1

我想删除数据库中包含 .jpg 扩展名所在的 URL 的所有行！

我在用

 try{
 java.sql.Statement mystat=connection.createStatement();
 String delete_jpg="DELETE FROM mytable WHERE mycol LIKE '%.jpg%' ";
 mystat.executeUpdate(delete_jpg);
 }catch(Exception e){
  }

使用 Java JDBC 执行此查询完全没有错误，但也不会删除行！请有人可以告诉我我做错了什么！！！

示例 URL 是：

 images/affiliation-logo4.png HTTP/1.1
 images/661.jpg HTTP/1.1
 footerslider/images/blue-left-arrow.png HTTP/1.1
 footerslider/images/blue-right-arrow.png HTTP/1.1
 media/contentHeader/32.jpg HTTP/1.1     //I want to delete this type of rows
 index.php?option=com_content&task=view&id=543 HTTP/1.1
 images/favic.ico HTTP/1.1
 src/ HTTP/1.0
 uiit/faculty.php?dept_id=31 HTTP/1.1
 uims/faculty.php?dept_id=32 HTTP/1.1
 media/profile/dhS1t8X.jpg HTTP/1.1     //I want to delete this type of rows
 media/profile/SSbkpgG.jpg HTTP/1.1     //I want to delete this type of rows
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2 回答 2

0

您可以尝试对您的语句进行此修改：

String delete_jpg="DELETE FROM mytable WHERE mycol LIKE '%' + .jpg + '%' ";

于 2013-07-05T14:51:50.990 回答
0

从您的示例网址中，我看到该模式是：

 media/profile/dhS1t8X.jpg HTTP/1.1     //I want to delete this type of rows

问题是你做得正确，但模式应该是这样的：

try{
 java.sql.Statement mystat=connection.createStatement();
 String delete_jpg="DELETE FROM mytable WHERE mycol LIKE '%.jpg %' ";  //HERE YOU HAVE TO ADD A WHITE SPACE AFTER THE .jpg as you can also seen in your sample URL!
 mystat.executeUpdate(delete_jpg);
}catch(Exception e){
}

做到这一点，一定会帮助你！

于 2013-07-05T15:46:16.480 回答