Use url to encode and decode
Encoding and decoding classes
java.net.URLDecoder.decode(url, decoding format) decoder. Decoding method.
Convert into an ordinary string, URLEncoder.decode(url, encoding format) converts an ordinary string into a string in the specified format
package com.zixue.springbootmybatis.test; import java.io.UnsupportedEncodingException; import java.net.URLDecoder; import java.net.URLEncoder; /** 编码Encode后都返回了新的字符串,编码后的字符串不能跨平台,所以要统一制定编码格式 * 需要注意的是在url中 "\" '&' '=' ':' '/'都是具有特殊意义的符号,这些符号一旦被编译后就会失去本身的 * 含义,导致无法被解析, * 所以在url中需要分块编码, * 解码Decoder类中decode方法作用是变回成普通字符,其中加号会变成空格, * */ public class testtest { public static void main(String[] args) throws UnsupportedEncodingException { String url = "http://www.baidu.com?name='张三'&age=18 "; String encodeStr = URLEncoder.encode(url,"UTF-8"); System.out.println(encodeStr); System.out.println(URLDecoder.decode(encodeStr,"UTF-8")); } }
Encoding in js
encodeURL(String url)
The function is to encode the string as a url, which is to fully encode the url. All pairs of: ? @ & = will not be escapedencodeURLComponent()
It is used to encode the string, generally used for a certain parameter that requires a single compilation When used, the parameter can be Chinese
<script > $(function(){ alert("haha"); var str = 'http://www.baidu.com?name=张三&age=18'; console.log(str); a(str); }); function a (s){ var h = encodeURI(s); console.log(h); var y = encodeURIComponent("张三"); console.log(y); var g = "www.baidu.com?name="; var i = encodeURIComponent("张三"); console.log(g+i); } </script>
Java correct URL decoding method: URLDecoder.decode
Exception in thread "main" java.lang.IllegalArgumentException: URLDecoder: Illegal hex characters in escape (%) pattern - For input string: "u9"
at java.net.URLDecoder.decode(URLDecoder.java:194)
at com.hbzx.controller.PayResultController.main(PayResultController.java:253)
Java calls URLDecoder.decode(str, "UTF-8"); The main reason why the above exception is thrown % is a special character in the URL and needs to be escaped.
Solution
Use % to replace the % sign in the string
url = url.replaceAll("%(?![0-9a-fA-F]{2})", "%25"); String urlStr = URLDecoder.decode(url, "UTF-8");
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