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https://blog.csdn.net/sunshoupo211/article/details/30249239
1.将Action类作为一个POJO，直接进行接收
在Action类内部定义字段名称。并为之声明get/set方法。
页面表单
name属性与定义字段名称同样。package com.common.login;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
public class LoginAction extends ActionSupport{
private String name;
private String password;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public void showInfo()
{
System.out.println("name:"+this.name+" password"+this.password);
}
}
jsp页面代码
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Login Page</title>
</head>
<body>
<form action="/struts_web/common/login!login" method="post">
<s:textfield name="name" label="name"></s:textfield>
<s:password name="password" label="password"></s:password>
<s:submit label="submit"></s:submit>
</form>
</body>
</html>
2．定义一个Bean对象。通过Bean进行传递接收
上述方法是最经常使用的一种方式，可是这种方法有个缺点：当属性较多时，Action类显得比較臃肿。
另外一种方法须要我们定义一个DTO对象（普通的JavaBean）
package com.common.login;
public class UserBean {
private String name;
private String password;
public void setName(String name)
{
this.name = name;
}
public String getName()
{
return name;
}
public void setPassword(String password)
{
this.password = password;
}
public String getPassword()
{
return password;
}
}
然后将该DTO对象组合到Action中，声明相应的get/set方法
package com.common.login;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
public class LoginAction extends ActionSupport{
private UserBean bean;
public UserBean getBean() {
return bean;
}
public void setBean(UserBean bean) {
this.bean = bean;
}
public void showInfo()
{
System.out.println("name:"+bean.getName()+" password"+bean.getPassword());
}
}
此时页面应该改动为
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Login Page</title>
</head>
<body>
<form action="/struts_web/common/login!login" method="post">
<s:textfield name="bean.name" label="name"></s:textfield>
<s:password name="bean.password" label="password"></s:password>
<s:submit label="submit"></s:submit>
</form>
</body>
</html>
3．使用Struts2的ModelDriven模式进行传递
另外一种方式提供了一个比較简洁的表单数据接收方式，可是Action类是变得简洁了。可是页面变得相对复杂了很多。
以下提供一种ModelDriven模式的解决方式
使用ModelDriven方式，首先要实现ModelDriven接口和getModel方法
package com.common.login;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
@SuppressWarnings("serial")
public class LoginAction extends ActionSupport implements ModelDriven<UserBean>{
private UserBean bean;
@Override
public UserBean getModel() {
if(bean==null)
{
bean = new UserBean();
}
return bean;
}
public void showInfo()
{
System.out.println("name:"+bean.getName()+" password"+bean.getPassword());
}
}<span style="font-size:18px;">
</span>
页面就能够改回一開始的处理方式
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Login Page</title>
</head>
<body>
<form action="/struts_web/common/login!login" method="post">
<s:textfield name="name" label="name"></s:textfield>
<s:password name="password" label="password"></s:password>
<s:submit label="submit"></s:submit>
</form>
</body>
</html><span style="font-size:18px;">
</span>
注意：当返回result前对业务对象改动了，可是值栈中相应的对象依旧是之前的就值，若想在返回result之前刷新值栈中业务对象各个属性的根对象，需在该action中配置例如以下參数：
<action name="login" class="com.common.login.LoginAction">
<interceptor-ref name="defaultStack">
<param name="modelDriven.refreshModelBeforeResult">true</param>
</interceptor-ref>
<result name="login">/pages/common/login/login.jsp</result>
<result name="success">/pages/common/login/success.jsp</result>
<result name="error">/pages/common/login/error.jsp</result>
</action>