我有一个文件,其中包含一些非UTF8字符(例如“ISO-8859-1”),因此我想将该文件转换(或读取)为UTF8编码,我该如何做?
代码如下:
File file = new File("some_file_with_non_utf8_characters.txt");
/* some code to convert the file to an utf8 file */
...
编辑:添加一个编码示例
我有一个文件,其中包含一些非UTF8字符(例如“ISO-8859-1”),因此我想将该文件转换(或读取)为UTF8编码,我该如何做?
代码如下:
File file = new File("some_file_with_non_utf8_characters.txt");
/* some code to convert the file to an utf8 file */
...
编辑:添加一个编码示例
以下代码将文件从srcEncoding转换为tgtEncoding:
public static void transform(File source, String srcEncoding, File target, String tgtEncoding) throws IOException {
BufferedReader br = null;
BufferedWriter bw = null;
try{
br = new BufferedReader(new InputStreamReader(new FileInputStream(source),srcEncoding));
bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(target), tgtEncoding));
char[] buffer = new char[16384];
int read;
while ((read = br.read(buffer)) != -1)
bw.write(buffer, 0, read);
} finally {
try {
if (br != null)
br.close();
} finally {
if (bw != null)
bw.close();
}
}
}
--编辑--
使用Try-with-resources(Java 7):
public static void transform(File source, String srcEncoding, File target, String tgtEncoding) throws IOException {
try (
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(source), srcEncoding));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(target), tgtEncoding)); ) {
char[] buffer = new char[16384];
int read;
while ((read = br.read(buffer)) != -1)
bw.write(buffer, 0, read);
}
}
String charset = "ISO-8859-1"; // or what corresponds
BufferedReader in = new BufferedReader(
new InputStreamReader (new FileInputStream(file), charset));
String line;
while( (line = in.readLine()) != null) {
....
}
这里有文本的解码结果。使用对称的Writer/OutputStream方法,您可以选择自己喜欢的编码(例如UTF-8)进行编写。
您需要知道输入文件的编码方式。例如,如果文件是Latin-1编码,您可以这样操作:
FileInputStream fis = new FileInputStream("test.in");
InputStreamReader isr = new InputStreamReader(fis, "ISO-8859-1");
Reader in = new BufferedReader(isr);
FileOutputStream fos = new FileOutputStream("test.out");
OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");
Writer out = new BufferedWriter(osw);
int ch;
while ((ch = in.read()) > -1) {
out.write(ch);
}
out.close();
in.close();
System.out.println("á é í ó ú")
正确打印字符。否则会打印一个问号符号。
-Dfile.encoding
使用的误解。 - BalusC