Spring boot实现自定义html页面转pdf，并下载

你的名字 2024-03-23 15:09 88阅读 0赞

**场景:**

**将前端传入的值，直接插入指定的模板中，来生成pdf租房合同，生成的pdf样式,使用html页面来控制。**

**代码如下:**

**首先:**

**使用了velocity模板引擎技术来实现传值稳定插入到指定位置。**

![e1d73d5f46db4f12be94bea1a9a06d1a.png][]

以上是html模板 ，要求html遵守xhtml的规范，严格语法要求。

然后下面是引用的maven坐标

<dependencies>
    
            
            <dependency>
                <groupId>org.apache.velocity</groupId>
                <artifactId>velocity-engine-core</artifactId>
                <version>2.3</version>
            </dependency>
            <dependency>
                <groupId>org.apache.velocity.tools</groupId>
                <artifactId>velocity-tools-generic</artifactId>
                <version>3.1</version>
            </dependency>
            <dependency>
                <groupId>org.apache.velocity.tools</groupId>
                <artifactId>velocity-tools-view</artifactId>
                <version>3.1</version>
            </dependency>
            <dependency>
                <groupId>org.apache.velocity.tools</groupId>
                <artifactId>velocity-tools-view-jsp</artifactId>
                <version>3.0</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.freemarker</groupId>
                <artifactId>freemarker</artifactId>
                <version>2.3.23</version>
            </dependency>
            
            <dependency>
                <groupId>org.xhtmlrenderer</groupId>
                <artifactId>flying-saucer-pdf</artifactId>
                <version>9.1.8</version>
            </dependency>
    
            <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itextpdf</artifactId>
                <version>5.5.11</version>
            </dependency>
            <dependency>
                <groupId>com.itextpdf.tool</groupId>
                <artifactId>xmlworker</artifactId>
                <version>5.5.8</version>
            </dependency>
            <dependency>
                <groupId>org.xhtmlrenderer</groupId>
                <artifactId>flying-saucer-pdf</artifactId>
                <version>9.0.3</version>
            </dependency>
            <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itext-asian</artifactId>
                <version>5.2.0</version>
            </dependency>
            <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itext-pdfa</artifactId>
                <version>5.5.8</version>
            </dependency>
    
            <dependency>
                <groupId>org.apache.pdfbox</groupId>
                <artifactId>pdfbox</artifactId>
                <version>2.0.19</version>
            </dependency>
    
            
            <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itextpdf</artifactId>
                <version>5.5.13</version>
            </dependency>
    
    
        </dependencies>

然后上代码:

接口层:

import cn.hutool.core.io.file.FileWriter;
    import cn.hutool.core.util.RandomUtil;
    import com.xr.common.constant.Constants;
    import com.xr.common.core.domain.R;
    import com.xr.rent.underlease.underleaseroom.domain.RentUnderLeaseRoom;
    import io.swagger.annotations.Api;
    import io.swagger.annotations.ApiOperation;
    import org.apache.velocity.Template;
    import org.apache.velocity.VelocityContext;
    import org.apache.velocity.app.Velocity;
    import org.apache.velocity.app.VelocityEngine;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestBody;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import javax.servlet.http.HttpServletResponse;
    import java.io.*;
    import java.util.Properties;
    
    @Api(tags = "获取租赁模板")
    @RestController
    @RequestMapping("/redPdfModelController")
    public class RedPdfModelController {
    
    
        @ApiOperation(value = "获取传入数据后的内容", httpMethod = "GET")
        @PostMapping("/getModel")
        //这里传值
        public R get(@RequestBody RentUnderLeaseRoom rentUnderLeaseRoom, HttpServletResponse response) throws FileNotFoundException {
            VelocityEngine ve = new VelocityEngine();
            Properties p = new Properties();
    
            // 加载classpath目录下的vm文件,指定vm文件加载目录
            p.setProperty("resource.loader.file.class", "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
            p.setProperty(Velocity.INPUT_ENCODING, Constants.UTF8);
            // 初始化Velocity引擎，指定配置Properties
    //        Velocity.init(p);
            ve.setProperty(Velocity.ENCODING_DEFAULT, "UTF-8");
            ve.setProperty(Velocity.INPUT_ENCODING, "UTF-8");    //指定编码格式，避免生成模板就造成乱码
            ve.init(p);
    
            //取得velocity的模板
            Template t = ve.getTemplate("vmmodel/contract.html.vm", "UTF-8");
    
            //取得velocity的上下文
            VelocityContext context = new VelocityContext();
            //往vm中写入信息
            //写入自己要插入的信息，
            context.put("username", rentUnderLeaseRoom.getUnitName());
            StringWriter writer = new StringWriter();
    
            //把数据填入上下文
            t.merge(context, writer);
    
            //输出流
            String testPath = "";
    
            String pdfDownlad = "";
    
    
            String out = writer.toString();
            String osName = System.getProperty("os.name");
            if (osName.toLowerCase().startsWith("win")) {
                testPath = "D:\\checkHtml\\" + RandomUtil.randomNumbers(20) + ".html";
                pdfDownlad = "D:\\testPdf\\" + RandomUtil.randomNumbers(20) + ".pdf";
            } else {
                testPath = "/opt/checkHtml/" + RandomUtil.randomNumbers(20) + ".html";
                pdfDownlad = "/opt/checkPdf/" + RandomUtil.randomNumbers(20) + ".pdf";
            }
    
    
            File file = new File(testPath);
    
            FileWriter fileWriter = FileWriter.create(file);
            fileWriter.write(out);
    
    
            try {
                FileTypeConvertUtil.html2pdf(file.getAbsolutePath(), pdfDownlad);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
    
    
            BufferedInputStream bis = null;
            OutputStream os = null;
            FileInputStream fileInputStream = null;
    
            try {
                fileInputStream = new FileInputStream(pdfDownlad);
                byte[] buff = new byte[1024];
                bis = new BufferedInputStream(fileInputStream);
                os = response.getOutputStream();
    
                int i = bis.read(buff);
                while (i != -1) {
                    os.write(buff, 0, buff.length);
                    i = bis.read(buff);
                    os.flush();
                }
                os.flush();
                os.close();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                if (bis != null) {
                    try {
                        bis.close();
                        fileInputStream.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                        return R.fail("导出失败");
                    }
                }
            }
    
            response.setCharacterEncoding("utf-8");
            response.setContentType("application/pdf");
            response.setHeader("Content-Disposition", "attachment; filename=Encrypt.pdf");
    
    
            return R.ok("下载成功");
        }
    
    
    
    
    }

用到的工具类: 通过这个工具类来讲html转换为pdf，可先用main方法进行测试。

package com.xr.rent.readpdfmodel.controller;
    
    import com.itextpdf.text.pdf.BaseFont;
    import org.xhtmlrenderer.pdf.ITextFontResolver;
    import org.xhtmlrenderer.pdf.ITextRenderer;
    
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.OutputStream;
    
    /**
     * 文件格式转换工具类
     *
     * @author lbj
     * <p>
     * 2015-10-8 上午10:52:22
     */
    public class FileTypeConvertUtil {
    
        /**
         * 将HTML转成PD格式的文件。html文件的格式比较严格
         *
         * @param htmlFile
         * @param pdfFile
         * @throws Exception
         */
        // <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
        public static void html2pdf(String htmlFile, String pdfFile) throws Exception {
            // step 1
            String url = new File(htmlFile).toURI().toURL().toString();
            System.out.println(url);
            // step 2
            OutputStream os = new FileOutputStream(pdfFile);
            ITextRenderer renderer = new ITextRenderer();
            renderer.setDocument(url);
    
            // step 3 解决中文支持
            ITextFontResolver fontResolver = renderer.getFontResolver();
            if ("linux".equals(getCurrentOperatingSystem())) {
                fontResolver.addFont("/usr/share/fonts/chiness/simsun.ttc", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
            } else {
                fontResolver.addFont("c:/Windows/Fonts/simsun.ttc", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
            }
    
            renderer.layout();
            renderer.createPDF(os);
            os.close();
    
            System.out.println("create pdf done!!");
    
        }
    
        public static String getCurrentOperatingSystem() {
            String os = System.getProperty("os.name").toLowerCase();
            System.out.println("---------当前操作系统是-----------" + os);
            return os;
        }
    
    
        public static void main(String[] args) {
            //        String htmlFile = "/home/lbj/sign.jsp";
            //        String pdfFile = "/home/lbj/sign.pdf";
            String htmlFile = "d:/table.html";
            String pdfFile = "d:/testoone2.pdf";
            try {
                FileTypeConvertUtil.html2pdf(htmlFile, pdfFile);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

vm模板: 使用此模板来进行渲染

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
            "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html lang="en" xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <meta charset="UTF-8"/>
        <title>表格样式</title>
        <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width"/>
        <link rel="stylesheet" href="https://static.loyalvalleycapital.com/web/css/frame.css"/>
        <style>
    
        </style>
    </head>
    <body class="bg-white pb-3" style="font-family: SimSun;">
    <h1>合同</h1>
    <h2>甲方:${username}</h2>
    </body>
    </html>

以上就是全部代码，下面是效果图。

可以自定义css和html表现来实现效果。

![2590cfe861b945b2b453d53349f2bb0c.png][]

[e1d73d5f46db4f12be94bea1a9a06d1a.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/421fa41ed95e4cb78618bf6f3c38641f.png
[2590cfe861b945b2b453d53349f2bb0c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/23/a23d3c93c38b4d1eb4226aec6677b086.png