java中字符编码的转换UTF8

时间:2023-12-24 阅读:54 评论:0 作者:yc888

在Java中,字符编码的转换通常涉及到String类和Charset类。下面是一些常见的字符编码转换操作:

1. 将字符串从一种编码转换为另一种编码:

String originalString = "Hello, 你好";

String sourceCharset = "UTF-8";

String targetCharset = "GBK";


try {

    byte[] sourceBytes = originalString.getBytes(sourceCharset);

    String convertedString = new String(sourceBytes, targetCharset);

    System.out.println("Converted String: " + convertedString);

} catch (UnsupportedEncodingException e) {

    e.printStackTrace();

}

2. 使用Charset类进行编码和解码:

import java.nio.charset.Charset;

import java.nio.charset.StandardCharsets;


String originalString = "Hello, 你好";

Charset sourceCharset = StandardCharsets.UTF_8;

Charset targetCharset = Charset.forName("GBK");


// 编码

byte[] sourceBytes = originalString.getBytes(sourceCharset);


// 解码

String convertedString = new String(sourceBytes, targetCharset);

System.out.println("Converted String: " + convertedString);

3. 使用InputStreamReaderOutputStreamWriter进行字符流的编码和解码:

import java.io.*;


String originalString = "Hello, 你好";

Charset sourceCharset = StandardCharsets.UTF_8;

Charset targetCharset = Charset.forName("GBK");


try {

    // 字符流的编码

    ByteArrayInputStream inputStream = new ByteArrayInputStream(originalString.getBytes(sourceCharset));

    InputStreamReader reader = new InputStreamReader(inputStream, sourceCharset);


    // 字符流的解码

    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

    OutputStreamWriter writer = new OutputStreamWriter(outputStream, targetCharset);


    int data;

    while ((data = reader.read()) != -1) {

        writer.write(data);

    }


    reader.close();

    writer.close();


    String convertedString = new String(outputStream.toByteArray(), targetCharset);

    System.out.println("Converted String: " + convertedString);

} catch (IOException e) {

    e.printStackTrace();

}

字符编码的正确转换是非常重要的,否则可能导致乱码或数据损坏。在进行字符编码转换时,最好明确指定源编码和目标编码,以避免不必要的问题。

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