Struts2中Action接收參數(shù)的方法主要有以下三種：
1.使用Action的屬性接收參數(shù)：
? ?a.定義：在Action類中定義屬性，創(chuàng)建get和set方法；
? ?b.接收：通過屬性接收參數(shù)，如：userName；
? ?c.發(fā)送：使用屬性名傳遞參數(shù)，如：user1!add?userName=Magci；
2.使用DomainModel接收參數(shù)：
? ?a.定義：定義Model類，在Action中定義Model類的對象（不需要new），創(chuàng)建該對象的get和set方法；
? ?b.接收：通過對象的屬性接收參數(shù)，如：user.getUserName()；
? ?c.發(fā)送：使用對象的屬性傳遞參數(shù)，如：user2!add?user.userName=MGC；
3.使用ModelDriven接收參數(shù)：
? ?a.定義：Action實(shí)現(xiàn)ModelDriven泛型接口，定義Model類的對象（必須new），通過getModel方法返回該對象；
? ?b.接收：通過對象的屬性接收參數(shù)，如：user.getUserName()；
? ?c.發(fā)送：直接使用屬性名傳遞參數(shù)，如：user2!add?userName=MGC；

實(shí)例：

web.xml:

Java代碼

<?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> ?

[java]view plaincopy

<?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:

寫道<?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.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代碼

package cn.edu.ahau.mgc.struts2.mode; ?

publicclass User { ?

private String userName; ?

private String password; ?

public String getUserName() { ?

returnthis.userName; ?

? ?} ?

publicvoid setUserName(String userName) { ?

this.userName = userName; ?

? ?} ?

public String getPassword() { ?

returnthis.password; ?

? ?} ?

publicvoid setPassword(String password) { ?

this.password = password; ?

? ?} ?

} ?

[java]view plaincopy

package cn.edu.ahau.mgc.struts2.mode; ?

publicclass User { ?

private String userName; ?

private String password; ?

public String getUserName() { ?

returnthis.userName; ?

? ?} ?

publicvoid setUserName(String userName) { ?

this.userName = userName; ?

? ?} ?

public String getPassword() { ?

returnthis.password; ?

? ?} ?

publicvoid setPassword(String password) { ?

this.password = password; ?

? ?} ?

} ?

UserAction1.java:

寫道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:

寫道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:

寫道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:

寫道<%@ 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">
<!--
<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代碼

<%@ 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>AddSuccess</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> ?

? ?User Add Success! <br> ?

?</body> ?

</html> ?

轉(zhuǎn)載于:https://blog.51cto.com/lebron/1373552

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