（转） SpringBoot非官方教程 | 第十一篇：springboot集成swagger2，构建优雅的Restful API

swagger,中文“拽”的意思。它是一个功能强大的api框架，它的集成非常简单，不仅提供了在线文档的查阅，而且还提供了在线文档的测试。另外swagger很容易构建restful风格的api，简单优雅帅气，正如它的名字。

一、引入依赖

<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>

二、写配置类

@Configuration
@EnableSwagger2
public class Swagger2 {
 
    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.forezp.controller"))
                .paths(PathSelectors.any())
                .build();
    }
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title("springboot利用swagger构建api文档")
                .description("简单优雅的restfun风格，http://blog.csdn.net/forezp")
                .termsOfServiceUrl("http://blog.csdn.net/forezp")
                .version("1.0")
                .build();
    }
}

通过@Configuration注解，表明它是一个配置类，@EnableSwagger2开启swagger2。apiINfo()配置一些基本的信息。apis()指定扫描的包会生成文档。

三、写生产文档的注解

swagger通过注解表明该接口会生成文档，包括接口名、请求方法、参数、返回信息的等等。

@Api：修饰整个类，描述Controller的作用
@ApiOperation：描述一个类的一个方法，或者说一个接口
@ApiParam：单个参数描述
@ApiModel：用对象来接收参数
@ApiProperty：用对象接收参数时，描述对象的一个字段
@ApiResponse：HTTP响应其中1个描述
@ApiResponses：HTTP响应整体描述
@ApiIgnore：使用该注解忽略这个API
@ApiError ：发生错误返回的信息
@ApiParamImplicitL：一个请求参数
@ApiParamsImplicit 多个请求参数

现在通过一个栗子来说明：

package com.forezp.controller;
 
import com.forezp.entity.Book;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.*;
import springfox.documentation.annotations.ApiIgnore;
 
import java.util.*;
 
/**
 * 用户创建某本图书 POST    /books/
 * 用户修改对某本图书    PUT /books/:id/
 * 用户删除对某本图书    DELETE  /books/:id/
 * 用户获取所有的图书 GET /books
 *  用户获取某一图书  GET /Books/:id
 * Created by fangzhipeng on 2017/4/17.
 * 官方文档：http://swagger.io/docs/specification/api-host-and-base-path/
 */
@RestController
@RequestMapping(value = "/books")
public class BookContrller {
 
    Map<Long, Book> books = Collections.synchronizedMap(new HashMap<Long, Book>());
 
    @ApiOperation(value="获取图书列表", notes="获取图书列表")
    @RequestMapping(value={""}, method= RequestMethod.GET)
    public List<Book> getBook() {
        List<Book> book = new ArrayList<>(books.values());
        return book;
    }
 
    @ApiOperation(value="创建图书", notes="创建图书")
    @ApiImplicitParam(name = "book", value = "图书详细实体", required = true, dataType = "Book")
    @RequestMapping(value="", method=RequestMethod.POST)
    public String postBook(@RequestBody Book book) {
        books.put(book.getId(), book);
        return "success";
    }
    @ApiOperation(value="获图书细信息", notes="根据url的id来获取详细信息")
    @ApiImplicitParam(name = "id", value = "ID", required = true, dataType = "Long",paramType = "path")
    @RequestMapping(value="/{id}", method=RequestMethod.GET)
    public Book getBook(@PathVariable Long id) {
        return books.get(id);
    }
 
    @ApiOperation(value="更新信息", notes="根据url的id来指定更新图书信息")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "id", value = "图书ID", required = true, dataType = "Long",paramType = "path"),
            @ApiImplicitParam(name = "book", value = "图书实体book", required = true, dataType = "Book")
    })
    @RequestMapping(value="/{id}", method= RequestMethod.PUT)
    public String putUser(@PathVariable Long id, @RequestBody Book book) {
        Book book1 = books.get(id);
        book1.setName(book.getName());
        book1.setPrice(book.getPrice());
        books.put(id, book1);
        return "success";
    }
    @ApiOperation(value="删除图书", notes="根据url的id来指定删除图书")
    @ApiImplicitParam(name = "id", value = "图书ID", required = true, dataType = "Long",paramType = "path")
    @RequestMapping(value="/{id}", method=RequestMethod.DELETE)
    public String deleteUser(@PathVariable Long id) {
        books.remove(id);
        return "success";
    }
 
    @ApiIgnore//使用该注解忽略这个API
    @RequestMapping(value = "/hi", method = RequestMethod.GET)
    public String  jsonTest() {
        return " hi you!";
    }
}