spring boot 生成PDF模板文件
1、主要目录
2、maven依赖
cn.hutool
hutool-all
5.7.19
com.alibaba
fastjson
1.2.76
org.apache.velocity
velocity
1.7
com.itextpdf
html2pdf
4.0.3
com.itextpdf
font-asian
7.2.3
3、新建一个demo.html静态文件，后续导出模板就是按照此文件进行的
模板pdf
表1
| 姓名 | $!{name} | ||
|---|---|---|---|
| 性别 | #if($!{gender}==1) 男 #else 女 #end | ||
| 出生日期 | $!{birthDate} | 联系方式 | $!{phone} |
双重For循环取值
表2
| 学历 | 学科 | 分数 |
|---|---|---|
| $item.name | #foreach($result in $item.itemList)||
| $velocityCount、$result.subject | 60) #else #end>$result.num |
4、新建PdfUtil工具类
import com.itextpdf.html2pdf.ConverterProperties;
import com.itextpdf.html2pdf.HtmlConverter;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.geom.PageSize;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.font.FontProvider;
import org.apache.velocity.Template;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.context.Context;
import org.apache.velocity.runtime.RuntimeConstants;
import org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader;
import java.io.OutputStream;
import java.io.StringWriter;
import java.nio.charset.StandardCharsets;
/**
* PDF工具
*
* @author ppp
* @date 2022/8/5
*/
public class PdfUtil {
static {
// Velocity初始化
Velocity.setProperty(RuntimeConstants.OUTPUT_ENCODING, StandardCharsets.UTF_8);
Velocity.setProperty(RuntimeConstants.INPUT_ENCODING, StandardCharsets.UTF_8);
Velocity.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
Velocity.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
Velocity.init();
}
/**
* 据模板生成pfd格式文件
*
* @param context 上下文对象
* @param template pdf模板
* @param outputStream 生成ofd文件输出流
*/
public static void pdfFile(Context context, String template, OutputStream outputStream) {
try (PdfWriter pdfWriter = new PdfWriter(outputStream)) {
PdfDocument pdfDocument = new PdfDocument(pdfWriter);
pdfDocument.setDefaultPageSize(PageSize.A4);
ConverterProperties properties = new ConverterProperties();
FontProvider fontProvider = new FontProvider();
// 字体设置，解决中文不显示问题
PdfFont sysFont = PdfFontFactory.createFont("STSongStd-Light", "UniGB-UCS2-H");
fontProvider.addFont(sysFont.getFontProgram(), "UniGB-UCS2-H");
properties.setFontProvider(fontProvider);
Template pfdTemplate = Velocity.getTemplate(template, "UTF-8");
StringWriter writer = new StringWriter();
pfdTemplate.merge(context, writer);
HtmlConverter.convertToPdf(writer.toString(), pdfDocument, properties);
pdfDocument.close();
} catch (Exception e) {
throw new RuntimeException("PFD文件生成失败", e);
}
}
}
5、Controller接口测试，也可以根据业务来分层service
package com.example.springboot3.controller;
import cn.hutool.core.date.DateUtil;
import cn.hutool.core.util.CharsetUtil;
import cn.hutool.core.util.URLUtil;
import com.example.springboot3.utils.PdfUtil;
import jakarta.servlet.ServletOutputStream;
import jakarta.servlet.http.HttpServletResponse;
import org.apache.velocity.VelocityContext;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.*;
@RestController
@RequestMapping("/velocity")
public class PdfController {
@GetMapping("/getPdf")
public void get(HttpServletResponse response){
response.reset();
response.setContentType("application/pdf");
String filename = System.currentTimeMillis()+".pdf";
response.addHeader("Content-Disposition", "inline; filename=" + URLUtil.encode(filename, CharsetUtil.CHARSET_UTF_8));
VelocityContext context = new VelocityContext();
context.put("name", "彭也行");
context.put("gender", 1);
context.put("birthDate", DateUtil.formatDateTime(new Date()));
context.put("phone", "13666666666");
List eduList = new ArrayList();
// 小学
Map primarySchoolMap = new HashMap();
primarySchoolMap.put("name", "小学");
List scoreList = new ArrayList();
// 语文成绩
Map chineseScore = new HashMap();
chineseScore.put("subject", "语文");
chineseScore.put("num", 60);
// 数学成绩
Map mathScore = new HashMap();
mathScore.put("subject", "数学");
mathScore.put("num", 99);
scoreList.add(chineseScore);
scoreList.add(mathScore);
primarySchoolMap.put("itemList", scoreList);
primarySchoolMap.put("size", scoreList.size());
// 初中
Map middleSchoolMap = new HashMap();
middleSchoolMap.put("name", "初中");
List middleScoreList = new ArrayList();
// 语文成绩
Map middleChineseScore = new HashMap();
middleChineseScore.put("subject", "语文");
middleChineseScore.put("num", 60);
// 数学成绩
Map middleMathScore = new HashMap();
middleMathScore.put("subject", "数学");
middleMathScore.put("num", 99);
// 英语
Map middleEnScore = new HashMap();
middleEnScore.put("subject", "英语");
middleEnScore.put("num", 55);
middleScoreList.add(middleChineseScore);
middleScoreList.add(middleMathScore);
middleScoreList.add(middleEnScore);
middleScoreList.add(middleEnScore);
middleScoreList.add(middleEnScore);
middleScoreList.add(middleEnScore);
middleScoreList.add(middleEnScore);
middleScoreList.add(middleEnScore);
middleSchoolMap.put("itemList", middleScoreList);
middleSchoolMap.put("size", middleScoreList.size());
eduList.add(primarySchoolMap);
eduList.add(middleSchoolMap);
context.put("eduList", eduList);
try(ServletOutputStream outputStream = response.getOutputStream()){
PdfUtil.pdfFile(context, "static/demo.html", outputStream);
}catch (Exception e){
e.printStackTrace();
}
}
}
6、调用接口浏览器预览
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