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Organize the online cake mall project

2022-06-28 04:58:00 【The absolute wolf under the stars】

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Online cake mall project

Online cake mall project

Other intellectual

Shortcut key

ctrl+shift+T Accidentally close the browser to restore the shortcut key

front end

Components

flexSlider

Use of the picture rotation plug-in

Bootstrap frame

Bootstrap It is the most popular front-end component library in the world , For developing responsive layouts 、 Mobile device first WEB project .
Bootstrap It's a set for HTML、CSS and JS Open source toolset developed . Use what we offer Sass Variables and large numbers mixin、 Responsive grid system 、 Expandable prefabricated components 、 be based on jQuery Powerful plug-in system , Be able to quickly prototype your idea or build an entire app .

Use data-slide-to Here's a raw sliding index to the bottom of the carousel bed ,data-slide-to=“2” Will move the slider to a specific index , Index from 0 Start counting .

Bootstrap How to switch the navigation bar of active
Click to learn

Basic knowledge points

use li Labels and a Click on the tab to navigate the area
Click to learn

Back end

jsp

varStatus attribute

varStatus yes <c:forEach>jstl An attribute of the loop label
varStatus The function of attributes :
varStatus=“status” In fact, it defines a status Object named as varStatus The binding value of . The binding value is status Encapsulates the current traversal state , such as , You can see from this object how many elements have been traversed ：${status.count}

jsp:param action

When using <jsp:include> When an action tag introduces a program that can be executed dynamically , Such as Servlet or JSP page , By using <jsp:param> The action tag passes parameter information to the program .

#index.jsp
<body>
 Pass three numbers to order.jsp And display the results 
<jsp:include page="order.jsp">
<jsp:param name="m1" value="8"/>
<jsp:param name="m2" value="3"/>
<jsp:param name="m3" value="5"/>
</jsp:include>
</body>
#order.jsp
<body>
<%=m1%>、<%=m2%>、<%=m3%>
</body>
# The result is 8、3、5

Persistence layer

MapListHandler

MapListHandler Class implements the ResultSetHandler Interface
MapListHandler: Encapsulate the specified column value of each record in multiple records into a Map Collection ,Map Of key Is the column name ,Map Of value Is the column in the table The value of the record . And encapsulate multiple records into a single file containing Map Of List Collection .

10.java Several data objects in
explain
11.BeanUtils.copyProperties Usage of
BeanUtils It provides the right java Reflection and introspection API Packaging . There are many tools in it , Let's introduce copyProperties.
If we have two that have many of the same properties JavaBean, A very common situation is Struts Inside PO object （ Persistent object ） And corresponding ActionForm, use copyProperties, Just one line of code , And then it's done .

BeanUtils.copyProperties(" Class before conversion ", " The converted class ");

12.param
EL Expression implicit object ： Save all the request parameters Map object

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