Java B2B2C o2o多用戶商城 springcloud架構（十一）springboot集成swagger2，構建優雅的Restful API

swagger,中文「拽」的意思。它是一個功能強大的api框架，它的集成很是簡單，不只提供了在線文檔的查閱，並且還提供了在線文檔的測試。另外swagger很容易構建restful風格的api，簡單優雅帥氣，正如它的名字。

1、引入依賴

<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>

2、寫配置類

@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構建api文檔")
                .description("簡單優雅的restfun風格，http://blog.csdn.net/forezp")
                .termsOfServiceUrl("http://blog.csdn.net/forezp")
                .version("1.0")
                .build();
    }
}

經過@Configuration註解，代表它是一個配置類，@EnableSwagger2開啓swagger2。apiINfo()配置一些基本的信息。apis()指定掃描的包會生成文檔。

3、寫生產文檔的註解

swagger經過註解代表該接口會生成文檔，包括接口名、請求方法、參數、返回信息的等等。

• @Api：修飾整個類，描述Controller的做用
• @ApiOperation：描述一個類的一個方法，或者說一個接口
• @ApiParam：單個參數描述
• @ApiModel：用對象來接收參數
• @ApiProperty：用對象接收參數時，描述對象的一個字段
• @ApiResponse：HTTP響應其中1個描述
• @ApiResponses：HTTP響應總體描述
• @ApiIgnore：使用該註解忽略這個API
• @ApiError ：發生錯誤返回的信息
• @ApiParamImplicitL：一個請求參數
• @ApiParamsImplicit 多個請求參數

如今經過一個栗子來講明：

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.*;

/**
 * 用戶建立某本圖書 POST    /books/
 * 用戶修改對某本圖書    PUT /books/:id/
 * 用戶刪除對某本圖書    DELETE  /books/:id/
 * 用戶獲取全部的圖書 GET /books
 *  用戶獲取某一圖書  GET /Books/:id
 * Created by fangzhipeng on 2017/4/17.
 * 官方文檔：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="獲取圖書列表", notes="獲取圖書列表")
    @RequestMapping(value={""}, method= RequestMethod.GET)
    public List<Book> getBook() {
        List<Book> book = new ArrayList<>(books.values());
        return book;
    }

    @ApiOperation(value="建立圖書", notes="建立圖書")
    @ApiImplicitParam(name = "book", value = "圖書詳細實體", required = true, dataType = "Book")
    @RequestMapping(value="", method=RequestMethod.POST)
    public String postBook(@RequestBody Book book) {
        books.put(book.getId(), book);
        return "success";
    }
    @ApiOperation(value="獲圖書細信息", notes="根據url的id來獲取詳細信息")
    @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="根據url的id來指定更新圖書信息")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "id", value = "圖書ID", required = true, dataType = "Long",paramType = "path"),
            @ApiImplicitParam(name = "book", value = "圖書實體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="刪除圖書", notes="根據url的id來指定刪除圖書")
    @ApiImplicitParam(name = "id", value = "圖書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//使用該註解忽略這個API
    @RequestMapping(value = "/hi", method = RequestMethod.GET)
    public String  jsonTest() {
        return " hi you!";
    }
}

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