图片转字符串

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) {// 将图片文件转化为字节数组字符串，并对其进行Base64编码处理

// String imgFile = "d:\\111.jpg";// 待处理的图片

InputStream in = null;

byte[] data = null;

// 读取图片字节数组

try {

in = new FileInputStream(imgFile);

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

in.read(data);

in.close();

} catch (IOException e) {

e.printStackTrace();

}

// 对字节数组Base64编码

BASE64Encoder encoder = new BASE64Encoder();

return encoder.encode(data);// 返回Base64编码过的字节数组字符串

}

/**

* 将字符串转为图片

* @param imgStr

* @return

public static boolean generateImage(String imgStr, String imgFile)

throws Exception {// 对字节数组字符串进行Base64解码并生成图片

if (imgStr == null) // 图像数据为空

return false;

BASE64Decoder decoder = new BASE64Decoder();

try {

// Base64解码

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

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

if (b[i] < 0) {// 调整异常数据

b[i] += 256;

}

// 生成jpeg图片

String imgFilePath = imgFile;// 新生成的图片

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\\打开Intenet选项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 网络图片转换成二进制字符串

* @param URLName 网络图片地址

* @param type 图片类型

* @return String 转换结果

* @throws

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

String res = null;

try {

int HttpResult = 0; // 服务器返回的状态

URL url = new URL(URLName); // 创建URL

URLConnection urlconn = url.openConnection(); // 试图连接并取得返回状态码

urlconn.connect();

HttpURLConnection httpconn = (HttpURLConnection) urlconn;

HttpResult = httpconn.getResponseCode();

System.out.println(HttpResult);

if (HttpResult != HttpURLConnection.HTTP_OK) // 不等于HTTP_OK则连接不成功

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\\打开Intenet选项1.jpg");

System.out.println(imgStr);

}

public static String getImgeHexString(String imgFile) {

String res = null;

try {

InputStream in = null;

byte[] data = null;

// 读取图片字节数组

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 根据二进制字符串生成图片

* @param data 生成图片的二进制字符串

* @param fileName 图片名称(完整路径)

* @param type 图片类型

* @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);

}

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posted on 2014-08-05 11:30 一堣而安阅读(1538) 评论(0) 编辑收藏所属分类: java

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图片转字符串

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