springboot2集成knife4j

• springboot2集成knife4j
  • 环境说明
  • 集成knife4j
    • 第一步：引入依赖
    • 第二步：编写配置类
    • 第三步：测试一下
      • 第一小步：编写controller
      • 第二小步：启动项目，访问api文档
  • 相关资料

环境说明

• springboot：2.6.4
• knife4j-openapi2-spring-boot-starter：4.0.0

集成knife4j

第一步：引入依赖

<dependency><groupId>com.github.xiaoymin</groupId><artifactId>knife4j-openapi2-spring-boot-starter</artifactId><version>4.0.0</version>
</dependency>

第二步：编写配置类

提示：可以借助配置文件，进一步改造

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RestController;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.Contact;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2WebMvc;/*** Knife4j配置** @author <font size = "20" color = "#3CAA3C"><a href="https://gitee.com/JustryDeng">JustryDeng</a></font> <img* src="https://gitee.com/JustryDeng/shared-files/raw/master/JustryDeng/avatar.jpg" />* @since 1.0.0*/
@Slf4j
@Configuration
@EnableSwagger2WebMvc
public class Knife4jConfig {@Value("${spring.application.name:default}")private String applicationName;@Beanpublic Docket docket() {// 指定使用Swagger2规范return new Docket(DocumentationType.SWAGGER_2).apiInfo(new ApiInfoBuilder()// 简介(支持Markdown语法).description("# 我是API简介")// 服务地址.termsOfServiceUrl("http://local.idea-aedi.com/")// 作者及联系信息.contact(new Contact("JustryDeng", "https://gitee.com/JustryDeng", "13548417409@163.com"))// api版本.version("1.0.0").build())//分组名称(微服务项目可以用微服务名分组).groupName(applicationName).select()// 定位api.apis(RequestHandlerSelectors.basePackage(getProjectBasePackage()).and(RequestHandlerSelectors.withClassAnnotation(RestController.class).or(RequestHandlerSelectors.withClassAnnotation(Controller.class)))).paths(PathSelectors.any()).build();}/*** 获取项目包前缀*/private String getProjectBasePackage() {String projectBasePackage;String currPackageName = this.getClass().getPackage().getName();String[] packageItemArr = currPackageName.split("\\.");if (packageItemArr.length > 3) {projectBasePackage = String.join(".", packageItemArr[0], packageItemArr[1], packageItemArr[2]);} else {projectBasePackage = currPackageName;}log.info("Base package to scan api is -> {}", projectBasePackage);return projectBasePackage;}}

第三步：测试一下

第一小步：编写controller

import com.ideaaedi.demo.controller.model.UserAddReqVO;
import com.ideaaedi.demo.controller.model.UserDetailRespVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;/*** 用于测试knife4j的controller** @author <font size = "20" color = "#3CAA3C"><a href="https://gitee.com/JustryDeng">JustryDeng</a></font> <img* src="https://gitee.com/JustryDeng/shared-files/raw/master/JustryDeng/avatar.jpg" />* @since 1.0.0*/
@RestController
@Api(tags = "我是DemoController")
public class TestController {@GetMapping("/hello")@ApiOperation(value = "哈喽")public String hello(@ApiParam(name = "name", value = "姓名", required = true)@RequestParam String name) {return "hello " + name;}@PostMapping("/user/add")@ApiOperation(value = "新增用户")public UserDetailRespVO addUser(@RequestBody UserAddReqVO req) {UserDetailRespVO resp = new UserDetailRespVO();resp.setId(9527L);resp.setName(req.getName());resp.setAge(req.getAge());return resp;}@DeleteMapping("/user/delete/{id}")@ApiOperation(value = "删除用户")public Boolean addUser(@ApiParam(name = "id", value = "数据id", required = true) @PathVariable Long id) {return true;}/*** 测试 @RequestBody、@RequestParam、@PathVariable并存*/@PostMapping("/multi-anno/{id}")@ApiOperation(value = "组合使用测试")@ApiParampublic UserDetailRespVO testMultiAnno(@RequestBody UserAddReqVO req,@ApiParam(name = "name", value = "姓名", required = true)@RequestParam String name,@ApiParam(name = "id", value = "数据id", required = true)@PathVariable Long id) {UserDetailRespVO resp = new UserDetailRespVO();resp.setId(9527L);resp.setName(req.getName());resp.setAge(req.getAge());return resp;}}

此controller中用到的相关模型

• UserAddReqVO

  import io.swagger.annotations.ApiModelProperty;
  import lombok.Data;import javax.validation.constraints.NotBlank;/*** 用户新增req模型*/
  @Data
  public class UserAddReqVO {@ApiModelProperty(value = "姓名",required = true)@NotBlank(message = "姓名不能为空")private String name;@ApiModelProperty("年龄")private Integer age;
  }
  

• UserDetailRespVO

  import io.swagger.annotations.ApiModelProperty;
  import lombok.Data;/*** 用户详情resp模型*/
  @Data
  public class UserDetailRespVO {@ApiModelProperty("id")private Long id;@ApiModelProperty("姓名")private String name;@ApiModelProperty("年龄")private Integer age;
  }
  

第二小步：启动项目，访问api文档

启动项目后，直接访问http://{ip}:{端口}/doc.html即可

说明：

• 文档分组：可切换观察其余分组下的api
• 主页：概览
• Swagger Models：可以查看所有请求模型的信息
• 文档管理：可以导出文档、进行高级设置（如设置后处理脚本等）、进行全局参数设置、查看api信息
• 点击进入文档后，会展示api的详细信息，也可以进行调试，还可以打开api json数据等等

相关资料

• demo代码下载
• knife4j官网
• 本文已被收录进《程序员成长笔记》 ，笔者JustryDeng