Struts2中Action接收参数的方法

心已赠人 2022-09-28 05:47 241阅读 0赞

引用：[http://hwy1782.javaeye.com/blog/701904][http_hwy1782.javaeye.com_blog_701904]

Struts2中Action接收参数的方法主要有以下三种：  
1.使用Action的属性接收参数：  
    a.定义：在Action类中定义属性，创建get和set方法；  
    b.接收：通过属性接收参数，如：userName；  
    c.发送：使用属性名传递参数，如：user1!add?userName=Magci；  
2.使用DomainModel接收参数：  
    a.定义：定义Model类，在Action中定义Model类的对象（不需要new），创建该对象的get和set方法；  
    b.接收：通过对象的属性接收参数，如：user.getUserName()；  
    c.发送：使用对象的属性传递参数，如：user2!add?user.userName=MGC；  
3.使用ModelDriven接收参数：  
    a.定义：Action实现ModelDriven泛型接口，定义Model类的对象（必须new），通过getModel方法返回该对象；  
    b.接收：通过对象的属性接收参数，如：user.getUserName()；  
    c.发送：直接使用属性名传递参数，如：user2!add?userName=MGC；  
  
实例：  
  
web.xml:

Java代码 ![复制代码][Image 1]

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:

写道

<?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.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代码 ![复制代码][Image 1]

1.  **package** cn.edu.ahau.mgc.struts2.mode;   
2.    
3.  **public** **class** User \{   
4.    
5.      **private** String userName;   
6.      **private** String password;   
7.         
8.      **public** String getUserName() \{   
9.          **return** **this**.userName;   
10.     \}   
11.        
12.     **public** **void** setUserName(String userName) \{   
13.         **this**.userName = userName;   
14.     \}   
15.        
16.     **public** String getPassword() \{   
17.         **return** **this**.password;   
18.     \}   
19.        
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:

写道

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:

写道

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 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:

写道

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 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:

写道

<%@ 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"> 
 
</head> 
 
<body> 
<a href="user1!add?userName=Magci&password=123456">user1!add?userName=Magci&password=123456</a> 
 
 
 
<a href="user2!add?user.userName=MGC&user.password=abc">user2!add?user.userName=MGC&user.password=abc</a> 
 
 
 
<a href="user3!add?userName=MaGC&password=000000">user3!add?userName=MaGC&password=000000</a> 
</body> 
</html>

addSuccess.jsp:

Java代码 ![复制代码][Image 1]

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. %>   
6.   
7. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">   
8. <html>   
9.   <head>   
10.     <base href="<%=basePath%>">   
11.        
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.        
21.   </head>   
22.      
23.   <body>   
24.     User Add Success!    
25.   </body>   
26. </html>

[http_hwy1782.javaeye.com_blog_701904]: http://hwy1782.javaeye.com/blog/701904
[Image 1]: