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JDBC Browsing Result Set Example

The following are examples of several navigation methods described in the "result set" tutorial.

This example code is written based on the environment and database settings described in the previous chapters.

Copy and paste the following example into JDBCExample.java, compile and run as follows:

//Step1.Import the required packages
import java.sql.*;
public class JDBCExample {
   // 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{
      //Step2: Register JDBC driver
      Class.forName("com.mysql.jdbc.Driver");
      //Step3: Establish connection
      System.out.println("Connecting to database...");
      conn = DriverManager.getConnection(DB_URL, USER, PASS);
      //Step4: Execute query to create statement
      // Required parameters for RS example.
      System.out.println("Creating statement...");
      stmt = conn.createStatement();
                           ResultSet.TYPE_SCROLL_INSENSITIVE,
                           ResultSet.CONCUR_READ_ONLY);
      String sql;
      sql = "SELECT id, first, last, age FROM Employees";
      ResultSet rs = stmt.executeQuery(sql);
      // Move the cursor to the last row.
      System.out.println("Moving cursor to the last...");
      rs.last();
      
      //Step5Extract data from the result set
      System.out.println("Displaying record...");
      //Search by column name
      int id = rs.getInt("id");
      int age = rs.getInt("age");
      String first = rs.getString("first");
      String last = rs.getString("last");
  
      //Display value
      System.out.print("ID: " + id);
      System.out.print(", Age: " + age);
      System.out.print(", First: " + first);
      System.out.println(", Last: " + last);
      // Move the cursor to the first row.
      System.out.println("Moving cursor to the first row...");
      rs.first();
      
      //Step6Extract data from the result set
      System.out.println("Displaying record...");
      //Search by column name
      id = rs.getInt("id");
      age = rs.getInt("age");
      first = rs.getString("first");
      last = rs.getString("last");
  
      //Display value
      System.out.print("ID: " + id);
      System.out.print(", Age: " + age);
      System.out.print(", First: " + first);
      System.out.println(", Last: " + last);
     // Move the cursor to the first row.
      System.out.println("Moving cursor to the next row...");
      rs.next();
      
      //Step7Extract data from the result set
      System.out.println("Displaying record...");
      id = rs.getInt("id");
      age = rs.getInt("age");
      first = rs.getString("first");
      last = rs.getString("last");
  
      //Display value
      System.out.print("ID: " + id);
      System.out.print(", Age: " + age);
      System.out.print(", First: " + first);
      System.out.println(", Last: " + last);
      //Step8Clean up the environment
      rs.close();
      stmt.close();
      conn.close();
   }catch(SQLException se){
      //Handle JDBC errors
      se.printStackTrace();
   }
      //Handle errors from Class.forName
      e.printStackTrace();
   }
      //Used to close resources
      try{
         if(stmt!=null)
            stmt.close();
      }2{
      
      }
      try{
         if(conn!=null)
            conn.close();
      }catch(SQLException se){
         se.printStackTrace();
      }
   }
   System.out.println("Goodbye!");
}
}//End JDBCExample

Now let's compile the above example as follows:

C:\>javac JDBCExample.java
C:\>

RuntimeJDBCExampleIt will produce the following result-

C:\>java JDBCExample
Connecting to database...
Creating statement...
Moving cursor to the last...
Displaying record...
ID: 103, Age: 30, First: Sumit, Last: Mittal
Moving cursor to the first row...
Displaying record...
ID: 100, Age: 18, First: Zara, Last: Ali
Moving cursor to the next row...
Displaying record...
ID: 101, Age: 25, First: Mahnaz, Last: Fatma
Goodbye!
C:\>