属性驱动：
LoginAction.java:
public class LoginAction extends ActionSupport implements ModelDriven<User>{
private User mdoel = new User();
@Override
public User getModel() {
// TODO Auto-generated method stub
return this.mdoel;
}
public String login(){
System.out.println(this.getModel().getUsername());
System.out.println(this.getModel().getPassword());
return SUCCESS;
}
}
User.java:
public class User {
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
struts.xml
<?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>
<!--
常量
用来改变default.properties文件中的常量的设置
-->
<constant name="struts.ui.theme" value="simple"></constant>
<!--
一般在开发的情况下，设置struts.devMode为true,这样修改完xml文件以后不用重新启动了
-->
<constant name="struts.devMode" value="true"/>
<include file="struts-modeldriver.xml"></include>
</struts>
struts-modeldriver.xml:
<?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>
<package name="login" namespace="/" extends="struts-default">
<action name="loginAction_*" method="{1}" class="com.leaf.struts.action.LoginAction">
<result>index.jsp</result>
</action>
</package>
</struts>
web.xml中加入过滤器:
<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>
login.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
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>My JSP 'index.jsp' starting page</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>
<s:form action="loginAction_login.action">
<table>
<tr>
<td>用户名</td>
<td><s:textfield name="username"/></td>
</tr>
<tr>
<td>密码</td>
<td><s:password name="password"/></td>
</tr>
<tr>
<td></td>
<td><s:submit/></td>
</tr>
</table>
</s:form>
</body>
</html>
原理图如下：
注意事项：
1、 必须使用struts2默认的拦截器栈中的ParameterInterceptor
2、 Action中的属性和表单中的name属性的值保持一致
3、 利用valueStack.setValue方法可以赋值了
模型驱动：
LoginAction.java:
public class LoginAction extends ActionSupport{
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String login(){
System.out.println(this.username);
System.out.println(this.password);
return SUCCESS;
}
}
struts.xml:
<?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>
<!--
常量
用来改变default.properties文件中的常量的设置
-->
<constant name="struts.ui.theme" value="simple"></constant>
<!--
一般在开发的情况下，设置struts.devMode为true,这样修改完xml文件以后不用重新启动了
-->
<constant name="struts.devMode" value="true"/>
<include file="struts-propertydriver.xml"></include>
</struts>
struts-propertydriver.xml:
<?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>
<package name="login" namespace="/" extends="struts-default">
<action name="loginAction_*" method="{1}" class="com.leaf.struts.action.LoginAction">
<result>index.jsp</result>
</action>
</package>
</struts>
web.xml中加入过滤器：
<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>
login.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
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>My JSP 'index.jsp' starting page</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>
<s:form action="loginAction_login.action">
<table>
<tr>
<td>用户名</td>
<td><s:textfield name="username"/></td>
</tr>
<tr>
<td>密码</td>
<td><s:password name="password"/></td>
</tr>
<tr>
<td></td>
<td><s:submit/></td>
</tr>
</table>
</s:form>
</body>
</html>
原理图如下：
从上图可以看出，ModelDriverInterceptor有两个作用：
1、 当前请求的action必须实现ModelDriver接口
2、 把model对象放入到了栈顶
Struts2中属性驱动与模型驱动,布布扣,bubuko.com
时间： 2024-10-18 12:44:53