JDBC Commit and Rollback Example

//STEP 1. Import required packages
import java.sql.*;
public class example {
   // JDBC driver name and database URL
   static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";  
   static final String DB_URL = "jdbc:mysql://localhost/EMP";
   //  Database credentials
   static final String USER = "username";
   static final String PASS = "password";
   
 public static void main(String[] args) {
   Connection conn = null;
   Statement stmt = null;
   try{
      //STEP 2: Register JDBC driver
      Class.forName("com.mysql.jdbc.Driver");
      //STEP 3: Open a connection
      System.out.println("Connecting to database...");
      conn = DriverManager.getConnection(DB_URL,USER,PASS);
      //STEP 4: Set auto commit as false.
      conn.setAutoCommit(false);
      //STEP 5: Execute a query to create statment with
      // required arguments for RS example.
      System.out.println("Creating statement...");
      stmt = conn.createStatement(
                           ResultSet.TYPE_SCROLL_INSENSITIVE,
                           ResultSet.CONCUR_UPDATABLE);
       //STEP 6: INSERT a row into Friends table
      System.out.println("Inserting one row....");
      String SQL = "INSERT INTO Friends " +
                    "VALUES (106, 20, 'Mascrow', 'Chen')";
      stmt.executeUpdate(SQL);  
      //STEP 7: INSERT one more row into Friends table
      SQL = "INSERT INTO Friends " +
                    "VALUES (107, 22, 'Adim', 'Singh')";
      stmt.executeUpdate(SQL);
      //STEP 8: Commit data here.
      System.out.println("Commiting data here....");
      conn.commit();
	  
	  //STEP 9: Now list all the available records.
      String sql = "SELECT id, first, last, age FROM Friends";
      ResultSet rs = stmt.executeQuery(sql);
      System.out.println("List result set for reference....");
      printRs(rs);
      //STEP 10: Clean-up environment
      rs.close();
      stmt.close();
      conn.close();
   }catch(SQLException se){
      //Handle errors for JDBC
      se.printStackTrace();
      // If there is an error then rollback the changes.
      System.out.println("Rolling back data here....");
	  try{
		 if(conn!=null)
            conn.rollback();
      }catch(SQLException se2){
         se2.printStackTrace();
      }//end try
   }catch(Exception e){
      //Handle errors for Class.forName
      e.printStackTrace();
   }finally{
      //finally block used to close resources
      try{
         if(stmt!=null)
            stmt.close();
      }catch(SQLException se2){
      }// nothing we can do
      try{
         if(conn!=null)
            conn.close();
      }catch(SQLException se){
         se.printStackTrace();
      }//end finally try
   }//end try
   System.out.println("Have A Nice Day");
}//end main
   public static void printRs(ResultSet rs) throws SQLException{
      //Ensure we start with first row
      rs.beforeFirst();
      while(rs.next()){
         //Retrieve by column name
         int id  = rs.getInt("id");
         int age = rs.getInt("age");
         String first = rs.getString("first");
         String last = rs.getString("last");
         //Display values
         System.out.print("ID: " + id);
         System.out.print(", Age: " + age);
         System.out.print(", First: " + first);
         System.out.println(", Last: " + last);
     }
     System.out.println();
   }//end printRs()
}//end example

C:\>javac example.java
C:\>

C:\>java example
Connecting to database...
Creating statement...
Inserting one row....
Commiting data here....
List result set for reference....
ID: 100, Age: 21, First: Sophia, Last: Lomela
ID: 101, Age: 23, First: Katrina, Last: Kane
ID: 102, Age: 24, First: Guru, Last: Morkel
ID: 103, Age: 22, First: Simone, Last: Washer
ID: 106, Age: 20, First: Rita, Last: Tez
ID: 107, Age: 22, First: Sita, Last: Singh
Have A Nice Day
C:\>