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圖片轉(zhuǎn)字符串

事例1：

package com.apexsoft.mobile.utils;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import sun.misc.BASE64Decoder;

import sun.misc.BASE64Encoder;

public class ImgToString {

public static String getImageStr(String imgFile) {// 將圖片文件轉(zhuǎn)化為字節(jié)數(shù)組字符串，并對(duì)其進(jìn)行Base64編碼處理

// String imgFile = "d:\\111.jpg";// 待處理的圖片

InputStream in = null;

byte[] data = null;

// 讀取圖片字節(jié)數(shù)組

try {

in = new FileInputStream(imgFile);

data = new byte[in.available()];

in.read(data);

in.close();

} catch (IOException e) {

e.printStackTrace();

}

// 對(duì)字節(jié)數(shù)組Base64編碼

BASE64Encoder encoder = new BASE64Encoder();

return encoder.encode(data);// 返回Base64編碼過的字節(jié)數(shù)組字符串

}

/**

* 將字符串轉(zhuǎn)為圖片

*

* @param imgStr

* @return

*/

public static boolean generateImage(String imgStr, String imgFile)

throws Exception {// 對(duì)字節(jié)數(shù)組字符串進(jìn)行Base64解碼并生成圖片

if (imgStr == null) // 圖像數(shù)據(jù)為空

return false;

BASE64Decoder decoder = new BASE64Decoder();

try {

// Base64解碼

byte[] b = decoder.decodeBuffer(imgStr);

for (int i = 0; i < b.length; ++i) {

if (b[i] < 0) {// 調(diào)整異常數(shù)據(jù)

b[i] += 256;

}

// 生成jpeg圖片

String imgFilePath = imgFile;// 新生成的圖片

OutputStream out = new FileOutputStream(imgFilePath);

out.write(b);

out.flush();

out.close();

return true;

} catch (Exception e) {

throw e;

}

public static void main(String[]args){

String imgStr = ImgToString.getImageStr("C:\\Users\\think\\Pictures\\打開Intenet選項(xiàng)1.jpg");

System.out.println(imgStr);

try {

ImgToString.generateImage(imgStr, "D:\\3.jpg");

} catch (Exception e) {

e.printStackTrace();

}

事例2：

package com.apexsoft.mobile.utils;

import java.awt.image.BufferedImage;

import java.io.BufferedInputStream;

import java.io.ByteArrayOutputStream;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.RandomAccessFile;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLConnection;

import javax.imageio.ImageIO;

public class ImgToString2 {

/**

* @Title getImgeHexString

* @Description 網(wǎng)絡(luò)圖片轉(zhuǎn)換成二進(jìn)制字符串

* @param URLName 網(wǎng)絡(luò)圖片地址

* @param type 圖片類型

* @return String 轉(zhuǎn)換結(jié)果

* @throws

*/

/*

public static String getImgeHexString(String URLName,String type) {

String res = null;

try {

int HttpResult = 0; // 服務(wù)器返回的狀態(tài)

URL url = new URL(URLName); // 創(chuàng)建URL

URLConnection urlconn = url.openConnection(); // 試圖連接并取得返回狀態(tài)碼

urlconn.connect();

HttpURLConnection httpconn = (HttpURLConnection) urlconn;

HttpResult = httpconn.getResponseCode();

System.out.println(HttpResult);

if (HttpResult != HttpURLConnection.HTTP_OK) // 不等于HTTP_OK則連接不成功

System.out.print("fail");

else {

BufferedInputStream bis = new BufferedInputStream(urlconn.getInputStream());

BufferedImage bm = ImageIO.read(bis);

ByteArrayOutputStream bos = new ByteArrayOutputStream();

ImageIO.write(bm, type, bos);

bos.flush();

byte[] data = bos.toByteArray();

res = byte2hex(data);

bos.close();

}

} catch (Exception e) {

e.printStackTrace();

}

return res;

}*/

public static void main(String[]args){

String imgStr = ImgToString2.getImgeHexString("C:\\Users\\think\\Pictures\\打開Intenet選項(xiàng)1.jpg");

System.out.println(imgStr);

}

public static String getImgeHexString(String imgFile) {

String res = null;

try {

InputStream in = null;

byte[] data = null;

// 讀取圖片字節(jié)數(shù)組

in = new FileInputStream(imgFile);

data = new byte[in.available()];

in.read(data);

in.close();

BufferedInputStream bis = new BufferedInputStream(in);

BufferedImage bm = ImageIO.read(bis);

ByteArrayOutputStream bos = new ByteArrayOutputStream();

ImageIO.write(bm, "jpg", bos);

bos.flush();

data = bos.toByteArray();

res = byte2hex(data);

bos.close();

} catch (Exception e) {

e.printStackTrace();

}

return res;

}

/**

* @title 根據(jù)二進(jìn)制字符串生成圖片

* @param data 生成圖片的二進(jìn)制字符串

* @param fileName 圖片名稱(完整路徑)

* @param type 圖片類型

* @return

*/

public static void saveImage(String data, String fileName,String type) {

BufferedImage image = new BufferedImage(300, 300,BufferedImage.TYPE_BYTE_BINARY);

ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream();

try {

ImageIO.write(image, type, byteOutputStream);

// byte[] date = byteOutputStream.toByteArray();

byte[] bytes = hex2byte(data);

System.out.println("path:" + fileName);

RandomAccessFile file = new RandomAccessFile(fileName, "rw");

file.write(bytes);

file.close();

} catch (IOException e) {

e.printStackTrace();

}

/**

* 反格式化byte

*

* @param s

* @return

*/

public static byte[] hex2byte(String s) {

byte[] src = s.toLowerCase().getBytes();

byte[] ret = new byte[src.length / 2];

for (int i = 0; i < src.length; i += 2) {

byte hi = src[i];

byte low = src[i + 1];

hi = (byte) ((hi >= 'a' && hi <= 'f') ? 0x0a + (hi - 'a')

: hi - '0');

low = (byte) ((low >= 'a' && low <= 'f') ? 0x0a + (low - 'a')

: low - '0');

ret[i / 2] = (byte) (hi << 4 | low);

}

return ret;

}

/**

* 格式化byte

*

* @param b

* @return

*/

public static String byte2hex(byte[] b) {

char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A',

'B', 'C', 'D', 'E', 'F' };

char[] out = new char[b.length * 2];

for (int i = 0; i < b.length; i++) {

byte c = b[i];

out[i * 2] = Digit[(c >>> 4) & 0X0F];

out[i * 2 + 1] = Digit[c & 0X0F];

}

return new String(out);

}

歡迎大家訪問我的個(gè)人網(wǎng)站萌萌的IT人

posted on 2014-08-05 11:30 一堣而安閱讀(1556) 評(píng)論(0) 編輯收藏所屬分類: java

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