Index: forgon-tools/src/main/java/com/forgon/tools/conversion/PdfToImageUtil.java
===================================================================
diff -u -r24096 -r41098
--- forgon-tools/src/main/java/com/forgon/tools/conversion/PdfToImageUtil.java	(.../PdfToImageUtil.java)	(revision 24096)
+++ forgon-tools/src/main/java/com/forgon/tools/conversion/PdfToImageUtil.java	(.../PdfToImageUtil.java)	(revision 41098)
@@ -4,10 +4,13 @@
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
-import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
 
 import javax.imageio.ImageIO;
 import org.apache.pdfbox.pdmodel.PDDocument;
@@ -75,38 +78,95 @@
 	  * @return 创建图片的路径集合
 	  * @throws IOException
 	  */
-    public static List<String> pdfToImagePath(String filePath) throws IOException{
-        List<String> list = new ArrayList<>();
-        String fileDirectory = filePath.substring(0,filePath.lastIndexOf("."));//获取去除后缀的文件路径
-        String imagePath;
-        PDDocument pdDocument = null;
-        File file = new File(filePath);
-        try {
-            File f = new File(fileDirectory);
-            if(!f.exists()){
-                f.mkdir();
-            }
-             pdDocument = PDDocument.load(file);
-            PDFRenderer renderer = new PDFRenderer(pdDocument);
-            int pageCount = pdDocument.getNumberOfPages();
-            for(int i=0; i<pageCount; i++){
-                // 方式1,第二个参数是设置缩放比(即像素)
-                // BufferedImage image = renderer.renderImageWithDPI(i, 296);
-                // 方式2,第二个参数是设置缩放比(即像素)
-                BufferedImage image = renderer.renderImage(i, 1.25f);  //第二个参数越大生成图片分辨率越高，转换时间也就越长
-                imagePath = fileDirectory + "/"+i + ".jpg";
-                ImageIO.write(image, "PNG", new File(imagePath));
-                list.add(imagePath);
-            }
-        } catch (IOException e) {
-            e.printStackTrace();
-        } finally {
-		  if (pdDocument != null) {
-			  pdDocument.close();
-		  }
+	 public static List<String> pdfToImagePath(String filePath) throws IOException{
+		 List<String> list = new ArrayList<>();
+		 String fileDirectory = filePath.substring(0,filePath.lastIndexOf("."));//获取去除后缀的文件路径
+		 PDDocument pdDocument = null;
+		 File file = new File(filePath);
+		 ExecutorService pool = null;
+		 List<Future<String>> futureLst = new ArrayList<Future<String>>();
+		 try {
+			 File f = new File(fileDirectory);
+			 if(!f.exists()){
+				 f.mkdir();
+			 }
+			 pdDocument = PDDocument.load(file);
+			 int pageCount = pdDocument.getNumberOfPages();
+			 pool = Executors.newFixedThreadPool(5);
+			 for(int i=0; i<pageCount; i++){
+				 int finalPage = i;
+				 Future<String> future = pool.submit(new Callable<String>() {
+					 @Override
+					 public String call() throws Exception {
+						 PDDocument pdDocumentThread = null;
+						 try {
+							 pdDocumentThread = PDDocument.load(file);
+							 PDFRenderer renderer = new PDFRenderer(pdDocumentThread);
+							 //BufferedImage image = renderer.renderImageWithDPI(finalPage, 300); //300打印级
+							 BufferedImage image = renderer.renderImageWithDPI(finalPage, 150); //150屏幕预览
+							 String imagePath = fileDirectory + "/"+ finalPage + ".jpg";
+							 ImageIO.write(image, "PNG", new File(imagePath));
+							 return imagePath;
+						 } catch (Exception e) {
+							 e.printStackTrace();
+						 } finally {
+							 if (pdDocumentThread != null) {
+								 pdDocumentThread.close();
+							 }
+						 }
+						 return null;
+					 }
+				 });
+				 futureLst.add(future);
+			 }
+			 for (Future<String> future : futureLst) {
+				 list.add(future.get());
+			 }
+		 } catch (Exception e) {
+			 e.printStackTrace();
+		 } finally {
+			 if (pdDocument != null) {
+				 pdDocument.close();
+			 }
+			 if(pool != null){
+				 pool.shutdown();
+			 }
 		 }
-        return list;
-    }
+		 return list;
+	 }
+
+	 public static List<String> pdfToImagePath_old(String filePath) throws IOException{
+		 List<String> list = new ArrayList<>();
+		 String fileDirectory = filePath.substring(0,filePath.lastIndexOf("."));//获取去除后缀的文件路径
+		 String imagePath;
+		 PDDocument pdDocument = null;
+		 File file = new File(filePath);
+		 try {
+			 File f = new File(fileDirectory);
+			 if(!f.exists()){
+				 f.mkdir();
+			 }
+			 pdDocument = PDDocument.load(file);
+			 PDFRenderer renderer = new PDFRenderer(pdDocument);
+			 int pageCount = pdDocument.getNumberOfPages();
+			 for(int i=0; i<pageCount; i++){
+				 // 方式1,第二个参数是设置缩放比(即像素)
+				 // BufferedImage image = renderer.renderImageWithDPI(i, 296);
+				 // 方式2,第二个参数是设置缩放比(即像素)
+				 BufferedImage image = renderer.renderImage(i, 1.25f);  //第二个参数越大生成图片分辨率越高，转换时间也就越长
+				 imagePath = fileDirectory + "/"+i + ".jpg";
+				 ImageIO.write(image, "PNG", new File(imagePath));
+				 list.add(imagePath);
+			 }
+		 } catch (IOException e) {
+			 e.printStackTrace();
+		 } finally {
+			 if (pdDocument != null) {
+				 pdDocument.close();
+			 }
+		 }
+		 return list;
+	 }
 	    
 		private static boolean createDirectory(String folder) {
 			File dir = new File(folder);