使用itextpdf生成pdf，设置图片和中文

柔情只为你懂 2021-10-15 03:47 532阅读 0赞

# 依赖 #

<dependency>
        <groupId>com.itextpdf</groupId>
        <artifactId>itextpdf</artifactId>
        <version>5.5.13</version>
    </dependency>

中文字体，我是在windows 10 上找的宋体`C:\Windows\Fonts\STSONG.TTF`

放在springboot的resources目录font下面

# 简单的工具类 #

package com.cgw.utils;
    
    
    import com.itextpdf.text.*;
    import com.itextpdf.text.pdf.BaseFont;
    import com.itextpdf.text.pdf.PdfWriter;
    import org.apache.commons.lang3.ArrayUtils;
    import org.springframework.core.io.ClassPathResource;
    
    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    
    public class PdfUtil { 
    
    
        /** * 将图片写入pdf * * @param imageFiles * @return * @throws IOException */
        public static File generatePdf(File... imageFiles) throws IOException, DocumentException { 
            if (ArrayUtils.isEmpty(imageFiles)) { 
                return null;
            }
            File pdfFile = FileUtil.createTempFile("tmp.pdf");
    
            ClassPathResource resource = new ClassPathResource("font/STSONG.TTF");
            BaseFont baseFont = BaseFont.createFont(resource.getURL().toString(), BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
            Font font = new Font(baseFont);
            // 创建文件
            Document document = new Document();
            // 建立一个书写器
            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(pdfFile));
            writer.setStrictImageSequence(true);
            // 打开文件
            document.open();
            // 添加内容
            Paragraph paragraph = new Paragraph("你好世界，hello world", font);
            paragraph.setAlignment(Element.ALIGN_CENTER);
            document.add(paragraph);
    
            float scalePercentage = (72 / 300f) * 100.0f;
    
            for (File imageFile : imageFiles) { 
                // 图片
                Image image = Image.getInstance(imageFile.getAbsolutePath());
                image.scalePercent(scalePercentage, scalePercentage);
                image.setAlignment(Element.ALIGN_CENTER);
                // 将图片1添加到pdf文件中
                document.add(image);
            }
            // 关闭文档
            document.close();
            // 关闭书写器
            writer.close();
    
            return pdfFile;
        }
    }

FileUtil.java

package com.casic.dataapplication.utils;
    
    import org.apache.commons.io.FileUtils;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    import java.io.*;
    import java.nio.file.Path;
    import java.nio.file.Paths;
    import java.util.UUID;
    
    public class FileUtil { 
        private static Logger logger = LoggerFactory.getLogger(FileUtil.class);
        private static final String TMP_FILE_NAME = "file.tmp"
    
        public static Path getTempPath() { 
            String realPath = System.getProperty("java.io.tmpdir");
            String id = UUID.randomUUID().toString().replace("-", "");
            Path path = Paths.get(realPath, id);
            try { 
                FileUtils.forceMkdir(path.toFile());
            } catch (IOException e) { 
                logger.error("创建临时目录异常：{}", e);
                throw new RuntimeException(e);
            }
            return path;
        }
    
        /** * 创建一个临时文件 * * @param filename * @return */
        public static File createTempFile(String filename) { 
            return getTempPath().resolve(filename).toFile();
        }
    
        /** * 创建一个临时文件 * * @return */
        public static File createTempFile() { 
            return getTempPath().resolve(TMP_FILE_NAME).toFile();
        }
    
        /** * 删除一个文件 */
        public static boolean deleteFile(File file) { 
            logger.debug("删除文件：{}", file.getAbsolutePath());
            return FileUtils.deleteQuietly(file);
        }
    
        /** * 删除一个文件同时删除父目录 * * @return true删除成功，false删除失败 */
        public static boolean deleteFileAndParentPath(File file) { 
            logger.debug("删除文件和父目录：{}", file.getAbsolutePath());
            return FileUtils.deleteQuietly(file) && FileUtils.deleteQuietly(file.getParentFile());
        }
    
    }

调用时传的图片资源  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyYW5rY2hlbmc1MTQz_size_16_color_FFFFFF_t_70]

效果图  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyYW5rY2hlbmc1MTQz_size_16_color_FFFFFF_t_70 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyYW5rY2hlbmc1MTQz_size_16_color_FFFFFF_t_70]: /images/20211015/ea5c789f238e497489c57b7f904a0366.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyYW5rY2hlbmc1MTQz_size_16_color_FFFFFF_t_70 1]: /images/20211015/f9ef92d9dd994008ba1cb1c403bfb2ae.png