Mega Code Archive
Store and retrieve an object from a table
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import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
public class Main {
public static void main(String args[]) throws Exception {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String URL = "jdbc:odbc:dbname";
Connection dbConn = DriverManager.getConnection(URL, "user", "passw");
Employee employee = new Employee(42, "AA", 9);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(baos);
oos.writeObject(employee);
byte[] employeeAsBytes = baos.toByteArray();
PreparedStatement pstmt = dbConn
.prepareStatement("INSERT INTO EMPLOYEE (emp) VALUES(?)");
ByteArrayInputStream bais = new ByteArrayInputStream(employeeAsBytes);
pstmt.setBinaryStream(1, bais, employeeAsBytes.length);
pstmt.executeUpdate();
pstmt.close();
Statement stmt = dbConn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT emp FROM Employee");
while (rs.next()) {
byte[] st = (byte[]) rs.getObject(1);
ByteArrayInputStream baip = new ByteArrayInputStream(st);
ObjectInputStream ois = new ObjectInputStream(baip);
Employee emp = (Employee) ois.readObject();
}
stmt.close();
rs.close();
dbConn.close();
}
}
class Employee implements Serializable {
int ID;
String name;
double salary;
public Employee(int ID, String name, double salary) {
this.ID = ID;
this.name = name;
this.salary = salary;
}
}
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