java - 转义引号

Question

我正在尝试将字符串保存到数据库中，我需要将引号作为字符串的一部分:

String password = "\"foo\"";

我希望数据库中的值是 "foo"(包括引号) 但是斜杠也被存储。斜杠应该只是一个转义字符，编译时不保存吗？

Answer 1

However the slash is also stored.

不在您发布的字符串中。您发布的字符串中有五个字符:

"
f
o
o
"

It may be that whatever you're using to view it is showing the quotes escaped so that it's clear that they're not delimiting the string.

You can prove this like so:

public class ShowString {
    public static final void main(String[] args) {
        String password = "\"foo\"";
        int    index, len;

        for (index = 0, len = password.length(); index < len; ++index) {
            System.out.println("[" + index + "]: " + password.charAt(index));
        }
    }
}

输出:

[0]: "
[1]: f
[2]: o
[3]: o
[4]: "