在 React 之前 html 页面想要获取当前地址参数，只能通过静态解析的方式在获取，列举几种语言的获取方式
Javascript
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| function getValue(key) {
var name = key + "=";
var str = window.location.search;
var beginIndex = str.indexOf("?" + name);
if (beginIndex == -1) {
beginIndex = str.indexOf("&" + name);
}
if (beginIndex != -1) {
var pos_start = beginIndex + name.length + 1;
var pos_end = str.indexOf("&", pos_start);
if (pos_end == -1) {
return decodeURIComponent(str.substring(pos_start));
} else {
return decodeURIComponent(str.substring(pos_start, pos_end));
}
}
}
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Python
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| #!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author: wxnacy([email protected])
def get_value(url, k):
"""获取地址中参数值"""
nk = '{}='.format(k)
if nk not in url:
return None
b = url.find(nk) + len(nk) # 获取开始位置
e = url.find('&', b) if url.find('&', b) != -1 else len(url) # 结束位置
v = url[b:e]
return v
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Java
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| public static String getValue(String url, String key){
String k = key + "=";
int begin = url.indexOf(k);
if(begin == -1){
return null;
}
begin = begin + k.length();
int end = url.indexOf("&", begin);
if(end == -1){
return url.substring(begin);
}else {
return url.substring(begin, end);
}
}
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