JDBC Driver 连接Mysql Oracle 11g与SQL Server 2008

简单查询 打印结果

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class TextMysql {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stubr
		Connection connection = null;
		PreparedStatement ps = null;
		ResultSet rs = null;

		try {
			Class.forName("com.mysql.jdbc.Driver");
			// connection=DriverManager.getConnection("jdbc:mysql://localhost:3306/bookshop","root",
			// "admin");
			connection = DriverManager.getConnection(
					"jdbc:mysql://localhost/bookshop", "root", "admin");
			ps = connection.prepareStatement("select * from t_user");
			rs = ps.executeQuery();
			while (rs.next()) {
				System.out.println(rs.getString(1) + "\t" + rs.getString(2));
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

}

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class JDBCDemo {

	public static void main(String[] args) throws SQLException{
		// TODO Auto-generated method stub
		Connection conn = null;
		Statement statement = null;
		ResultSet resultSet = null;
		try {
			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
			conn = DriverManager.getConnection(
					"jdbc:sqlserver://localhost:1433;database=demodb", "admin",
					"admin");
			statement = conn.createStatement();
			resultSet = statement
					.executeQuery("select name,password from t_user");
			while (resultSet.next()) {
				String name = resultSet.getString("name");
				String password = resultSet.getString("password");
				System.out.println(name + " " + password);
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (resultSet != null) {
				resultSet.close();
			}
			if (statement != null) {
				statement.close();
			}
			if (conn != null) {
				conn.close();
			}
		}
	}
}

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class ConnectionSQLServer {

	public static void main(String[] args) {

		ResultSet resultSet = null;
		Statement stmt = null;
		Connection conn = null;
		try {

			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
			String url = "jdbc:sqlserver://localhost:1433;database=demodb";
			String name = "admin";
			String pass = "admin";
			String sqlStr = "select name,password from t_user";
			conn = DriverManager.getConnection(url, name, pass);
			stmt = conn.createStatement();
			resultSet = stmt.executeQuery(sqlStr);
			while (resultSet.next()) {
				String str1 = resultSet.getString(1);
				String str2 = resultSet.getString(2);
				System.out.println(str1 + " " + str2);
			}
		} catch (ClassNotFoundException ce) {
			ce.printStackTrace();
		} catch (SQLException se) {
			se.printStackTrace();
		} finally {
			try {
				if (resultSet != null) {
					resultSet.close();
				}
				if (stmt != null) {
					stmt.close();
				}
				if (conn != null) {
					conn.close();
				}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class ConnectionOracle {

	public static void main(String[] args) {

		try {
			Class.forName("oracle.jdbc.OracleDriver");
			String url = "jdbc:oracle:thin:@127.0.0.1:1521:king11g";
			String name = "programmer";
			String pass = "password";
			String sqlStr = "select username,email from o_user";
			Connection conn = DriverManager.getConnection(url, name, pass);
			Statement stmt = conn.createStatement();
			ResultSet resultSet = stmt.executeQuery(sqlStr);
			while (resultSet.next()) {
				String str1 = resultSet.getString(1);
				String str2 = resultSet.getString(2);
				System.out.println(str1 + " " + str2);
			}
			if (resultSet != null) {
				resultSet.close();
			}
			if (stmt != null) {
				stmt.close();
			}
			if (conn != null) {
				conn.close();
			}
		} catch (SQLException se) {

			se.printStackTrace();
		} catch (ClassNotFoundException ce) {

			ce.printStackTrace();
		}
	}
}