java实现在pdf文档上填充内容

需求：

在合同附件模板上填充内容，生成一个新的合同附件，并可以查看合同附件

思路：

首先在模板文档上设置文本域，根据文本域填充内容，使用itextpdf在pdf上填充内容

1.在pom.xml中加入以下依赖：

<dependency>
           <groupId>com.itextpdf</groupId>
           <artifactId>itextpdf</artifactId>
           <version>5.5.1</version>
       </dependency>
       <dependency>
           <groupId>com.itextpdf</groupId>
           <artifactId>itext-asian</artifactId>
           <version>5.2.0</version>
       </dependency>

2.在application.properties中配置文件模板路径和文件保存路径

conf.uploadContractAttachTemplatePath=D:\\wkgbErp\\upload\\ContractTemplatePath\\\u9644\u4EF6\u4E00 \u623F\u5C4B\u53CA\u79DF\u8D41\u4FE1\u606F\u8868.pdf
conf.saveUploadContractAttachPath=D:\\wkgbErp\\upload\\ContractTemplatePath\\contractAttach\\

3.创建一个service接口：

/**
* 生成合同附件
*/
@Override
public ErrorObject generateContractAttach(String contractId) {
ErrorObject error = new ErrorObject();
PdfReader reader;
FileOutputStream out;
ByteArrayOutputStream bos;
PdfStamper stamper;
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
if (StringUtils.isNotBlank(contractId)) {
TblContractPre entity = tblContractPreRepository.findByDeedsn(contractId);
TblIdentify identify = identifyService.findByUid(entity.getUid());
String fileName = contractId + ".pdf";
String newPDFPath = saveUploadContractAttachPath + fileName;
try {
out = new FileOutputStream(newPDFPath);
reader = new PdfReader(uploadContractAttachTemplatePath);// 读取pdf模板
bos = new ByteArrayOutputStream();
stamper = new PdfStamper(reader, bos);
AcroFields form = stamper.getAcroFields();
// java.util.Iterator<String> it = form.getFields().keySet().iterator();
// while (it.hasNext()) {
// String name = it.next().toString();
// // 填写内容部分
// form.setField(name, identify.getName());
// }
// BaseFont.createFont("STSongStd-Light", "UTF-8", false);
form.setField("liveName", identify.getName());// 租客姓名
if (entity.getDeedsnStart() != null) {
form.setField("deedsnStart", dateFormat.format(entity.getDeedsnStart()));// 合同开始时间
}
if (entity.getDeedsnEnd() != null) {
form.setField("deedsnEnd", dateFormat.format(entity.getDeedsnEnd()));// 合同结束时间
}
if (entity.getMonthNum() != null) {// 支付方式
if (entity.getMonthNum() == 1) {
form.setField("monthNum", "押二月付");
}
if (entity.getMonthNum() == 3) {
form.setField("monthNum", "押二季付");
}
if (entity.getMonthNum() == 6) {
form.setField("monthNum", "押二半年付");
}
if (entity.getMonthNum() == 12) {
form.setField("monthNum", "押二年付");
}
}
form.setField("roomsn", entity.getRoomsn());// 房源编号
if (entity.getRental() != null) {
form.setField("rental", entity.getRental().toString());// 租金
BigDecimal rental = entity.getRental();
BigDecimal deposit = rental.multiply(new BigDecimal(2));// 押金=租金*2
BigDecimal total = rental.multiply(new BigDecimal(12));// 总计
form.setField("total", total + "元");// 总计
form.setField("deposit", deposit.toString()); // 押金
}
form.setField("houseAddress", entity.getHouseName().replace(";", ""));// 产权地址
if (entity.getBuildArea() != null) {
form.setField("buildArea", entity.getBuildArea() + "平米");// 面积
}

// 填充租金支付明细
if (entity.getDeedsnStart() != null) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(entity.getDeedsnStart());
calendar.add(Calendar.DATE, -1);
Date date = calendar.getTime();
form.setField("deedsnStart1", dateFormat.format(entity.getDeedsnStart()));
form.setField("deedsnTime1", dateFormat.format(entity.getDeedsnStart()) + " / " + DateUtil.AddMonth(date, 1));

form.setField("deedsnStart2", DateUtil.AddMonth(entity.getDeedsnStart(), 1));
form.setField("deedsnTime2",
DateUtil.AddMonth(entity.getDeedsnStart(), 1) + " / " + DateUtil.AddMonth(date, 2));

form.setField("deedsnStart3", DateUtil.AddMonth(entity.getDeedsnStart(), 2));
form.setField("deedsnTime3",
DateUtil.AddMonth(entity.getDeedsnStart(), 2) + " / " + DateUtil.AddMonth(date, 3));

form.setField("deedsnStart4", DateUtil.AddMonth(entity.getDeedsnStart(), 3));
form.setField("deedsnTime4",
DateUtil.AddMonth(entity.getDeedsnStart(), 3) + " / " + DateUtil.AddMonth(date, 4));

form.setField("deedsnStart5", DateUtil.AddMonth(entity.getDeedsnStart(), 4));
form.setField("deedsnTime5",
DateUtil.AddMonth(entity.getDeedsnStart(), 4) + " / " + DateUtil.AddMonth(date, 5));

form.setField("deedsnStart6", DateUtil.AddMonth(entity.getDeedsnStart(), 5));
form.setField("deedsnTime6",
DateUtil.AddMonth(entity.getDeedsnStart(), 5) + " / " + DateUtil.AddMonth(date, 6));

form.setField("deedsnStart7", DateUtil.AddMonth(entity.getDeedsnStart(), 6));
form.setField("deedsnTime7",
DateUtil.AddMonth(entity.getDeedsnStart(), 6) + " / " + DateUtil.AddMonth(date, 7));

form.setField("deedsnStart8", DateUtil.AddMonth(entity.getDeedsnStart(), 7));
form.setField("deedsnTime8",
DateUtil.AddMonth(entity.getDeedsnStart(), 7) + " / " + DateUtil.AddMonth(date, 8));

form.setField("deedsnStart9", DateUtil.AddMonth(entity.getDeedsnStart(), 8));
form.setField("deedsnTime9",
DateUtil.AddMonth(entity.getDeedsnStart(), 8) + " / " + DateUtil.AddMonth(date, 9));

form.setField("deedsnStart10", DateUtil.AddMonth(entity.getDeedsnStart(), 9));
form.setField("deedsnTime10",
DateUtil.AddMonth(entity.getDeedsnStart(), 9) + " / " + DateUtil.AddMonth(date, 10));

form.setField("deedsnStart11", DateUtil.AddMonth(entity.getDeedsnStart(), 10));
form.setField("deedsnTime11",
DateUtil.AddMonth(entity.getDeedsnStart(), 10) + " / " + DateUtil.AddMonth(date, 11));

form.setField("deedsnStart12", DateUtil.AddMonth(entity.getDeedsnStart(), 11));
form.setField("deedsnTime12",
DateUtil.AddMonth(entity.getDeedsnStart(), 11) + " / " + DateUtil.AddMonth(date, 12));
}

if (entity.getSignType() != null) {
if (entity.getSignType() == 0) {
form.setField("signType1", "true");// 首次签约复选框选中
}
if (entity.getSignType() == 1) {
form.setField("signType2", "true");
}
}
if (entity.getDepositeType() != null) {
if (entity.getDepositeType() == 0) {
form.setField("d1", "true");// 首次签约押金复选框选中
}
if (entity.getDepositeType() == 1) {
form.setField("d2", "true");// 首次签约押金复选框选中
}
}
form.setField("c1", "true");// 身份证复选框选中

if (identify.getSex() != null) {
if (identify.getSex() == 0) {// 性别
form.setField("sex", "女");
}
if (identify.getSex() == 1) {
form.setField("sex", "男");
}
}
if (identify.getAge() != null) {
form.setField("age", identify.getAge().toString());// 年龄
}
form.setField("phone", identify.getPhoneNum());// 联系电话
form.setField("email", entity.getEmail());
if (StringUtils.isNotBlank(entity.getEmergencyName())) {// 紧急联系人
form.setField("emergencyName", entity.getEmergencyName());
}
if (StringUtils.isNotBlank(entity.getEmergencyPhone())) {// 紧急联系人电话
form.setField("emergencyPhone", entity.getEmergencyPhone());
}
form.setField("certificateNum", identify.getCertificateNum());// 身份证号码
if (StringUtils.isNotBlank(entity.getCompanyAddr())) {
form.setField("companyAddr", entity.getCompanyAddr());// 租客通讯地址
}
stamper.setFormFlattening(true);// 如果为false那么生成的PDF文件还能编辑，一定要设为true
stamper.close();
// Document doc = new Document();
// PdfCopy copy = new PdfCopy(doc, out);
// doc.open();
// PdfImportedPage importPage = copy.getImportedPage(new
// PdfReader(bos.toByteArray()), 1);
// copy.addPage(importPage);
// doc.close();
out.write(bos.toByteArray());
out.flush();
out.close();
bos.close();
} catch (FileNotFoundException e1) {
log.error("{}", e1);
} catch (IOException e2) {
log.error("{}", e2);
} catch (DocumentException e3) {
log.error("{}", e3);
}
// 保存附件文件名
entity.setFileName(fileName);
// tblContractPreRepository.save(entity);
save(entity);
}
return error;
}

4.单元测试

package com.szwoku.gbwk.web.service;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import cn.wkgb.AppConfiguration;
import cn.wkgb.api.service.TblContractPreService;
import cn.wkgb.common.framework.dto.ErrorObject;
import lombok.extern.slf4j.Slf4j;

@Slf4j
@RunWith(SpringRunner.class)
@SpringBootTest(classes = AppConfiguration.class)
public class TblContractPreServiceTest {

@Resource
private TblContractPreService tblContractPreService;

@Test
public void testGenerateContractAttach() {
ErrorObject error = tblContractPreService.generateContractAttach("PRE-HA180900079");
log.warn("error= {}", error);
}
}

5.查看合同接口

/**
* 查看合同附件
*
* @param fileName
* @param request
* @param response
* @throws Exception
*/
@RequestMapping(value = { "/viewPdf/{fileName:.+}" })
public ErrorObject viewPdf(@PathVariable String fileName, final HttpServletResponse request,
final HttpServletResponse response) throws Exception {
ErrorObject error = new ErrorObject();
String ext = StringUtils.substringAfterLast(fileName, ".");
String path = saveUploadContractAttachPath + fileName;
logger.debug(path);
File file = new File(path);
if (!file.exists()) {
return error;
}
response.reset(); // 非常重要
if ("pdf".equalsIgnoreCase(ext)) {
response.setContentType(PDF);
}
OutputStream out = response.getOutputStream();
IOUtils.write(FileUtils.readFileToByteArray(file), out);
return error;
}

6.页面

<input type="hidden" value="PRE-HA180900079.pdf" id="contract-btn-attach">
<a οnclick="sing_view_attach()" class="btn btn-warning radius ml-20 mr-20">查看合同附件</a>

function sing_view_attach(){
   var href=$("#contract-btn-attach").val();
   console.log(href);
   var url= '/api/upload/viewPdf/'+href;
   console.log(url);
   if(href ==''|| href == null){
       alert2('该在线合同附件链接不存在');
   }else{
       var index = layer.open({
       type : 2,
       title : '合同附件查看',
       content : url,
       area : ['90%', '90%'],
       shadeClose : false,
       shade : 0.8,
       cancel : function() {