How to assign value to input box in jsp

Jsp method of assigning value to the input box: 1. Direct assignment through value; 2. Assign value to the input box through param, which is the assignment method when the name is different from the attribute name; 3. Through "*" Method assignment, this method is to assign all values ​​with the same name and attribute name.

This article will introduce several JSP page assignments to input methods for your reference.

1.value
Description: The most direct way to assign value

value赋值<br/>
<jsp:useBean id="ls" class="model.Employee" scope="session" />
<jsp:setProperty property="id" name="ls" value="1002"/>
<jsp:setProperty property="name" name="ls" value="李四"/>
<jsp:setProperty property="departmentName" name="ls" value="人事部"/>

员工编号：<jsp:getProperty property="id" name="ls"/><br/>
员工姓名：<jsp:getProperty property="name" name="ls" /><br/>
员工部门：<jsp:getProperty property="departmentName" name="ls" />

2.param
Description: When name and attribute Assignment method when the names are different

<jsp:useBean id="employee" class="model.Employee" scope="session" />
<form action="<%=request.getContextPath()%>/jsp/test_getValue.jsp">
员工编号<input value="" name="id_text" /><br/>
员工姓名<input value="" name="name_text" /><br/>
员工部门<input value="" name="departmentName_text" /><br/>
<input type="submit" value="提交" />
</form>

 <jsp:useBean id="employee" class="model.Employee" scope="session" />
param赋值<br/>
<jsp:setProperty property="id" name="employee" param="id_text"/>
<jsp:setProperty property="name" name="employee" param="name_text"/>
<jsp:setProperty property="departmentName" name="employee" param="departmentName_text"/>

员工编号：<jsp:getProperty property="id" name="employee" /><br/>
员工姓名：<jsp:getProperty property="name" name="employee" /><br/>
员工部门：<jsp:getProperty property="departmentName" name="employee" /><hr/>

3.*
Description: Assign all values ​​with the same name and attribute name

<jsp:useBean id="employee" class="model.Employee" scope="session" />
<form action="<%=request.getContextPath()%>/jsp/test_getValue.jsp">
员工编号<input value="" name="id" /><br/>
员工姓名<input value="" name="name" /><br/>
员工部门<input value="" name="departmentName" /><br/>
<input type="submit" value="提交" />
</form>

<jsp:useBean id="employee" class="model.Employee" scope="session" />
<jsp:setProperty property="*" name="employee"/>

员工编号：<jsp:getProperty property="id" name="employee" /><br/>
员工姓名：<jsp:getProperty property="name" name="employee" /><br/>
员工部门：<jsp:getProperty property="departmentName" name="employee" />

include directive The difference from action elements

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1.The include directive is called a static include; the include action element is called a dynamic include

2. The include instruction cannot pass parameters, and an error will be reported; the include action element can

3. The attributes are different, the include instruction is file; the include action element is page, flush

4. The include directive file contains only one servlet and class generated; the include action element generates respective servlets and classes

5. The introduction time is different, the include directive is introduced at startup; the include action element is triggered when It will be introduced only when

6. The two files of the include directive share one request; the include action element has two requests

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