使用swagger-ui的过程中，swagger页面调用的时候会统一在header里面加入输入token参数的位置

1. 在pom中加入依赖

 <properties>
        <maven.compile.source>1.8</maven.compile.source>
        <maven.compile.target>1.8</maven.compile.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <swagger.version>2.7.0</swagger.version>
    </properties>
        <!-- swagger -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>${swagger.version}</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>${swagger.version}</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-bean-validators</artifactId>
            <version>${swagger.version}</version>
        </dependency>

3.编写API配置类放置在Application类的同级或子包下

import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import zut.edu.ding.utils.JwtTokenUtils;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.ParameterBuilder;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.schema.ModelRef;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Contact;
import springfox.documentation.service.Parameter;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.ArrayList;
import java.util.List;

/**
 * @author lism
 * @date 2018/08/12 10:52
 */
@Configuration
@EnableSwagger2
public class Swagger2Config {
    /**
     * Every Docket bean is picked up by the swagger-mvc framework - allowing for multiple
     * swagger groups i.e. same code base multiple swagger resource listings.
     */
    @Bean
    public Docket customDocket(){
        ParameterBuilder ticketPar = new ParameterBuilder();
        List<Parameter> pars = new ArrayList<Parameter>();
        ticketPar.name("Authorization").description("认证token")
                .modelRef(new ModelRef("string")).parameterType("header")
                .required(false).build(); //header中的ticket参数非必填，传空也可以
        pars.add(ticketPar.build());    //根据每个方法名也知道当前方法在设置什么参数

        return new Docket(DocumentationType.SWAGGER_2)
                .select()
                .apis(RequestHandlerSelectors.any())
                .build()
                .globalOperationParameters(pars)
                .apiInfo(apiInfo());
    }

    //构建 api文档的详细信息函数,注意这里的注解引用的是哪个
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                //页面标题
                .title("demo")
                //创建人
                .contact(new Contact("demo", "", ""))
                //版本号
                .version("1.0")
                //描述
                .description("demo REST API")
                .build();
    }
}

在Spring Security下使用

如果你项目配置了Spring Security的话swagger-ui是会被拦截到的，需要再Spring Security配置中去掉拦截

/**
 * @author lism
 * @date  2018/9/11
 */
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    public void configure(WebSecurity web) throws Exception {
        //allow Swagger URL to be accessed without authentication
        web.ignoring().antMatchers("/v2/api-docs",//swagger api json
                "/swagger-resources/configuration/ui",//用来获取支持的动作
                "/swagger-resources",//用来获取api-docs的URI
                "/swagger-resources/configuration/security",//安全选项
                "/swagger-ui.html");
    }
}

效果：可以看到所有的api都有一个输入Authorization的地方

swagger.png

3.更好的方案

虽然上面这种方式能解决问题，但是不好的地方是每次请求都要输入请求头，很麻烦，下面给出一种更简便的方式

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.ApiKey;
import springfox.documentation.service.AuthorizationScope;
import springfox.documentation.service.SecurityReference;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spi.service.contexts.SecurityContext;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.List;

import static com.google.common.collect.Lists.newArrayList;

/**
 * @author lism
 */
@Configuration
@EnableSwagger2
public class Swagger2Config {
    @Bean
    public Docket api() {
        return new Docket(DocumentationType.SWAGGER_2).
                useDefaultResponseMessages(false)
                .select()
                .apis(RequestHandlerSelectors.any())
                .paths(PathSelectors.regex("^(?!auth).*$"))
                .build()
                .securitySchemes(securitySchemes())
                .securityContexts(securityContexts())
                ;
    }
    private List<ApiKey> securitySchemes() {
        return newArrayList(
                new ApiKey("Authorization", "Authorization", "header"));
    }
    private List<SecurityContext> securityContexts() {
        return newArrayList(
                SecurityContext.builder()
                        .securityReferences(defaultAuth())
                        .forPaths(PathSelectors.regex("^(?!auth).*$"))
                        .build()
        );
    }
    List<SecurityReference> defaultAuth() {
        AuthorizationScope authorizationScope = new AuthorizationScope("global", "accessEverything");
        AuthorizationScope[] authorizationScopes = new AuthorizationScope[1];
        authorizationScopes[0] = authorizationScope;
        return newArrayList(
                new SecurityReference("Authorization", authorizationScopes));
    }
}

效果：配置完之后点击右上角的Authorize，弹出认证窗口之后输入请求token，这样之后的每次请求的请求头都会带有token认证信息

swagger2.png

swagger2各种认证方式详细参考：https://swagger.io/docs/specification/authentication/bearer-authentication/