java code to insert dynamic data to oracle database

I am writing a dynamic java code that if it find certine data in my xml ducument it must compare the coulmn name in the data base with the data I found. if they match insert its data to the database

My code:

 public void characters(char ch[], int start, int length)
    {
        String data = String.valueOf(ch, start, length).trim();

        if(this.insideTag && this.prevData != null)
        {
              System.out.println("Data in next tag after founding '"+prevData+"': "+data);
//here I want to compare the coulmn names of my database with "prevData" if they match insert the "data" as data for this coulmn

            this.prevData = null;
           
        }

        for(int i=0;i<searchData.length;i++)
        {
            if(data.equalsIgnoreCase(searchData[i]))
            {
                this.prevData = data;
                break;
            }
        }
    }
fm134Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

JaaxArchitectCommented:
Modify insertIntoDB as per your needs and have it called
private insertIntoDB(String val)
    // Database Connection object
    Connection conn = null;
 
    // Set database URL details.
    String url = "jdbc:oracle:thin:@localhost:1521:orcl";
    try {
      // Instantiate the driver class.
      Class.forName("oracle.jdbc.OracleDriver");
      // Get the database connection.
      conn = DriverManager.getConnection(url,"system","pass");
     
     
            PreparedStatement prep = conn.prepareStatement("insert into TBL("+val+")");
            prep.executeQuery();
     
    }catch (Exception e) {
          e.printStackTrace();
    }      
0
fm134Author Commented:
Hi jaxx,
thanks but I know how to connect to database now.
but the eproblem is  how to  

 System.out.println("Data in next tag after founding '"+prevData+"': "+data);
//here I want to compare the coulmn names of my database with "prevData" if they match insert the "data" as data for this coulmn

and u gave me:
  PreparedStatement prep = conn.prepareStatement("insert into TBL("+val+")");
            prep.executeQuery();
which did not compare the coulmn name with "prevData"

0
JaaxArchitectCommented:
Hope this helps:

private insertIntoDB(String val)
    // Database Connection object
    Connection conn = null;
 
    // Set database URL details.
    String url = "jdbc:oracle:thin:@localhost:1521:orcl";
    try {
      // Instantiate the driver class.
      Class.forName("oracle.jdbc.OracleDriver");
      // Get the database connection.
      conn = DriverManager.getConnection(url,"system","pass");
     
      PreparedStatement prep = conn.prepareStatement("select yourcol from yourtable");
      ResultSet rs = prep.executeQuery();
      while(rs.next()){
            String dbCol = rs.getString("yourcol");
            if(!val.equals(dbCol)){
                    PreparedStatement prep = conn.prepareStatement("insert into yourtable(yourcol) values('"+val+"')");
                    prep.executeQuery();
                    break;
            }
      }
     
     
    }catch (Exception e) {
          e.printStackTrace();
    }      
0
The Ultimate Tool Kit for Technolgy Solution Provi

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy for valuable how-to assets including sample agreements, checklists, flowcharts, and more!

JaaxArchitectCommented:
Sorry,
PreparedStatement prep = conn.prepareStatement("insert into yourtable(yourcol) values('"+val+"')");
shud just read

prep = conn.prepareStatement("insert into yourtable(yourcol) values('"+val+"')");


0
fm134Author Commented:
thanks jaxx,
but i am facing some problems:
C:\classes>javac -classpath C:\oracle\product\10.1.0\db_1\jdbc\lib\classes12.jar
 com\psol\xbe2\MySAXApp2.java
com\psol\xbe2\MySAXApp2.java:63: cannot resolve symbol
symbol  : class PreparedStatement
location: class com.psol.xbe2.MySAXApp2
      PreparedStatement prep = conn.prepareStatement("select p from pro");
      ^
1 error


the code:
 private void insertIntoDB(String val)
    {
    // Database Connection object
    Connection conn = null;
 
    // Set database URL details.
    String url = "jdbc:oracle:thin:@localhost:1521:orcl";
    try {
      // Instantiate the driver class.
      Class.forName("oracle.jdbc.OracleDriver");
      // Get the database connection.
      conn = DriverManager.getConnection(url,"system","pass");
     
      PreparedStatement prep = conn.prepareStatement("select p from pro");
      ResultSet rs = prep.executeQuery();
      while(rs.next()){
            String dbCol = rs.getString("p");
            if(!val.equals(dbCol)){
                    prep = conn.prepareStatement("insert into yourtable(p) values('"+val+"')");
                    prep.executeQuery();
                    break;
            }
      }
         
    }catch (Exception e) {
          e.printStackTrace();
    }    
    }
0
JaaxArchitectCommented:
Did u add the import statement for the PreparedStatement  ?
- import java.sql.PreparedStatement;
0
fm134Author Commented:
thanks jaax u solved it.
but I have two more questions:
1- C:\classes>javac -classpath . com\psol\xbe2\MySAXApp2.java
com\psol\xbe2\MySAXApp2.java:11: package oracle.jdbc does not exist
import oracle.jdbc.OraclePreparedStatement;
                   ^
1 error

I have this erroe even if put the C:\oracle\product\10.1.0\db_1\jdbc\lib\classes12.jar in my classpath???

2- how I call the code  private void insertIntoDB(String val)
from another function??
0
JaaxArchitectCommented:
1. You need  not specify the vendor specific PreparedStatement. java.sql.PreparedStatement will do.
In this way, you would make ur code independent of DB Drivers. Class.forName will load the appropriate DB Driver. classes12.jar shud in the classpath as you have done.

2.Since the calling method is in the same class, you can. 'private' has been specified to disallow access of this method from other class
0
fm134Author Commented:
thanks jaax,
but can u please change the the coulmn name can be dynamic
I have to compare every coulmn name with the data I found  if they match or simematch then insert the data to that coulm.
      PreparedStatement prep = conn.prepareStatement("select(dynamic name) from pro");

0
fm134Author Commented:
hi agian
I tried the code and nothing inserted in the database!!
  private void insertIntoDB(String val)
    {
    // Database Connection object
    Connection conn = null;
 
    // Set database URL details.
    String url = "jdbc:oracle:thin:@localhost:1521:orcl";
    try {
      // Instantiate the driver class.
      Class.forName("oracle.jdbc.OracleDriver");
      // Get the database connection.
      conn = DriverManager.getConnection(url,"system","pass");
     
      PreparedStatement prep = conn.prepareStatement("select p from pro1");
      ResultSet rs = prep.executeQuery();
      while(rs.next()){
            String dbCol = rs.getString("p");
            if(!val.equals(dbCol)){
                    prep = conn.prepareStatement("insert into pro1(p) values('"+val+"')");
                    prep.executeQuery();
                    break;
            }
      }
         
    }catch (Exception e) {
          e.printStackTrace();
    }    
    }

 public void characters(char ch[], int start, int length)
    {
        String data = String.valueOf(ch, start, length).trim();
        insertIntoDB("xxx");
}
0
fm134Author Commented:
thanks jax there is no problem now:)
0
JaaxArchitectCommented:
Cool Man. Please award me some points ;)
0
fm134Author Commented:
I just have one problem
can u please change the the coulmn name can be dynamic
I have to compare every coulmn name with the data I found  if they match or simematch then insert the data to that coulm.
      PreparedStatement prep = conn.prepareStatement("select(dynamic name) from pro");
0
JaaxArchitectCommented:
>>PreparedStatement prep = conn.prepareStatement("select(dynamic name) from pro");
Change it to
PreparedStatement prep = conn.prepareStatement("select  * from pro");
ResultSet rs = prep.executeQuery();
ResultSetMetaData rsmd = rs.getMetaData();
 int numberOfColumns = rsmd.getColumnCount();
while(rs.next()){
  String colValue = "";
  for(int i=0; i < numberOfColumns ; i++){
    colValue  = rs.getString(i);
    //Your logic to Compare
  }
}
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
fm134Author Commented:
thanks alooot Jaax
0
JaaxArchitectCommented:
You're welcome !
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Oracle Database

From novice to tech pro — start learning today.