jdbc 连接 orcale 问题

网上找的代码
<%Class.forName("oracle.jdbc.driver.OracleDriver").newInstance(); 
String url="jdbc:oracle:thin:192.168.0.1:1521:qqq"; String user="aaa"; 
String password="aaa"; 
Connection conn= DriverManager.getConnection(url,user,password);    
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE); 
String sql="select matype_code,matype from mst_mate_type"; 
ResultSet rs=stmt.executeQuery(sql); 
while(rs.next()) {%>您的第一个字段内容为：<%=rs.getString(1)%> 
您的第二个字段内容为：<%=rs.getString(2)%> 
<%}%><%out.print("数据库操作成功");%> 
<%rs.close(); 
stmt.close(); 
conn.close(); 
%> 
错误提示
exception javax.servlet.ServletException: Io 异常: The Network Adapter could not establish the connection
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.test_jsp._jspService(test_jsp.java:99)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause java.sql.SQLException: Io 异常: The Network Adapter could not establish the connection
oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java)
oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java)
oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java)
oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java)
oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java)
java.sql.DriverManager.getConnection(DriverManager.java:512)
java.sql.DriverManager.getConnection(DriverManager.java:171)
org.apache.jsp.test_jsp._jspService(test_jsp.java:63)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)数据库用其他程序可以连接 ，请问为什么，驱动文件已经靠到了\ROOT\WEB-INF\lib目录下了