您好我一直在尝试通过java将字符串插入sqlite数据库。但是我在值sql语句中传递的字符串参数在其中有引号作为内容。我想这就是我为什么没有插入数据库的错误。有没有办法绕过insert语句中的引号。谢谢。
这是代码:
public void addNote(String topicadd, String contentadd) throws Exception
{
try
{
getConnection();
statement = conn.createStatement();
statement.executeUpdate("insert into tbl_notes (notes_topic, notes_content) values ('" + topicadd + "', '" + contentadd +"')");
System.out.println("inserted note");
}
catch (Exception m)
{`enter code here`
System.out.println("error insert topic");
System.out.println(m.getMessage());
}
}
这是long的参数类型...这都在contentadd
中import java.sql.*;
Resultset rset = null; (this has no new ResultSet() initialization)
Connection conn = null; (this has no new initialization too...)
Statement statement = null; (this has now new initialization)
always.....
try
{
}
catch (Exception e) <- can switch e for any other alphabet
{
e.getMessage();
System.out.println("error this module"); <- personal practice
throw e;
}
- getting connection
Class.forName("org.sqlite.JDBC");
conn = DriverManager.getConnection("jdbc:sqlite:m.db");
*** this is sqlite connection format 'm.db' is the database name
establish connection first..
statement syntax follows:
statement = conn.createStatement();
rset = statement.executeQuery("select * from tbl_notes");
- executeQuery is used for SELECT sql statements
rset = statement.executeUpdate("insert into tbl_notes (ID, status) values
('100', 'status here');
整个文本在字符串contentadd中,我正在制作一个简短的记笔记程序......好吧,它不执行插入语句...错误在命令提示符附近的某个地方(来自文本的单词)我正在使用sqlite ...如果您需要更多细节,请告诉我。再次感谢你。
答案 0 :(得分:2)
使用PreparedStatement
插入包含特殊字符的值:
getConnection();
PreparedStatement statement = conn.prepareStatement("insert into tbl_notes (notes_topic, notes_content) values (?, ?)");
statement.setString(1, topicadd);
statement.setString(2, contentadd);
statement.executeUpdate();
如您所见,您可以使用PreparedStatement
的参数,该参数也可以包含引号。
此外,您还可以获得针对SQL注入的一些保护,因为PreparedStatement
的字符串会相应地进行转义。