Java: 以 UTF-32 格式写入文件

Question

是否可以将字符串写入utf-32格式的文件？例如：RandomAccessFile class 只提供了 writeUTF() 方法，它以修改后的 UTF-8 格式写入字符串。

假设我的任务是将每个现有的 unicode 字符写入一个文件:)。

Answer 1

您应该将您的字符串转换为 UTF-32 格式的字节，然后将这些字节写入您的随机文件

RandomAccessFile file = ...
String str = "Hi";
byte[] bytes = str.getBytes("UTF-32");
file.write(bytes);

Answer 2

你可以使用 BufferedWriter:

public class SampleCode {

    public static void main(String[] args) throws IOException {
        String aString = "File contents";
        BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("outfilename"), "UTF-32"));
        try {
            out.write(aString);
        } finally {
            out.close();
        }

    }
}

或者您可以使用

Analogously, the class java.io.OutputStreamWriter acts as a bridge between characters streams and bytes streams. Create a Writer with this class to be able to write bytes to the file:

Writer out = new OutputStreamWriter(new FileOutputStream(outfile), "UTF-32");

或者您也可以使用如下所示的字符串格式：

public static String convertTo32(String toConvert){
    for (int i = 0; i < toConvert.length(); ) {
        int codePoint = Character.codePointAt(toConvert, i);
        i += Character.charCount(codePoint);
        //System.out.printf("%x%n", codePoint);
        String utf32 = String.format("0x%x%n", codePoint);
        return utf32;
    }
    return null;
}

参见。

Java: 以 UTF-32 格式写入文件

Java: Write to a file in UTF-32 Format

java

unicode

randomaccessfile