Презентация, доклад на тему Work with JDBC in Java.(for students)

of universities
Author: Dudnik Oxana

data
from the Java™ programming language.

The JDBC API —  The JDBC™ API provides
programmatic access to relational data
from the Java™ programming language.

String DB_URL = "jdbc:mysql://localhost/EMP";
static final String USER = "username";
static final String PASS = "password";
public Connection getConnection() throws SQLException {
Connection conn = null;
try
{ //Register JDBC driver
Class.forName("com.mysql.jdbc.Driver");
//Open a connection
System.out.println("Connecting to database...");
conn = DriverManager.getConnection(DB_URL, USER, PASS);
System.out.println("Connected to database");
}catch(Exception e){
e.printStackTrace();
}
return conn;
}

stmt = conn.createStatement();
String sql = "SELECT id, first, last, age FROM Employees";
ResultSet rs = stmt.executeQuery(sql);
// 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); }
//Clean-up environment
rs.close();
stmt.close();
}catch(SQLException se)
{se.printStackTrace();}