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getconnection
java中连接MySQL数据库的几种方式
答:
// 连续数据库 Connection conn = DriverManager.
getConnection
(url, user, password);if(!conn.isClosed()) System.out.println("Succeeded connecting to the Database!");// statement用来执行SQL语句 Statement statement = conn.createStatement();// 要执行的SQL语句 String sql = "s...
如何用JSP servlet完成一个简单的登录页面连接mysql数
答:
getConnection
(); }*/ } Java code? package com.dao;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException; import com.servlet.User;import com.util.
GetConnection
; public class Dao { private Connection conn; private PreparedStatement pstat; ...
[Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]用户 'sa...
答:
userPwd = "sa";Connection dbConn;try { Class.forName(driverName);dbConn = DriverManager.
getConnection
(dbURL, userName, userPwd);System.out.println("Connection Successful!");} catch (Exception e) { e.printStackTrace();} } } 照着这几条做,应该就没有问题了,祝你连接成功……...
variable con might not have been initialized
答:
Connection conn=DriverManager.
getConnection
("jdbc:odbc:firm","echo1004","echo1004shma");stmt=conn.createStatement();rs=stmt.executeQuery(sql);} catch(SQLException ex){ System.err.println("aq.executeQuery:"+ex.getMessage());} return rs;} public void executeUpdate(String sql){ stmt=...
java问题,高分悬赏!!!
答:
Connection con=DriverManager.
getConnection
(strurl,"sa","sa"); executeUpdate、executecon.createStatement(int resultSetType,int resultSetConcurrency) resultSetType定义结果集类型:TYPE_FORWARD_ONLY,结果集的游标只能向前移 TYPE_SCROLL_INSENSTIVE,结果集游标可以前后移动,结果集不反映表中数据变化 TYPE_SCROLL_...
如何在Oracle中使用Java存储过程
答:
try { Connection conn = DriverManager.
getConnection
("jdbc:default:connection:"); String sql = "INSERT INTO salgrade " + "(GRADE,LOSAL,HISAL) " + "VALUES(?,?,?)"; PreparedStatement pstmt = conn.prepareStatement(sql); pstmt.setInt(1,grade); pstmt.set...
怎么使用JDBC连接SQL Server
答:
Connection con = DriverManager.
getConnection
(url);在SQL Server Browser服务开启的情况下也可以通过服务名连接 Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");String url = "jdbc:sqlserver://localhost\\SQLEXPRESS;databaseName=master;IntegratedSecurity=True";Connection con = ...
如何解决“SQL对象名无效”的问题
答:
String URL="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=db_name"; //db_name为数据库名 String Username="username"; //用户 String Password="password"; //密码 Class.forName(Driver).new Instance(); //加载数据可驱动 Connection con=DriverManager.
getConnection
(URL,UserName,Pa...
高分java连接SQL server 2000 详细步骤
答:
at java.sql.DriverManager.
getConnection
(DriverManager.java:549) at java.sql.DriverManager.getConnection(DriverManager.java:181) at MSDBdemo.main(MSDBdemo.java:11)数据库连接失败注:1,打过sp3,sp3a,sp4补丁 2,telnet 服务开启 3,JDBC驱动成功安装 4,防火墙关了 5,程序如下:import java.sql.*;public clas...
java怎样连接mysql数据库
答:
1、java连接MySQL数据库需要有一个驱动jar包 例如:mysql-connector-java-5.1.26-bin.jar,该驱动jar可以自行百度搜索最新包下载放在项目的lib目录下即可。2、连接代码如下 package baidu.test.jsp;import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql....
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