!139 优化CAD 释放资源方法

Merge pull request !139 from 高雄/master

server/src/main/java/cn/keking/service/FileHandlerService.java

@@ -296,7 +296,7 @@ public class FileHandlerService {
      * @param outputFilePath pdf输出文件路径
      * @return 转换是否成功
      */
-    public boolean cadToPdf(String inputFilePath, String outputFilePath) {
+    public String cadToPdf(String inputFilePath, String outputFilePath)  throws Exception  {
         File outputFile = new File(outputFilePath);
         LoadOptions opts = new LoadOptions();
         opts.setSpecifiedEncoding(CodePages.SimpChinese);
@@ -310,21 +310,22 @@ public class FileHandlerService {
         cadRasterizationOptions.setDrawType(1);
         PdfOptions pdfOptions = new PdfOptions();
         pdfOptions.setVectorRasterizationOptions(cadRasterizationOptions);
-        OutputStream stream;
+        OutputStream stream = null;
         try {
             stream = new FileOutputStream(outputFile);
             cadImage.save(stream, pdfOptions);
-            stream.close();
-            cadImage.close();
-            return true;
         } catch (IOException e) {
             logger.error("PDFFileNotFoundException，inputFilePath：{}", inputFilePath, e);
+            return "null";
         } finally {
+            if (stream != null) {   //关闭
+                stream.close();
+            }
             if (cadImage != null) {   //关闭
                 cadImage.close();
             }
         }
-        return false;
+        return "true";
     }
     /**
      *

server/src/main/java/cn/keking/service/impl/CadFilePreviewImpl.java

@@ -12,6 +12,8 @@ import org.springframework.stereotype.Service;
 import org.springframework.ui.Model;
 import org.springframework.util.StringUtils;
 
+import java.util.List;
+
 import static cn.keking.service.impl.OfficeFilePreviewImpl.getPreviewType;
 
 /**
@@ -51,10 +53,15 @@ public class CadFilePreviewImpl implements FilePreview {
                 return otherFilePreview.notSupportedFile(model, fileAttribute, response.getMsg());
             }
             filePath = response.getContent();
+            String imageUrls = null;
             if (StringUtils.hasText(outFilePath)) {
-                boolean convertResult = fileHandlerService.cadToPdf(filePath, outFilePath);
-                if (!convertResult) {
-                    return otherFilePreview.notSupportedFile(model, fileAttribute, "cad文件转换异常，请联系管理员");
+                try {
+                    imageUrls =  fileHandlerService.cadToPdf(filePath, outFilePath);
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+                if (imageUrls == null ) {
+                    return otherFilePreview.notSupportedFile(model, fileAttribute, "office转图片异常，请联系管理员");
                 }
                 //是否保留CAD源文件
                 if( ConfigConstants.getDeleteSourceFile()) {