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关于mysql中特殊字符的使用注意事项_MySQL

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Release: 2016-06-01 13:38:18
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关于mysql中特殊字符的使用注意事项

 

1 直接拼成sql情况    

●如果是“=”,需要转义的字符为’ /

'转为''

/转为////

具体代码如下:

sql = sql.replace("'", "''");

sql = sql.replace("//", "////");

●如果是"like",需要转义的字符为‘ / % _

'转为''

/转为////////(注意需要8个,汉)

%转为//%

_转为//_

具体代码如下:

sql = sql.replace("'", "''");

sql = sql.replace("//", "////////");

sql = sql.replace("%", "//%");

sql = sql.replace("_", "//_");

2 使用预处理sql情况

●只有使用"like"时才需要转义

/转为////

%转为//%

_转为//_

sql = sql.replace("//", "////");

sql = sql.replace("%", "//%");

sql = sql.replace("_", "//_");

 

注意:因

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