String s1 = "2021\0318\1755\001";
s1 = s1.replaceAll("\\\\", "/");
这样 s1 的值就变成了 "2021/0318/1755/001"
java 用replaceAll 方法结合正则表达式将字符串中所有的反斜杠（\）替换为斜杠（/）的方式
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Origin blog.csdn.net/dd2016124/article/details/114986720
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