SwaggerUi是一个自动生成接口文档，并且还可以去测试这些接口的东西。

SpringBoot集成SwaggerUi

引入依赖

<properties> <swagger.version>2.6.1</swagger.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>${swagger.version}</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>${swagger.version}</version> </dependency> </dependencies>

编写Swagger配置类com.wjh.config.SwaggerConfig

package com.wjh.config;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import springfox.documentation.builders.ApiInfoBuilder;import springfox.documentation.builders.PathSelectors;import springfox.documentation.service.ApiInfo;import springfox.documentation.service.Contact;import springfox.documentation.spi.DocumentationType;import springfox.documentation.spring.web.plugins.Docket;import springfox.documentation.swagger2.annotations.EnableSwagger2;@Configuration //表示是Swagger的配置类@EnableSwagger2 //启用Swagger2public class SwaggerConfig { @Bean public Docket api(){ return new Docket(DocumentationType.SWAGGER_2) .apiInfo(apiInfo()) .pathMapping("/") .select() .paths(PathSelectors.regex("/.*")) .build(); } private ApiInfo apiInfo() { return new ApiInfoBuilder().title("我的接口文档") .contact(new Contact("wjh", "", "wjh_dan@163.com")) .description("这是swaggerUI生成的接口文档") .version("1.0.0.0") .build(); }}

编写接口方法类com.wjh.server.MyMethod

package com.wjh.server;import io.swagger.annotations.Api;import io.swagger.annotations.ApiOperation;import org.springframework.web.bind.annotation.*;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.util.HashMap;import java.util.Map;import java.util.Objects;@RestController@Api(value = "/", description = "全部的get方法") //Swagger的注解public class MyMethod { @RequestMapping(value = "/getCookies", method = RequestMethod.GET) @ApiOperation(value = "通过这个方法可以获取到cookies", httpMethod = "GET") //Swagger的注解 public String getCookies(HttpServletResponse response){ //HttpServletRequest 装请求信息的类 //HttpServletResponse 装相应信息的类 Cookie cookie = new Cookie("login", "true"); response.addCookie(cookie); return "恭喜你，获得cookies成功！"; } /** * 要求客户端携带cookies访问 * 这是一个需要携带cookies信息才能访问的get请求 */ @RequestMapping(value = "/get/with/cookies", method = RequestMethod.GET) @ApiOperation(value = "要求客户端携带cookies访问", httpMethod = "GET") //Swagger的注解 public String getWithCookies(HttpServletRequest request){ Cookie[] cookies = request.getCookies(); if (Objects.isNull(cookies)){ return "你必须携带cookies才能访问"; } for (Cookie cookie : cookies) { if (cookie.getName().equals("login") && cookie.getValue().equals("true")){ return "这是一个需要携带cookies信息才能访问的get请求"; } } return "你必须携带cookies才能访问"; } /** * 开发一个需要携带参数才能访问的get请求。 * 第一种实现方式， url：key=value&key=value * 模拟获取商品列表 */ @RequestMapping(value = "/get/with/param", method = RequestMethod.GET) @ApiOperation(value = "开发一个需要携带参数才能访问的get请求。第一种实现方式", httpMethod = "GET") //Swagger的注解 public Map<String, Integer> getList(@RequestParam Integer start, @RequestParam Integer end){ Map<String, Integer> myList = new HashMap<>(); myList.put("鞋", 400); myList.put("衬衫", 300); myList.put("干脆面", 1); myList.put("雪碧", 3); return myList; } /** * 开发一个需要携带参数才能访问的get请求。 * 第二种实现方式， url： ip:port/get/with/param/10/20 * 模拟获取商品列表 */ @RequestMapping(value = "/get/with/param/{start}/{end}") @ApiOperation(value = "开发一个需要携带参数才能访问的get请求。第二种实现方式", httpMethod = "GET") //Swagger的注解 public Map<String, Integer> myGetList(@PathVariable Integer start, @PathVariable Integer end) { Map<String, Integer> myList = new HashMap<>(); myList.put("雪碧", 3); myList.put("鞋", 400); myList.put("衬衫", 300); myList.put("可乐", 3); return myList; }}

编写启动类Application

import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.context.annotation.ComponentScan;@SpringBootApplication@ComponentScan("com.wjh")public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); }}

记一次启动时遇到的错误。（上面类中都是正确的）

2020-06-08 21:39:10.147 ERROR 5720 --- [ main] s.d.s.r.o.OperationHttpMethodReader : Invalid http method: GetValid ones are [[Lorg.springframework.web.bind.annotation.RequestMethod;@5477a1ca]java.lang.IllegalArgumentException: No enum constant org.springframework.web.bind.annotation.RequestMethod.Get at java.lang.Enum.valueOf(Enum.java:238) ~[na:1.8.0_25] at org.springframework.web.bind.annotation.RequestMethod.valueOf(RequestMethod.java:35) ~[spring-web-5.2.2.RELEASE.jar:5.2.2.RELEASE] at springfox.documentation.swagger.readers.operation.OperationHttpMethodReader.apply(OperationHttpMethodReader.java:49) ~[springfox-swagger-common-2.6.1.jar:2.6.1] at springfox.documentation.spring.web.plugins.DocumentationPluginsManager.operation(DocumentationPluginsManager.java:123) [springfox-spring-web-2.6.1.jar:2.6.1] at springfox.documentation.spring.web.readers.operation.ApiOperationReader.read(ApiOperationReader.java:73) [springfox-spring-web-2.6.1.jar:2.6.1] at springfox.documentation.spring.web.scanners.CachingOperationReader$1.load(CachingOperationReader.java:50) [springfox-spring-web-2.6.1.jar:2.6.1] at springfox.documentation.spring.web.scanners.CachingOperationReader$1.load(CachingOperationReader.java:48) [springfox-spring-web-2.6.1.jar:2.6.1] at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527) [guava-18.0.jar:na] at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319) [guava-18.0.jar:na] at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282) [guava-18.0.jar:na] at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197) [guava-18.0.jar:na] at com.google.common.cache.LocalCache.get(LocalCache.java:3937) [guava-18.0.jar:na] at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3941) [guava-18.0.jar:na] at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4824) [guava-18.0.jar:na] at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4830) [guava-18.0.jar:na] at springfox.documentation.spring.web.scanners.CachingOperationReader.read(CachingOperationReader.java:57) [springfox-spring-web-2.6.1.jar:2.6.1] at springfox.documentation.spring.web.scanners.ApiDescriptionReader.read(ApiDescriptionReader.java:66) [springfox-spring-web-2.6.1.jar:2.6.1] at springfox.documentation.spring.web.scanners.ApiListingScanner.scan(ApiListingScanner.java:89) [springfox-spring-web-2.6.1.jar:2.6.1] at springfox.documentation.spring.web.scanners.ApiDocumentationScanner.scan(ApiDocumentationScanner.java:70) [springfox-spring-web-2.6.1.jar:2.6.1] at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.scanDocumentation(DocumentationPluginsBootstrapper.java:85) [springfox-spring-web-2.6.1.jar:2.6.1] at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start(DocumentationPluginsBootstrapper.java:127) [springfox-spring-web-2.6.1.jar:2.6.1] at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:182) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:53) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:360) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:158) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:122) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:894) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:162) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) [spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at Application.main(Application.java:10) [classes/:na]

原因是在MyGetMethod类中：

@ApiOperation(value = "通过这个方法可以获取到cookies", httpMethod = "Get")

这个注解中httpMethod = "Get"出错。
将其改为：httpMethod = “GET”

@ApiOperation(value = "通过这个方法可以获取到cookies", httpMethod = "GET")

即可。

打开浏览器，输入http://localhost/swagger-ui.html

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