1.新建一个 springboot 项目 （勾选spring web）

2、添加Maven依赖

<!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger2 -->
<dependency>
   <groupId>io.springfox</groupId>
   <artifactId>springfox-swagger2</artifactId>
   <version>2.9.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger-ui -->
<dependency>
   <groupId>io.springfox</groupId>
   <artifactId>springfox-swagger-ui</artifactId>
   <version>2.9.2</version>
</dependency>

3、编写HelloController，测试确保运行成功！

4、要使用Swagger，我们需要编写一个配置类-SwaggerConfig来配置 Swagger

@Configuration //配置类
@EnableSwagger2// 开启Swagger2的自动配置
public class SwaggerConfig {  
}

5、访问测试 ：http://localhost:8080/swagger-ui.html ，可以看到swagger的界面；

配置Swagger

1、Swagger实例Bean是Docket，所以通过配置Docket实例来配置Swaggger。

 

 

 

package com.zhang.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
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.ArrayList;

@Configuration  //配置类
@EnableSwagger2    //开启swagger2
public class SwaggerConfig {

    @Bean
    public  Docket docket2(){
        return new Docket(DocumentationType.SWAGGER_2).groupName("李四");
    }


    //配置swagger的Docket的bean实例
    @Bean
    public Docket docket(){
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .groupName("张悦")
//                .enable(false)   是否启用swagger
                //下面三个是一套，不要在中间点 不可以将他们分开
                .select()
                 通过.select()方法，去配置扫描接口,RequestHandlerSelectors配置如何扫描接口
                .apis(RequestHandlerSelectors.basePackage("com.zhang"))
                //   .paths(PathSelectors.ant("/zhang/**"))  过滤什么路径
                .build();

    }

    //配置swagger信息=apiInfo
    private ApiInfo apiInfo(){
        //作者信息
        Contact Contact = new Contact("张悦", "https://blog.csdn.net/weixin_51867622?spm=1001.2101.3001.5343", "3391409848@qq.com");
        return new ApiInfo(
                "ZhangYue 的 SwaggerAPI文档",
                "nothing at all",
                "v1.0",
                "https://blog.csdn.net/weixin_51867622?spm=1001.2101.3001.5343",
                Contact,
                "Apache 2.0",
                "http://www.apache.org/licenses/LICENSE-2.0",
                new ArrayList());

    }

}

 配置Swagger开关  这里不细说 看原文链接  狂神说SpringBoot14：集成Swagger终极版 (qq.com)

配置API分组

 

@Bean
public Docket docket(Environment environment) {
   return new Docket(DocumentationType.SWAGGER_2).apiInfo(apiInfo())
      .groupName("hello") // 配置分组
       // 省略配置....
}

 

 换肤 看原文链接  狂神说SpringBoot14：集成Swagger终极版 (qq.com)

常见错误

如果是配置开启 swagger 后项目报错

2021-12-29 15:15:04 [main] ERROR org.springframework.boot.SpringApplication - Application run failed
org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException

 1、配置WebMvcConfigurer.java

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

/**
 * @author Andon
 * 2021/12/29
 */
@Configuration
public class WebMvcConfigurer extends WebMvcConfigurationSupport {

    /**
     * 发现如果继承了WebMvcConfigurationSupport，则在yml中配置的相关内容会失效。 需要重新指定静态资源
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**").addResourceLocations(
                "classpath:/static/");
        registry.addResourceHandler("swagger-ui.html", "doc.html").addResourceLocations(
                "classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations(
                "classpath:/META-INF/resources/webjars/");
        super.addResourceHandlers(registry);
    }

}

2、配置文件添加spring.mvc.pathmatch.matching-strategy=ant_path_matcher

spring:
  mvc:
    pathmatch:
      matching-strategy: ant_path_matcher

3、项目启动

4、swagger访问，http://localhost:8080/doc.html 或者 http://localhost:8080/swagger-ui.html

如果是书写实体类后莫名其妙报错，找不到在哪错了，去看看下面标注的地方 user是不是用的自己的