JAVA EE 连接MySql数据库
接上次JDBC 使用Derby数据库连接之后 这次尝试使用MySql 连接=-=
我们得先下载Mysql的驱动包：mysql-connector-java-5.1.41-bin.jar
下载之后 导入：
完成这个之后我们打开MySql Workbench 开启本地数据库 并创建 USERINFO 库
然后再到index.jsp中写入：
<%@ page language="java" import="java.util.*,java.sql.*" pageEncoding="ISO-8859-1"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <% //声明Connection对象 Connection con; //驱动程序名 String driver = "com.mysql.jdbc.Driver"; //URL指向要访问的数据库名mydata String url = "jdbc:mysql://localhost:3306/USERINFO"; //MySQL配置时的用户名 String user = "root"; //MySQL配置时的密码 String password = "699307"; //遍历查询结果集 Connection conn = null; try { //加载驱动程序 Class.forName(driver); //1.getConnection()方法，连接MySQL数据库！！ conn = DriverManager.getConnection(url,user,password); if(!conn.isClosed()) System.out.println("Succeeded connecting to the Database!"); //2.创建statement类对象，用来执行SQL语句！！ Statement st = conn.createStatement(); //执行sql语句 String sql = "select * from USERINFO"; //增删改查表中的内容，用executeUpdate方法 st.executeUpdate("insert into USERINFO(USERID, USERNAME) values (1, 'NOSTRING')"); st.executeUpdate("insert into USERINFO(USERID, USERNAME) values (2, 'BECHAR')"); st.executeUpdate("insert into USERINFO(USERID, USERNAME) values (3, 'ALEXVIEW')"); //读取表的内容，用executeQuery方法 ResultSet rs = st.executeQuery("select * from USERINFO"); //循环输出内容 while(rs.next()){ int userID = rs.getInt(1); String username = rs.getString(2); out.println("-------------------<br>"); out.println("uerid:"+ userID +"<br>"); out.println("username:"+ username +"<br>"); out.println("-------------------<br>"); } }catch(SQLException e){ out.print(e.getErrorCode() + "<br>"); out.print(e.getCause() + "<br>"); out.print(e.getMessage() + "<br>"); if(conn != null ) conn.close(); } %> </body> </html>
写入之后日常访问：
