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  • 关于数据库插入单引号

    今天遇到一个前台接受一个带单引号的数据 eg:'欧拉欧拉   插入数据库会报以下错误

    org.springframework.dao.DataIntegrityViolationException:
    ### Error querying database. Cause: java.sql.SQLException: Invalid SQL statement or JDBC escape, terminating ''' not found.
    ### The error may exist in com/cn/persistence/KnowQuestionMapper.xml
    ### The error may involve com.cn.persistence.KnowQuestionMapper.selectKnowQuestionList
    ### The error occurred while executing a query
    ### Cause: java.sql.SQLException: Invalid SQL statement or JDBC escape, terminating ''' not found.
    ; SQL []; Invalid SQL statement or JDBC escape, terminating ''' not found.; nested exception is java.sql.SQLException: Invalid SQL statement or JDBC escape, terminating ''' not found.

    解决方案 :把单引号替换再加一个单引号转义

    要插入的字符串,将其中的(’)替换成两个单引号(”)即可 。

    public static void main(String[] args) throws Exception{


    KnowQuestion ss=new KnowQuestion();

    String str="I'm Iron Man" .replaceAll(" ' ", " '' ");;

    String sql="insert into  knowQuestion VALUES(' "+str+" ');";

    ss.operate(sql, 2);

    System.out.println(str);

    System.out.println(sql);
    }

     eg:'欧拉欧拉 替换 ''欧拉欧拉

    tip:注意替换时,string是final修饰的,是不可变的

    "I'm Iron Man" .replaceAll(" ' ", " '' ");不可这样写,一定要把此新对象的引用再重新指向str,否则不会改变

    String str="I'm Iron Man" .replaceAll(" ' ", " '' ");

    参考文章 :http://www.itpub.net/thread-678193-1-1.html?tdsourcetag=s_pctim_aiomsg

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  • 原文地址:https://www.cnblogs.com/d0minic/p/11452204.html
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