mysql jdbc连接

public class JDBCTest {

	public static void main(String[] args) {
		String sql = "SELECT * FROM usertest";
		Connection conn = null;
		Statement st = null;
		ResultSet rs = null;
		try {
			Class.forName("com.mysql.jdbc.Driver");
			conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/wzz","root","1020");
			st = conn.createStatement();
			rs = st.executeQuery(sql);
			while(rs.next()){
				System.out.println(rs.getString("name")+rs.getInt("age"));
			}

		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				rs.close();
			} catch (Exception e2) {
			}
			try {
				st.close();
			} catch (Exception e3) {
			}
			try {
				conn.close();
			} catch (Exception e4) {
			}
		}
	}
}

public class JDBCTest {

	public static Connection getConnection() {
		Connection conn = null;
		try {
			Class.forName("com.mysql.jdbc.Driver");
			conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/wzz","root","1020");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return conn;
	}

	public static void main(String[] args) {
		Connection conn = getConnection();
		Statement st = null;
		try {
			String sql="insert into usertest(name,age) values('abc',18)";
			st = conn.createStatement();
			int count = st.executeUpdate(sql);
			System.out.println(count);

		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				st.close();
			} catch (Exception e1) {
			}
			try {
				conn.close();
			} catch (Exception e2) {
			}
		}
	}
}