Jsp --- set attributes of javaBean

Last Update:2013-12-09 Source: Internet

Author: User

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In jsp, the <jsp: setProperty> action command is used to set the JavaBean attribute. There are four formats.

<Jsp: setProperty name = "instantiated Object name" property = "*"/>

In this method, "*" indicates that the JavaBean attribute is set based on all parameters passed in the form. The passed parameter value must be consistent with the attribute name in the JavaBean.

01
<% @ Page language = "java" contentType = "text/html; charset = gb2312" %>
02
<% @ Page import = "java. SQL. *" %>
03
<! DOCTYPE html>
04
<Html>
05
<Head>
06
<Title> User form </title>
07
</Head>
08
<Body>
09
<Form action = "SetPropertyDemo. jsp" method = "post">
10
<Table>
11
<Tr> <td colspan = "2"> User forms </td> </tr>
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<Tr> <td> User name: </td> <input type = "text" name = "username"/> </td> </tr>
13
<Tr> <td> User password: </td> <input type = "password" name = "password"/> </td> </tr>
14
<Tr> <td colspan = "2"> <input type = "submit"> <input type = "reset"/> </td> </tr>
15
<Tr> </tr>
16
</Table>
17
</Form>
18
</Body>
19
</Html>
01
<% @ Page language = "java" contentType = "text/html; charset = gb2312" %>
02
<! DOCTYPE html>
03
<Html>
04
<Head>
05
<Title> set JavaBean attributes </title>
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</Head>
07
<Body>
08
<% -- Call JavaBean through useBean Action Command -- %>
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<Jsp: useBean id = "user" scope = "page" class = "com. javaweb. ch07.UserBean"> </jsp: useBean>
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<% -- Set attributes in JavaBean based on all parameters -- %>
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<Jsp: setProperty name = "user" property = "*"/>
12
<%
13
// Print the username of the output user
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Out. println ("username:" + user. getUsername () + "<br/> ");
15
// Print the output user password
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Out. println ("user Password:" + user. getPassword () + "<br/> ");
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%>
18
</Body>
19
</Html>
<Jsp: setProperty name = "instantiated Object name" property = "property name"/>

The form submission page is the same as above.

01
<% @ Page language = "java" contentType = "text/html; charset = gb2312" %>
02
<! DOCTYPE html>
03
<Html>
04
<Head>
05
<Title> set JavaBean attributes </title>
06
</Head>
07
<Body>
08
<% -- Call JavaBean through useBean Action Command -- %>
09
<Jsp: useBean id = "user" scope = "page" class = "com. javaweb. ch07.UserBean"> </jsp: useBean>
10
<% -- Set attributes in JavaBean based on all parameters -- %>
11
<Jsp: setProperty name = "user" property = "username"/>
12
<%
13
// Print the username of the output user
14
Out. println ("username:" + user. getUsername () + "<br/> ");
15
// Print the output user password
16
Out. println ("user Password:" + user. getPassword () + "<br/> ");
17
%>
18
</Body>
19
</Html>
<Jsp: setProperty name = "instantiate Object name" property = "property name" param = "parameter name"/>

01
<% @ Page language = "java" contentType = "text/html; charset = gb2312" %>
02
<% @ Page import = "java. SQL. *" %>
03
<! DOCTYPE html>
04
<Html>
05
<Head>
06
<Title> User form </title>
07
</Head>
08
<Body>
09
<Form action = "SetPropertyDemo. jsp" method = "post">
10
<Table>
11
<Tr> <td colspan = "2"> User forms </td> </tr>
12
<Tr> <td> User name: </td> <input type = "text" name = "username"/> </td> </tr>
13
<Tr> <td> User password: </td> <input type = "password" name = "userpassword"/> </td> </tr>
14
<Tr> <td colspan = "2"> <input type = "submit"> <input type = "reset"/> </td> </tr>
15
<Tr> </tr>
16
</Table>
17
</Form>
18
</Body>
19
</Html>
Note the name attribute of the password form.
01
<% @ Page language = "java" contentType = "text/html; charset = gb2312" %>
02
<! DOCTYPE html>
03
<Html>
04
<Head>
05
<Title> set JavaBean attributes </title>
06
</Head>
07
<Body>
08
<% -- Call JavaBean through useBean Action Command -- %>
09
<Jsp: useBean id = "user" scope = "page" class = "com. javaweb. ch07.UserBean"> </jsp: useBean>
10
<% -- Set attributes in JavaBean based on all parameters -- %>
11
<Jsp: setProperty name = "user" property = "username" param = "username"/>
12
<Span style = "color: # e53333;"> <jsp: setProperty name = "user" property = "<span style =" color: #003399; "> password </span>" param = "<span style =" color: #003399; "> userpassword </span>"/> </span> <%
13
// Print the username of the output user
14
Out. println ("username:" + user. getUsername () + "<br/> ");
15
// Print the output user password
16
Out. println ("user Password:" + user. getPassword () + "<br/> ");
17
%>
18
</Body>
19
</Html>
Pay attention to the blue part in red in the above Code. www.2cto.com is more flexible.
<Jsp: setProperty name = "instantiate Object name" property = "property name" value = "property value"/>

01
<% @ Page language = "java" contentType = "text/html; charset = gb2312" %>
02
<! DOCTYPE html>
03
<Html>
04
<Head>
05
<Title> set JavaBean attributes </title>
06
</Head>
07
<Body>
08
<% -- Call JavaBean through useBean Action Command -- %>
09
<Jsp: useBean id = "user" scope = "page" class = "com. javaweb. ch07.UserBean"> </jsp: useBean>
10
<% -- Set attributes in JavaBean based on all parameters -- %>
11
<Jsp: setProperty name = "user" property = "username" value = "Devidpeng"/>
12
<Jsp: setProperty name = "user" property = "password" value = "Devidpeng"/>
13
<%
14
// Print the username of the output user
15
Out. println ("username:" + user. getUsername () + "<br/> ");
16
// Print the output user password
17
Out. println ("user Password:" + user. getPassword () + "<br/> ");
18
%>
19
</Body>
20
</Html>

From Zhang Dapeng's blog

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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Jsp --- set attributes of javaBean

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