需求说明

根据合同模板，将动态的合同标签，合同方以及合同签约时间等动态的生成PDF，供用户下载打印。

前期准备

安装 Adobe Acrobat DC
链接：https://pan.baidu.com/s/1xkIioIBDG4uLBGP20SZJEA
提取码：yn8g

Spring Boot 集成

添加依赖

        <dependency><groupId>com.itextpdf</groupId><artifactId>itextpdf</artifactId><version>5.5.9</version><scope>compile</scope></dependency><!--中文问题解决--><dependency><groupId>com.itextpdf</groupId><artifactId>itext-asian</artifactId><version>5.2.0</version></dependency>

构建工具类

public class PDFUtils {private static final Logger log = LoggerFactory.getLogger(PDFUtils.class);/*** 根据pdf模板输出流* @param templateFileName 模板文件名* @param resultMap 包含文件字段名和值的map* @return 生成的文件字节流*/public static ByteArrayOutputStream createPdfStream(String templateFileName,Map<String, String> resultMap){ByteArrayOutputStream ba = new ByteArrayOutputStream();PdfStamper stamp =null;PdfReader reader = null;try {reader = new PdfReader(templateFileName);stamp = new PdfStamper(reader, ba);//使用字体BaseFont bf = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);/* 获取模版中的字段 */AcroFields form = stamp.getAcroFields();//填充表单if (resultMap != null) {for (Map.Entry<String, String> entry : resultMap.entrySet()) {form.setFieldProperty(entry.getKey(), "textfont", bf, null);form.setField(entry.getKey(), entry.getValue()!=null?entry.getValue():"");}}//不能编辑stamp.setFormFlattening(true);} catch (IOException e) {log.error("文档构建I/O异常",e);} catch (DocumentException e) {log.error("文档构建异常",e);}finally {if(stamp!=null){try {stamp.close();} catch (DocumentException e) {log.error("流关闭错误",e);} catch (IOException e) {log.error("流关闭错误",e);}}if(reader!=null){reader.close();}}return ba;}
}

构建MultipartFile

方便之后上传OSS返回url

public UploadFileModel createUrl(String filePath, ByteArrayOutputStream byteArrayOutputStream) throws URISyntaxException {try{byte[] pdfBytes = byteArrayOutputStream.toByteArray();MultipartFile multipartFile = new MockMultipartFile("file",filePath,"application/pdf",pdfBytes);return uploadFileUtil.upload(multipartFile);} catch (Exception e) {log.error("创建Url时出错：" + e.getMessage());}return null;}

编辑PDF模板

Java代码设置对应form的key-value

pdf模板放在springboot 项目目录resources/static 目录下

 public String createContract(CreateContractRequest request) {HashMap<String, String> map = new HashMap<>();map.put("companyName",request.getCompanyName());map.put("phone",request.getPhone());UploadFileModel url = null;ByteArrayOutputStream pdfStream = PDFUtils.createPdfStream(UserApplication.class.getResource("/").getPath() + "static/contract.pdf", map);try {url = createUrl("合同.pdf", pdfStream);} catch (URISyntaxException e) {throw new RuntimeException(e);}return url.getUrl();}