java 如何判断txt的编码字符集
最近在做一个文本阅读器，显示时需要获得本地导入的txt的编码字符集，网上搜了，都不行，还在搜，请高手给个成熟的方法，谢谢了。在线狂等中.
我的代码(不可用)：
private static void judgeTextCode(String strFilePath) {
FileInputStream fis = null;
try {
fis = new FileInputStream(strFilePath);
int a = fis.read();
int b = fis.read();
if(a==0xFF&&b==0xFE) {
System.out.println("----------Unicode------");
}
else if(a==0xFE&&b==0xFF) {
System.out.println("----------UTF-16BE------");
}
else if(a==0xEF&&b==0xBB) {
System.out.println("----------UTF-8------");
} else {
System.out.println("----------GBK------");
}
} catch(Exception e) {
e.printStackTrace();
} finally {
try {
if(fis != null) {
fis.close();
}
} catch(Exception e) {
e.printStackTrace();
}
}
} java
[解决办法]
public static void main(String[] args) {
try {
String charset = getCharset(new File("c:\\2.txt"));
System.out.println(charset);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static String toHex(byte[] byteArray) {
int i;
StringBuffer buf = new StringBuffer("");
int len = byteArray.length;
for (int offset = 0; offset < len; offset++) {
i = byteArray[offset];
if (i < 0)
i += 256;
if (i < 16)
buf.append("0");
buf.append(Integer.toHexString(i));
}
return buf.toString().toUpperCase();
}
private static String getCharset(File fileName) throws IOException {
BufferedInputStream bin = new BufferedInputStream(new FileInputStream(fileName));
byte[] b = new byte[10];
bin.read(b, 0, b.length);
String first = toHex(b);
//这里可以看到各种编码的前几个字符是什么，gbk编码前面没有多余的
String code = null;
if (first.startsWith("EFBBBF")) {
code = "UTF-8";
} else if (first.startsWith("FEFF00")) {
code = "UTF-16BE";
} else if (first.startsWith("FFFE")) {
code = "Unicode";
} else if (first.startsWith("FFFE")) {
code = "Unicode";
} else {
code = "GBK";
}
return code;
}
