将二进制流转换成图片文件

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;

        }

    }

     

}