java.lang.ClassNotFoundException：com.microsoft.sqlserver.jdbc.SQLServerDriver

Question

java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver

I got the above exception when i trying to deploying my Application into tomcat. but the weird thing is , i tried with a simple main method and it's works fine. Any help please ???

I did the following:

Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
String connectionUrl = "jdbc:microsoft:sqlserver://localhost:1433;" + "database=DBName;" + "user=UserName;" + "password=Password";
connection = DriverManager.getConnection(connectionUrl);

Answer 1

您需要将包含类com.microsoft.sqlserver.jdbc.SQLServerDriver的jar文件添加到war文件的WEB-INF/lib文件夹中。

Answer 2

阅读Tomcat文档中有关类路径的说明，或者只是将sqljdbc.jar放在$ CATALINA_HOME / lib中以从所有应用程序访问它。

Answer 3

Eventhough you have JAR(sqlserverjdbc.jar) in build path You need to add the jar file containing the class. com.microsoft.sqlserver.jdbc.SQLServerDriver to your war file's WEB-INF/lib folder.

Answer 4

May 15, 2014 3:09:43 PM org.apache.tomcat.jdbc.pool.ConnectionPool init SEVERE: Unable to create initial connections of pool. java.sql.SQLException: com.microsoft.sqlserver.jdbc.SQLServerDriver at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:254) at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182) at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:701) at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:635) ...

It is quite puzzling because my web application has WEB-INF/lib/sqljdbc4.jar .

From the error message, somehow the jar file is required by Tomcat too.

After I copy the jar file to CATALINA_HOME/lib/sqljdbc4.jar , the error is gone.

Answer 5

Since you're running a web app, you need to have the MS SQL Server driver--or the driver for any DB--stored in two places. Inside the app that becomes your WAR and then you need a second copy that is stored in the App Server's LIB directory. So, if you're running on Tomcat then you would put it /opt/tomcat/lib or C:\\DEV\\tomcat7\\lib.