转义字符的使用，怎么没效果？

Question

比方说
String busiN="dsfasfda'sadfa";busiN=busiN.replaceAll("'", "\'");我进行转义后，发现
busiN的数据还是="dsfasfda'sadfa"
请问怎么回事哦？

Answer 1

busiN=busiN.replaceAll("'", "\\\\'");

Answer 2

busiN=busiN.replaceAll("\'", "\\\'");

Answer 3

楼主这是嘛意思？
用单引号替换单引号，结果当然还是本身了busiN=busiN.replaceAll("'", "\"");//结果dsfasfda"sadfabusiN=busiN.replaceAll("'", "");//结果dsfasfdasadfa