Java 如何将字节数组中的数据打印为字符
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原文地址: http://stackoverflow.com/questions/6463580/
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how to print the data in byte array as characters
提问by
In my byte array i have the hash values of a message which consists of some negative values and also positive values. Positive values are being printed easily by using the (char)byte[i]statement. Now how can i get the negative value
在我的字节数组中，我有一条消息的哈希值，它由一些负值和正值组成。使用该(char)byte[i]语句可以轻松打印正值。现在我怎样才能得到负值
采纳答案by Jon Skeet
Well if you're happy printing it in decimal, you could just make it positive by masking:
好吧，如果你喜欢用十进制打印它，你可以通过屏蔽来使它成为正数：
int positive = bytes[i] & 0xff;
If you're printing out a hash though, it would be more conventional to use hex. There are plenty of other questions on Stack Overflow addressing converting binary data to a hex string in Java.
但是，如果您要打印散列，则使用十六进制会更传统。关于 Stack Overflow 解决在 Java 中将二进制数据转换为十六进制字符串的问题还有很多其他问题。
回答by alphazero
byte[] buff = {1, -2, 5, 66};
for(byte c : buff) {
System.out.format("%d ", c);
}
System.out.println();
gets you
得到你
1 -2 5 66
回答by Bohemian
How about Arrays.toString(byteArray)?
怎么样Arrays.toString(byteArray)？
Here's some compilable code:
这是一些可编译的代码：
byte[] byteArray = new byte[] { -1, -128, 1, 127 };
System.out.println(Arrays.toString(byteArray));
Output:
输出：
[-1, -128, 1, 127]
Why re-invent the wheel...
为什么要重新发明轮子...
回答by Peter Lawrey
If you want to print the bytes as chars you can use the String constructor.
如果要将字节打印为字符，可以使用 String 构造函数。
byte[] bytes = new byte[] { -1, -128, 1, 127 };
System.out.println(new String(bytes, 0));
回答by Vinit Prajapati
Try this one : new String(byte[])
试试这个： new String(byte[])
回答by Robust
Try it:
尝试一下：
public static String print(byte[] bytes) {
StringBuilder sb = new StringBuilder();
sb.append("[ ");
for (byte b : bytes) {
sb.append(String.format("0x%02X ", b));
}
sb.append("]");
return sb.toString();
}
Example:
例子：
public static void main(String []args){
byte[] bytes = new byte[] {
(byte) 0x01, (byte) 0xFF, (byte) 0x2E, (byte) 0x6E, (byte) 0x30
};
System.out.println("bytes = " + print(bytes));
}
Output: bytes = [ 0x01 0xFF 0x2E 0x6E 0x30 ]
输出： bytes = [ 0x01 0xFF 0x2E 0x6E 0x30 ]
