文件切分

service-iot/service-iot-biz/src/main/java/com/usky/iot/service/impl/DmpSoftwareUpgradeServiceImpl.java

@@ -71,15 +71,21 @@ public class DmpSoftwareUpgradeServiceImpl extends AbstractCrudService<DmpSoftwa
             inputStream = new ByteArrayInputStream(byteArr);
             //创建规定大小的byte数组
             byte[] b = new byte[num];
-            int len = 0;
             //name为以后的小文件命名做准备
             int name = 0;
             //遍历将大文件读入byte数组中，当byte数组读满后写入对应的小文件中
-            while ((len = inputStream.read(b)) != -1) {
-                int chk = 0x0000;
-                for(int i=0;i<len;i++){
-                    chk += b[i]&0x00ff;
+
+            int len,crc,cur = 0;
+            while((len = inputStream.read(b))!=-1) {
+                crc = 0;
+                for(int i=0;i<len;i++) {
+                    String str = Integer.toHexString(b[i]&0x00ff);
+                    if(str.length()==1)
+                        str = "0"+str;
+                    System.out.print(str+" ");
+                    crc = (crc + (b[i]&0x00ff))&0xffff;
                 }
+
                 DmpSoftwareSubpackage dmpSoftwareSubpackage = new DmpSoftwareSubpackage();
                 dmpSoftwareSubpackage.setUpgradeId(dmpSoftwareUpgrade.getId());
                 dmpSoftwareSubpackage.setSubpackageNumber(name);
@@ -88,10 +94,28 @@ public class DmpSoftwareUpgradeServiceImpl extends AbstractCrudService<DmpSoftwa
                     dmpSoftwareSubpackage.setApplyPackage(subBytes(b,0,len));
                 }
                 dmpSoftwareSubpackage.setSubpackageLength(String.valueOf(len));
-                dmpSoftwareSubpackage.setCheckCode(String.format("%04x", chk& 0x0000ffff));
+                dmpSoftwareSubpackage.setCheckCode(Integer.toHexString(crc));
                 list.add(dmpSoftwareSubpackage);
-                name++;
+                System.out.println("\n"+cur+") len:"+len+"\tcrc:"+Integer.toHexString(crc));
+                cur++;
             }
+//            while ((len = inputStream.read(b)) != -1) {
+//                int chk = 0x0000;
+//                for(int i=0;i<len;i++){
+//                    chk += b[i]&0x00ff;
+//                }
+//                DmpSoftwareSubpackage dmpSoftwareSubpackage = new DmpSoftwareSubpackage();
+//                dmpSoftwareSubpackage.setUpgradeId(dmpSoftwareUpgrade.getId());
+//                dmpSoftwareSubpackage.setSubpackageNumber(name);
+//                dmpSoftwareSubpackage.setApplyPackage(b);
+//                if (len < 1024){
+//                    dmpSoftwareSubpackage.setApplyPackage(subBytes(b,0,len));
+//                }
+//                dmpSoftwareSubpackage.setSubpackageLength(String.valueOf(len));
+//                dmpSoftwareSubpackage.setCheckCode(String.format("%04x", chk& 0x0000ffff));
+//                list.add(dmpSoftwareSubpackage);
+//                name++;
+//            }
         } catch (Exception e) {
             e.printStackTrace();
         } finally {