解决java无法切分字符串，.split()无效

大概率是碰到转义字符了，加上双反斜杠即可，示例：

import java.util.Arrays;

public class MySplit {
    public static void main(String[] args) {
        String string = "aaa&123.cba$321";
        System.out.println(Arrays.toString(string.split(".")));
        System.out.println(Arrays.toString(string.split("\.")));
        System.out.println(Arrays.toString(string.split("$")));
        System.out.println(Arrays.toString(string.split("\$.")));
    }
}

结果：

[]
[aaa&123, cba$321]
[aaa&123.cba$321]
[aaa&123.cba, 21]

Python用多了，java的很多用法都忘掉了…