import java.io.ByteArrayInputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; /** * 將二進制流轉換成圖片文件 * * */ public class ImgErToFileUtil { /** * 將接收的字符串轉換成圖片保存 * @param imgStr 二進制流轉換的字符串 * @param imgPath 圖片的保存路徑 * @param imgName 圖片的名稱 * @return * 1:保存正常 * 0:保存失敗 */ public static int saveToImgByStr(String imgStr,String imgPath,String imgName){ try { System.out.println("===imgStr.length()====>" + imgStr.length() + "=====imgStr=====>" + imgStr); } catch (Exception e) { e.printStackTrace(); } int stateInt = 1; if(imgStr != null && imgStr.length() > 0){ try { // 將字符串轉換成二進制,用於顯示圖片 // 將上面生成的圖片格式字符串 imgStr,還原成圖片顯示 byte[] imgByte = hex2byte( imgStr ); InputStream in = new ByteArrayInputStream(imgByte); File file=new File(imgPath,imgName);//能夠是任何圖片格式.jpg,.png等 FileOutputStream fos=new FileOutputStream(file); byte[] b = new byte[1024]; int nRead = 0; while ((nRead = in.read(b)) != -1) { fos.write(b, 0, nRead); } fos.flush(); fos.close(); in.close(); } catch (Exception e) { stateInt = 0; e.printStackTrace(); } finally { } } return stateInt; } /** * 將二進制轉換成圖片保存 * @param imgStr 二進制流轉換的字符串 * @param imgPath 圖片的保存路徑 * @param imgName 圖片的名稱 * @return * 1:保存正常 * 0:保存失敗 */ public static int saveToImgByBytes(File imgFile,String imgPath,String imgName){ int stateInt = 1; if(imgFile.length() > 0){ try { File file=new File(imgPath,imgName);//能夠是任何圖片格式.jpg,.png等 FileOutputStream fos=new FileOutputStream(file); FileInputStream fis = new FileInputStream(imgFile); byte[] b = new byte[1024]; int nRead = 0; while ((nRead = fis.read(b)) != -1) { fos.write(b, 0, nRead); } fos.flush(); fos.close(); fis.close(); } catch (Exception e) { stateInt = 0; e.printStackTrace(); } finally { } } return stateInt; } /** * 二進制轉字符串 * @param b * @return */ public static String byte2hex(byte[] b) // 二進制轉字符串 { StringBuffer sb = new StringBuffer(); String stmp = ""; for (int n = 0; n < b.length; n++) { stmp = Integer.toHexString(b[n] & 0XFF); if (stmp.length() == 1) { sb.append("0" + stmp); } else { sb.append(stmp); } } return sb.toString(); } /** * 字符串轉二進制 * @param str 要轉換的字符串 * @return 轉換後的二進制數組 */ public static byte[] hex2byte(String str) { // 字符串轉二進制 if (str == null) return null; str = str.trim(); int len = str.length(); if (len == 0 || len % 2 == 1) return null; byte[] b = new byte[len / 2]; try { for (int i = 0; i < str.length(); i += 2) { b[i / 2] = (byte) Integer .decode("0X" + str.substring(i, i + 2)).intValue(); } return b; } catch (Exception e) { return null; } } } 來源:轉載