com.tmsps.ne4spring.utils.ImageUtil Maven / Gradle / Ivy
/**
*
*/
package com.tmsps.ne4spring.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
/**
*
* @author zhangwei
*
*/
public class ImageUtil {
@SuppressWarnings("resource")
public byte[] getImageBinary(String filePath) throws IOException {
File file = new File(filePath);
FileInputStream fis;
fis = new FileInputStream(file);
byte[] b;
b = new byte[fis.available()];
fis.read(b);
return b;
}
public String getImageBinaryString(String filePath) throws IOException {
return byte2hex(getImageBinary(filePath));
}
public void saveImageBinary(byte[] fileData, String saveFilePath)
throws IOException {
File file = new File(saveFilePath);// 把字节数组的图片写到另一个地方
FileOutputStream fos = new FileOutputStream(file);
fos.write(fileData);
fos.flush();
fos.close();
}
public void saveImageBinaryString(String fileData, String saveFilePath)
throws IOException {
saveImageBinary(hex2byte(fileData), saveFilePath);
}
/**
* 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;
}
}
}