ibatis连接数据库找不到数据库驱动程序
各位，我想在一个web项目里面用ibatis连接数据库，但是一直报四月 15, 2013 7:46:14 下午 com.ibatis.common.logging.jdk14.Jdk14LoggingImpl error
SEVERE: SimpleDataSource: Error while loading properties. Cause: java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:186)
at com.ibatis.common.resources.Resources.classForName(Resources.java:267)
at com.ibatis.common.resources.Resources.instantiate(Resources.java:283)
at com.ibatis.common.jdbc.SimpleDataSource.initialize(SimpleDataSource.java:199)
at com.ibatis.common.jdbc.SimpleDataSource.<init>(SimpleDataSource.java:116)
at com.ibatis.sqlmap.engine.datasource.SimpleDataSourceFactory.initialize(SimpleDataSourceFactory.java:31)
at com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser$9.process(SqlMapConfigParser.java:220)
at com.ibatis.common.xml.NodeletParser.processNodelet(NodeletParser.java:121)
at com.ibatis.common.xml.NodeletParser.process(NodeletParser.java:105)
at com.ibatis.common.xml.NodeletParser.process(NodeletParser.java:102)
at com.ibatis.common.xml.NodeletParser.process(NodeletParser.java:102)
at com.ibatis.common.xml.NodeletParser.parse(NodeletParser.java:72)
at com.ibatis.common.xml.NodeletParser.parse(NodeletParser.java:51)
at com.ibatis.sqlmap.engine.builder.xml.SqlMapConfigParser.parse(SqlMapConfigParser.java:46)
at com.ibatis.sqlmap.client.SqlMapClientBuilder.buildSqlMapClient(SqlMapClientBuilder.java:63)
at com.sis.common.getSqlMapClient.getSqlMapClients(getSqlMapClient.java:18)
at com.sis.common.LoginServlet.doGet(LoginServlet.java:26)
at com.sis.common.LoginServlet.doPost(LoginServlet.java:47)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
at java.lang.Thread.run(Thread.java:722)
这个错，可是我用jdbc是可以连上数据库的？但是ibatis就一直找不到驱动程序！请问驱动程序的jar包应该放在哪个地方？我放在项目的lib以及tomcat的lib都不行
而且奇怪的是，我把驱动程序的jar包都删掉之后，还是可以用jdbc连数据库（缓存我也清了），这到底怎么回事，真心求教 --------------------编程问答-------------------- 没有人回答？我要顶上去 --------------------编程问答-------------------- java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver 肯定是找不到驱动的jar包，jdbc的jar包对于tomcat的工程来说，我通常都放到具体工程的web_info的lib里面。 --------------------编程问答-------------------- 还要确认下异常中提到的这个类，你的jar文件里是否真的存在这个类。连接数据库的字符串写的是否一致？
补充：Java , Java EE
