java URI#getQuery（）无法解码非法字符

Question

为什么

new URI(
    null,
    null,
    "/monitor/123456/data",
    "filterParams=[{\"id\":12,\"type\":\"dimension\"}]",
    null).getQuery()

返回

filterParams=[%7B%22id%22:12,%22type%22:%22dimension%22%7D]

而不是

"filterParams=[{\"id\":12,\"type\":\"dimension\"}]"

根据URI#getQuery()文件

The string returned by this method is equal to that returned by the #getRawQuery() method except that all sequences of escaped octets are decoded.

是JDK bug还是我在这里缺少一些理解

Answer 1

根据私有方法URI上面的注释。解码它不是一个bug，而是一个功能：）

/*
Evaluates all escapes in s, applying UTF-8 decoding if needed.  Assumes
that escapes are well-formed syntactically, i.e., of the form %XX.  If a
sequence of escaped octets is not valid UTF-8 then the erroneous octets
are replaced with '\uFFFD'.
Exception: any "%" found between "[]" is left alone. It is an IPv6  literal with a scope_id
*/
private static String decode(String s) {...}