1.需要先准备PDF的模板，使用工具Adobe Acrobat ，设置表单，添加区域框，为每个框设置名字。以下就是我准备的模板。

2.项目中引入要是用的依赖。写在pom.xml中，更新maven

       <dependency>
			<groupId>com.itextpdf</groupId>
			<artifactId>itextpdf</artifactId>
			<version>5.5.13</version>
		</dependency>
		<dependency>
			<groupId>com.itextpdf</groupId>
			<artifactId>itext-asian</artifactId>
			<version>5.2.0</version>
		</dependency>

3.代码。

   // 在自己的业务区域内增加以下代码
    Map<String, Object> params = new HashMap<>();
    //map的key就是你自己在模板中设置的名称，value是你自己的值
    params.put("name",psomCustomerInfo.getName());
    params.put("user",psomNicheInfo.getListCustomer().get(0).getName());
    params.put("tele",psomNicheInfo.getListCustomer().get(0).getTele());
    params.put("email",psomCustomerInfo.getEmail());
    params.put("addr",psomCustomerInfo.getAddress());
    params.put("item",psomNicheInfo.getNicheName());
  
    // 生成新的文件字符串
    String filePath = StringUtils.getUUID32() + ".pdf";
    //条形码的名称
    String erwPath = "D://upload.jpg";
   //生成PDF，filePath是新生成文件的名字，erwPath是图片的位置
   test(params,filePath,erwPath);

下面会沾出生成PDF的代码

  public static int test(Map map, String filePath,String erwPath) throws IOException, DocumentException {
        //上传目录地址
        File directory = new File("");// 参数为空
        String courseFile = directory.getCanonicalPath();
        //定位到项目的路径
        String uploadDir = courseFile + "\\" + "src\\main\\resources\\static\\upload";
//
//        //这是我自己的测试路径，即模板pdf的路径
        String pdfPath = uploadDir + "\\"+ "bjd.pdf";
    
        PdfReader pr = new PdfReader(pdfPath);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        //生成的pdf目标文件
        PdfStamper ps = new PdfStamper(pr, bos);
        //?
        PdfContentByte under = ps.getUnderContent(1);
        //字体
        //BaseFont bf = BaseFont.createFont("c:\\windows\\fonts\\SIMFANG.TTF", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
        ArrayList<BaseFont> list = new ArrayList<BaseFont>();
        //list.add(bf);
        AcroFields fields = ps.getAcroFields();
        //fields.setSubstitutionFonts(list);
        //插入图片

        fields.addSubstitutionFont(BaseFont.createFont("STSong-Light",
                "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED));

        // 通过域名获取所在页和坐标，左下角为起点
        int pageNo = fields.getFieldPositions("erw").get(0).page;
        Rectangle signRect = fields.getFieldPositions("erw").get(0).position;
        float x = signRect.getLeft();
        float y = signRect.getBottom();
        // 读图片,图片存储位置
        Image image = Image.getInstance(erwPath);
        // 获取操作的页面
        PdfContentByte undere = ps.getOverContent(pageNo);
        // 根据域的大小缩放图片
        image.scaleToFit(signRect.getWidth(), signRect.getHeight());
        // 添加图片
        image.setAbsolutePosition(x, y);
        undere.addImage(image);
        //添加图片的代码结束

        fillData(fields, map);
        //设置属性生成文档
        ps.setFormFlattening(true);
        ps.close();
        //生成的pdf的文件路径
        String resultPath = uploadDir +"\\" +filePath;
        try {
            OutputStream os = new FileOutputStream(resultPath);
            os.write(bos.toByteArray());
            os.flush();
            os.close();
            bos.close();
        } catch (FileNotFoundException e1) {
            //e1.getMessage()+"系统找不到指定的文件";
            return 0;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return 1;
    }

 public static void fillData(AcroFields fields, Map map) throws IOException, DocumentException {
        System.out.println("come fillData");
        //将map中的数据填充至fields中
        for (Object key : map.keySet()) {
            fields.setField(key.toString(), map.get(key).toString());
        }
    }

以上就是根据模板生成PDF的方法，参数根据自己的实际逻辑进行修改就可以。

一、如何制作pdf模板

1.首先创建template.doc

2.根据doc文件制作pdf模板

3.将doc文件输出为pdf

　　文件->输出为pdf

4.输出的pdf文件

5.使用Adobe Acrobat DC打开template.pdf

6.填充文字及创作表单

      创作表单->添加“文本”域

　  创作表单->编辑“表格”

*填充的字段名（比如对象Table的属性为name,这里名称后面一列的单元格填充name）

7.模板制作完毕

二、java生成pdf文件

1.java代码

PdfFileBlh.java:

@SuppressWarnings("unchecked")
public void exportPdfFile(HttpServletRequest request, HttpServletResponse response) throws IOException {
		//1.获取数据 
//		String jsonString = getRequestJsonString(request);
		String jsonString = request.getParameter("jsonString");
		/*String jsonString = "{\r\n" + 
				"  \"hospitalId\":\"14064\",\r\n" + 
				"  \"hospitalName\":\"揭阳市人民医院\",\r\n" + 
				"  \"name\":\"周虎\",\r\n" + 
				"  \"gender\":\"男\",\r\n" + 
				"  \"age\":\"26岁\",\r\n" + 
				"  \"patNo\":\"0001278568\",\r\n" + 
				"  \"clinic\":\"全科医学科简易门诊\",\r\n" + 
				"  \"bedNo\":\"16床\",\r\n" + 
				"  \"specimen\":\"咽拭子\",\r\n" + 
				"  \"repNo\":\"110254767\",\r\n" + 
				"  \"serialNo\":\"0\",\r\n" + 
				"  \"doctor\":\"核酸检测号\",\r\n" + 
				"  \"applicationTime\":\"2021-02-18 15:17\",\r\n" + 
				"  \"advName\":\"新型冠状病毒核酸RNA检测(自费)\",\r\n" + 
				"  \"idType\":\"身份证\",\r\n" + 
				"  \"idNo\":\"EC3263698\",\r\n" + 
				"  \"dateOfCollection\":\"2021-02-18 15:30\",\r\n" + 
				"  \"dateOfReceipt\":\"2021-02-19 11:13\",\r\n" + 
				"  \"specimenCollector\":\"黄敏华\",\r\n" + 
				"  \"specimenReceiver\":\"钟乔华\",\r\n" + 
				"  \"dateOfInspection\":\"2021-02-19 11:15\",\r\n" + 
				"  \"dateOfReport\":\"2021-02-19 11:15\",\r\n" + 
				"  \"reportedBy\":\"陈舒兰\",\r\n" + 
				"  \"inspectedBy\":\"钟乔华\",\r\n" + 
				"  \"resultList\":[\r\n" + 
				"	{\r\n" + 
				"		\"testItems\":\"2019新型冠状病毒核酸检测\",\r\n" + 
				"		\"result\":\"阴性(-)\",\r\n" + 
				"		\"refRange\":\"阴性(-)\",\r\n" + 
				"		\"method\":\"RT-PCR\"\r\n" + 
				"	},\r\n" + 
				"	{\r\n" + 
				"		\"testItems\":\"Nucleic Acid Test For SARA-Cov-2\",\r\n" + 
				"		\"result\":\"Negative(-)\",\r\n" + 
				"		\"refRange\":\"Negative(-)\",\r\n" + 
				"		\"method\":\"RT-PCR\"\r\n" + 
				"	},\r\n" + 
				"	{\r\n" + 
				"		\"testItems\":\"2019-nCov ORFlab基因\",\r\n" + 
				"		\"result\":\"阴性Negative(-)\",\r\n" + 
				"		\"refRange\":\"阴性Negative(-)\",\r\n" + 
				"		\"method\":\"RT-PCR\"\r\n" + 
				"	},\r\n" + 
				"	{\r\n" + 
				"		\"testItems\":\"2019-nCov N基因\",\r\n" + 
				"		\"result\":\"阴性Negative(-)\",\r\n" + 
				"		\"refRange\":\"阴性Negative(-)\",\r\n" + 
				"		\"method\":\"RT-PCR\"\r\n" + 
				"	}\r\n" + 
				"  ]\r\n" + 
				"}";*/
		System.out.println("======jsonString======"+jsonString);
		if(StringUtils.isNotBlank(jsonString)) {
			//2.处理数据
			Map<String, Object> data = JsonUtils.toObject(jsonString, Map.class);
			//3.根据医院Id获取pdf模板文件
			String hospitalId = (String) data.get("hospitalId");
			String hospitalName = (String) data.get("hospitalName");
			String templatePath = request.getSession().getServletContext().getRealPath("/WEB-INF/classes/template/template_" + hospitalId + ".pdf");
			String fontPath = request.getSession().getServletContext().getRealPath("/WEB-INF/classes/template/simsun.ttc");
			System.out.println("======templatePath======"+templatePath);
			
			//4.设置响应头信息
			response.setContentType("multipart/form-data");
			response.setHeader("Content-Disposition","attachment;fileName="+new String((hospitalName + "检验报告单_").getBytes("GBK"), "ISO-8859-1") + DateUtils.formatDate(new Date(), "yyyyMMddHHmmss") + ".pdf");

			//5.指定解析器
			ServletOutputStream os = null;
			PdfStamper ps = null;
			PdfReader reader = null;
			Document doc = null;
			try {
				os = response.getOutputStream();
				// 6.读入pdf表单
				reader = new PdfReader(templatePath);
				// 7.根据表单生成一个新的pdf
				ps = new PdfStamper(reader, os);
				doc = new Document();
				// 8.获取pdf表单
				AcroFields form = ps.getAcroFields();
				// 9.给表单添加中文字体 。不设置的话，中文可能无法显示
				BaseFont bf = BaseFont.createFont(fontPath+",1", BaseFont.IDENTITY_H,BaseFont.NOT_EMBEDDED);
				form.addSubstitutionFont(bf);
				// 10.获取到明细
				List<Map<String,Object>> resultList = (List<Map<String, Object>>) data.get("resultList");
				data.remove("resultList");
				// 11.遍历data 给pdf表单表格赋值
				for (String key : data.keySet()) {
					String value = (String) data.get(key);
					form.setField(key, value);
				}
				
				// 12.处理检验明细
				if(resultList!=null && resultList.size()>0) {
					String testItems="\r\n";
					String result="\r\n";
					String refRange="\r\n";
					String method="\r\n";
					for(Map<String,Object> resultMap:resultList) {
						testItems+=resultMap.get("testItems")+"\r\n\r\n";
						result+=resultMap.get("result")+"\r\n\r\n";
						refRange+=resultMap.get("refRange")+"\r\n\r\n";
						method+=resultMap.get("method")+"\r\n\r\n";
					}
					form.setField("testItems", testItems);
					form.setField("result", result);
					form.setField("refRange", refRange);
					form.setField("method", method);
				}
				
				ps.setFormFlattening(true);
				ps.close();
				doc.open();
				doc.close();
				System.out.println("===============PDF导出成功=============");
			} catch (Exception e) {
				e.printStackTrace();
			} finally {
				try {
					os.close();
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}
	}
	
	public static String getRequestJsonString(HttpServletRequest request)
            throws IOException {
        String submitMehtod = request.getMethod();
        // GET
        if (submitMehtod.equals("GET")) {
          return new String(request.getQueryString().getBytes("iso-8859-1"),"utf-8").replaceAll("%22", "\"");
            // POST
        } else {
            return getRequestPostStr(request);
        }
    }
	
	public static byte[] getRequestPostBytes(HttpServletRequest request)
            throws IOException {
        int contentLength = request.getContentLength();
        if(contentLength<0){
            return null;
        }
        byte buffer[] = new byte[contentLength];
        for (int i = 0; i < contentLength;) 
        {
            int readlen = request.getInputStream().read(buffer, i,
                    contentLength - i);
            if (readlen == -1) {
                break;
            }
            i += readlen;
        }
        return buffer;
    }
	
	public static String getRequestPostStr(HttpServletRequest request)
            throws IOException {
        byte buffer[] = getRequestPostBytes(request);
        String charEncoding = request.getCharacterEncoding();
        if (charEncoding == null) {
            charEncoding = "UTF-8";
        }
        return new String(buffer, charEncoding);
    }

PdfFileController.java：

@Controller
@RequestMapping("/pdfFile")
public class PdfFileController {
	
	@Resource
	private PdfFileBlh blh;
	
	@RequestMapping(params="BLHMI=exportPdfFile")
    public void exportNoEndFormList(HttpServletRequest request, HttpServletResponse response) throws IOException {
        blh.exportPdfFile(request,response);
    }
}

2.html代码：
 

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
		<title>生成PDF文件</title>
		<jsp:include page="/WEB-INF/jsp/common/scriptInc.jsp"></jsp:include>
		<jsp:include page="/WEB-INF/jsp/common/styleInc.jsp"></jsp:include>
		<script type="text/javascript">
			function exportPdfFile(){
				$("#downPdfFileForm").submit();
			}
		</script>
	</head>
	
	<body>
		<div class="">
			<div class="">
				<div id="handout_wrap_inner">
					<form id="downPdfFileForm" action="http://localhost:8080/demo/pdfFile?BLHMI=exportPdfFile" method="post">
						<input name="jsonString" value='{"hospitalId":"14064","hospitalName":"揭阳市人民医院","name":"张三","gender":"男","age":"26岁","patNo":"0001278568","clinic":"全科医学科简易门诊","bedNo":"16床","specimen":"咽拭子","repNo":"110254767","serialNo":"0","doctor":"核酸检测号","applicationTime":"2021-02-18 15:17","advName":"新型冠状病毒核酸RNA检测(自费)","idType":"身份证","idNo":"EC3263698","dateOfCollection":"2021-02-18 15:30","dateOfReceipt":"2021-02-19 11:13","specimenCollector":"黄敏华","specimenReceiver":"钟乔华","dateOfInspection":"2021-02-19 11:15","dateOfReport":"2021-02-19 11:15","reportedBy":"陈舒兰","inspectedBy":"钟乔华","resultList":[{	"testItems":"2019新型冠状病毒核酸检测",	"result":"阴性(-)",	"refRange":"阴性(-)",	"method":"RT-PCR"},{	"testItems":"Nucleic Acid Test For SARA-Cov-2",	"result":"Negative(-)",	"refRange":"Negative(-)",	"method":"RT-PCR"},{	"testItems":"2019-nCov ORFlab基因",	"result":"阴性Negative(-)",	"refRange":"阴性Negative(-)",	"method":"RT-PCR"},{	"testItems":"2019-nCov N基因",	"result":"阴性Negative(-)",	"refRange":"阴性Negative(-)",	"method":"RT-PCR"}]}'/>
					</form>
					<a href="javascript:void(0);" onclick="exportPdfFile()">下载</a>
				</div>
			</div>
		</div>
	</body>
</html>

java根据pdf模板生成指定格式的pdf文件

一、工具准备

事先得准备好Adobe Acrobat DC，这是一款专门编辑pdf的工具，小编已经给大家准备好了。
链接：https://pan.baidu.com/s/1jsaCMnRaHTHBVEmwJw6yjA
提取码：ichi

二、接下家就是教大家怎么设计文档模板

1.首先用word（或者wps）设计出一个word类型的模板，通过word可以设计文件内容的格式。

2.将设计好的word文件另存为pdf文件

3.用Adobe Acrobat DC打开刚刚存储的pdf文件，然后点击左侧准备表单的选项。

4.然后点击开始

5.然后pdf就会变成下面的样子。

6.做完上面的工作pdf模板就算大功告成了，直接将pdf文件保存就好了。

java代码的编写

• 首先项目结构设计如下
  
• 包依赖关系如下

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.kejizhentan</groupId>
  <artifactId>itext_acrobat</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <dependencies>
  	<dependency>
  		<groupId>com.itextpdf</groupId>
  		<artifactId>itextpdf</artifactId>
  		<version>5.5.10</version>
  	</dependency>
  	<dependency>
  		<groupId>com.itextpdf</groupId>
  		<artifactId>itext-asian</artifactId>
  		<version>5.2.0</version>
  	</dependency>
  </dependencies>
</project>

• java代码设计如下

package com.kejizhentan;

import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
 
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.AcroFields;
import com.itextpdf.text.pdf.PdfCopy;
import com.itextpdf.text.pdf.PdfImportedPage;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
 
public class PdfPractise {
	// 利用模板生成pdf
	public static void fillTemplate() {
		// 模板路径
		String templatePath = "E:/java17/java_practise/itext_acrobat/src/main/resources/temp/pdf模板.pdf";
		// 生成的新文件路径
		String newPDFPath = "E:/java17/java_practise/itext_acrobat/src/main/resources/temp/pdf练习.pdf";
		PdfReader reader;
		FileOutputStream out;
		ByteArrayOutputStream bos;
		PdfStamper stamper;
		try {
			out = new FileOutputStream(newPDFPath);// 输出流，该类用来创建一个文件并向文件中写数据（从内存中写到硬盘文件中）
			reader = new PdfReader(templatePath);// 读取pdf模板，将硬盘中的数据'读'到内存中
			bos = new ByteArrayOutputStream();// 捕获内存缓冲区的数据，转换成字节数组
			stamper = new PdfStamper(reader, bos);
			AcroFields form = stamper.getAcroFields();
 
			String[] str = { "123456789", "柯基", "男", "1994-09-08", "110101199409085715","计算机科学与技术", "北京市西城区安河桥北" };
			int i = 0;
			java.util.Iterator<String> it = form.getFields().keySet().iterator();
			while (it.hasNext()) {
				String name = it.next().toString();
				System.out.println(name+":"+str[i]);
				form.setField(name, str[i++]);
			}
			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();
 
		} catch (IOException e) {
			System.out.println(e.toString());
		} catch (DocumentException e) {
			System.out.println(2);
		}
 
	}
 
	public static void main(String[] args) {
		fillTemplate();
	}
}

运行上述代码就能获取对应格式的pdf文件。*
####################################################################################################################################################################################################################################################################################################
接下来小编教大家怎么给pdf模板加上水印

• 第一步准备水印图片
  
• 第二步对照下组图一步步操作就可以了
  
  
  
  
  
  
  
  根据以上步骤，带有水印的pdf文件就制作好了。接下来就是代码部分了。
• 包的依赖关系

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.kejizhentan</groupId>
  <artifactId>itext_acrobat</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <dependencies>
  	<dependency>
  		<groupId>com.itextpdf</groupId>
  		<artifactId>itextpdf</artifactId>
  		<version>5.5.10</version>
  	</dependency>
  	<dependency>
  		<groupId>com.itextpdf</groupId>
  		<artifactId>itext-asian</artifactId>
  		<version>5.2.0</version>
  	</dependency>
  </dependencies>
</project>

• java代码设计

package com.kejizhentan;

import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.AcroFields;
import com.itextpdf.text.pdf.PdfCopy;
import com.itextpdf.text.pdf.PdfImportedPage;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;

public class PdfPractise2 {
     
    public static void templetTicket(){ 
    		//模板的路径
    		String templatePdfPath = "E:/java17/java_practise/itext_acrobat/src/main/resources/temp/卖身契模板.pdf";
    		// 生成的新文件路径
    		String newPDFPath = "E:/java17/java_practise/itext_acrobat/src/main/resources/temp/卖身契.pdf";
    		FileOutputStream fos;
    		PdfReader reader;
    		ByteArrayOutputStream bos;
    		PdfStamper ps ;
    		try {
    			fos = new FileOutputStream(newPDFPath);
    			reader = new PdfReader(templatePdfPath); //将硬盘中的文件数据读取到内存中 
    			bos = new ByteArrayOutputStream();  
				ps = new PdfStamper(reader, bos);  //将内存中的数据暂存到字节数组中
				AcroFields form = ps.getAcroFields();//获取模板文件中的表单域
				String[] str = {"柯基小四","柯基侦探","柯基小四","柯基侦探","柯基小四","柯基侦探","2020-11-28","北京市昌平区十三陵镇"};
				int i = 0;
				java.util.Iterator<String> it = form.getFields().keySet().iterator();//用迭代器遍历pdf中的所有域
				while (it.hasNext()) {
					String name = it.next().toString();
					System.out.println(name+":"+str[i]);
					form.setField(name, str[i++]);
				}
				ps.setFormFlattening(true);// 如果为false那么生成的PDF文件还能编辑，一定要设为true
				ps.close();
				Document doc = new Document();
				PdfCopy copy = new PdfCopy(doc, fos);
				doc.open();
				PdfImportedPage importPage = copy.getImportedPage(new PdfReader(bos.toByteArray()), 1);
				copy.addPage(importPage);
				doc.close();
    		} catch (IOException e) {
    			System.out.println(e.toString());
    		} catch (DocumentException e) {
    			System.out.println(2);
    		}
 
    }  

    public static void main(String[] args){
    	templetTicket();
	}
}

执行上述代码就能生成带有水印的pdf文件了。