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JDBC Insert Records

This chapter provides examples of how to insert records into a table using a JDBC application. Before executing the following example, please ensure that you have the following conditions:

  • To execute the following example, you can useUsernameAndPasswordReplace with the actual username and password.

  • Your MySQL or any database you are using has been started and is running.

Necessary steps

To create a new database using a JDBC application, you need to perform the following steps-

  • Import package:It requires you to include the software package that contains the JDBC classes required for database programming. Usually, use import java.sql.* That is enough.

  • Register JDBC driver: It requires you to initialize the driver so that you can open a communication channel with the database.

  • Establish a connection:It is necessary to use DriverManager.getConnection() Methods to create a Connection object, which represents a physical connection to the database server.

  • Execute the query: It is necessary to use an object of type Statement to construct and submit SQL statements, so that tables can be created in the selected database.

  • Clean up environment: Explicitly close all database resources is required, instead of relying on JVM's garbage collection.

Example code

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

//步骤1.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/STUDENTS";
   //  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{
      //步骤2:注册JDBC驱动程序
      Class.forName("com.mysql.jdbc.Driver");
      //步骤3:建立连接
      System.out.println("Connecting to a selected database...");
      conn = DriverManager.getConnection(DB_URL, USER, PASS);
      System.out.println("Connected database successfully...");
      
      //步骤4:执行查询
      System.out.println("Inserting records into the table...");
      stmt = conn.createStatement();
      
      String sql = "INSERT INTO Registration" +
                   "VALUES ("100, 'Zara', 'Ali', 18);
      stmt.executeUpdate(sql);
      sql = "INSERT INTO Registration" +
                   "VALUES ("101, 'Mahnaz', 'Fatma', 25);
      stmt.executeUpdate(sql);
      sql = "INSERT INTO Registration" +
                   "VALUES ("102, 'Zaid', 'Khan', 30)";
      stmt.executeUpdate(sql);
      sql = "INSERT INTO Registration" +
                   "VALUES("103, 'Sumit', 'Mittal', 28);
      stmt.executeUpdate(sql);
      System.out.println("Inserted records into the table...");
   catch(SQLException se){
      //Handle JDBC error
      se.printStackTrace();
   }
      //Handle Class.forName error
      e.printStackTrace();
   }finally{
      //Used for closing resources
      try{
         if(stmt!=null)
            conn.close();
      catch(SQLException se){
      }// Nothing to do
      try{
         if(conn!=null)
            conn.close();
      catch(SQLException se){
         se.printStackTrace();
      }
   }//End try
   System.out.println("Goodbye!");
}//End main
}//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 a selected database...
Connected database successfully...
Inserting records into the table...
Inserted records into the table...
Goodbye!
C:\>