摘要：find()方法在部分匹配时和完全匹配时返回true,匹配不上返回false; matches()方法只有在完全匹配时返回true,匹配不上和部分匹配都返回false。 阅读全文

摘要：UTF-8 is a variable-length encoding. In the case of UTF-8, this means that storing one code point requires one to four bytes. However, MySQL's encodin 阅读全文