我正在尝试读取UTF8文本文件,然后使用应返回true的equals()进行文本比较。但它没有,因为getBytes()返回不同的值。
这是一个最小的例子:
public static void main(String[] args) throws Exception {
System.out.println(Charset.defaultCharset()); // UTF-8
InputStream is = new FileInputStream("./myUTF8File.txt");
BufferedReader in = new BufferedReader(new InputStreamReader(is, "UTF8"));
String line;
while ((line = in.readLine()) != null) {
System.out.print(line); // mouseover
byte[] bytes = line.getBytes(); // [-17, -69, -65, 109, 111, 117, 115, 101, 111, 118, 101, 114]
String str = "mouseover";
byte[] bytesStr = str.getBytes(); // [109, 111, 117, 115, 101, 111, 118, 101, 114]
if (line.equals(str)) { // false
System.out.println("equal");
}
}
}
我希望String在line.readLine()处转换为UTF-16,并且equals返回true。无法弄清楚为什么。
答案 0 :(得分:3)
文件的开头字节:
-17, -69, -65
是 BOM: Byte Order Mark 的字节...数据的某些相关性:
[-17, -69, -65, 109, 111, 117, 115, 101, 111, 118, 101, 114]
[109, 111, 117, 115, 101, 111, 118, 101, 114]
此外,字符集的正确名称为 "UTF-8"
- 请注意短划线
BufferedReader in = new BufferedReader(new InputStreamReader(is, "UTF-8"));