Springboot2整合knife4j過程解析

更新時(shí)間：2020年03月11日 11:37:34 作者：我太難了008

這篇文章主要介紹了Springboot2整合knife4j過程解析,文中通過示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值,需要的朋友可以參考下

knife4j官網(wǎng)：https://doc.xiaominfo.com/guide/useful.html

這玩藝就swagger的升級(jí)版,但是用起來比swagger方便多了，至少不會(huì)出現(xiàn)莫名的版本兼容問題

下面記錄一個(gè)配置示例

1.代碼結(jié)構(gòu)

2.pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.5.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>
  <groupId>com.example</groupId>
  <artifactId>knife4j-demo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>knife4j-demo</name>
  <description>Demo project for Spring Boot</description>

  <properties>
    <java.version>1.8</java.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
      <exclusions>
        <exclusion>
          <groupId>org.junit.vintage</groupId>
          <artifactId>junit-vintage-engine</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>com.github.xiaoymin</groupId>
      <artifactId>knife4j-spring-boot-starter</artifactId>
      <!--在引用時(shí)請(qǐng)?jiān)趍aven中央倉庫搜索最新版本號(hào)-->
      <version>2.0.2</version>
    </dependency>
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.58</version>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.10</version>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>

</project>

3.配置類

package com.example.knife4j.demo.config;

import com.github.xiaoymin.knife4j.spring.annotations.EnableKnife4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import springfox.bean.validators.configuration.BeanValidatorPluginsConfiguration;
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;

@Configuration
@EnableSwagger2
@EnableKnife4j
@Import(BeanValidatorPluginsConfiguration.class)
public class SwaggerConfiguration {
 

  @Bean(value = "defaultApi2")
  public Docket defaultApi2() {
    Docket docket=new Docket(DocumentationType.SWAGGER_2)
        .apiInfo(apiInfo())
        //分組名稱
        .groupName("2.X版本")
        .select()
        //這里指定Controller掃描包路徑(項(xiàng)目路徑也行)
        .apis(RequestHandlerSelectors.basePackage("com.example.knife4j.demo"))
        .paths(PathSelectors.any())
        .build();
    return docket;
  }
  private ApiInfo apiInfo() {
    return new ApiInfoBuilder()
        .title("不重要")
        .description("測(cè)試名稱不重要")
        .termsOfServiceUrl("http://localhost:88888/")
        .contact("10086@mail.com")
        .version("1.0")
        .build();
  }
}

4.模型bean

package com.example.knife4j.demo.beans;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;

/**
 * 創(chuàng)建時(shí)間: 23:09 2018/9/19
 * 修改時(shí)間:
 * 編碼人員: ZhengQf
 * 版  本: 0.0.1
 * 功能描述:
 */
@ApiModel(value = "用戶模型")
public class UserEntity {
  @ApiModelProperty(value="id" ,required= true,example = "123")
  private Integer id;
  @ApiModelProperty(value="用戶姓名" ,required=true,example = "鄭欽鋒")
  private String name;


  public Integer getId() {
    return id;
  }

  public void setId(Integer id) {
    this.id = id;
  }

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  @Override
  public String toString() {
    return "DemoDoctor [id=" + id + ", name=" + name + "]";
  }

}

5.兩個(gè)接口controller

package com.example.knife4j.demo.controller;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@Api(value = "IndexController測(cè)試接口")
@RestController
public class IndexController {
  @ApiOperation(value = "測(cè)試index接口", nickname = "測(cè)試IndexController的index接口")
  @GetMapping("/index")
  public String index() {
    return "測(cè)試IndexController的index接口...";
  }

}

package com.example.knife4j.demo.controller;

import com.example.knife4j.demo.beans.UserEntity;
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.*;

@Api(value = "用戶接口")
@RestController
public class UserController {


  @ApiOperation(value = "獲取用戶信息接口", nickname = "根據(jù)用戶ID獲取用戶相關(guān)信息")
  @ApiImplicitParam(name = "id", value = "用戶ID", required = true, dataType = "int")
  @PostMapping("/postMember")
  public UserEntity postMember(@RequestParam Integer id) {
    UserEntity userEntity = new UserEntity();
    userEntity.setId(id);
    userEntity.setName("admin");
    return userEntity;
  }


  @ApiOperation(value = "添加用戶", nickname = "添加用戶接口1", notes = "入?yún)⑹菑?fù)雜對(duì)象", produces = "application/json")
  @PostMapping("/postUser")
  @ResponseBody
  @ApiImplicitParam(paramType = "query", name = "userId", value = "用戶id", required = true, dataType = "int")
  public UserEntity postUser(@RequestBody UserEntity user, @RequestParam("userId") int userId) { // 這里用包裝類竟然報(bào)錯(cuò)
    if (user.getId() == userId) {
      return user;
    }
    return new UserEntity();
  }


  @ApiOperation(value = "添加用戶", nickname = "添加用戶接口2", notes = "入?yún)⑹呛?jiǎn)單對(duì)象", produces = "application/json")
  @PostMapping("/addUser")
  @ResponseBody
  @ApiImplicitParams({
      @ApiImplicitParam(paramType = "query", name = "userName", value = "用戶姓名", required = true, dataType = "String"),
      @ApiImplicitParam(paramType = "query", name = "id", value = "用戶id", required = true, dataType = "int")})
  public UserEntity addUser(String userName, int id) {
    UserEntity userEntity = new UserEntity();
    userEntity.setName(userName);
    userEntity.setId(id);
    return userEntity;
  }

}

6.srpingboot項(xiàng)目啟動(dòng)類

package com.example.knife4j.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import springfox.documentation.spring.web.SpringfoxWebMvcConfiguration;

@ConditionalOnClass(SpringfoxWebMvcConfiguration.class)
@SpringBootApplication
public class Knife4jDemoApplication implements WebMvcConfigurer {

  public static void main(String[] args) {
    SpringApplication.run(Knife4jDemoApplication.class, args);
  }
  @Override
  public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("doc.html").addResourceLocations("classpath:/META-INF/resources/");
    registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
  }
}

這樣簡(jiǎn)單一配置，就ok了，瀏覽器訪問：http://127.0.0.1:8080/doc.html

不過，在項(xiàng)目中我使用了ResponseBodyAdvice接口對(duì)項(xiàng)目接口響應(yīng)內(nèi)容做統(tǒng)一處理，然后使用knife4j就出問題了。

ResponseBodyAdvice接口實(shí)現(xiàn)如下：

import org.springframework.context.annotation.Configuration;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * 自定義advise ，對(duì)restful請(qǐng)求響應(yīng)體進(jìn)行統(tǒng)一規(guī)范
 */
@EnableWebMvc
@Configuration
@RestControllerAdvice
public class ResponseAdvise implements ResponseBodyAdvice<Object> {
  @Override
  public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
    return true;
  }

  @Override
  public Object beforeBodyWrite(Object object, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {

    if (object instanceof ResponseData) {
      return object;
    }
    return ResponseData.of().setData(object);
  }
}

請(qǐng)求報(bào)錯(cuò)

而且后臺(tái)還說找不到映射路徑

2020-03-10 23:31:01.533 WARN 7940 --- [nio-8080-exec-1] o.s.web.servlet.PageNotFound : No mapping for GET /service-worker.js
2020-03-10 23:31:01.560 WARN 7940 --- [nio-8080-exec-4] o.s.web.servlet.PageNotFound : No mapping for GET /favicon.ico
2020-03-10 23:31:14.468 WARN 7940 --- [nio-8080-exec-8] o.s.web.servlet.PageNotFound : No mapping for GET /service-worker.js

然后，我在ResponseAdvise#beforeBodyWrite方法中打上斷點(diǎn)，發(fā)現(xiàn)我將swagger的請(qǐng)求內(nèi)容進(jìn)行了修改，以至于報(bào)了404。

最后在ResponseAdvise類上聲明只對(duì)本項(xiàng)目的響應(yīng)體內(nèi)容進(jìn)行統(tǒng)一處理

@RestControllerAdvice(basePackages = "com.example.knife4j.demo")

這樣，就完全ok!

以上就是本文的全部內(nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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