dbconnectionmanager.java

jsp开发常用信息管理系统适合初学者学习 网上购物

package ch09.util;

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

/**
 * @author <a href='[e-mail]'>chengwei</a>
 * 数据库连接
 */

public class DBConnectionManager {
    private String driverName = "com.microsoft.jdbc.sqlserver.SQLServerDriver";

    private String url = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=ch09_bookshop";

    private String user = "sa";

    private String password = "12345";

    public void setDriverName(String newDriverName) {
        driverName = newDriverName;
    }

    public String getDriverName() {
        return driverName;
    }

    public void setUrl(String newUrl) {
        url = newUrl;
    }

    public String getUrl() {
        return url;
    }

    public void setUser(String newUser) {
        user = newUser;
    }

    public String getUser() {
        return user;
    }

    public void setPassword(String newPassword) {
        password = newPassword;
    }

    public String getPassword() {
        return password;
    }

    /**
     * 获取数据库连接
     * @return
     */
    public Connection getConnection() {
        try {
            Class.forName(driverName);
            return DriverManager.getConnection(url, user, password);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
        try {

            DBConnectionManager dcm = new DBConnectionManager();
            Connection conn = dcm.getConnection();
            System.out.println(conn== null ? "conn is null" :" conn not null");
            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery("select * from BookAdminuser");

            while (rs.next()) {
                System.out.print("名称: " + rs.getString(1));
                System.out.print("\tpassword: " + rs.getString("adminpass"));
                System.out.println();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}