(1)Adobe Acrobat pro軟體：用來製作匯出模板

(2)itext的jar包

<dependency>
   <groupId>com.itextpdf</groupId>
   <artifactId>itextpdf</artifactId>
   <version>5.4.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/itext/itext -->
<dependency>
   <groupId>itext</groupId>
   <artifactId>itext</artifactId>
   <version>1.3</version>
</dependency>
(3)先用word做出模板介面

(4)將world輸出為pdf

(5)用Adobe Acrobat pro軟體開啟剛剛生成的pdf

（6）工具類引入

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

import javax.servlet.ServletOutputStream;

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Font;
import com.itextpdf.text.pdf.*;

public class PdfUtil {
   /**
    * 
    * @param o 寫入的資料
    * @param out 自定義儲存pdf的檔案流
    * @param templatePath pdf模板路徑
    */
   // 利用模板生成pdf
    public  void fillTemplate(Map<String,Object> o,ServletOutputStream out,String templatePath) {
        PdfReader reader;
        ByteArrayOutputStream bos; 
        PdfStamper stamper;
        try {
            BaseFont bf = BaseFont.createFont("c://windows//fonts//simsun.ttc,1" , BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
            Font FontChinese = new Font(bf, 2, Font.NORMAL);
            reader = new PdfReader(templatePath);// 讀取pdf模板
            bos = new ByteArrayOutputStream();
            stamper = new PdfStamper(reader, bos);
            AcroFields form = stamper.getAcroFields();
            java.util.Iterator<String> it = form.getFields().keySet().iterator();
            form.addSubstitutionFont(bf);
            while (it.hasNext()) {
                String name = it.next().toString();
                String value = o.get(name)!=null?o.get(name).toString():null;
                form.setField(name,value);
            }
            stamper.setFormFlattening(true);// 如果為false那麼生成的PDF檔案還能編輯，一定要設為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);
        } catch (DocumentException e) {
            System.out.println(e);
        }
    }
}

（7）controller呼叫

public String  materialRequisition(HttpServletResponse response){
    //製造假資料，結合前端我打算用map接收
    String createDate = "2021/12/7";
    String name = "夏帥";
    String productName = "70 A125";
    String type = "雙非";
    double num = 50.0;
    double price = 10.00;
    String orderId = "202112001";
    double money = num*price;
    String maker = "加急訂單";
    String library = "蘇州";
    Map<String,Object> map = new HashMap<>();
    map.put("name",name);
    map.put("createDate",createDate);
    map.put("productName",productName);
    map.put("price",price);
    map.put("num",num);
    map.put("type",type);
    map.put("money",money);
    map.put("maker",maker);
    map.put("library",library);
    map.put("orderId",orderId);

    /*// 設定response引數，可以開啟下載頁面
    response.reset();
    response.setCharacterEncoding("UTF-8");
    // 定義輸出型別
    response.setContentType("application/PDF;charset=utf-8");
    response.setHeader("Content-Disposition", "attachment; filename=" + "assessment.pdf");*/
    try {
        ServletOutputStream out = response.getOutputStream();
        PdfUtil pdf = new PdfUtil();
//src/main/resources/static/swagger/images/msgh.pdf   模板路徑記得更換自己的，我放在專案裡面了

        pdf.fillTemplate(map ,out,"src/main/resources/static/swagger/images/msgh.pdf");
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return null;
}

效果：