Method for accepting parameters for actions in struts2

In struts2, three methods are used to receive parameters for an action:
1. Use the property of action to receive parameters:
A. Definition: Define attributes in the action class and create get and set methods;
B. Receive: receive parameters through properties, such as username;
C. Send: use the property name to pass parameters, for example, user1! ADD? Username = magci;
2. Use domainmodel to receive parameters:
A. Define: Define the model class. In the action, define the object of the model class (New is not required) and create the get and set methods of the object;
B. Receive: parameters are received through object attributes, such as user. GetUserName ();
C. Send: Use the object property to pass parameters, such as user2! ADD? User. Username = MGC;
3. Use modeldriven to receive parameters:
A. Definition: Action implements the modeldriven generic interface, defines the object of the model class (must be new), and returns the object through the GetModel method;
B. Receive: parameters are received through object attributes, such as user. GetUserName ();
C. Send: directly use the property name to pass the parameter, for example, user2! ADD? Username = MGC;

Instance:

Web. xml:

 

Java code

1. <? XML version = "1.0" encoding = "UTF-8"?>
2. <Web-app version = "2.5"
3. Xmlns = "http://java.sun.com/xml/ns/javaee"
4. Xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance"
5. Xsi: schemalocation = "http://java.sun.com/xml/ns/javaee
6. Http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd>
7. <Welcome-file-List>
8. <Welcome-File> hello. jsp </welcome-File>
9. </Welcome-file-List>
10. <Filter>
11. <Filter-Name> struts2 </filter-Name>
12. <Filter-class> org. Apache. struts2.dispatcher. Ng. Filter. strutsprepareandexecutefilter </filter-class>
13. </Filter>
14. <Filter-mapping>
15. <Filter-Name> struts2 </filter-Name>
16. <URL-pattern>/* </url-pattern>
17. </Filter-mapping>
18. </Web-app>

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5"     xmlns="http://java.sun.com/xml/ns/javaee"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">  <welcome-file-list>    <welcome-file>hello.jsp</welcome-file>  </welcome-file-list>  <filter>    <filter-name>struts2</filter-name>    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>  </filter>  <filter-mapping>    <filter-name>struts2</filter-name>    <url-pattern>/*</url-pattern>  </filter-mapping></web-app>

 

Struts. xml:

 

Write <? XML version = "1.0" encoding = "UTF-8"?>
<! Doctype struts public
"-// Apache Software Foundation // DTD struts configuration 2.0 // en"
Http://struts.apache.org/dtds/struts-2.0.dtd>

<Struts>
<! --
<Constant name = "struts. Enable. dynamicmethodinvocation" value = "false"/>
<Constant name = "struts. devmode" value = "false"/>

<Include file = "example. xml"/>

<Package name = "default" namespace = "/" extends = "struts-Default">
<Default-action-ref name = "Index"/>
<Action name = "Index">
<Result type = "redirectaction">
<Param name = "actionname"> helloworld </param>
<Param name = "namespace">/example </param>
</Result>
</Action>
</Package>
-->

<! -- Add packages here -->
<Constant name = "struts. devmode" value = "true"/>
<Package name = "user" namespace = "/" extends = "struts-Default">
<Action name = "User *" class = "cn.edu. ahau. MGC. struts2.action. useraction {1}">
<Result>/addsuccess. jsp </result>
</Action>
</Package>
</Struts>
 

 

User. Java:

 

Java code

1. Package cn.edu. ahau. MGC. struts2.mode;
3. Public class user {
5. Private string username;
6. Private string password;
8. Public String GetUserName (){
9. Return this. Username;
10. }
12. Public void setusername (string username ){
13. This. Username = username;
14. }
16. Public String GetPassword (){
17. Return this. Password;
18. }
20. Public void setpassword (string password ){
21. This. Password = password;
22. }
23. }

package cn.edu.ahau.mgc.struts2.mode;public class User {    private String userName;    private String password;        public String getUserName() {        return this.userName;    }        public void setUserName(String userName) {        this.userName = userName;    }        public String getPassword() {        return this.password;    }        public void setPassword(String password) {        this.password = password;    }}

 

Useraction1.java:

 

Write package cn.edu. ahau. MGC. struts2.action;

Import com. opensymphony. xwork2.actionsupport;

Public class useraction1 extends actionsupport {

Private string username;
Private string password;

Public String add (){
System. Out. println ("username:" + username );
System. Out. println ("Password:" + password );
Return success;
}

Public String GetUserName (){
Return this. Username;
}

Public void setusername (string username ){
This. Username = username;
}

Public String GetPassword (){
Return this. Password;
}

Public void setpassword (string password ){
This. Password = password;
}
}
 

 

Useraction2.java:

 

 

Write package cn.edu. ahau. MGC. struts2.action;

Import com. opensymphony. xwork2.actionsupport;

Import cn.edu. ahau. MGC. struts2.mode. user;

Public class useraction2 extends actionsupport {

Private user;

Public String add (){
System. Out. println ("username:" + User. GetUserName ());
System. Out. println ("Password:" + User. GetPassword ());
Return success;
}

Public user getuser (){
Return this. user;
}

Public void setuser (User user ){
This. User = user;
}

}
 

 

Useraction3.java:

 

 

Write package cn.edu. ahau. MGC. struts2.action;

Import cn.edu. ahau. MGC. struts2.mode. user;

Import com. opensymphony. xwork2.actionsupport;
Import com. opensymphony. xwork2.modeldriven;

Public class useraction3 extends actionsupport implements modeldriven <user> {

Private user = new user ();

Public String add (){
System. Out. println ("username:" + User. GetUserName ());
System. Out. Print ("Password:" + User. GetPassword ());
Return success;
}

Public user GetModel (){
Return this. user;
}

}
 

 

Index. jsp:

 

Wrote <% @ page Language = "Java" Import = "Java. util. *" pageencoding = "gb18030" %>
<%
String Path = request. getcontextpath ();
String basepath = request. getscheme () + ": //" + request. getservername () + ":" + request. getserverport () + path + "/";
%>

<! Doctype HTML public "-// W3C // dtd html 4.01 transitional // en">
<HTML>
<Head>
<Base href = "<% = basepath %>">

<Title> param </title>
<Meta http-equiv = "Pragma" content = "no-Cache">
<Meta http-equiv = "cache-control" content = "no-Cache">
<Meta http-equiv = "expires" content = "0">
<Meta http-equiv = "keywords" content = "keyword1, keyword2, keyword3">
<Meta http-equiv = "Description" content = "this is my page">
<! --
<LINK rel = "stylesheet" type = "text/CSS" href = "styles.css">
-->
</Head>

<Body>
<A href = "user1! ADD? Username = magci & Password = 123456 "> user1! ADD? Username = magci & Password = 123456 </a>
<Br/>
<Br/>

<A href = "user2! ADD? User. Username = MGC & User. Password = ABC "> user2! ADD? User. Username = MGC & User. Password = ABC </a>
<Br/>
<Br/>

<A href = "user3! ADD? Username = magc & Password = 000000 "> user3! ADD? Username = magc & Password = 000000 </a>
</Body>
</Html>
 

Addsuccess. jsp:

 

Java code

1. <% @ Page Language = "Java" Import = "Java. util. *" pageencoding = "gb18030" %>
2. <%
3. String Path = request. getcontextpath ();
4. String basepath = request. getscheme () + ": //" + request. getservername () + ":" + request. getserverport () + path + "/";
5. %>
7. <! Doctype HTML public "-// W3C // dtd html 4.01 transitional // en">
8. <HTML>
9. <Head>
10. <Base href = "<% = basepath %>">
12. <Title> addsuccess </title>
13. <Meta http-equiv = "Pragma" content = "no-Cache">
14. <Meta http-equiv = "cache-control" content = "no-Cache">
15. <Meta http-equiv = "expires" content = "0">
16. <Meta http-equiv = "keywords" content = "keyword1, keyword2, keyword3">
17. <Meta http-equiv = "Description" content = "this is my page">
18. <! --
19. <LINK rel = "stylesheet" type = "text/CSS" href = "styles.css">
20. -->
21. </Head>
23. <Body>
24. User add success! <Br>
25. </Body>
26. </Html>

From: http://hwy1782.javaeye.com/blog/701904