请帮帮忙,我是新手
keple 2004-09-28 10:15:06
问题一: class.ForName(sun.jdbc.odbc.JdbcOdbcDriver)到底是加载JDBC
驱动程序还是加载JDBC-ODBC bridge驱动程序?
用jdbc-odbc连接数据库 呢?
我已安装jswdk-1.0.1和 j2sdk1.4.2 是否还需安装JDBC-ODBC
bridge 驱动程序? java.sql包自带了吗?
问题二:我无论如何也连不上数据库,服务器总出现如下:
JSWDK WebServer Version 1.0.1
Loaded configuration from: file:E:\jswdk-1.0.1\webserver.xml
endpoint created: localhost/127.0.0.1:8080
com.sun.web.core.DefaultServlet: init
com.sun.jsp.runtime.JspServlet: init
Scratch dir for the JSP engine is: work\%3A8080%2F
IMPORTANT: Do not modify the generated servlets
aq.executeQuery:[Microsoft][ODBC 驱动程序管理器] 未发现数据源名称
并且未指定默认
驱动程序
Unhandled error! You might want to consider having an error page
to report such
errors more gracefully
java.lang.NullPointerException
at webpages.faq_jsp_1._jspService(faq_jsp_1.java:98)
at com.sun.jsp.runtime.HttpJspBase.service
(HttpJspBase.java:87)
at javax.servlet.http.HttpServlet.service
(HttpServlet.java:840)
at
com.sun.jsp.runtime.JspServlet$JspServletWrapper.service
(JspServlet.j
ava:88)
at com.sun.jsp.runtime.JspServlet.serviceJspFile
(JspServlet.java:218)
at com.sun.jsp.runtime.JspServlet.service
(JspServlet.java:294)
at javax.servlet.http.HttpServlet.service
(HttpServlet.java:840)
at com.sun.web.core.ServletWrapper.handleRequest
(ServletWrapper.java:155
)
at com.sun.web.core.Context.handleRequest
(Context.java:414)
at com.sun.web.server.ConnectionHandler.run
(ConnectionHandler.java:139)
HANDLER THREAD PROBLEM: java.net.SocketException: Socket is closed
java.net.SocketException: Socket is closed
at java.net.Socket.getInputStream(Socket.java:698)
at com.sun.web.server.ConnectionHandler.run
(ConnectionHandler.java:161)
到底怎莫回事??请高手们指点迷津,小弟不胜感激!!!
问题二: JavaScript的判断是否为空(例如isEmpty())到底放在哪里?
我觉得应放在HTML语句后面,因为最后提交时才发生判断,但是学
习资料是放在前面