[Java] SpringBoot＋Swagger-ui自动生成API文档

<dependency>
    <groupid>io.springfox</groupid>
    <artifactid>springfox-swagger2</artifactid>
    <version>2.2.2</version>
  </dependency>
  <dependency>
    <groupid>io.springfox</groupid>
    <artifactid>springfox-swagger-ui</artifactid>
    <version>2.2.2</version>
</dependency>

package com.abel.example;
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;
/**
 * created by yangyibo on 2018/9/7.
 */
@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("com.abel.example.controller"))
    .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https://blog.csdn.net/u012373815")
    .termsofserviceurl("https://blog.csdn.net/u012373815")
    .contact("abel")
    .version("1.0")
    .build();
  }
}

package com.abel.example.controller;
import javax.servlet.http.httpservletrequest;
import java.util.map;
import com.abel.example.bean.user;
import io.swagger.annotations.*;
import org.apache.log4j.logger;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.http.httpstatus;
import org.springframework.http.responseentity;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.*;
import com.abel.example.service.userservice;
import com.abel.example.util.commonutil;
@controller
@requestmapping(value = "/users")
@api(value = "用户的增删改查")
public class usercontroller {
  @autowired
  private userservice userservice;
  /**
   * 查询所有的用户
   * api :localhost:8099/users
   * @return
   */
  @requestmapping(method = requestmethod.get)
  @responsebody
  @apioperation(value = "获取用户列表，目前没有分页")
  public responseentity<object> findall() {
  return new responseentity<>(userservice.listusers(), httpstatus.ok);
  }
  /**
   * 通过id 查找用户
   * api :localhost:8099/users/1
   * @param id
   * @return
   */
  @requestmapping(value = "/{id}", method = requestmethod.get)
  @responsebody
  @apioperation(value = "通过id获取用户信息", notes="返回用户信息")
  public responseentity<object> getuserbyid(@pathvariable integer id) {
  return new responseentity<>(userservice.getuserbyid(long.valueof(id)), httpstatus.ok);
  }
  /**
   * 通过spring data jpa 调用方法
   * api :localhost:8099/users/byname?username=xxx
   * 通过用户名查找用户
   * @param request
   * @return
   */
  @requestmapping(value = "/byname", method = requestmethod.get)
  @responsebody
  @apiimplicitparam(paramtype = "query",name= "username" ,value = "用户名",datatype = "string")
  @apioperation(value = "通过用户名获取用户信息", notes="返回用户信息")
  public responseentity<object> getuserbyusername(httpservletrequest request) {
  map<string, object> map = commonutil.getparametermap(request);
  string username = (string) map.get("username");
  return new responseentity<>(userservice.getuserbyusername(username), httpstatus.ok);
  }
  /**
   * 通过spring data jpa 调用方法
   * api :localhost:8099/users/byusernamecontain?username=xxx
   * 通过用户名模糊查询
   * @param request
   * @return
   */
  @requestmapping(value = "/byusernamecontain", method = requestmethod.get)
  @responsebody
  @apiimplicitparam(paramtype = "query",name= "username" ,value = "用户名",datatype = "string")
  @apioperation(value = "通过用户名模糊搜索用户信息", notes="返回用户信息")
  public responseentity<object> getusers(httpservletrequest request) {
  map<string, object> map = commonutil.getparametermap(request);
  string username = (string) map.get("username");
  return new responseentity<>(userservice.getbyusernamecontaining(username), httpstatus.ok);
  }
  /**
   * 添加用户啊
   * api :localhost:8099/users
   * @param user
   * @return
   */
  @requestmapping(method = requestmethod.post)
  @responsebody
  @apimodelproperty(value="user",notes = "用户信息的json串")
  @apioperation(value = "新增用户", notes="返回新增的用户信息")
  public responseentity<object> saveuser(@requestbody user user) {
  return new responseentity<>(userservice.saveuser(user), httpstatus.ok);
  }
  /**
   * 修改用户信息
   * api :localhost:8099/users
   * @param user
   * @return
   */
  @requestmapping(method = requestmethod.put)
  @responsebody
  @apimodelproperty(value="user",notes = "修改后用户信息的json串")
  @apioperation(value = "新增用户", notes="返回新增的用户信息")
  public responseentity<object> updateuser(@requestbody user user) {
  return new responseentity<>(userservice.updateuser(user), httpstatus.ok);
  }
  /**
   * 通过id删除用户
   * api :localhost:8099/users/2
   * @param id
   * @return
   */
  @requestmapping(value = "/{id}", method = requestmethod.delete)
  @responsebody
  @apioperation(value = "通过id删除用户信息", notes="返回删除状态1 成功 0 失败")
  public responseentity<object> deleteuser(@pathvariable integer id) {
  return new responseentity<>(userservice.removeuser(id.longvalue()), httpstatus.ok);
  }
}

@api：用在类上，说明该类的作用。
@apioperation：注解来给api增加方法说明。
@apiimplicitparams : 用在方法上包含一组参数说明。
@apiimplicitparam：用来注解来给方法入参增加说明。
@apiresponses：用于表示一组响应
@apiresponse：用在@apiresponses中，一般用于表达一个错误的响应信息
   code：数字，例如400
   message：信息，例如"请求参数没填好"
   response：抛出异常的类  
@apimodel：描述一个model的信息（一般用在请求参数无法使用@apiimplicitparam注解进行描述的时候）
@apimodelproperty：描述一个model的属性