基础却容易被忽略的那点事--web入侵方式及注意事项总结
搞了一上午，还是没有搞定，到处出错，郁闷了
我自己的工作机上转有DB2、MyEClipse、Visual Studio2010、Sql server2008
其中在MyEclipse用Java可以访问DB2，在Visual Studio2010上用C#可以访问Sql server2008
现在我有一个java程序和C#程序需要访问同一个数据库
可是问题出现了
我本来想让vs2010访问DB2，也在项目中引入了IBM.Data.DB2.dll的类库，可是在运行时却提示我“Error 3 The type or namespace name 'IBM' could not be found (are you missing a using directive or an assembly reference?) ”
代码如下：
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
//Application.EnableVisualStyles();
//Application.SetCompatibleTextRenderingDefault(false);
//Application.Run(new Main());
GetDB2();
}
static void GetDB2()
{
DB2Connection conn = null;
DB2Command cmd = null;
DB2DataReader reader = null;
conn = new DB2Connection("DATABASE=CSD;SERVER=10.60.30.85:50000;UID=DB2ADMIN;PWD=IBMDB2");
try
{
conn.Open();
cmd = new DB2Command("select * from TB_CANYOUNG", conn);
reader = cmd.ExecuteReader();
while (reader.Read())
{
Console.WriteLine(reader.GetString(0) + "\t" + reader.GetString(1));
}
}
catch (Exception)
{
throw;
}
finally
{
if (reader != null)
reader.Close();
if (conn != null)
conn.Close();
}
}
}
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
//Application.EnableVisualStyles();
//Application.SetCompatibleTextRenderingDefault(false);
//Application.Run(new Main());
GetDB2();
}
static void GetDB2()
{
DB2Connection conn = null;
DB2Command cmd = null;
DB2DataReader reader = null;
conn = new DB2Connection("DATABASE=CSD;SERVER=10.60.30.85:50000;UID=DB2ADMIN;PWD=IBMDB2");
try
{
conn.Open();
cmd = new DB2Command("select * from TB_CANYOUNG", conn);
reader = cmd.ExecuteReader();
while (reader.Read())
{
Console.WriteLine(reader.GetString(0) + "\t" + reader.GetString(1));
}
}
catch (Exception)
{
throw;
}
finally
{
if (reader != null)
reader.Close();
if (conn != null)
conn.Close();
}
}
}
这个不行，我就想在java中访问Sql server2008，msbase.jar、mssqlserver.jar、msutil.jar以及sqljdbc.jar四个jar包都引入了，可还是提示我：
Error Trace in getConnection() : [Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]无法打开登录所请求的数据库 "t_name"。登录失败。
Error: No active Connection
Java代码如下：
package DBHelper;
import java.sql.*;
import java.io.*;
import java.*;
public class Connect{
private java.sql.Connection con = null;
private final String url = "jdbc:microsoft:sqlserver://";
private final String serverName= "127.0.0.1";
private final String portNumber = "1433";
private final String databaseName= "t_name";
private final String userName = "sa";
private final String password = "627525";
// Informs the driver to use server a side-cursor,
// which permits more than one active statement
// on a connection.
private final String selectMethod = "cursor";
// Constructor
public Connect(){}
private String getConnectionUrl(){
return url+serverName+":"+portNumber+";databaseName="+databaseName+";selectMethod="+selectMethod+";";
}
private java.sql.Connection getConnection(){
try{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
con = java.sql.DriverManager.getConnection(getConnectionUrl(),userName,password);
if(con!=null) System.out.println("Connection Successful!");
}catch(Exception e){
e.printStackTrace();
System.out.println("Error Trace in getConnection() : " + e.getMessage());
}
return con;
}
/*
Display the driver properties, database details
*/
public void displayDbProperties(){
java.sql.DatabaseMetaData dm = null;
java.sql.ResultSet rs = null;
try{
con= this.getConnection();
if(con!=null){
dm = con.getMetaData();
System.out.println("Driver Information");
System.out.println("\tDriver Name: "+ dm.getDriverName());
System.out.println("\tDriver Version: "+ dm.getDriverVersion ());
System.out.println("\nDatabase Information ");
System.out.println("\tDatabase Name: "+ dm.getDatabaseProductName());
System.out.println("\tDatabase Version: "+ dm.getDatabaseProductVersion());
System.out.println("Avalilable Catalogs ");
rs = dm.getCatalogs();
while(rs.next()){
System.out.println("\tcatalog: "+ rs.getString(1));
}
rs.close();
rs = null;
closeConnection();
}else System.out.println("Error: No active Connection");
}catch(Exception e){
e.printStackTrace();
}
dm=null;
}
private void closeConnection(){
try{
if(con!=null)
con.close();
con=null;
}catch(Exception e){
e.printStackTrace();
}
}
public static void main(String[] args) throws Exception
{
Connect myDbTest = new Connect();
myDbTest.displayDbProperties();
}
}
import java.sql.*;
import java.io.*;
import java.*;
public class Connect{
private java.sql.Connection con = null;
private final String url = "jdbc:microsoft:sqlserver://";
private final String serverName= "127.0.0.1";
private final String portNumber = "1433";
private final String databaseName= "t_name";
private final String userName = "sa";
private final String password = "627525";
// Informs the driver to use server a side-cursor,
// which permits more than one active statement
// on a connection.
private final String selectMethod = "cursor";
// Constructor
public Connect(){}
private String getConnectionUrl(){
return url+serverName+":"+portNumber+";databaseName="+databaseName+";selectMethod="+selectMethod+";";
}
private java.sql.Connection getConnection(){
try{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
con = java.sql.DriverManager.getConnection(getConnectionUrl(),userName,password);
if(con!=null) System.out.println("Connection Successful!");
}catch(Exception e){
e.printStackTrace();
System.out.println("Error Trace in getConnection() : " + e.getMessage());
}
return con;
}
/*
Display the driver properties, database details
*/
public void displayDbProperties(){
java.sql.DatabaseMetaData dm = null;
java.sql.ResultSet rs = null;
try{
con= this.getConnection();
if(con!=null){
dm = con.getMetaData();
System.out.println("Driver Information");
System.out.println("\tDriver Name: "+ dm.getDriverName());
System.out.println("\tDriver Version: "+ dm.getDriverVersion ());
System.out.println("\nDatabase Information ");
System.out.println("\tDatabase Name: "+ dm.getDatabaseProductName());
System.out.println("\tDatabase Version: "+ dm.getDatabaseProductVersion());
System.out.println("Avalilable Catalogs ");
rs = dm.getCatalogs();
while(rs.next()){
System.out.println("\tcatalog: "+ rs.getString(1));
}
rs.close();
rs = null;
closeConnection();
}else System.out.println("Error: No active Connection");
}catch(Exception e){
e.printStackTrace();
}
dm=null;
}
private void closeConnection(){
try{
if(con!=null)
con.close();
con=null;
}catch(Exception e){
e.printStackTrace();
}
}
public static void main(String[] args) throws Exception
{
Connect myDbTest = new Connect();
myDbTest.displayDbProperties();
}
}
知道的朋友，希望不吝赐教！谢谢
这个文章发到首页不太合适
想在园子里找个能提问的专区又不知道发到哪里
不过
如果这个问题在这里有人提供了很好的解决方案
我想对别人对自己都会有帮助
希望管理员不要删除了，拜托了
关键字 aaa
秋色园是QBlog的官方站点,由路过秋天创建,基于cyqdata数据层框架开发的支持多用户、多语言、多数据库(access,mssql,oracle)、目录级url等功能强大的博客系统
"2010/10/25 23:12:00 | 开发测试及演示 | |
- #53你不认识我2010/11/17 6:30:27
- ;dir
- #52你不认识我2010/11/17 6:30:27
- |dir
- #51你不认识我2010/11/17 6:30:27
- <dir
- #50游客2010/11/17 6:30:26
- <dir
- #49游客2010/11/17 6:30:17
- \0dir\0
- #48你不认识我2010/11/17 6:30:17
- ;dir
- #47你不认识我2010/11/17 6:30:15
- \0dir\0
- #46你不认识我2010/11/17 6:30:15
- dir
- #45你不认识我2010/11/17 6:30:15
- &dir
- #44你不认识我2010/11/17 6:30:14
- |dir
- #43你不认识我2010/11/17 6:30:14
- &dir&
- #42游客2010/11/17 6:30:14
- dir
- #41游客2010/11/17 6:30:14
- &dir
- #40游客2010/11/17 6:30:08
- <dir
- #39游客2010/11/17 6:30:07
- ;dir
- #38游客2010/11/17 6:30:06
- ;dir
- #37游客2010/11/17 6:30:05
- |dir
- #36游客2010/11/17 6:30:05
- &dir&
- #35游客2010/11/17 6:30:05
- \0dir\0
- #34游客2010/11/17 6:30:04
- dir
- #33游客2010/11/17 6:30:04
- &dir
- #32游客2010/11/17 6:30:04
- |dir
- #31游客2010/11/17 6:30:03
- &dir&
- #30你不认识我2010/11/17 6:29:55
- 1acu546f016ef61090898a8a31d166e49cf7
- #29你不认识我2010/11/17 6:29:46
- 1acu4b8cf49e7c73a1e8e2d67cfdf4eaa304
- #28游客2010/11/17 6:29:44
- 1acu7f64506a3f13014a5592ce28acd720a9
- #27游客2010/11/17 6:29:40
- 1acuda20cbe56b
- #26你不认识我2010/11/17 6:29:32
- %27
- #25你不认识我2010/11/17 6:29:31
- �''�""
- #24你不认识我2010/11/17 6:29:30
- �'�"
- #23你不认识我2010/11/17 6:29:30
- JyI=
- #22你不认识我2010/11/17 6:29:29
- 1acunetix'"
- #21你不认识我2010/11/17 6:29:29
- 1\0'
- #20你不认识我2010/11/17 6:29:24
- JyI=
- #19你不认识我2010/11/17 6:29:22
- �''�""
- #18你不认识我2010/11/17 6:29:22
- �'�"
- #17你不认识我2010/11/17 6:29:21
- 1acunetix'"
- #16你不认识我2010/11/17 6:29:20
- 1\0'
- #15你不认识我2010/11/17 6:29:20
- %27
- #14游客2010/11/17 6:29:11
- 1acunetix'"
- #13游客2010/11/17 6:29:10
- �''�""
- #12游客2010/11/17 6:29:10
- �'�"
- #11游客2010/11/17 6:29:09
- JyI=
- #10游客2010/11/17 6:29:08
- 1\0'
- #9游客2010/11/17 6:29:08
- %27
- #8游客2010/11/17 6:28:58
- �'�"
- #7游客2010/11/17 6:28:58
- JyI=
- #6游客2010/11/17 6:28:55
- �''�""
- #5游客2010/11/17 6:28:55
- 1acunetix'"
- #4游客2010/11/17 6:28:55
- 1\0'