byte[] to String (Java)

最新推荐文章于 2023-12-30 22:01:21 发布

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最新推荐文章于 2023-12-30 22:01:21 发布

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本文介绍如何在Java中将字节数组转换为字符串，包括使用标准库方法、第三方库方法及直接从输入流读取文件内容并转换为字符串的实现方式。

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public String openFileToString(byte[] _bytes)
{
    String file_string = "";

    for(int i = 0; i < _bytes.length; i++)
    {
        file_string += (char)_bytes[i];
    }

    return file_string;    
}

String str = new String(bytes, "UTF-8");

And if you're feeling lazy, you can use the Apache Commons IO library to convert the InputStream to a String directly:

String str = IOUtils.toString(inputStream, "UTF-8");

byte[] byteArray = new byte[] {87, 79, 87, 46, 46, 46};

String value = new String(byteArray, "UTF-8");

public String openFileToString(String fileName) {
    String file_string;
    try {
        file_string = new String(_bytes, "UTF-8");
    } catch (UnsupportedEncodingException e) {
        // this should never happen because "UTF-8" is hard-coded.
        throw new IllegalStateException(e);
    }
    return file_string;
}

static final int BUFF_SIZE = 2048;
static final String DEFAULT_ENCODING = "utf-8";

public static String readFileToString(String filePath, String encoding) throws IOException {

    if (encoding == null || encoding.length() == 0)
        encoding = DEFAULT_ENCODING;

    StringBuffer content = new StringBuffer();

    FileInputStream fis = new FileInputStream(new File(filePath));
    byte[] buffer = new byte[BUFF_SIZE];

    int bytesRead = 0;
    while ((bytesRead = fis.read(buffer)) != -1)
        content.append(new String(buffer, 0, bytesRead, encoding));

    fis.close();        
    return content.toString();
}

public String openFileToString(String fileName)
{
    StringBuilder s = new StringBuilder(_bytes.length);

    for(int i = 0; i < _bytes.length; i++)
    {
        s.append((char)_bytes[i]);
    }

    return s.toString();    
}

public String openFileToString(String fileName) throws IOException
{
    InputStream is = new BufferedInputStream(new FileInputStream(fileName));

    try {
        InputStreamReader rdr = new InputStreamReader(is, "UTF-8");
        StringBuilder contents = new StringBuilder();
        char[] buff = new char[4096];
        int len = rdr.read(buff);
        while (len >= 0) {
            contents.append(buff, 0, len);
        }
        return buff.toString();
    } finally {
        try {
            is.close();
        } catch (Exception e) {
            // log error in closing the file
        }
    }
}

public String openFileToString(byte[] mybytes)
{
    String mystring="";

    for(int i=0; i<mybytes.length; i++)
    {
        mystring=new String(Byte.toString(mybyte[i]);
        mystring+=(" "+Byte.toString(mybyte[i]));
    }
    return mystring;
}