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javascript Chinese to unicode

May 05, 2023 pm 02:38 PM

在编写JavaScript代码的过程中,有时我们需要将中文字符转换成unicode格式。这种转换的原因很多,比如在URL链接中需要将中文转换成%u的形式传递,或者在处理JSON数据时需要将中文转换成\u的形式。

JavaScript提供了多种方法将中文转换成unicode格式。下面就来逐一介绍这些方法。

1.使用escape()方法

escape()方法是将字符串转换成十六进制的unicode编码,每个中文字符会被转换成6个十六进制字符表示。例如,中文字符“你”会被转换成“%u4F60”。

示例代码如下:

let str = "你好";
let unicodeStr = escape(str);
console.log(unicodeStr); // 输出:%u4F60%u597D
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2.使用encodeURI()方法

encodeURI()方法是对URL中的中文字符进行转义,将它们转换成%u-encoded hexadecimal形式进行传输。这个方法不仅可以将中文字符转换成unicode格式,还可以将其他特殊字符进行转义。

示例代码如下:

let str = "你好";
let unicodeStr = encodeURI(str);
console.log(unicodeStr); // 输出:%E4%BD%A0%E5%A5%BD
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3.使用encodeURIComponent()方法

encodeURIComponent()方法需要将参数作为字符串传入函数,它会对字符串中的所有非字母数字字符进行转义,包括中文字符。将中文字符转换成unicode格式。

示例代码如下:

let str = "你好";
let unicodeStr = encodeURIComponent(str);
console.log(unicodeStr); // 输出:%E4%BD%A0%E5%A5%BD
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4.使用String.fromCharCode()方法

String.fromCharCode()方法可以将一串十进制的unicode编码转换成对应的字符。因此,我们只需要将中文字符对应的unicode编码转换成十进制的形式,再用String.fromCharCode()方法进行转换。

示例代码如下:

let str = "你好";
let unicodeStr = "";
for(let i=0;i<str.length;i++){
    unicodeStr+="\\u"+str.charCodeAt(i).toString(16);
}
console.log(unicodeStr); // 输出:\u4f60\u597d
console.log(eval("'" + unicodeStr + "'")); // 输出:你好
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总结

本文介绍了四种将中文字符转换成unicode格式的方法,即escape()、encodeURI()、encodeURIComponent()、String.fromCharCode()方法。开发者可以根据自己的需求,选择适合自己的方法进行中文字符转换。如果需要在URL链接中传递中文字符,建议使用encodeURIComponent()方法进行转换。

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