使用 Swagger2 生成 HTML、PDF 静态文件

Swagger 是一个简单但功能强大的 API 表达工具，它开源在 Github 中。

swagger2markup

swagger2markup用来将我们手写的或自动生成的 swagger.yaml 或 swagger.json 转换成漂亮的 AsciiDoc 或 Markdown 格式文件。 然后再通过 asciidoctor-maven-plugin 将其转换为 HTML、PDF 格式文档看。

具体操作或者缺少的文件，可以通过 spring-swagger2markup-demo 下载。

引入依赖

<!--swagger2 依赖 -->
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger-ui</artifactId>
    <version>2.9.2</version>
</dependency>
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger2</artifactId>
    <version>2.9.2</version>
</dependency>
<dependency>
    <groupId>io.github.swagger2markup</groupId>
    <artifactId>swagger2markup</artifactId>
    <version>1.3.3</version>
    <scope>test</scope>
</dependency>

增加 UserDo 实体对象

@Data
@ApiModel(value = "user 对象 ", description = " 用户对象 user")
public class UserDo {

    @ApiModelProperty(value = " 必须是 2~5 个中文汉字 ", required = true)
    private String username;
    private String password;

    /**
     * 不加 example 时，会报：java.lang.NumberFormatException: For input string: ""
     * 原因是 example 默认是空字符串。在转换时，无法把空字符串转换成 int 类型。
     */
    @ApiModelProperty(value = " 年龄要求：18 < age < 60", example = "18")
    private int age;

}

增加 HelloController 测试

/**
 * Created with IntelliJ IDEA.
 * DateTime: 2020/5/15 11:10
 *
 * @author muycode
 */
@RestController
@RequestMapping("/hello")
@Api(value = "/hello", tags = "Test 控制层 ")
public class HelloController {

    @GetMapping("/sayHello1")
    @ApiOperation(value = " 测试无参 ", notes = " 可以无参调用 ")
    @ApiResponses(value = {
            @ApiResponse(code = 1001, message = " 通用异常 "),
            @ApiResponse(code = 1002, message = " 没有找到要查询的数据 ")
    })
    public String sayHello1(){
        return "sayHello1";
    }

    @GetMapping("/sayHello2")
    @ApiOperation(value = " 测试 String 类型参数 ", notes = " 当 rid 不为 null 时，查询该实体。为 null 时，返回 null")
    @ApiResponses(value = {
            @ApiResponse(code = 1001, message = " 通用异常 "),
            @ApiResponse(code = 1002, message = " 没有找到要查询的数据 "),
            @ApiResponse(code = 1003, message = "rid 传递错误 "),
            @ApiResponse(code = 0, message = " 根据 rid 返回对应的对象 ")
    })
    @ApiIgnore // 可以过滤不想要加入的 Controller 和方法
    public Object sayHello2(@ApiParam(value = "rid 是必须的 ", required = true) String rid) {
        return "sayHello2";
    }

    @GetMapping("/sayHello3")
    @ApiOperation(value = " 测试对象类型参数 ", notes = " 根据传递过来的对象，检查该对象里面的数据 ", response = UserDo.class)
    @ApiResponses(value = {
            @ApiResponse(code = 1001, message = " 通用异常 "),
            @ApiResponse(code = 1002, message = " 没有找到要查询的数据 "),
            @ApiResponse(code = 1003, message = "rid 传递错误 "),
            @ApiResponse(code = 1004, message = " 对象传递错误 "),
            @ApiResponse(code = 0, message = " 根据 rid 返回对应的对象 ")
    })
    public Object sayHello3(
            @ApiParam(value = " 用户的实体对象 ") UserDo userDo) {
        return "sayHello3";
    }

    @ApiOperation(value = " 测试对象、String 类型参数 ", notes = " 根据传递过来的对象和 rid，检查该对象里面的数据是否和 rid 匹配 ", response = UserDo.class)
    @ApiResponses(value = {
            @ApiResponse(code = 1001, message = " 通用异常 "),
            @ApiResponse(code = 1002, message = " 没有找到要查询的数据 "),
            @ApiResponse(code = 1003, message = "rid 传递错误 "),
            @ApiResponse(code = 0, message = " 根据 rid 返回对应的对象 ")
    })
    @GetMapping("/sayHello4")
    public Object sayHello4(UserDo userDo, String rid) {
        return "sayHello4";
    }
}

增加 Swagger 配置文件

com.muycode.bsservice.config.swagger

/**
 * Created with IntelliJ IDEA.
 * DateTime: 2020/6/2 10:00
 * Swagger 配置
 *
 * @author muycode
 */
@Configuration
@EnableSwagger2
public class SwaggerConfig {

    @Bean
    public Docket sysApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .apiInfo(apiInfo())
                .select()
                .apis(RequestHandlerSelectors.basePackage("com.muycode"))
                .paths(PathSelectors.any())
                .build().globalOperationParameters(parameter());
    }

    @Bean
    public ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                .title(" 用户中心微服务接口 ")
                .description(" 用户中心微服务的所有接口 API")
                .termsOfServiceUrl("")
                .version("1.0.0")
                .build();
    }

    private List<Parameter> parameter() {
        List<Parameter> params = new ArrayList<>();
        params.add(new ParameterBuilder().name("Authorization")
                .description("Authorization Bearer token")
                .modelRef(new ModelRef("string"))
                .parameterType("header")
                .required(false).build());
        return params;
    }
}

此时启动服务，通过 http://127.0.0.1:8761/swagger-ui.html 可查看 API 接口文档。

生成静态文件

增加 index.adoc 文件

src/docs/asciidoc/index.adoc

include::{generated}/overview.adoc[]
include::{generated}/security.adoc[]
include::{generated}/paths.adoc[]
include::{generated}/definitions.adoc[]

配置 asciidoctor-maven-plugin 插件

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>11</java.version>

    <swagger2markup.version>1.3.1</swagger2markup.version>
    <swagger2markup.plugin.version>1.3.3</swagger2markup.plugin.version>
    <swagger2markup.extension.version>1.3.1</swagger2markup.extension.version>

    <asciidoctorj.version>1.5.5</asciidoctorj.version>
    <asciidoctorj.pdf.version>1.5.0-alpha.15</asciidoctorj.pdf.version>
    <jruby.version>9.1.8.0</jruby.version>

    <swagger.input>${project.basedir}/src/docs/swagger/swagger_petstore.yaml</swagger.input>
    <asciidoctor.input.directory>${project.basedir}/src/docs/asciidoc</asciidoctor.input.directory>
    <generated.asciidoc.directory>${project.build.directory}/asciidoc</generated.asciidoc.directory>
    <asciidoctor.html.output.directory>${project.build.directory}/asciidoc/html</asciidoctor.html.output.directory>
    <asciidoctor.pdf.output.directory>${project.build.directory}/asciidoc/pdf</asciidoctor.pdf.output.directory>
</properties>

<pluginRepositories>
    <pluginRepository>
        <id>jcenter-snapshots</id>
        <name>jcenter</name>
        <url>http://oss.jfrog.org/artifactory/oss-snapshot-local/</url>
    </pluginRepository>
    <pluginRepository>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
        <id>jcenter-releases</id>
        <name>jcenter</name>
        <url>http://jcenter.bintray.com</url>
    </pluginRepository>
</pluginRepositories>

<build>
    <plugins>
        <plugin>
            <groupId>org.asciidoctor</groupId>
            <artifactId>asciidoctor-maven-plugin</artifactId>
            <version>1.5.5</version>
            <!-- 包括用于生成 PDF 的 Asciidoctor PDF -->
            <dependencies>
                <dependency>
                    <groupId>org.asciidoctor</groupId>
                    <artifactId>asciidoctorj-pdf</artifactId>
                    <version>${asciidoctorj.pdf.version}</version>
                </dependency>
                <!-- 注释此部分以使用插件提供的默认 jruby 工件 -->
                <dependency>
                    <groupId>org.jruby</groupId>
                    <artifactId>jruby-complete</artifactId>
                    <version>${jruby.version}</version>
                </dependency>
                <!-- 注释此部分以使用插件提供的默认 AsciidoctorJ 工件 -->
                <dependency>
                    <groupId>org.asciidoctor</groupId>
                    <artifactId>asciidoctorj</artifactId>
                    <version>${asciidoctorj.version}</version>
                </dependency>
            </dependencies>
            <!-- 配置通用文档生成设置 -->
            <configuration>
                <sourceDirectory>${asciidoctor.input.directory}</sourceDirectory>
                <sourceDocumentName>index.adoc</sourceDocumentName>
                <attributes>
                    <doctype>book</doctype>
                    <toc>left</toc>
                    <toclevels>3</toclevels>
                    <generated>${generated.asciidoc.directory}</generated>
                </attributes>
            </configuration>
            <!-- 因为每个执行只能处理一个后端，所以运行为每个期望的输出类型单独执行 -->
            <executions>
                <execution>
                    <id>output-html</id>
                    <phase>generate-resources</phase>
                    <goals>
                        <goal>process-asciidoc</goal>
                    </goals>
                    <configuration>
                        <backend>html5</backend>
                        <outputDirectory>${asciidoctor.html.output.directory}</outputDirectory>
                    </configuration>
                </execution>

                <execution>
                    <id>output-pdf</id>
                    <phase>generate-resources</phase>
                    <goals>
                        <goal>process-asciidoc</goal>
                    </goals>
                    <configuration>
                        <backend>pdf</backend>
                        <outputDirectory>${asciidoctor.pdf.output.directory}</outputDirectory>

                        <!-- 以下配置解决生成 pdf 中文乱码
                             需要先下载好字体和主题：
                             https://github.com/chloerei/asciidoctor-pdf-cjk-kai_gen_gothic/releases/tag/v0.1.0-fonts
                             (RobotoMono 开头和 KaiGenGothicCN 开头的字体文件 8 个和 theme 文件（Source code (zip))
                             1、把下载的 8 个字体文件复制到 fonts 目录下
                             2、data\themes\ 下的 cn-theme.yml 复制到 themes 目录 -->
                        <sourceHighlighter>coderay</sourceHighlighter>
                        <doctype>book</doctype>
                        <attributes>
                            <toc>left</toc>
                            <toclevels>3</toclevels>
                            <generated>${generated.asciidoc.directory}</generated>
                            <pdf-fontsdir>fonts</pdf-fontsdir>
                            <pdf-stylesdir>themes</pdf-stylesdir>
                            <pdf-style>cn</pdf-style>
                        </attributes>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

增加 Test 类，用来生成 adoc 文件

package com.muycode.test;

import com.muycode.bsservice.BsServiceApplication;
import io.github.swagger2markup.Swagger2MarkupConfig;
import io.github.swagger2markup.Swagger2MarkupConverter;
import io.github.swagger2markup.builder.Swagger2MarkupConfigBuilder;
import io.github.swagger2markup.markup.builder.MarkupLanguage;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.net.URL;
import java.nio.file.Path;
import java.nio.file.Paths;

/**
 * Created with IntelliJ IDEA.
 * DateTime: 2020/6/2 18:16
 * 生成 adoc 文件，为后续生成静态文件做准备
 * mvn process-resources
 *
 * @author muycode
 */
@RunWith(SpringRunner.class)
@SpringBootTest(classes = BsServiceApplication.class)
public class DemoApplicationTests {

    /**
     * 执行完该测试方法，需要再执行
     * mvn process-resources
     *
     * @throws Exception
     */
    @Test
    public void generateAsciiDocs() throws Exception {

        URL remoteSwaggerFile = new URL("http://127.0.0.1:8761/v2/api-docs");
        Path outputDirectory = Paths.get("target/asciidoc");

        // 输出 Ascii 格式
        Swagger2MarkupConfig config = new Swagger2MarkupConfigBuilder()
                .withMarkupLanguage(MarkupLanguage.ASCIIDOC)
                .build();

        Swagger2MarkupConverter.from(remoteSwaggerFile)
                .withConfig(config)
                .build()
                .toFolder(outputDirectory);
    }
}

生成文件

• 启动服务
• 执行 Test 文件
• 执行 mvn process-resources 会在 target\asciidoc 文件夹生成静态文件。

---

参考文章

Swagger2Markup Documentation

使用 Swagger 生成 RESTful API 文档