java生成pdf，基于html生成pdf，基于freemarker生成pdf

拼搏现实的明天。 2023-06-13 09:38 22阅读 0赞

首先在maven中引入相关依赖

<dependency>
    			<groupId>org.freemarker</groupId>
    			<artifactId>freemarker</artifactId>
    			<version>2.3.22</version>
    		</dependency>
    		<dependency>
    			<groupId>org.xhtmlrenderer</groupId>
    			<artifactId>flying-saucer-pdf</artifactId>
    			<version>9.1.11</version>
    		</dependency>

其中freemarker版本随意，flying-saucer-pdf架包建议使用最新的，因为老版本对html不友好，新版本做了很多兼容，还原度较高。

干活在这里

import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.OutputStream;
    import java.io.StringWriter;
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Locale;
    import java.util.Map;
    
    import org.xhtmlrenderer.pdf.ITextRenderer;
    
    import com.lowagie.text.DocumentException;
    import com.lowagie.text.pdf.BaseFont;
    
    import freemarker.template.Configuration;
    import freemarker.template.Template;
    import freemarker.template.Version;
    
    /**
     * 基于freemarker生成pdf<br/>
     * Author:杨杰超<br/>
     * Date:2019年11月15日 下午3:33:07 <br/>
     * Copyright (c) 2019, yangjiechao@dingtalk.com All Rights Reserved.<br/>
     *
     */
    public class GenPdfTest {
    
        /**
         * 生成测试数据
         */
        private static Map<String, Object> newData() {
            Map<String, Object> data = new HashMap<String, Object>();
            // 存入一个集合
            List<Object> cureseList = new ArrayList<Object>();
            cureseList.add(newCureseData("▲公共必修课1", "数理统计", "1/春", "2.5", "85"));
            cureseList.add(newCureseData("▲公共必修课2", "数理统计", "1/春", "2.5", "85"));
            cureseList.add(newCureseData("▲公共必修课3", "数理统计", "1/春", "2.5", "85"));
            cureseList.add(newCureseData("▲公共必修课4", "数理统计", "1/春", "2.5", "85"));
            cureseList.add(newCureseData("▲公共必修课5", "数理统计", "1/春", "2.5", "85"));
            // 课程加权平均成绩
            String avgAchievement = "-";
            String stuName = "Jc";
            String stuNo = "1111111";
            String stuGrade = "2019";
            String stuType = "研究生";
            String stuCollege = "软件学院";
            String stuTeacher = "何XX";
            String stuMajor = "计算机科学与技术";
    
            data.put("courseList", cureseList);
            data.put("avgAchievement", avgAchievement);
            data.put("stuName", stuName);
            data.put("stuNo", stuNo);
            data.put("stuGrade", stuGrade);
            data.put("stuType", stuType);
            data.put("stuCollege", stuCollege);
            data.put("stuTeacher", stuTeacher);
            data.put("stuMajor", stuMajor);
    
            return data;
        }
    
        /**
         * 生成测试数据
         * 
         * @param type
         * @param name
         * @param semester
         * @param credit
         * @param achievement
         * @return
         */
        private static Map<String, Object> newCureseData(String type, String name, String semester, String credit,
                String achievement) {
            Map<String, Object> map = new HashMap<String, Object>();
            map.put("type", type);
            map.put("name", name);
            map.put("semester", semester);
            map.put("credit", credit);
            map.put("achievement", achievement);
            return map;
        }
    
        public static void main(String[] args) throws Exception {
    
            Map<String, Object> data = newData();
    
            // 根路径
            String path = GenPdfTest.class.getResource("/").getPath().substring(1);
            // 模板名称
            String ftlName = "pdftest.ftl";
            // 图片路径
            String imageDiskPath = path + "imgs/";
            // 文件生成全路径
            String outputFile = "D:\\pdftest.pdf";
    
            generateToFile(path, ftlName, imageDiskPath, data, outputFile);
        }
    
        /**
         * 获取freemarker模板对象
         * 
         * @param ftlPath
         *            FTL模板路径
         * @param ftlName
         *            FTL模板名称
         * @return
         * @throws IOException
         */
        public static Template generateTemplate(String ftlPath, String ftlName) throws IOException {
            Configuration config = new Configuration(new Version("2.3.22"));
            config.setDirectoryForTemplateLoading(new File(ftlPath));
            config.setEncoding(Locale.CHINA, "UTF-8");
    
            Template template = config.getTemplate(ftlName);
            return template;
        }
    
        /**
         * 获取ITextRenderer渲染器
         * 
         * @param path
         *            根路径
         * @return
         * @throws DocumentException
         * @throws IOException
         */
        public static ITextRenderer generateITextRenderer(String path) throws DocumentException, IOException {
            ITextRenderer render = new ITextRenderer();
            // 添加字体，以支持中文
            render.getFontResolver().addFont(path + "fonts/arialuni.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
            render.getFontResolver().addFont(path + "fonts/simsun.ttc", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
    
            return render;
        }
    
        /**
         * 生成PDF到文件
         * 
         * @param ath
         *            根路径
         * @param ftlName
         *            模板文件吗（不含路径）
         * @param imageDiskPath
         *            图片的磁盘路径
         * @param data
         *            数据
         * @param outputFile
         *            目标文件（全路径名称）
         * @throws Exception
         */
        public static void generateToFile(String path, String ftlName, String imageDiskPath, Object data, String outputFile)
                throws Exception {
    
            Template tpl = generateTemplate(path + "ftl/", ftlName);
    
            StringWriter writer = new StringWriter();
            tpl.process(data, writer);
            writer.flush();
            String html = writer.toString();
    
            ITextRenderer render = generateITextRenderer(path);
    
            OutputStream out = new FileOutputStream(outputFile);
            render.setDocumentFromString(html);
            if (imageDiskPath != null && !"".equals(imageDiskPath)) {
                render.getSharedContext().setBaseURL("file:/" + imageDiskPath);
            }
            render.layout();
            render.createPDF(out);
            render.finishPDF();
            render = null;
            out.close();
        }
    }

freemarker模板ftl文件 print.ftl

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title></title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    
        <style type="text/css">
        body {
            font-family: Arial Unicode MS;
            background-image: url(BGforPrint.gif);
            width:650px;
            height:978px;
        }
        table,table tr th, table tr td { border: 1px solid #000000; }
        table { width: 100%; text-align: center; border-collapse: collapse;}   
        </style>
    </head>
    
    <body>
        <center>
            <strong><span><font size="5">XXXX成绩表</font></span></strong>
     
            <br/>
            <br/>
    
            <table>
                <tr>
                    <td>姓名</td>
                    <td>${stuName}</td>
                    <td>学号</td>
                    <td>${stuNo}</td>
                    <td>年级</td>
                    <td>${stuGrade}</td>
                </tr>
                <tr>
                    <td>学生类型</td>
                    <td>${stuType}</td>
                    <td>学院</td>
                    <td colspan="3">${stuCollege}</td>
                </tr>
                <tr>
                    <td>指导教师</td>
                    <td>${stuTeacher}</td>
                    <td>专业</td>
                    <td colspan="3">${stuMajor}</td>
                </tr>
            </table>
            <br/>
            <table>
                <tr>
                    <td colspan="7">成绩表</td>
                </tr>
                <tr>
                    <td>课程类别</td>
                    <td colspan="3">课程名称</td>
                    <td>上课学年/学期</td>
                    <td>学分</td>
                    <td>成绩</td>
                </tr>
                
                <#list courseList as course>
                <tr>
                    <td>${course.type}</td>
                    <td colspan="3">${course.name}</td>
                    <td>${course.semester}</td>
                    <td>${course.credit}</td>
                    <td>${course.achievement}</td>
                </tr>
                </#list>    
                
            </table>
        </center>
    </body>
    </html>

项目结构图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdqaWVjaGFvOTQ1_size_16_color_FFFFFF_t_70][]  
最终生成pdf：  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdqaWVjaGFvOTQ1_size_16_color_FFFFFF_t_70 1][]其中使用到了arialuni.ttf与simsum.ttc2个字体文件，这个在网上找找吧，就不放上来了。

就是这样，搞完收工~

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdqaWVjaGFvOTQ1_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191115174240842.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdqaWVjaGFvOTQ1,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdqaWVjaGFvOTQ1_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191115174350997.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lhbmdqaWVjaGFvOTQ1,size_16,color_FFFFFF,t_70