package cn.itsource.pss.service;

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);
System.out.println(imgByte);
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
 * 将图片转换成二进制保存
 * @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;
}
}
}