使用url编码参数的Java URL编码

Question

如何使用Java编码此字符串

http://demo.pl/sample?id=tests%trg=https%3A%2F%2Fwww.google.com%sample.html%3Fwmc%3DAFF48+_LS.%23%7NUMBER_ID%7D_%23%7NUMBER_ID%7D..

java.net.URLEncoder对此字符串进行编码，如下所示：

http%3A%2F%2Fdemo.pl%2Fsample%3Fid%3Dtests%25trg%3Dhttps%253A%252F%252Fwww.google.com%25sample.html%253Fwmc%253DAFF48%2B_LS.%2523%257NUMBER_ID%257D_%2523%257NUMBER_ID%257D..

我期待这个结果：

http%3A%2F%2Fdemo.pl%2Fsample%3Fid%3Dtests%25trg%3Dhttps%3A%2F%2Fwww.google.com%sample.html%3Fwmc%3DAFF48+_LS.%23%7NUMBER_ID%7D_%23%7NUMBER_ID%7D..

Answer 1

我认为以下代码可以帮助您：

String s = "http://demo.pl/sample?id=tests%trg=https%3A%2F%2Fwww.google.com%sample.html%3Fwmc%3DAFF48+_LS.%23%7NUMBER_ID%7D_%23%7NUMBER_ID%7D";
int i = s.indexOf("%");
String result1 = URLEncoder.encode(s.substring(0, i)) + "%25" + s.substring(i + 1);
System.out.println(result1); // print http%3A%2F%2Fdemo.pl%2Fsample%3Fid%3Dtests%25trg=https%3A%2F%2Fwww.google.com%sample.html%3Fwmc%3DAFF48+_LS.%23%7NUMBER_ID%7D_%23%7NUMBER_ID%7D

  

我不想编码String的编码部分。需要普遍的   算法。字符串并不总是片段编码

我认为在这种情况下通用算法是不可能的，你可以做什么来手动找到编码部分而不是再次编码（参见上面的代码）。