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POAdd backslash to Varchar in MySQL
 

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  1. POAdd backslash to Varchar in MySQL
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    <p>I've created this little quiz for a school project using Java and MySQL. Now My project runs fine but as an experiment i tried to add images in my question. The Question jFrame takes the question and all options directly from a database called ques having 8 columns last of which is "path" which is a varchar(500). Here is my Java code to add questions :-</p> <pre><code>try { Class.forName("java.sql.Driver"); Connection con = (Connection) DriverManager.getConnection(jdbcurl, user, pass); Statement st = con.createStatement(); ResultSet rt = st.executeQuery("SELECT qno from ques order by qno desc limit 1"); // get last qno primary key for (; rt.next(); ) { qno = (Integer) rt.getObject(1); // save qno as int } nqno = qno + 1; // create new qno if (path == null){ String query1 = "insert into ques values (" + nqno + ",'" + question + "','" + ans1 + "','" + ans2 + "','" + ans3 + "','" + ans4 + "','" + ca + "',null);"; // ca is correct answer and null is path Statement st1 = con.createStatement(); st1.executeUpdate(query1); System.out.println("query : "+query1); JOptionPane.showMessageDialog(this, "Question added successfully! Without Image");} else { String query1 = "insert into ques values (" + nqno + ",'" + question + "','" + ans1 + "','" + ans2 + "','" + ans3 + "','" + ans4 + "','" + ca + "','"+path+"');"; System.out.println("query :" +query1); Statement st1 = con.createStatement(); st1.executeUpdate(query1); JOptionPane.showMessageDialog(this, "Question added successfully! with image"); } } catch (Exception e) { JOptionPane.showMessageDialog(this, "Error in code"); </code></pre> <p>The query sent was query :insert into ques values (12,'123','123','123','123','123','123','F:\JavaQuiz\src\javaquiz\About.png'); All okay, no exception handled. But in the SQL the path is saved so :- F:JavaQuizsrcjavaquizAbout.png </p> <p>The database omits the backslashes. I want it not to do so. So that later I can call this link in my Question.java </p> <p>Please.. Any suggestion?</p> <p>(I'm sorry I'm new to programming so sorry if this is a dumb question)</p>
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    1. USMahmoud Gamal
    1. USAshar Rai Mujeeb
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    1. COJust figured that adding two backslashes like so :- 'F:\\JavaQuiz\\src\\javaquiz\\About.png'); fixes the issue. But how do i add that to my string?
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      1. POAdd backslash to Varchar in MySQL
      1. USAshar Rai Mujeeb
    2. COpath=path.replaceAll("\\","\\\\"); will replace all \ with \\
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      1. POAdd backslash to Varchar in MySQL
      1. USprajeesh kumar
    3. COIDE returns with error : Invalid regular expression : unexpected internal error. Code catches exception as well.
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      1. USAshar Rai Mujeeb
 

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