java后台图片大小kb查看_java根据图片地址获取到图片的大小，单位kb或者Mb

/**

* byte(字节)根据长度转成kb(千字节)和mb(兆字节)

*

* &＃64;param bytes

* &＃64;return

*/

public static String bytes2kb(long bytes) {

BigDecimal filesize &＃61; new BigDecimal(bytes);

BigDecimal megabyte &＃61; new BigDecimal(1024 * 1024);

float returnValue &＃61; filesize.divide(megabyte, 2, BigDecimal.ROUND_UP)

.floatValue();

if (returnValue > 1)

return (returnValue &＃43; "MB");

BigDecimal kilobyte &＃61; new BigDecimal(1024);

returnValue &＃61; filesize.divide(kilobyte, 2, BigDecimal.ROUND_UP)

.floatValue();

return (returnValue &＃43; "KB");

}

/**

* &＃64;Title: pathSize

*&＃64;param imgPath

*&＃64;return  根据图片地址返回图片大小kb或者 Mb

* &＃64;return String

* &＃64;throws

* &＃64;add (default no)

*/

public String pathSize(String imgPath) {

File file &＃61; new File(imgPath);

FileInputStream fis;

int fileLen &＃61; 0;

try {

fis &＃61; new FileInputStream(file);

fileLen &＃61; fis.available();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return bytes2kb(fileLen);

}