Java 如何将字符串转换为UTF-16

如何在java中将字符串转换为UTF-16

我正在将下面的objc代码转换为java，但java代码并没有给出与此代码相同的结果

   NSData *inputData = [pm dataUsingEncoding:NSUTF16LittleEndianStringEncoding];
    NSString *encodedString = [inputData base64EncodedString];
    pm = [IFunctions replaceString:encodedString replaceChar:@"=" replaceWithChar:@"-"];

Java代码

String s_decoded = new String(pm.getBytes(), "UTF-16LE");
pm = Base64.encode(s_decoded.getBytes()).toString().replace("=", "-");

---

no arg getBytes（）方法使用平台默认编码，可能不是UTF-16LE。请尝试

getBytes（“UTF-16LE”）

no-arg getBytes（）方法使用平台默认编码，这可能不是UTF-16LE。请尝试

getBytes（“UTF-16LE”）

参考此代码并修改您的代码

public class UseTheForce {
        public static void main(final String[] args)
            throws java.io.UnsupportedEncodingException {
            for (final byte b : args[0].getBytes(args[1])) {
                System.out.printf("%1$02X ", (b & 0xFF));
            }
            System.out.println();
        }
    }
    Test

    $ java UseTheForce luke US-ASCII
    6C 75 6B 65

    $ java UseTheForce luke UTF-8
    6C 75 6B 65

    $ java UseTheForce luke UTF-16
    FE FF 00 6C 00 75 00 6B 00 65

    $ java UseTheForce luke UTF-16BE
    00 6C 00 75 00 6B 00 65

    $ java UseTheForce luke UTF-16LE
    6C 00 75 00 6B 00 65 00

    $ java UseTheForce luke UTF-32
    00 00 00 6C 00 00 00 75 00 00 00 6B 00 00 00 65

---

参考此代码并修改您的代码

public class UseTheForce {
        public static void main(final String[] args)
            throws java.io.UnsupportedEncodingException {
            for (final byte b : args[0].getBytes(args[1])) {
                System.out.printf("%1$02X ", (b & 0xFF));
            }
            System.out.println();
        }
    }
    Test

    $ java UseTheForce luke US-ASCII
    6C 75 6B 65

    $ java UseTheForce luke UTF-8
    6C 75 6B 65

    $ java UseTheForce luke UTF-16
    FE FF 00 6C 00 75 00 6B 00 65

    $ java UseTheForce luke UTF-16BE
    00 6C 00 75 00 6B 00 65

    $ java UseTheForce luke UTF-16LE
    6C 00 75 00 6B 00 65 00

    $ java UseTheForce luke UTF-32
    00 00 00 6C 00 00 00 75 00 00 00 6B 00 00 00 65

---

您需要使用

getBytes（）

方法并指定所需的字符集：

public static void main(String[] args) throws UnsupportedEncodingException {
    char ch;
    ch = 0x0001;
    System.out.println(Arrays.toString((String.valueOf(ch)).getBytes(StandardCharsets.UTF_16LE)));
    ch = 0x0111;
    System.out.println(Arrays.toString((String.valueOf(ch)).getBytes(StandardCharsets.UTF_16LE)));
    ch = 0x1111;
    System.out.println(Arrays.toString((String.valueOf(ch)).getBytes(StandardCharsets.UTF_16LE)));
}

输出：

---

您需要使用

getBytes（）

方法并指定所需的字符集：

public static void main(String[] args) throws UnsupportedEncodingException {
    char ch;
    ch = 0x0001;
    System.out.println(Arrays.toString((String.valueOf(ch)).getBytes(StandardCharsets.UTF_16LE)));
    ch = 0x0111;
    System.out.println(Arrays.toString((String.valueOf(ch)).getBytes(StandardCharsets.UTF_16LE)));
    ch = 0x1111;
    System.out.println(Arrays.toString((String.valueOf(ch)).getBytes(StandardCharsets.UTF_16LE)));
}

输出：