Javascript与Java字符串编码

Question

我正在尝试将以下内容从Java移植到JavaScript：

String key1 = "whatever";
String otherKey = "blah";
String key2;    
byte keyBytes[] = key1.getBytes();
for (int i = 0; i < keyBytes.length; i++) {
    keyBytes[i] ^= otherKey.charAt(i % otherKey.length());
}
key2 = new String(keyBytes);

以下是我写的：

var key1 = "whatever";
var other_key = "blah";
var key2 = "";
for (var i = 0; i < key1.length; ++i)
{
    var ch = key1.charCodeAt(i);
    ch ^= other_key.charAt(i % other_key.length);
    key2 += String.fromCharCode(ch);
}

然而，他们给出了不同的答案

问题是，JavaScript字符串的编码是否不同？我如何纠正它们

Answer 1

您在代码中忘记了一个charCodeAt（），如下所示：

var key1 = "whatever";
var other_key = "blah";
var key2 = "";
for (var i = 0; i < key1.length; ++i)
{
    var ch = key1.charCodeAt(i);
    ch ^= other_key.charAt(i % other_key.length).charCodeAt(0);
    key2 += String.fromCharCode(ch);
}

在java中，在执行^=

我更改了代码，以查看java和javascript中的字节数组。运行后，结果相同：

Javascript:

function convert(){
    var key1 = "whatever";
    var other_key = "blah";

    var key2 = "";
    var byteArray = new Array();

    for (var i = 0; i < key1.length; ++i){
       var ch = key1.charCodeAt(i);
       ch ^= other_key.charAt(i % other_key.length).charCodeAt(0);

       byteArray.push(ch);
       key2 += String.fromCharCode(ch);
    }

    alert(byteArray);
}

结果：21,4,0,28,7,26,4,26

---

Java:

static void convert() {
    String key1 = "whatever";
    String otherKey = "blah";
    String key2;
    byte keyBytes[] = key1.getBytes();
    for (int i = 0; i < keyBytes.length; i++) {
        keyBytes[i] ^= otherKey.charAt(i % otherKey.length());
    }
    System.out.println(Arrays.toString(keyBytes));
    key2 = new String(keyBytes);
}

结果：[21,4,0,28,7,26,4,26]