Java开发网 - 【求助】关于jdbc驱动设置的问题。

Topic: 【求助】关于jdbc驱动设置的问题。

1.【求助】关于jdbc驱动设置的问题。

Posted by: caoyi
Posted on: 2004-04-29 21:30

我现在拥有jdbc的mysql-connector和servlet－api的驱动。当我把他设置在jcreator中作为archive时候，连驱动的程序可以正常的编译成功和运行。但是我在命令提示符中运行已经编译的程序却说:
"java.sql.SQLException: No suitable driver
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)"
我的classpath和path都设置了jdk目录bin目录上，且后面加了;.;编译其他没有驱动的程序以及运行他们都正常。不知道除了classpath和path环境变量设置外还要针对驱动设置些什么参数吗？

百忙之中抽时间看我这个帖子万分感谢。也非常感激能够给我回复。谢谢。

2.Re:【求助】关于jdbc驱动设置的问题。 [Re: caoyi]	Copy to clipboard
Posted by: jameszhang Posted on: 2004-04-29 21:51 java.sql.SQLException: No suitable driver 驱动程序与数据库不匹配当时鹅用ORACLE8的JDBC 访问9I时出过这种错！

3.Re:【求助】关于jdbc驱动设置的问题。 [Re: jameszhang]

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Posted by: caoyi
Posted on: 2004-04-29 22:28

jameszhang wrote:
java.sql.SQLException: No suitable driver
驱动程序与数据库不匹配

当时鹅用ORACLE8的JDBC 访问9I时出过这种错！

我用jc编译和运行都正常。该程序就是corejava2中的例子。我在jc中是把驱动设置为archive。驱动放在j2sdk1.4.2_04\jre\lib\ext下。

import java.io.*;
import java.util.*;
import java.sql.*;

class ExecSQL
{
public static void main(String args[])
{
try
{
Reader reader;
if(args.length==0)
reader = new InputStreamReader(System.in);
else
reader = new FileReader(args[0]);
Connection conn = getConnection();
Statement stat = conn.createStatement();

BufferedReader in = new BufferedReader(reader);

boolean done = false;
while(!done)
{
if(args.length == 0)
System.out.println(
"Enter command or a blank line to exit:");

String line = in.readLine();
if(line == null||line.length() == 0)
done = true;
else
{
try
{
boolean hasResultSet = stat.execute(line);
if(hasResultSet)
showResultSet(stat);
}
catch(SQLException ex)
{
while(ex != null)
{
ex.printStackTrace();
ex = ex.getNextException();
}
}
}
}
in.close();
stat.close();
conn.close();
}
catch(Exception ex)
{
ex.printStackTrace();
}
}
public static Connection getConnection() throws SQLException, IOException
{
Properties props = new Properties();
FileInputStream in = new FileInputStream("database.properties");
props.load(in);
in.close();

String drivers = props.getProperty("jdbc.drivers");
if(drivers != null)
System.setProperty("jdbc.drivers", drivers);
String url = props.getProperty("jdbc.url");
String username = props.getProperty("jdbc.username");
String password = props.getProperty("jdbc.password");

return
DriverManager.getConnection(url, username, password);
}
public static void showResultSet(Statement stat) throws SQLException
{
ResultSet result = stat.getResultSet();
ResultSetMetaData metaData = result.getMetaData();
int columnCount = metaData.getColumnCount();

for(int i = 1;i <= columnCount; i++)
{
if(i > 1) System.out.print(", ");
System.out.print(metaData.getColumnLabel(i));
}
System.out.println();

while(result.next())
{
for(int i = 1; i <= columnCount; i++)
{
if(i > 1) System.out.print(", ");
System.out.print(result.getString(i));
}
System.out.println();
}
result.close();
}
}

文件database.properties
jdbc.drivers=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test
jdbc.username=blue
jdbc.password=blue