输入样例:
String stest = "中文1234 abcd[]()<+>,.~\\";
System.out.println(stest);
System.out.println(escape(stest));
System.out.println(unescape(escape(stest)));
输出结果:
中文1234 abcd[]()<+>,.~\
%u4E2D%u65871234+abcd%5B%5D()%3C%2B%3E%2C.~%5C
中文1234 abcd[]()<+>,.~\