strategy: ANT_PATH_MATCHER
2、访问页面404
@EnableWebMvc注解(相当于继承WebMvcConfigurationSupport)和extends WebMvcConfigurationSupport导致404的原因都是因为同时有多个配置类实现了WebMvcConfigurer或继承了WebMvcConfigurationSupport的话,只会有一个生效,即以上两种情况导致了默认的WebMvcAutoConfiguration自动配置失效,故找不到静态资源。解决办法是,保持一个配置类,将配置都在一个类中设置。
解决方法:
在一个统一的WebConfig中实现WebMvcConfigurer,并重写其中的public void addResourceHandlers(ResourceHandlerRegistry registry)方法,重新指定swagger静态资源,如下:
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/**").addResourceLocations("classpath:/static/");
registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
}
3、页面被拦截器拦截
放行该页面,如下:
@Configuration
public class InterceptorConfig implements WebMvcConfigurer {
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new JWTInterceptor())
.excludePathPatterns("user/login")
.excludePathPatterns("user/register")
.excludePathPatterns("/swagger-resources/**")
.excludePathPatterns("/swagger-ui.html/**")
.excludePathPatterns("/webjars/**");
}
}
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