小说软件开发,java获取文本文件的编码格式
小说软件开发,java获取文本文件的编码格式实现的相关代码
/**
* 获取文件的编码格式
* @param file
* @return
*/
public String GetCharset(File file) {
String charset = "GBK";
byte[] first3Bytes = new byte[3];
try {
boolean checked = false;
//BufferedInputStream bis = new BufferedInputStream(
//new FileInputStream(file));
//bis.mark(0);
//int read = bis.read(first3Bytes, 0, 3);
InputStream is = new FileInputStream(file);
int read = is.read(first3Bytes, 0, 3);
if (read == -1)
return charset;
//Log.i(TAG,"[GetCharset]first3Bytes[0]:"+first3Bytes[0]+", first3Bytes[1]:"+first3Bytes[1]+",first3Bytes[2]:"+first3Bytes[2]);
if (first3Bytes[0] == (byte) 0xFF && first3Bytes[1] == (byte) 0xFE) {
charset = "UTF-16LE";
checked = true;
} else if (first3Bytes[0] == (byte) 0xFE
&& first3Bytes[1] == (byte) 0xFF) {
charset = "UTF-16BE";
checked = true;
} else if (first3Bytes[0] == (byte) 0xEF
&& first3Bytes[1] == (byte) 0xBB
&& first3Bytes[2] == (byte) 0xBF) {
charset = "UTF-8";
checked = true;
}else if (first3Bytes[0] == (byte) 0xA
&& first3Bytes[1] == (byte) 0x5B
&& first3Bytes[2] == (byte) 0x30) {
charset = "UTF-8";
checked = true;
}else if (first3Bytes[0] == (byte) 0xD
&& first3Bytes[1] == (byte) 0xA
&& first3Bytes[2] == (byte) 0x5B) {
charset = "GBK";
checked = true;
}else if (first3Bytes[0] == (byte) 0x5B
&& first3Bytes[1] == (byte) 0x54
&& first3Bytes[2] == (byte) 0x49) {
charset = "windows-1251";
checked = true;
}
//bis.reset();
InputStream istmp = new FileInputStream(file);
if (!checked) {
int loc = 0;
while ((read = istmp.read()) != -1) {
loc++;
if (read >= 0xF0)
break;
if (0x80 <= read && read <= 0xBF)
break;
if (0xC0 <= read && read <= 0xDF) {
read = istmp.read();
if (0x80 <= read && read <= 0xBF)
continue;
else
break;
} else if (0xE0 <= read && read <= 0xEF) {
read = istmp.read();
if (0x80 <= read && read <= 0xBF) {
read = istmp.read();
if (0x80 <= read && read <= 0xBF) {
charset = "UTF-8";
break;
} else
break;
} else
break;
}
}
}
is.close();
istmp.close();
} catch (Exception e) {
e.printStackTrace();
}
return charset;
}
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