Java字节到字符串 [英] Java byte to string

问题描述

所以我想将DatagramPacket的getData（）函数返回的字节数组转换为字符串。我知道将整个字节数组转换为字符串的方法只是：

So I want to convert a byte array returned by the DatagramPacket's getData() function into a string. I know the way to convert the whole byte array to string is just:

String str = new String(bytes);

但是，这会在末尾输出空字符。因此，如果字节数组为

However, this prints out null characters at the end. So if the byte array was

[114, 101, 113, 117, 101, 115, 116, 0, 0, 0]

0将在控制台上打印出空框。所以我基本上只想打印出来：

The 0's print out empty boxes on the console. So I basically only want to print out:

[114, 101, 113, 117, 101, 115, 116]

所以我做了这个功能：

public void print(DatagramPacket d) {
        byte[] data = d.getData();
        for(int i=0; i< d.getLength(); i++) {
            if(data[i] != 0)
                System.out.println( data[i] );
        }
    }

但不幸的是，这是打印出实际数字而不是这些信。因此，如何将每个字节转换为字符串并打印出来。或者，如果还有另一种方法来打印字节数组，但最后没有空值，那就没问题了。

But unfortunately this is printing out the actual numbers instead of the letters. So how can I convert each individual byte to a string and print that out. Or if there is another way to print the byte array without the nulls at the end then that'll be fine too.

推荐答案

只需将每个不为0的int强制转换为char。您可以在打印中对其进行测试：

Just cast each int, that is not 0, to a char. You can test it in your print:

System.out.println((char)data[i]);

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