javascript Chinese to unicode
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
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
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
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
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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