The use of jsp tags
- 2020-05-26 09:55:45
- OfStack
Entity bean is defined in jsp
<
jsp:useBean id="clu" class="cn.domain.CacluBean"
>
<
/jsp:useBean
>
<
jsp:getProperty property="propertyname" name = "clu"
>
Get the property value of bean and output the value to the page;
EL expression :${entity object name}
When the el expression is used to fetch data, it is usually used with the. Sign, and the. Sign.
data pageContext. findAttribute (" "); / / page request session, application find order
<
! -- when looking for bean in page, if not, create an bean --
>
<
! Content in the body of the tag is used only when bean is created (instantiated)
>
jsp is assigned to bean:
<
! -- manual assignment --
>
<
jsp:setProperty property="age" name="personbean" value="23" /
>
<
! -- request parameter assignment, request data support string conversion to 8 basic data types --
>
<
jsp:setProperty property="age" name="personbean" param="age" /
>
<
jsp:setProperty property="birthdty" name="personbean" value="
<
%=new Date() %
>
" /
>
< jsp:setProperty property="*" name="clu" > Set the properties of bean and assign bean with all request parameters;
// import Java class:
<
%@ page import="cn.domain.*"%
>
<
! -- static include: include at compile time, compile all jsp included into one servlet, the efficiency performance is better than dynamic include --
>