Link to home
Start Free TrialLog in
Avatar of fm134
fm134

asked on

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;
            }
        }
    }
Avatar of Jaax
Jaax
Flag of India image

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();
    }      
Avatar of fm134
fm134

ASKER

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"

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

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


Avatar of fm134

ASKER

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();
    }    
    }
Did u add the import statement for the PreparedStatement  ?
- import java.sql.PreparedStatement;
Avatar of fm134

ASKER

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??
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
Avatar of fm134

ASKER

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");

Avatar of fm134

ASKER

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");
}
Avatar of fm134

ASKER

thanks jax there is no problem now:)
Cool Man. Please award me some points ;)
Avatar of fm134

ASKER

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");
ASKER CERTIFIED SOLUTION
Avatar of Jaax
Jaax
Flag of India image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of fm134

ASKER

thanks alooot Jaax
You're welcome !