JAVA--将二进制流转换成图片文件

来源：互联网发布：st单片机代理编辑：程序博客网时间：2024/06/10 06:26
import java.io.ByteArrayInputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;/** * 将二进制流转换成图片文件 * @author 晚风工作室 www.soservers.com * */public class ImgErToFileUtil {/** * 将接收的字符串转换成图片保存 * @param imgStr 二进制流转换的字符串 * @param imgPath 图片的保存路径 * @param imgName 图片的名称 * @return  * 1：保存正常 * 0：保存失败 */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 {// 将字符串转换成二进制，用于显示图片  // 将上面生成的图片格式字符串 imgStr，还原成图片显示  byte[] imgByte = hex2byte( imgStr );  InputStream in = new ByteArrayInputStream(imgByte);File file=new File(imgPath,imgName);//可以是任何图片格式.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;}/** * 将二进制转换成图片保存 * @param imgStr 二进制流转换的字符串 * @param imgPath 图片的保存路径 * @param imgName 图片的名称 * @return  * 1：保存正常 * 0：保存失败 */public static int saveToImgByBytes(File imgFile,String imgPath,String imgName){int stateInt = 1;if(imgFile.length() > 0){try {File file=new File(imgPath,imgName);//可以是任何图片格式.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;}/** * 二进制转字符串 * @param b * @return */public static String byte2hex(byte[] b) // 二进制转字符串{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();}/** * 字符串转二进制 * @param str 要转换的字符串 * @return  转换后的二进制数组 */public static byte[] hex2byte(String str) { // 字符串转二进制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;}}}
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