Spring Boot 入门（七）：集成 swagger2

本片文章是基于前一篇写的，《Spring Boot 入门（六）：集成 treetable 和 zTree 实现树形图》，本篇主要介绍了spring boot集成swagger2。关于swagger的介绍，自行谷歌。我这里有在网上购买的相关视频资料，有需要可以呼叫我。

1.引入相关依赖

  <dependency>
             <groupId>io.springfox</groupId>
             <artifactId>springfox-swagger2</artifactId>
             <version>2.4.0</version>
         </dependency>
         <dependency>
             <groupId>io.springfox</groupId>
             <artifactId>springfox-swagger-ui</artifactId>
             <version>2.4.0</version>
         </dependency>

         <dependency>
             <groupId>org.apache.directory.studio</groupId>
             <artifactId>org.apache.commons.codec</artifactId>
             <version>1.8</version>
         </dependency>

很多地方只引入了前2个依赖，这里如果缺少第3个依赖，容易产生一个异常： java.lang.NoSuchMethodError: com.google.common.collect.FluentIterable.toList()Lcom/google/common/collect/ImmutableList;

2.增加conf

 import io.swagger.annotations.ApiOperation;
 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.builders.RequestHandlerSelectors;
 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;

 /**
  * @program:
  * @description: Swagger配置
  * @author: DZ
  * @create: 2019-10-14 18:41
  **/
 @Configuration
 @EnableSwagger2
 public class SwaggerConfig {

     @Bean
     public Docket createRestApi() {
         return new Docket(DocumentationType.SWAGGER_2)
                 .apiInfo(apiInfo())
                 .select()
                 // 设置basePackage会将包下的所有类的所有方法作为api
 //                .apis(RequestHandlerSelectors.basePackage("com.example.demo2.controller"))
                 //只有标记了@ApiOperation的方法才会暴露出给swagger
                 .apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))
                 .paths(PathSelectors.any())
                 .build();
     }

     private ApiInfo apiInfo() {
         //swagger2中termsOfServiceUrl方法已经启用，且contact的参数时一个对象，弃用字符串了
         Contact contact=new Contact("dz",
                 "https://www.cnblogs.com/dz-boss/p/11729334.html","3541437581@qq.com");
         return new ApiInfoBuilder()
                 .title("xx项目说明文档")
                 .description("xx系统说明")
                 //.termsOfServiceUrl("https://www.cnblogs.com/dz-boss/p/11729334.html")
                 .contact(contact)
                 .version("1.0")
                 .build();
     }

 }

其中Contact构造函数中3个参数依次是：作者，地址，邮箱

3.增加注解

 import io.swagger.annotations.*;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.amqp.rabbit.connection.CorrelationData;
 import org.springframework.amqp.rabbit.core.RabbitTemplate;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.*;

 /**
  * @program:
  * @description:
  * @author: DZ
  * @create: 2019-10-09 15:27
  **/
 @Api(value = "API接口", tags = "Test", description = "API接口")
 @Slf4j 
@Controller
 public class Test {

     //测试接口
     @ApiOperation(value = "测试", notes = "测试接口")
     @ApiImplicitParams({
             @ApiImplicitParam(name = "id", value = "id", required = true, dataType = "String", paramType = "query", defaultValue = "123"),
             @ApiImplicitParam(name = "userId", value = "用户id", required = false, dataType = "String", paramType = "query", defaultValue = "654")
     })
     @ApiResponses(value = {
             @ApiResponse(code = 200, message = "Successful — 请求已完成"),
             @ApiResponse(code = 400, message = "请求中有语法问题，或不能满足请求"),
             @ApiResponse(code = 401, message = "未授权客户机访问数据"),
             @ApiResponse(code = 404, message = "服务器找不到给定的资源；文档不存在"),
             @ApiResponse(code = 500, message = "服务器不能完成请求")}
     )
     @ResponseBody
     @RequestMapping(value = "index", method = RequestMethod.POST)
     public String test(@RequestParam("id") String id, @RequestParam(value = "userId", required = false) String userId) {
         return "";
     }
 }

其中关键的注解为类的注解：@Api和方法的注解@ApiOperation，增加了这2个注解，就可以通过swagger的方式访问；

@ApiImplicitParams和@ApiResponses这2个注解主要对入参和出参进行增加中文注解，可有可无。

最后还需要在启动类增加注解@EnableSwagger2

访问：http://localhost:8080/swagger-ui.html