SpringMVC使用Swagger

Swagger 是一个规范和完整的框架，用于生成、描述、调用和可视化 RESTful 风格的 Web 服务。总体目标是使客户端和文件系统作为服务器以同样的速度来更新。文件的方法，参数和模型紧密集成到服务器端的代码，允许API来始终保持同步。
我们这里使用SpringBoot来快速搭建一个MVC，同时使用Swagger插件。
pom.xml，主要是引用swagger2 

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.6.RELEASE</version>
    <relativePath />
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger2</artifactId>
        <version>2.6.1</version>
    </dependency>
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger-ui</artifactId>
        <version>2.6.1</version>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

 Swagger2配置类

package cn.duanjt.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.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration
@EnableSwagger2
public class Swagger2 {
    /**
     * 创建API应用
     * apiInfo() 增加API相关信息
     * 通过select()函数返回一个ApiSelectorBuilder实例,用来控制哪些接口暴露给Swagger来展现，
     * 本例采用指定扫描的包路径来定义指定要建立API的目录。
     * 
     * @return
     */
    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("cn.duanjt.controller"))//指定要扫描的包名
                .paths(PathSelectors.any())
                .build();
    }
    
    /**
     * 创建该API的基本信息（这些基本信息会展现在文档页面中）
     * 访问地址：http://项目实际地址/swagger-ui.html
     * @return
     */
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("Spring Boot中使用Swagger2构建RESTful APIs")
                .description("更多请关注http://www.baidu.com")
                .termsOfServiceUrl("http://www.baidu.com")
                .contact("段江涛")
                .version("1.0")
                .build();
    }
}

 控制器StudentController

package cn.duanjt.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import cn.duanjt.pojo.Student;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiOperation;

@RestController
@RequestMapping("/student")
@Api(description = "学生信息")
public class StudentController {

    @RequestMapping(path = "/getAll", method = RequestMethod.GET)
    @ApiOperation(value = "获取所有用户信息", notes = "备注:获取所有用户信息")
    public Student getAll() {
        Student stu = new Student(1, "zhangsan", 20);
        return stu;
    }

    @RequestMapping(path = "/getById", method = RequestMethod.GET)
    @ApiOperation(value = "根据Id查询用户信息", notes = "备注:根据Id查询用户信息")
    @ApiImplicitParam(paramType = "query", name = "id", value = "用户id", required = true, dataType = "Integer")
    public Student getById(int id) {
        Student stu = new Student(id, "zhangsan", 20);
        return stu;
    }
    
    @RequestMapping(path = "/insert", method = RequestMethod.POST)
    @ApiOperation(value = "新增用户信息", notes = "备注:新增用户信息")
    public String insert(Student student){
        System.out.println(student.toString());
        return "成功";
    }
}

 说明:

1.需要在配置类Swagger2中指定需要扫描的包名
2.@Api标记在类上面，用于表示该类需要被Swagger扫描
3.@ApiOperation标记方法
4.@ApiImplicitParam标记方法，描述参数信息

运行之后，在浏览器输入：http://localhost:8080/swagger-ui.html

原文参考：https://blog.csdn.net/sanyaoxu_2/article/details/80555328