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在java中将编码的压缩字符串转换为普通字符串时仅读取一半内容

    String request=new String("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");
    byte[] resByte=new byte[11474836];

    resByte=Base64.decode(request.toString().getBytes());

    InputStream input = new ByteArrayInputStream(resByte);

    byte[] readByte = new byte[11474836];

    ZipInputStream zip = new ZipInputStream(input);
    int noofbyteRead = 0;

    if ( zip.getNextEntry() != null )
    {
        noofbyteRead = zip.read(readByte);
    }
    byte[] writeByte = new byte[ noofbyteRead ];
    System.arraycopy( readByte,0,writeByte,0,noofbyteRead);

    zip.close();
    input.close();


    /* String actualXmlmessage = new String(writeByte);*/
    String s1 = new String(writeByte);
    System.out.println(s1);

s1只显示一半的内容。为什么它没有阅读全部内容


共 (1) 个答案

  1. # 1 楼答案

    在回答这个问题之前,让我做一些评论:

    不需要从字符串常量创建新的String

    String request= "UEsDBBQACAAIAHhoE....." ;
    

    Base64.decode不会收到保存结果的byte[]。所以,它很可能正在创建它返回的那个。因此,resByte不需要初始化resByte的声明应该是公正的

    byte[] resByte;
    

    这就是说,没有更多细节,指令String s1 = new String(writeByte);将使用平台默认编码(这取决于操作系统和操作系统配置,如果您没有手动设置)。如果您的编码是UTF-16(其中每个字符对应2个字节),那么您将获得writeByte中字节数的一半字符

    如果s1看起来乱七八糟(这与“内容的一半”甚至“仅仅是内容”非常不同,你应该在问题中指出这一点),那么这几乎是肯定会发生的事情

    解决方案是使用:

    String s1= new String(writeByte,charSetName) ;
    

    其中charSetName对应于原始输入的字符集(不仅在它被base-64编码之前,甚至在它被压缩之前)