2023最新SpringBoot导出PDF方式（模板方式）-Toy模板网

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<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.20</version>
        </dependency>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>html2pdf</artifactId>
            <version>4.0.3</version>
        </dependency>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8"/>
    <title>Title</title>
    <style>
        body{
            font-size: 15px;
        }
        .title{
            text-align: center;
        }
        .content{
            margin:0 auto;
            width: 400px;
        }
        .content .text{
            text-indent: 2em;
        }
        .content .datetime{
            text-align: right;
        }
    </style>
</head>
<body>
<div>
    <div class="view">
        <h2 class="title">自我介绍</h2>
        <div class="content">
            <p class="text">
                大家好，我叫${person.personName}，我今年${person.personAge}，我是个${person.personGender}，
                我的职业是${person.personVocation}，我目前住在${person.address}，我在性格方面${person.personalityDesc}。
            </p>
            <p class="datetime">${person.createTime}</p>
        </div>
    </div>
</div>
</body>
</html>

在准备一个PDFUtil的工具类
PDFUtil工具类

public class PdfUtil {
    @Autowired
    private Configuration configuration;
    /**
     * 获取模板内容
     * @param templateDirectory 模板文件夹
     * @param templateName      模板文件名
     * @param paramMap          模板参数
     * @return
     * @throws Exception
     */
    public static String getTemplateContent(String templateDirectory, String templateName, Map<String, Object> paramMap) throws Exception {
        Configuration configuration = new Configuration(Configuration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS);
        try {
            configuration.setDirectoryForTemplateLoading(new File(templateDirectory));
        } catch (Exception e) {
            System.out.println("-- exception --");
        }

        Writer out = new StringWriter();
        Template template = configuration.getTemplate(templateName,"UTF-8");
        template.process(paramMap, out);
        out.flush();
        out.close();
        return out.toString();
    }
    /**
     * HTML 转 PDF
     * @param content html内容
     * @param outPath           输出pdf路径
     * @return 是否创建成功
     */
    public static boolean html2Pdf(String content, String outPath) {
        try {
            ConverterProperties converterProperties = new ConverterProperties();
            converterProperties.setCharset("UTF-8");
            FontProvider fontProvider = new FontProvider();
            fontProvider.addSystemFonts();
            converterProperties.setFontProvider(fontProvider);
            HtmlConverter.convertToPdf(content, new FileOutputStream(outPath), converterProperties);
        } catch (Exception e) {
            log.error("生成模板内容失败,{}",e);
            return false;
        }
        return true;
    }
    /**
     * HTML 转 PDF
     * @param content html内容
     * @return PDF字节数组
     */
    public static byte[] html2Pdf(String content) {
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        try {
            ConverterProperties converterProperties = new ConverterProperties();
            converterProperties.setCharset("UTF-8");
            FontProvider fontProvider = new FontProvider();
            fontProvider.addSystemFonts();
            converterProperties.setFontProvider(fontProvider);
            HtmlConverter.convertToPdf(content,outputStream,converterProperties);
        } catch (Exception e) {
            log.error("生成 PDF 失败,{}",e);
        }
        return outputStream.toByteArray();
    }
}
Bean类
```java
@Data
public class PersonIntroduce {
    //名称
    private String personName ;
    //年龄
    private Integer personAge ;
    //性格描述
    private String personalityDesc;
    //性别
    private String personGender;
    //职业
    private String personVocation;
    //现居地址
    private String address;
    //创建时间
    private String createTime;
}

Controller层代码

@Controller
public class PersonIntroduceController {
    @Autowired
    private PersonIntroduceService personIntroduceService;	
    @GetMapping("/exPdf")
    @ResponseBody
    public void exPdfPersonIntroduce(HttpServletRequest request , HttpServletResponse response) throws TemplateException, IOException {
        PersonIntroduce personIntroduce = new PersonIntroduce();
        personIntroduce.setPersonName("小刘");
        personIntroduce.setAddress("北京朝阳区");
        personIntroduce.setPersonAge(24);
        personIntroduce.setPersonGender("男生");
        personIntroduce.setPersonalityDesc("其实我也不是很清楚");
        personIntroduce.setPersonVocation("Java后端开发");
        personIntroduceService.exPersonIntroduce(personIntroduce , request , response);
    }
}

Service业务层代码：
注意：建议使用这种方式，之前我在项目开发的过程中，使用了PdUtil.class.ClassLoader()这种方式去定位exPdf.html，在线下（开发环境）是可以使用的，但是部署到服务器的时候就出现了文件找不到的情况，因为上述这种方式他是使用的磁盘绝对路径查找的。使用freeMarkerConfigurer.getConfiguration().getTemplate(“exPdf.html”);来定位就不会出现这种问题。

@Service
public class PersonIntroduceServiceImpl implements PersonIntroduceService {
    @Autowired
    private FreeMarkerConfigurer freeMarkerConfigurer;
    /**
     * PDF导出类
     * @param personIntroduce
     */
    public void exPersonIntroduce(PersonIntroduce personIntroduce , HttpServletRequest  request, HttpServletResponse response) throws IOException, TemplateException {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
        Map<String, Object> paramMap = new HashMap<>();
        personIntroduce.setCreateTime(sdf.format(new Date()));
        paramMap.put("person" , personIntroduce);
        Writer out = new StringWriter();
        //获取模板地址
        Template template = freeMarkerConfigurer.getConfiguration().getTemplate("exPdf.html");
        template.process(paramMap, out);
        out.flush();
        out.close();
        String templateContent = out.toString();
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/pdf");
        String fileName =personIntroduce.getPersonName() + "-个人介绍-" + sdf.format(new Date());
        response.setHeader("Content-Disposition", "filename=" + new String(fileName.getBytes(), "iso8859-1"));

        byte[] resources = PdfUtil.html2Pdf(templateContent);
        ServletOutputStream outputStream = response.getOutputStream();
        outputStream.write(resources);
        outputStream.close();
    }
}