为什么要进行URL编码，先码住别人的：
https://www.cnblogs.com/jerrysion/p/5522673.html
然后，
public class URLTest { ???public static void main(String[] args) throws UnsupportedEncodingException{ ???????String name = "张三"; ???????????????/* ????????* 比特 ????????* -27,-68,-96,-28,-72,-119 ????????* URL ????????* %E5%BC%A0%E4%B8%89 ????????*/ ???????byte[] bytes = name.getBytes(); ???????for (byte x : bytes){ ???????????System.out.print(x + ","); ???????} ???????System.out.println(); ???????????????String s = URLEncoder.encode(name, "UTF-8"); ???????System.out.println(s); ???}}结果是：
-27,-68,-96,-28,-72,-119,%E5%BC%A0%E4%B8%89
-27就等于E5，因为-27是用补码存储的
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为什么要进行URL编码
原文地址：https://www.cnblogs.com/haoabcd2010/p/8982575.html