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。

引入依赖

<dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.8.0</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.8.0</version>
        </dependency>

写配置类

import org.springframework.beans.factory.annotation.Value;
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;


@Configuration
@EnableSwagger2
public class SwaggerConfig {
  
    Boolean swaggerEnabled = true;
    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                // 是否开启
                .enable(swaggerEnabled)//true
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.user.controller"))
                .paths(PathSelectors.any())
                .build();
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                //页面标题
                .title(" 测试使用 ")
                //创建人
                .contact(new Contact("clc", "http://www.baidu.com", ""))
                //版本号
                .version("1.0")
                //描述
                .description("API 描述")
                .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。

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 clc.user.controller;

import clc.user.bean.User;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiImplicitParams;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import springfox.documentation.annotations.ApiIgnore;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * ClassName: TestSwaggerController<br/>
 * Description: <br/>
 * date: 2018/11/30 10:06 AM<br/>
 *
 * @author chengluchao
 * @since JDK 1.8
 */
@Api(tags = "用户API")
@RestController
public class TestSwaggerController {

    Map<Object, User> users = Collections.synchronizedMap(new HashMap<Object, User>());

    @ApiOperation(value = "获取用户列表", notes = "获取用户列表")
    @RequestMapping(value = {"/getUser1"}, method = RequestMethod.GET)
    public List<User> getUser() {
        List<User> user = new ArrayList<>(users.values());
        return user;
    }

    @ApiOperation(value = "创建用户", notes = "创建用户")
    @ApiImplicitParam(name = "user", value = "用户详细实体", required = true, dataType = "User")
    @RequestMapping(value = "/createUser", method = RequestMethod.POST)
    public String postUser(@RequestBody User user) {
        users.put(user.getAge(), user);
        return "success";
    }

    @ApiOperation(value = "获用户细信息", 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 = "/byid", method = RequestMethod.GET)
    public User getUser(@PathVariable Long id) {
        return users.get(id);
    }

    @ApiOperation(value = "更新信息", notes = "根据url的id来指定更新用户信息")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long", paramType = "path"),
            @ApiImplicitParam(name = "user", value = "用户实体user", required = true, dataType = "User")
    })
    @RequestMapping(value = "/putid", method = RequestMethod.PUT)
    public String putUser(@PathVariable Long id, @RequestBody User user) {
        User user1 = users.get(id);
        user1.setName(user.getName());
        users.put(id, user1);
        return "success";
    }

    @ApiOperation(value = "删除用户", notes = "根据url的id来指定删除用户")
    @ApiImplicitParam(name = "id", value = "用户ID", required = true, dataType = "Long", paramType = "path")
    @RequestMapping(value = "/delid", method = RequestMethod.DELETE)
    public String deleteUser(@PathVariable Long id) {
        users.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!";
    }

}
http://localhost:8081/swagger-ui.html

Spring Boot 生成接口文档 swagger2_请求参数