springboot itextpdf 形式导出pdf

先看效果(这里只设置了软件版本和完成情况的勾选框)
导入pom依赖

<dependency><groupId>com.itextpdf</groupId><artifactId>itext-asian</artifactId><version>5.2.0</version>
</dependency>
<!--itextpdf-->
<dependency><groupId>com.itextpdf</groupId><artifactId>itextpdf</artifactId><version>5.5.10</version>
</dependency>

功能实现

package com.example.demotest.controller;import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;@RestController
public class PdfController {/*** 导出pdf** @param response* @return* @author shaolin*/@PostMapping(value = {"/exportpdf"})public String exportPdf(HttpServletResponse response) throws IOException {// 指定解析器System.setProperty("javax.xml.parsers.DocumentBuilderFactory","com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl");String filename = "pdf/计算机编号.pdf";response.setContentType("application/pdf");response.setHeader("Content-Disposition", "attachment;fileName="+ URLEncoder.encode(filename, StandardCharsets.UTF_8));OutputStream os = null;PdfStamper ps = null;PdfReader reader = null;try {os = response.getOutputStream();// 2 读入pdf表单Path path = Paths.get("pdf", "计算机编号.pdf");String pathing = path.toAbsolutePath().toString();// 输出文件路径reader = new PdfReader(pathing);// 3 根据表单生成一个新的pdfps = new PdfStamper(reader, os);// 4 获取pdf表单AcroFields form = ps.getAcroFields();// 5给表单添加中文字体 这里采用系统字体。不设置的话，中文可能无法显示BaseFont bf = BaseFont.createFont("C:/WINDOWS/Fonts/SIMSUN.TTC,1",BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
//            BaseFont bf = BaseFont.createFont("SimSun.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);form.addSubstitutionFont(bf);// 6查询数据================================================Map<String, Object> data = new HashMap<String, Object>();data.put("deptName", "测试部门");data.put("version", "1");// 7遍历data 给pdf表单表格赋值for (String key : data.keySet()) {form.setField(key, data.get(key).toString());}// 多选框设置,  name是名称, value 是导出值ps.setFormFlattening(true);form.setField("test", "On", true);//            -----------------------------pdf 添加图片----------------------------------
//            通过域名获取所在页和坐标，左下角为起点System.out.println("pdf 添加图片");
//            String imgpath = "e:/美女.png";
//            int pageNo = form.getFieldPositions("img").get(0).page;
//            Rectangle signRect = form.getFieldPositions("img").get(0).position;
//            float x = signRect.getLeft();
//            float y = signRect.getBottom();
//            // 读图片
//            Image image = Image.getInstance(imgpath);
//            // 获取操作的页面
//            PdfContentByte under = 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);
//            under.addImage(image);} catch (DocumentException e) {throw new RuntimeException(e);} finally {try {ps.close();reader.close();os.close();} catch (Exception e) {e.printStackTrace();}}return null;}}