knife4j介绍及使用
knife4j介绍
knife4j是为Java MVC框架集成Swagger生成Api文档的增强解决方案,前身是swagger-bootstrap-ui,取名knife4j是希望它能像一把匕首一样小巧,轻量,并且功能强悍!其底层是对Springfox的封装，使用方式也和Springfox一致，只是对接口文档UI进行了优化。
核心功能：
文档说明：
根据Swagger的规范说明，详细列出接口文档的说明，包括接口地址、类型、请求示例、请求参数、响应示例、响应参数、响应码等信息，对该接口的使用情况一目了然。
在线调试：
提供在线接口联调的强大功能，自动解析当前接口参数,同时包含表单验证，调用参数可返回接口响应内容、headers、响应时间、响应状态码等信息，帮助开发者在线调试。
knife4j使用
第一步：创建maven工程knife4j_demo并配置pom.xml文件
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.2.2.RELEASE
cn.itcast
knife4j_demo
1.0-SNAPSHOT
org.springframework.boot
spring-boot-starter-web
com.github.xiaoymin
knife4j-spring-boot-starter
2.0.1
org.projectlombok
lombok
第二步： 创建实体类User和Menu
package cn.itcast.entity;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
/**
* 菜单实体
*/
@Data
@ApiModel(value = "菜单实体",description = "菜单实体")
public class Menu {
@ApiModelProperty(value = "主键")
private int id;
@ApiModelProperty(value = "菜单名称")
private String name;
}package cn.itcast.entity;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
/**
* 用户实体
*/
@ApiModel(value = "用户实体",description = "用户实体")
@Data
public class User {
@ApiModelProperty(value = "主键")
private int id;
@ApiModelProperty(value = "姓名")
private String name;
@ApiModelProperty(value = "年龄")
private int age;
@ApiModelProperty(value = "地址")
private String address;
}
第三步：创建UserController和MenuController
package cn.itcast.controller.user;
import cn.itcast.entity.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.*;
import java.util.ArrayList;
import java.util.List;
/**
* 用户控制器
*/
@RestController
@RequestMapping("/user")
@Api(tags = "用户控制器")
public class UserController {
@GetMapping("/getUsers")
@ApiOperation(value = "查询所有用户", notes = "查询所有用户信息")
public List getAllUsers(){
User user = new User();
user.setId(100);
user.setName("itcast");
user.setAge(20);
user.setAddress("bj");
List list = new ArrayList<>();
list.add(user);
return list;
}
@PostMapping("/save")
@ApiOperation(value = "新增用户", notes = "新增用户信息")
public String save(@RequestBody User user){
return "OK";
}
@PutMapping("/update")
@ApiOperation(value = "修改用户", notes = "修改用户信息")
public String update(@RequestBody User user){
return "OK";
}
@DeleteMapping("/delete")
@ApiOperation(value = "删除用户", notes = "删除用户信息")
public String delete(int id){
return "OK";
}
@ApiImplicitParams({
@ApiImplicitParam(name = "pageNum", value = "页码",
required = true, type = "Integer"),
@ApiImplicitParam(name = "pageSize", value = "每页条数",
required = true, type = "Integer"),
})
@ApiOperation(value = "分页查询用户信息")
@GetMapping(value = "page/{pageNum}/{pageSize}")
public String findByPage(@PathVariable Integer pageNum,
@PathVariable Integer pageSize) {
return "OK";
}
}
package cn.itcast.controller.menu;
import cn.itcast.entity.Menu;
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.*;
import java.util.ArrayList;
import java.util.List;
/**
* 菜单控制器
*/
@RestController
@RequestMapping("/menu")
@Api(tags = "菜单控制器")
public class MenuController {
@GetMapping("/getMenus")
@ApiOperation(value = "查询所有菜单", notes = "查询所有菜单信息")
public List第四步：创建属性类SwaggerProperties和配置类SwaggerAutoConfiguration
package cn.itcast.config;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* 配置属性类，用于封装yml配置文件中关于接口文档相关的配置信息
*/
@ConfigurationProperties(prefix = "pinda.swagger")
@Data
public class SwaggerProperties {
private String title = "在线文档"; //标题
private String group = ""; //自定义组名
private String description = "在线文档"; //描述
private String version = "1.0"; //版本
private Contact contact = new Contact(); //联系人
private String basePackage = "com.itheima.pinda"; //swagger会解析的包路径
private List basePath = new ArrayList<>(); //swagger会解析的url规则
private List excludePath = new ArrayList<>();//在basePath基础上需要排除的url规则
private Map docket = new LinkedHashMap<>(); //分组文档
public String getGroup() {
if (group == null || "".equals(group)) {
return title;
}
return group;
}
@Data
public static class DocketInfo {
private String title = "在线文档"; //标题
private String group = ""; //自定义组名
private String description = "在线文档"; //描述
private String version = "1.0"; //版本
private Contact contact = new Contact(); //联系人
private String basePackage = ""; //swagger会解析的包路径
private List basePath = new ArrayList<>(); //swagger会解析的url规则
private List excludePath = new ArrayList<>();//在basePath基础上需要排除的url
public String getGroup() {
if (group == null || "".equals(group)) {
return title;
}
return group;
}
}
@Data
public static class Contact {
private String name = "chen"; //联系人
private String url = ""; //联系人url
private String email = ""; //联系人email
}
}
package cn.itcast.config;
import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
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;
import java.util.*;
/**
* 配置类
*/
@Configuration
@EnableConfigurationProperties(SwaggerProperties.class)
@EnableSwagger2
@ConditionalOnProperty(name = "pinda.swagger.enabled", havingValue = "true",matchIfMissing = true)
public class SwaggerAutoConfiguration implements BeanFactoryAware {
private BeanFactory beanFactory;
@Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
this.beanFactory = beanFactory;
}
@Autowired
SwaggerProperties swaggerProperties;
@Bean
@ConditionalOnMissingBean
public List createRestApi(){
ConfigurableBeanFactory configurableBeanFactory =
(ConfigurableBeanFactory) beanFactory;
List docketList = new LinkedList<>();
if(swaggerProperties.getDocket().isEmpty()){
//没有分组
Docket docket = createDocket(swaggerProperties);
configurableBeanFactory.registerSingleton(swaggerProperties.getTitle(),docket);
docketList.add(docket);
}else{
//存在分组
Set keySet = swaggerProperties.getDocket().keySet();
for (String key : keySet) {
SwaggerProperties.DocketInfo docketInfo = swaggerProperties.getDocket().get(key);
ApiInfo apiInfo = new ApiInfoBuilder()
//页面标题
.title(docketInfo.getTitle())
//创建人
.contact(new Contact(docketInfo.getContact().getName(),
docketInfo.getContact().getUrl(),
docketInfo.getContact().getEmail()))
//版本号
.version(docketInfo.getVersion())
//描述
.description(docketInfo.getDescription())
.build();
// base-path处理
// 当没有配置任何path的时候，解析/**
if (docketInfo.getBasePath().isEmpty()) {
docketInfo.getBasePath().add("/**");
}
List> basePath = new ArrayList<>();
for (String path : docketInfo.getBasePath()) {
basePath.add(PathSelectors.ant(path));
}
// exclude-path处理
List> excludePath = new ArrayList<>();
for (String path : docketInfo.getExcludePath()) {
excludePath.add(PathSelectors.ant(path));
}
Docket docket = new Docket(DocumentationType.SWAGGER_2)
.apiInfo(apiInfo)
.groupName(docketInfo.getGroup())
.select()
//为当前包路径
.apis(RequestHandlerSelectors.basePackage(docketInfo.getBasePackage()))
.paths(Predicates.and(Predicates.not(Predicates.or(excludePath)),Predicates.or(basePath)))
.build();
configurableBeanFactory.registerSingleton(key, docket);
docketList.add(docket);
}
}
return docketList;
}
//构建 api文档的详细信息
private ApiInfo apiInfo(SwaggerProperties swaggerProperties) {
return new ApiInfoBuilder()
//页面标题
.title(swaggerProperties.getTitle())
//创建人
.contact(new Contact(swaggerProperties.getContact().getName(),
swaggerProperties.getContact().getUrl(),
swaggerProperties.getContact().getEmail()))
//版本号
.version(swaggerProperties.getVersion())
//描述
.description(swaggerProperties.getDescription())
.build();
}
//创建接口文档对象
private Docket createDocket(SwaggerProperties swaggerProperties) {
//API 基础信息
ApiInfo apiInfo = apiInfo(swaggerProperties);
// base-path处理
// 当没有配置任何path的时候，解析/**
if (swaggerProperties.getBasePath().isEmpty()) {
swaggerProperties.getBasePath().add("/**");
}
List> basePath = new ArrayList<>();
for (String path : swaggerProperties.getBasePath()) {
basePath.add(PathSelectors.ant(path));
}
// exclude-path处理
List> excludePath = new ArrayList<>();
for (String path : swaggerProperties.getExcludePath()) {
excludePath.add(PathSelectors.ant(path));
}
return new Docket(DocumentationType.SWAGGER_2)
.apiInfo(apiInfo)
.groupName(swaggerProperties.getGroup())
.select()
.apis(RequestHandlerSelectors.basePackage(swaggerProperties.getBasePackage()))
.paths(Predicates.and(Predicates.not(Predicates.or(excludePath)),Predicates.or(basePath)))
.build();
}
} 第五步：创建启动类SwaggerDemoApplication
package cn.itcast;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SwaggerDemoApplication {
public static void main(String[] args) {
SpringApplication.run(SwaggerDemoApplication.class,args);
}
}
第六步：创建application.yml文件
server:
port: 8080
pinda:
swagger:
enabled: true #是否启用swagger
docket:
user:
title: 用户模块
base-package: cn.itcast.controller.user
menu:
title: 菜单模块
base-package: cn.itcast.controller.menu第七步：执行启动类main方法启动项目，访问地址：http://localhost:8080/doc.html
拓展：
如果接口文档不分组，我们可以修改application.yml文件：
server:
port: 8080
pinda:
swagger:
enabled: true
title: 测试标题
description: 在线文档
version: 0.1
basePackage: cn.itcast.controller