java 如何最好地将 byte[] 数组转换为字符串缓冲区
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How best to convert a byte[] array to a string buffer
提问by Guy Rich
I have a number of byte[] array variables I need to convert to string buffers.
我有许多需要转换为字符串缓冲区的 byte[] 数组变量。
is there a method for this type of conversion ?
有这种类型的转换方法吗？
Thanks
谢谢
Thank you all for your responses..However I didn't make myself clear.... I'm using some byte[] arrays pre-defined as public static "under" the class declaration for my java program. these "fields" are reused during the "life" of the process. As the program issues status messages, (written to a file) I've defined a string buffer (mesg_data) that used to format a status message. So as the program executes I tried msg2 = String(byte_array2) I get a compiler error: cannot find symbol symbol : method String(byte[]) location: class APPC_LU62.java.LU62XnsCvr convrsID = String(conversation_ID) ;
谢谢大家的回复..但是我没有说清楚..我正在使用一些字节 [] 数组，这些数组在我的 Java 程序的类声明下预定义为公共静态“下”。这些“字段”在过程的“生命周期”中被重复使用。当程序发出状态消息时，（写入文件）我定义了一个用于格式化状态消息的字符串缓冲区 (mesg_data)。所以当程序执行我试过 msg2 = String(byte_array2) 我得到一个编译器错误：找不到符号符号：方法字符串（字节[]）位置：类APPC_LU62.java.LU62XnsCvr convrsID = String（conversation_ID）;
example:
例子：
public class LU62XnsCvr extends Object
.
.
static String convrsID ;
static byte[] conversation_ID = new byte[8] ;
So I can't use a "dynamic" define of a string variable because the same variable is used in multiple occurances.
所以我不能使用字符串变量的“动态”定义，因为同一个变量被多次使用。
I hope I made myself clear Thanks ever so much
我希望我说清楚了 非常感谢
Guy
盖伊
回答by helpermethod
String s = new String(myByteArray, "UTF-8");
StringBuilder sb = new StringBuilder(s);
回答by Itay Maman
There is a constructor that a byte array and encoding:
有一个字节数组和编码的构造函数：
byte[] bytes = new byte[200];
//...
String s = new String(bytes, "UTF-8");
In order to translate bytes to characters you need to specify encoding: the scheme by which sequences (typically of length 1,2 or 3) of 0-255 values (that is: sequence of bytes) are mapped to characters. UTF-8 is probably the best bet as a default.
为了将字节转换为字符，您需要指定编码：0-255 个值（即：字节序列）的序列（通常长度为 1,2 或 3）映射到字符的方案。UTF-8 可能是默认的最佳选择。
回答by Martin
You can turn it to a Stringdirectly
你可以String直接把它变成
byte[] bytearray
....
String mystring = new String(bytearray)
and then to convert to a StringBuffer
然后转换为 StringBuffer
StringBuffer buffer = new StringBuffer(mystring)
回答by Void
You may use
您可以使用
str = new String(bytes)
By thewhat the code above does is to create a java String (i.e. UTF-16) with the default platform character encoding.
通过上面的代码所做的是创建一个带有默认平台字符编码的java字符串（即UTF-16）。
If the byte array was created from a string encoded in the platform default character encoding this will work well.
如果字节数组是从以平台默认字符编码中编码的字符串创建的，这将很好地工作。
If not you need to specify the correct character encoding (Charset) as
如果不是，您需要将正确的字符编码（Charset）指定为
String str = new String (byte [] bytes, Charset charset)
