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Myeclipse10.7连接SQLServer数据库技术

Jun 07, 2016 pm 04:02 PM
sqlserver database connect

(1)学习数据库的时候最恼火的是不知道怎么连接,不想VS那样在WPF中我们直接使用函数即可调用数据库,但是在java中我们要使用JDBC技术, 因此我们的方法肯定要复杂一些!看了很多博客明文,试了很多方法还是不成功,最后看了《JavaWeb技术详解》恍然大悟,

(1)学习数据库的时候最恼火的是不知道怎么连接,不想VS那样在WPF中我们直接使用函数即可调用数据库,但是在java中我们要使用JDBC技术,

因此我们的方法肯定要复杂一些!看了很多博客明文,试了很多方法还是不成功,最后看了《JavaWeb技术详解》恍然大悟,特给大家分享一下!

(2)首先看一下我的项目机构:

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其中带有标出来的就是需要准备的;lib目录下的为jar包网上下载的;ManageUsers为自己编写的测试程序!

(3)如果你已经准备好了lib目录下的四个jar包则开始配置:

点击项目右键--properies---Java Bulid Path -----Libraries ---Add JARs ---弹出的框框点击你的项目--找到lib目录 选中四个jar包确定----在ok!

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(4)然后配置你的sql server ;

找到 sql server configurationmanager 找到1 乳沟看到TCP/IP为 “已禁用”则改为 我下边所示 启用即可!

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(5)演示的代码ManageUsers(已配置好servlet的xml配置)

 

package com.lc.view;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ManageUsers extends HttpServlet{

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException{

		response.setContentType("text/html;charset=utf-8");
		PrintWriter out = response.getWriter();
		out.println("<h1 id="管理用户">管理用户</h1>");
		
		Connection con = null;
		ResultSet rs = null;
		PreparedStatement ps = null;
		
		try {
			
			// 1.加载驱动
			Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
			
			// 2.得到连接
			
			con=DriverManager.getConnection("jdbc:microsoft:sqlserver://127.0.0.1:1433;databasename=DBName","username","password");/*数据库名用户名密码我改成我的了*/
			
			//3.创建PreparedStatement
			ps = con.prepareStatement("select * from users");
			rs = ps.executeQuery();
			
			out.println("<table border=1 margin=auto>");
			out.println("<tr><td>id</td><td>用户名</td><td>email</td><td>grade</td></tr>");
			//循环显示所有用户信息
			while(rs.next())
			{    //注意我去的顺序是1 2 4 5 因为的在数据库中的第三个 为密码 没有取出 所以为 1 2 4 5  如果不注意这点会报错的!
				out.println("<tr><td>"+rs.getInt(1)+
						"</td><td>"+rs.getString(2)+
						"</td><td>"+rs.getString(4)+
						"</td><td>"+rs.getInt(5)+
						"</td><tr>");
			}
			out.println("</table>");
			//5.根据结果处理
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		finally
		{
			try {

				if (rs != null) {

					rs.close();
				}
				if (ps != null) {

					ps.close();
				}
				if (con != null) {

					con.close();
				}
			} catch (Exception ex) {

				ex.printStackTrace();
			}
		}

		out.close();
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		this.doGet(request, response);
	}

}

Copy after login
(6)运行如下:
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(7)到此已经成功!如果你在这方面遇到问题的话 欢迎提问 共同学习!

另外 如果遇到连接数据库的问题 欢迎访问我整理的一些错误处理方法:http://blog.csdn.net/xlgen157387/article/details/39055085

最后 祝你成功!

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