Spring 数据源配置与应用

 /**
* Created by IntelliJ IDEA.

* User: leizhimin

* Date: 2008-4-22 11:40:18

* Note: 子类DAO
*/
public class UserDAO extends BaseDAO implements IUserDAO {
    public void insert(User user) {
        String name = user.getName();
        int age = user.getAge().intValue();

        Connection conn = null;
        Statement stmt = null;

        try {
            conn = getConnection();
            stmt = conn.createStatement();
            stmt.execute("INSERT INTO user (name,age) " + "VALUES('" + name + "'," + age + ")");
        } catch (SQLException e) {
            e.printStackTrace();
        }
        finally {
            if (stmt != null) {
                try {
                    stmt.close();
                }
                catch (SQLException e) {
                    e.printStackTrace();
                }
            }
            if (conn != null) {
                try {
                    conn.close();
                }
                catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public User find(Integer id) {
        Connection conn = null;
        Statement stmt = null;

        try {
            conn = getConnection();
            stmt = conn.createStatement();

            ResultSet result = stmt.executeQuery(
                    "SELECT * FROM user WHERE id=" + id.intValue());
            if (result.next()) {
                Integer i = new Integer(result.getInt(1));
                String name = result.getString(2);
                Integer age = new Integer(result.getInt(3));

                User user = new User();
                user.setId(i);
                user.setName(name);
                user.setAge(age);

                return user;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        finally {
            if (stmt != null) {
                try {
                    stmt.close();
                }
                catch (SQLException e) {
                    e.printStackTrace();
                }
            }
            if (conn != null) {
                try {
                    conn.close();
                }
                catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }

        return null;
    }
}
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