Experiment 10_2

Author: kudoabhijeet

Lab Experiments/Experiment 10/Exp10_2.java

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+//STEP 1. Import required packages
+import java.sql.*;
+
+public class Exp10_2 {
+    // JDBC driver name and database URL
+    static final String JDBC_DRIVER = "com.mysql.cj.jdbc.Driver";
+    static final String DB_URL = "jdbc:mysql://localhost/emp?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC";
+    static final String USER = "root";
+    static final String PASS = "";
+
+    public static void main(String[] args) {
+        Connection conn = null;
+        Statement stmt = null;
+        try{
+            //STEP 2: Register JDBC driver
+            Class.forName("com.mysql.cj.jdbc.Driver");
+
+            //STEP 3: Open a connection
+            System.out.println("Connecting to database...");
+            conn = DriverManager.getConnection(DB_URL,USER,PASS);
+
+            //STEP 4: Execute a query
+            System.out.println("Creating statement...");
+            stmt = conn.createStatement();
+            String sql;
+            sql = "SELECT id, first, last, age FROM registration";
+            ResultSet rs = stmt.executeQuery(sql);
+
+            //STEP 5: Extract data from result set
+            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);
+            }
+            //STEP 6: Clean-up environment
+            rs.close();
+            stmt.close();
+            conn.close();
+        }catch(SQLException se){
+            //Handle errors for JDBC
+            se.printStackTrace();
+        }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("Goodbye!");
+    }//end main
+}//end FirstExample