预览报表时生成分页的pdf

pom.xml

@@ -42,6 +42,7 @@
 		<commons.fileupload.version>1.3.2</commons.fileupload.version>
 		<fastjson.version>1.1.39</fastjson.version>
 		<httpclient.version>4.5.2</httpclient.version>
+		<itextpdf.version>5.5.9</itextpdf.version>
 	</properties>
 
 	<dependencies>
@@ -127,6 +128,13 @@
 			<artifactId>httpclient</artifactId>
 			<version>${httpclient.version}</version>
 		</dependency>
+
+		<!-- pdf操作 -->
+		<dependency>
+			<groupId>com.itextpdf</groupId>
+			<artifactId>itextpdf</artifactId>
+			<version>${itextpdf.version}</version>
+		</dependency>
 	</dependencies>
 
 	<build>

src/main/java/com/uas/report/service/impl/PrintServiceImpl.java

@@ -26,6 +26,10 @@ import org.springframework.util.StringUtils;
 import com.alibaba.druid.pool.DruidDataSource;
 import com.alibaba.druid.pool.DruidDataSourceFactory;
 import com.alibaba.fastjson.JSONObject;
+import com.itextpdf.text.Document;
+import com.itextpdf.text.DocumentException;
+import com.itextpdf.text.pdf.PdfCopy;
+import com.itextpdf.text.pdf.PdfReader;
 import com.uas.report.core.exception.SystemError;
 import com.uas.report.service.PrintService;
 import com.uas.report.service.ResourceService;
@@ -97,13 +101,39 @@ public class PrintServiceImpl implements PrintService {
 			fos.flush();
 			logger.info("Generated pdf file: " + pdfFile.getPath());
 			fos.close();
-		} catch (IOException e) {
+			// 同时生成分页的pdf
+			writePagedPdfFiles(pdfFile.getPath());
+		} catch (IOException | DocumentException e) {
 			e.printStackTrace();
 			throw new SystemError(e.getMessage());
 		}
 		return pdfFilePath;
 	}
 
+	/**
+	 * 将给定的pdf文件生成多个分页的文件
+	 * 
+	 * @param pdfFilePath
+	 *            指定的pdf文件路径
+	 * @throws IOException
+	 * @throws DocumentException
+	 */
+	private void writePagedPdfFiles(String pdfFilePath) throws IOException, DocumentException {
+		PdfReader pdfReader = new PdfReader(pdfFilePath);
+		for (int i = 1; i <= pdfReader.getNumberOfPages(); i++) {
+			Document document = new Document();
+			FileOutputStream fileOutputStream = new FileOutputStream(pdfFilePath.replace(".pdf", "_" + i + ".pdf"));
+			PdfCopy pdfCopy = new PdfCopy(document, fileOutputStream);
+			document.open();
+			// 原pdf文件的每一页生成新的pdf
+			pdfCopy.addPage(pdfCopy.getImportedPage(pdfReader, i));
+			pdfCopy.close();
+			// 不关闭，生成的pdf无法正常打开
+			document.close();
+			fileOutputStream.close();
+		}
+	}
+
 	/**
 	 * 输出报表的数据
 	 *