springboot各種格式轉pdf的例項程式碼
阿新 • • 發佈:2021-01-07
新增依賴
<!--轉pdf--> <dependency> <groupId>com.documents4j</groupId> <artifactId>documents4j-local</artifactId> <version>1.0.3</version> </dependency> <dependency> <groupId>com.documents4j</groupId> <artifactId>documents4j-transformer-msoffice-word</artifactId> <version>1.0.3</version> </dependency> <dependency> <groupId>com.itextpdf</groupId> <artifactId>itextpdf</artifactId> <version>5.5.10</version> </dependency>
測試方法
package com.ruoyi.mlogin.util; import com.documents4j.api.DocumentType; import com.documents4j.api.IConverter; import com.documents4j.job.LocalConverter; import com.itextpdf.text.*; import com.itextpdf.text.pdf.PdfWriter; import java.io.*; import java.net.MalformedURLException; /** * @author cai * @version 1.0 * @date 2021/1/4 14:58 */ public class Topdf { /** * 轉pdf doc docx xls xlsx * @param path */ public void docTopdf(String path) { File inputWord = new File("C:\\Users\\29934\\Documents\\Tencent Files\\2993481541\\FileRecv\\1111.docx"); File outputFile = new File("C:\\Users\\29934\\Documents\\Tencent Files\\2993481541\\FileRecv\\1111.pdf"); try { InputStream docxInputStream = new FileInputStream(inputWord); OutputStream outputStream = new FileOutputStream(outputFile); IConverter converter = LocalConverter.builder().build(); String fileTyle=path.substring(path.lastIndexOf("."),path.length());//獲取檔案型別 if(".docx".equals(fileTyle)){ converter.convert(docxInputStream).as(DocumentType.DOCX).to(outputStream).as(DocumentType.PDF).execute(); }else if(".doc".equals(fileTyle)){ converter.convert(docxInputStream).as(DocumentType.DOC).to(outputStream).as(DocumentType.PDF).execute(); }else if(".xls".equals(fileTyle)){ converter.convert(docxInputStream).as(DocumentType.XLS).to(outputStream).as(DocumentType.PDF).execute(); }else if(".xlsx".equals(fileTyle)){ converter.convert(docxInputStream).as(DocumentType.XLSX).to(outputStream).as(DocumentType.PDF).execute(); } outputStream.close(); System.out.println("pdf轉換成功"); } catch (Exception e) { e.printStackTrace(); } } /** * * 生成pdf檔案 * 需要轉換的圖片路徑的陣列 */ public static void main(String[] args) { try { String imagesPath = "C:\\Users\\29934\\Documents\\Tencent Files\\2993481541\\FileRecv\\1111.jpg"; File file = new File("C:\\Users\\29934\\Documents\\Tencent Files\\2993481541\\FileRecv\\1111.pdf"); // 第一步:建立一個document物件。 Document document = new Document(); document.setMargins(0,0); // 第二步: // 建立一個PdfWriter例項, PdfWriter.getInstance(document,new FileOutputStream(file)); // 第三步:開啟文件。 document.open(); // 第四步:在文件中增加圖片。 if (true) { Image img = Image.getInstance(imagesPath); img.setAlignment(Image.ALIGN_CENTER); // 根據圖片大小設定頁面,一定要先設定頁面,再newPage(),否則無效 document.setPageSize(new Rectangle(img.getWidth(),img.getHeight())); document.newPage(); document.add(img); //下面是對應一個資料夾的圖片 // File files = new File(imagesPath); // String[] images = files.list(); // int len = images.length; // // for (int i = 0; i < len; i++) // { // if (images[i].toLowerCase().endsWith(".bmp") // || images[i].toLowerCase().endsWith(".jpg") // || images[i].toLowerCase().endsWith(".jpeg") // || images[i].toLowerCase().endsWith(".gif") // || images[i].toLowerCase().endsWith(".png")) { // String temp = imagesPath + "\\" + images[i]; // Image img = Image.getInstance(temp); // img.setAlignment(Image.ALIGN_CENTER); // // 根據圖片大小設定頁面,一定要先設定頁面,再newPage(),否則無效 // document.setPageSize(new Rectangle(img.getWidth(),img.getHeight())); // document.newPage(); // document.add(img); // } // } // 第五步:關閉文件。 document.close(); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (BadElementException e) { e.printStackTrace(); } catch (DocumentException e) { e.printStackTrace(); } } }
補充:下面看下springboot:擴充套件型別轉換器
需求:提交一個字串到後端的java.sql.Time型別,就報錯了:
Failed to convert property value of type [java.lang.String] to required type [java.sql.Time]
正常提交到java.util.Date型別是沒有問題的。
所以這裡就需要擴充套件內建的springmvc的轉換器
程式碼如下:
WebConfig : 新增新的型別轉換器
import javax.annotation.PostConstruct; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Configuration; import org.springframework.core.convert.support.GenericConversionService; import org.springframework.web.bind.support.ConfigurableWebBindingInitializer; import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter; import com.csget.web.converter.StringToTimeConverter; @Configuration public class WebConfig { @Autowired private RequestMappingHandlerAdapter requestMappingHandlerAdapter; @PostConstruct public void addConversionConfig() { ConfigurableWebBindingInitializer initializer = (ConfigurableWebBindingInitializer) requestMappingHandlerAdapter .getWebBindingInitializer(); if (initializer.getConversionService() != null) { GenericConversionService genericConversionService = (GenericConversionService) initializer.getConversionService(); genericConversionService.addConverter(new StringToTimeConverter()); } } }
StringToTimeConverter :型別轉換器的具體實現
import java.sql.Time; import java.text.SimpleDateFormat; import java.util.Date; import org.apache.commons.lang3.StringUtils; import org.springframework.core.convert.converter.Converter; public class StringToTimeConverter implements Converter<String,Time> { public Time convert(String value) { Time time = null; if (StringUtils.isNotBlank(value)) { String strFormat = "HH:mm"; int intMatches = StringUtils.countMatches(value,":"); if (intMatches == 2) { strFormat = "HH:mm:ss"; } SimpleDateFormat format = new SimpleDateFormat(strFormat); Date date = null; try { date = format.parse(value); } catch (Exception e) { e.printStackTrace(); } time = new Time(date.getTime()); } return time; } }
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