🤞SpringBoot项目中基于PDF模板生成PDF文档🤞 常见的使用方法有POI,ITEXT等模块的使用,本次基于ITEXT模块来实现基于PDF模板生成PDF新文件。
<!--pdf依赖-->
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.5.13</version>
</dependency>
<dependency>
<groupId>com.itextpdf.tool</groupId>
<artifactId>xmlworker</artifactId>
<version>5.5.13</version>
</dependency>
<!--pdf支持中文-->
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itext-asian</artifactId>
<version>5.2.0</version>
</dependency>
package org.dromara.docMake.util;
import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.AcroFields;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.Image;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
import io.vertx.core.http.HttpServerRequest;
import io.vertx.core.http.HttpServerResponse;
import jakarta.servlet.ServletOutputStream;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.IOUtils;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.util.ResourceUtils;
import java.io.*;
import java.net.URLEncoder;
import java.util.*;
import java.net.*;
/**
* @Author: 知识浅谈
* @Package: org.dromara.docMake.util
* @Date: 2024-5-10 15:16
* @Description: pdf生成工具类
* @Version: 1.0
*/
@Slf4j
public class PdfUtil {
private static boolean isPrimitiveOrWrapper(Class<?> clazz) { //检查传入的类是否为基本类型或基本包装类型
return clazz.isPrimitive() || clazz.getName().startsWith("java.lang");
}
//生成pdf
public static void generatePdf(HttpServletRequest request,
HttpServletResponse response,
String templatePath,//当前为文件名,之后改为文件路径
Map map,
String newFileName) {
try(OutputStream responseOutputStream = response.getOutputStream(); ByteArrayOutputStream fileOut= new ByteArrayOutputStream()){
if(!newFileName.endsWith(".pdf")) newFileName=newFileName+".pdf"; //
//模版在项目中的位置
Resource resource = new PathMatchingResourcePatternResolver().getResource(ResourceUtils.CLASSPATH_URL_PREFIX + "pdf/" + templatePath);
PdfReader pdfReader = new PdfReader(resource.getInputStream());
PdfStamper pdfStamper = new PdfStamper(pdfReader, fileOut);
BaseFont font = BaseFont.createFont(BaseFont.HELVETICA_BOLD, BaseFont.WINANSI, BaseFont.EMBEDDED);
ArrayList<BaseFont> fontList = new ArrayList<>();
fontList.add(font);
//取出报表模版中的所有字段
AcroFields fields = pdfStamper.getAcroFields();
fields.setSubstitutionFonts(fontList);
//根据占位符,填充图片
if(map.containsKey("头像")){ //假设要替换的占位符是头像这个占位符的位置
PdfUtil.fillPic(fields,pdfStamper,(String)map.get("头像")));
map.remove("头像");
}
//根据占位符进行替换,替换对应位置的值
PdfUtil.fillData(fields,map);
//必须要调用这个,否则文档不会生成的,如果为false,生成的pdf还能编辑,所以设置为true
pdfStamper.setFormFlattening(true);
pdfStamper.close();
writeFile(request,response,fileOut,newFileName);
}catch (Exception e){
e.printStackTrace();
}
}
/**
* 填充数据
*/
private static void fillData(AcroFields fields,Map<String,String> data) throws IOException, DocumentException {
Map<String, AcroFields.Item> formFields = fields.getFields();
String v;
for (String k : data.keySet()) {
if(formFields.containsKey(k)){
v = data.get(k);
fields.setField(k,v);
}
}
}
/**
* 填充图像
*/
private static void fillPic(AcroFields fields,PdfStamper pdfStamper,String headUrl) throws Exception{
//获取头像占位符中要替换的图片位置
AcroFields.FieldPosition headPosition = fields.getFieldPosition("头像").get(0);
Rectangle position = headPosition.position;
URL url = new URL(headUrl);
Image image = Image.getInstance(url);
//根据位置调整图片大小
image.scaleToFit(position.getWidth(),position.getHeight());
//设置图片位置
image.setAbsolutePosition(position.getLeft(),position.getBottom());
PdfContentByte content = pdfStamper.getOverContent(headPosition.page);
content.addImage(image); //添加图片
}
private static void writeFile(HttpServletRequest request,
HttpServletResponse response,
ByteArrayOutputStream fileOut,
String newFileName) throws IOException{
response.setCharacterEncoding(request.getCharacterEncoding());
response.setContentType("application/pdf");
try{
//这里主要防止下载的pdf文件名乱码
response.setHeader("Content-Disposition","attachment; filename="+ URLEncoder.encode(newFileName,"UTF-8"));
fileOut.writeTo(response.getOutputStream());
response.flushBuffer();
}catch (Exception e){
log.error("pdf生成异常");
throw new RuntimeException("pdf生成异常");
}
}
}
在resources下边创建pdf文件夹,然后使用 Adobe Acrobat DI创建一个PDF模板 在PDF模板中添加表单域,并设置表单域的变量名,便于后续替换
测试
@GetMapping("/pdfTest")
public void test(HttpServletRequest request, HttpServletResponse response) {
Map<String,String> map = new HashMap<>();
map.put("测试","要替换的内容");
map.put("头像","https://i-blog.csdnimg.cn/blog_migrate/2d9a150283cb6c437a5af251e0226136.png");
PdfUtil.generatePdf(request,response,"test.pdf",a,"测试");
}
然后就生成了一个替换之后带有图片的文档。
大功告成,撒花致谢🎆🎇🌟,关注我不迷路,带你起飞带你富。
Writted By 知识浅谈
扫码关注腾讯云开发者
领取腾讯云代金券
Copyright © 2013 - 2025 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有
深圳市腾讯计算机系统有限公司 ICP备案/许可证号:粤B2-20090059 深公网安备号 44030502008569
腾讯云计算(北京)有限责任公司 京ICP证150476号 | 京ICP备11018762号 | 京公网安备号11010802020287
Copyright © 2013 - 2025 Tencent Cloud.
All Rights Reserved. 腾讯云 版权所有