将二进制流转换成图片文件

importjava.io.ByteArrayInputStream;

importjava.io.File;

importjava.io.FileInputStream;

importjava.io.FileOutputStream;

importjava.io.InputStream;

 

/**

 * 将二进制流转换成图片文件

 * @author 晚风工作室 www.soservers.com

 *

 */

 

publicclass 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

     */

    publicstatic int saveToImgByStr(String imgStr,String imgPath,String imgName){

try{

    System.out.println("===imgStr.length()====>"+ imgStr.length()

            +"=====imgStr=====>"+ imgStr);

}catch(Exception e) {

    e.printStackTrace();

}

        intstateInt = 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 = newByteArrayInputStream(imgByte);

     

                File file=newFile(imgPath,imgName);//可以是任何图片格式.jpg,.png等

                FileOutputStream fos=newFileOutputStream(file);

                   

                byte[] b = newbyte[1024];

                intnRead = 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{

            }

        }

        returnstateInt;

    }

     

    /**

     * 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

     */

    publicstatic int saveToImgByBytes(File imgFile,String imgPath,String imgName){

 

        intstateInt = 1;

        if(imgFile.length() > 0){

            try{

                File file=newFile(imgPath,imgName);//可以是任何图片格式.jpg,.png等

                FileOutputStream fos=newFileOutputStream(file);

                 

                FileInputStream fis = newFileInputStream(imgFile);

                   

                byte[] b = newbyte[1024];

                intnRead = 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{

            }

        }

        returnstateInt;

    }

 

    /**

     * 二进制转字符串

     * @param b

     * @return

     */

    publicstatic String byte2hex(byte[] b) // 二进制转字符串

    {

        StringBuffer sb = newStringBuffer();

        String stmp = "";

        for(intn = 0; n < b.length; n++) {

            stmp = Integer.toHexString(b[n] & 0XFF);

            if(stmp.length() == 1) {

                sb.append("0"+ stmp);

            }else{

                sb.append(stmp);

            }

 

        }

        returnsb.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

     */

    publicstatic byte[] hex2byte(String str) { // 字符串转二进制

        if(str == null)

            returnnull;

        str = str.trim();

        intlen = str.length();

        if(len == 0|| len % 2== 1)

            returnnull;

        byte[] b = newbyte[len / 2];

        try{

            for(inti = 0; i < str.length(); i += 2) {

                b[i / 2] = (byte) Integer

                        .decode("0X"+ str.substring(i, i + 2)).intValue();

            }

            returnb;

        }catch(Exception e) {

            returnnull;

        }

    }

     

}