} catch (SQLException e) { System.out.println("登录失败"+e);
}
改成
} catch (SQLException e) {
e.printStackTrace();
System.out.println("登录失败"+e);
}
} catch (SQLException e) {
System.out.println("取得boss表中的所有数据失败"+e);
} 改成:
} catch (SQLException e) {
e.printStackTrace();
System.out.println("取得boss表中的所有数据失败"+e);
}
去到Tocmat的logs文件夹里去查看错误信息
}
改成
} catch (SQLException e) {
e.printStackTrace();
System.out.println("登录失败"+e);
}
} catch (SQLException e) {
System.out.println("取得boss表中的所有数据失败"+e);
} 改成:
} catch (SQLException e) {
e.printStackTrace();
System.out.println("取得boss表中的所有数据失败"+e);
}
去到Tocmat的logs文件夹里去查看错误信息
2008-05-22 10:47:04 StandardContext[/jsp-examples]ContextListener: contextInitialized()
2008-05-22 10:47:04 StandardContext[/jsp-examples]SessionListener: contextInitialized()
2008-05-22 10:47:04 StandardContext[/servlets-examples]ContextListener: contextInitialized()
2008-05-22 10:47:04 StandardContext[/servlets-examples]SessionListener: contextInitialized()
2008-05-22 10:50:31 StandardContext[/balancer]org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]
2008-05-22 10:50:34 StandardContext[/jsp-examples]ContextListener: contextInitialized()
2008-05-22 10:50:34 StandardContext[/jsp-examples]SessionListener: contextInitialized()
2008-05-22 10:50:34 StandardContext[/servlets-examples]ContextListener: contextInitialized()
2008-05-22 10:50:34 StandardContext[/servlets-examples]SessionListener: contextInitialized()
2008-05-22 10:53:10 StandardContext[/balancer]org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]
2008-05-22 10:53:12 StandardContext[/jsp-examples]ContextListener: contextInitialized()
2008-05-22 10:53:12 StandardContext[/jsp-examples]SessionListener: contextInitialized()
2008-05-22 10:53:12 StandardContext[/servlets-examples]ContextListener: contextInitialized()
2008-05-22 10:53:12 StandardContext[/servlets-examples]SessionListener: contextInitialized()
2008-05-22 10:55:06 StandardContext[/balancer]org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]
2008-05-22 10:55:08 StandardContext[/jsp-examples]ContextListener: contextInitialized()
2008-05-22 10:55:08 StandardContext[/jsp-examples]SessionListener: contextInitialized()
2008-05-22 10:55:08 StandardContext[/servlets-examples]ContextListener: contextInitialized()
2008-05-22 10:55:08 StandardContext[/servlets-examples]SessionListener: contextInitialized()
2008-05-22 10:56:21 StandardContext[/balancer]org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]
2008-05-22 10:56:23 StandardContext[/jsp-examples]ContextListener: contextInitialized()
2008-05-22 10:56:23 StandardContext[/jsp-examples]SessionListener: contextInitialized()
2008-05-22 10:56:23 StandardContext[/servlets-examples]ContextListener: contextInitialized()
2008-05-22 10:56:23 StandardContext[/servlets-examples]SessionListener: contextInitialized()
2008-05-22 10:59:01 StandardContext[/servlets-examples]ContextListener: attributeReplaced('org.apache.catalina.WELCOME_FILES', '[Ljava.lang.String;@143073a')
2008-05-22 10:59:01 StandardContext[/servlets-examples]ContextListener: attributeReplaced('org.apache.catalina.WELCOME_FILES', '[Ljava.lang.String;@18facfb')
2008-05-22 10:59:01 StandardContext[/servlets-examples]ContextListener: attributeReplaced('org.apache.catalina.WELCOME_FILES', '[Ljava.lang.String;@1a59490')
2008-05-22 10:59:01 StandardContext[/servlets-examples]ContextListener: contextDestroyed()
2008-05-22 10:59:01 StandardContext[/jsp-examples]ContextListener: attributeReplaced('org.apache.catalina.WELCOME_FILES', '[Ljava.lang.String;@12022b7')
2008-05-22 10:59:01 StandardContext[/jsp-examples]ContextListener: attributeReplaced('org.apache.catalina.WELCOME_FILES', '[Ljava.lang.String;@c74910')
2008-05-22 10:59:01 StandardContext[/jsp-examples]ContextListener: attributeReplaced('org.apache.catalina.WELCOME_FILES', '[Ljava.lang.String;@18dfa76')
2008-05-22 10:59:01 StandardContext[/jsp-examples]SessionListener: contextDestroyed()
2008-05-22 10:59:01 StandardContext[/jsp-examples]ContextListener: contextDestroyed()
2008-05-22 10:59:16 StandardContext[/balancer]org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]
2008-05-22 10:59:19 StandardContext[/jsp-examples]ContextListener: contextInitialized()
2008-05-22 10:59:19 StandardContext[/jsp-examples]SessionListener: contextInitialized()
2008-05-22 10:59:19 StandardContext[/servlets-examples]ContextListener: contextInitialized()
2008-05-22 10:59:19 StandardContext[/servlets-examples]SessionListener: contextInitialized()
2008-05-22 11:01:39 StandardContext[/balancer]org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]
2008-05-22 11:01:41 StandardContext[/jsp-examples]ContextListener: contextInitialized()
2008-05-22 11:01:41 StandardContext[/jsp-examples]SessionListener: contextInitialized()
2008-05-22 11:01:41 StandardContext[/servlets-examples]ContextListener: contextInitialized()
2008-05-22 11:01:41 StandardContext[/servlets-examples]SessionListener: contextInitialized()
2008-05-22 11:03:40 StandardContext[/balancer]org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]
2008-05-22 11:03:42 StandardContext[/jsp-examples]ContextListener: contextInitialized()
2008-05-22 11:03:42 StandardContext[/jsp-examples]SessionListener: contextInitialized()
2008-05-22 11:03:42 StandardContext[/servlets-examples]ContextListener: contextInitialized()
2008-05-22 11:03:42 StandardContext[/servlets-examples]SessionListener: contextInitialized()
2008-05-22 11:04:52 StandardContext[/balancer]org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]
2008-05-22 11:04:54 StandardContext[/jsp-examples]ContextListener: contextInitialized()
2008-05-22 11:04:54 StandardContext[/jsp-examples]SessionListener: contextInitialized()
2008-05-22 11:04:54 StandardContext[/servlets-examples]ContextListener: contextInitialized()
2008-05-22 11:04:54 StandardContext[/servlets-examples]SessionListener: contextInitialized()
2008-05-22 11:06:46 StandardContext[/balancer]org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]
e.printStackTrace();
}
加个根异常捕捉,在控制台把错误贴出来
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setCharacterEncoding("gb2312");
request.setCharacterEncoding("gb2312");
PrintWriter out=response.getWriter();
String name=request.getParameter("txtName"); String pwd=request.getParameter("txtPwd");
bb.setName(name);
bb.setPwd(pwd); if(ob.doLogin(bb)){
out.print(" <script>alert('登录成功');location='MS' </script>");
} else{ out.print(" <script>alert('登录失败');location='index.jsp' </script>");
}