我搜索过这个问题,有一些答案,但不完全是我的问题.所以这是我的jsp代码:
<body>
<%
if (manager.isValid(request.getParameter("username"),request.getParameter("password"))){
out.print("<h1> Welcome ");
out.print(request.getParameter("username") + "</h1>");
} else {
out.print("<h1> Please Try Again </h1> <br />");
out.print("Either your username or password is incorrect. Please Try again <br /> <br />");
}
%>
<%@ include file="LoginForm.html" %>
但不是这个,我想只在"else"块中包含"loginForm.html".我该怎么做？当然这不起作用,但你会猜到我想要的:
<%
if (manager.isValid(request.getParameter("username"),request.getParameter("password"))){
out.print("<h1> Welcome ");
out.print(request.getParameter("username") + "</h1>");
} else {
out.print("<h1> Please Try Again </h1> <br />");
out.print("Either your username or password is incorrect. Please Try again <br /> <br />");
include file="LoginForm.html" ;
}
%>
我正在研究Android项目.我的一个活动有内部类ChatHistoryAdapter.当活动开始时,列表会正确显示,但滚动后,某些项目会重复.我搜索过解决方案,但几乎每个解决方案都是setTag()或Inflater.我觉得我的代码对他们来说还行.所以我真的不明白这里的问题是什么......
private class ChatHistoryAdapter extends BaseAdapter {
private LayoutInflater inflater;
public ChatHistoryAdapter( LayoutInflater inflater) {
this.inflater = inflater;
}
public void newOne() {
notifyDataSetChanged();
}
@Override
public int getCount() {
return messages.size();
}
@Override
public Object getItem(int i) {
return messages.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int position, View myView, ViewGroup vg) {
MessageHolder messageHolder;
if (myView == null){
myView = this.inflater.inflate(R.layout.chat_list_item, null, false);
messageHolder = new MessageHolder();
messageHolder.hisTxt = (TextView)myView.findViewById(R.id.hisText);
messageHolder.myTxt …我想检查表中是否插入了有效的电话号码，所以我的触发代码在这里：
select start_index
into mob_index
from gmarg_mobile_operators
where START_INDEX = substr(:new.contact_info,0,3);
if (REGEXP_LIKE (:NEW.CONTACT_INFO,'^(?:'|| mob_index ||')[\-,\:]{0,1}[0-9][0-9][\-,\:]{0,1}[0-9][0-9][\-,\:]{0,1}[0-9][0-9]')) then
found := 1;
end if;
我检查了我的正则表达式：“^(?:555)[-,:]{0,1}[0-9][0-9][-,:]{0,1}[0-9][ 0-9][-,:]{0,1}[0-9][0-9]"在几个在线工具上都是正确的。
当我运行触发器时，它编译成功，但在插入行期间显示以下错误：
insert into GMARG_CONTACTS
(CLINET_ID,CONTACT_INFO,contact_type_id)
values
(0,'555194117','Mobile')
Error report -
SQL Error: ORA-12728: invalid range in regular expression
ORA-06512: at "HR.GMARG_TRIGGER_CONTACT", line 12
ORA-04088: error during execution of trigger 'HR.GMARG_TRIGGER_CONTACT'
12728. 00000 - "invalid range in regular expression"
*Cause: An invalid range was found in the regular expression.
*Action: Ensure a valid range is being used. …