Java图⽚与byte数组互相转换Java 图⽚与byte数组互相转换
//图⽚到byte数组
public byte[] image2byte(String path){
byte[] data = null;
java数组字符串转数组FileImageInputStream input = null;
try {
input = new FileImageInputStream(new File(path));
ByteArrayOutputStream output = new ByteArrayOutputStream();
byte[] buf = new byte[1024];
int numBytesRead = 0;
while ((numBytesRead = ad(buf)) != -1) {
output.write(buf, 0, numBytesRead);
}
data = ByteArray();
output.close();
input.close();
}
catch (FileNotFoundException ex1) {
ex1.printStackTrace();
}
catch (IOException ex1) {
ex1.printStackTrace();
}
return data;
}
//byte数组到图⽚
public void byte2image(byte[] data,String path){
if(data.length<3||path.equals("")) return;
try{
FileImageOutputStream imageOutput = new FileImageOutputStream(new File(path));
imageOutput.write(data, 0, data.length);
imageOutput.close();
System.out.println("Make Picture success,Please find image in " + path);
} catch(Exception ex) {
System.out.println("Exception: " + ex);
ex.printStackTrace();
}
}
//byte数组到16进制字符串
public String byte2string(byte[] data){
if(data==null||data.length<=1) return "0x";
if(data.length>200000) return "0x";
StringBuffer sb = new StringBuffer();
int buf[] = new int[data.length];
/
/byte数组转化成⼗进制
for(int k=0;k<data.length;k++){
buf[k] = data[k]<0?(data[k]+256):(data[k]);
}
//⼗进制转化成⼗六进制
for(int k=0;k<buf.length;k++){
if(buf[k]<16) sb.append("0"+HexString(buf[k]));
else sb.HexString(buf[k]));
}
return "0x"+sb.toString().toUpperCase();
}

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