spring_SSH整合之_架构的历史(架构整合JSP+Hibernate+Spring+Struts2+DTO)_9

ゝ一世哀愁。 2022-06-15 08:54 150阅读 0赞

**Struts2中使用Action的类型重定向,jsp页面取不到list值**

package com.bjsxt.registration.action;
    
    import java.util.List;
    
    import org.springframework.context.ApplicationContext;
    
    import com.bjsxt.registration.model.User;
    import com.bjsxt.registration.service.UserManager;
    import com.bjsxt.registration.vo.UserRegisterInfo;
    import com.opensymphony.xwork2.ActionContext;
    import com.opensymphony.xwork2.ActionSupport;
    import com.opensymphony.xwork2.ModelDriven;
    
    public class UserAction extends ActionSupport implements
    		ModelDriven<UserRegisterInfo> {
    	private UserRegisterInfo info;
    	private UserManager userManager;
    	private List<User> users;
    
    	public UserRegisterInfo getInfo() {
    		return info;
    	}
    
    	public void setInfo(UserRegisterInfo info) {
    		this.info = info;
    	}
    
    	public UserManager getUserManager() {
    		return userManager;
    	}
    
    	public void setUserManager(UserManager userManager) {
    		this.userManager = userManager;
    	}
    
    	public List<User> getUsers() {
    		return users;
    	}
    
    	public void setUsers(List<User> users) {
    		this.users = users;
    	}
    
    	@Override
    	public String execute() throws Exception {
    		User user = new User();
    		user.setUsername(info.getUsername());
    		user.setPassword(info.getPassword());
    		if (userManager.exists(user)) {
    			return "FAIL";
    		}
    		userManager.add(user);
    		return "SUCCESS";
    	}
    
    	public UserRegisterInfo getModel() {
    		return info;
    	}
    
    	public String list() {
    		this.users = this.userManager.getUsers();
    		return "LIST";
    	}
    }

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE struts PUBLIC
    	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    	"http://struts.apache.org/dtds/struts-2.3.dtd">
    
    <struts>
    	
    	<constant name="struts.i18n.encoding" value="UTF-8" />
    	
    	<constant name="struts.objectFactory.spring.autoWire" value="type" />
    	
    	<constant name="struts.dewMode" value="true" />
    
    	<package name="registration" namespace="/bjsxt" extends="struts-default">
    		<action name="user_*" class="com.bjsxt.registration.action.UserAction"
    			method="{1}">
    			<result name="SUCCESS">/registSuccess.jsp</result>
    			<result name="FAIL">/registFail.jsp</result>
    			
    			
    			<result name="LIST">/userlist.jsp</result>
    		</action>
    	</package>
    
    </struts>

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
    <%@ taglib uri="/struts-tags" prefix="s"%>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
    <head>
    
    <title>用户列表</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    </head>
    
    <body>
    	<table align="center" border="1">
    		<tr>
    			<th>用户名</th>
    			<th>密码</th>
    		</tr>
    		<s:iterator value="users">
    			<tr>
    				<td><s:property value="username" /></td>
    				<td><s:property value="password" /></td>
    			</tr>
    		</s:iterator>
    	</table>
    	<s:debug></s:debug>
    </body>
    </html>

=======================================================
    DTO= Data Transfer Object
    数据传输对象
    VO = Value Object
    值对象
    
    =======================================================
    界面原型
    实体类package com.bjsxt.registration.vo;
    
    public class UserRegisterInfo {
    	private String username;
    	private String password;
    	private String password2;
    
    	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 getPassword2() {
    		return password2;
    	}
    
    	public void setPassword2(String password2) {
    		this.password2 = password2;
    	}
    
    }
    package com.bjsxt.registration.action;
    
    import com.bjsxt.registration.model.User;
    import com.bjsxt.registration.service.UserManager;
    import com.bjsxt.registration.vo.UserRegisterInfo;
    import com.opensymphony.xwork2.ActionSupport;
    import com.opensymphony.xwork2.ModelDriven;
    
    @SuppressWarnings("serial")
    // 如果要使用模型驱动,得实现ModelDriven里面的getModel(DTO)
    // >>>它是Struts2种独有的一种接收用户输入的机制，想在项目中使用模型驱动
    // >>>(ModelDriven)需要让Action实现com.opensymphony.xwork2.ModelDriven 接口，使用它
    // >>>的getModel()方法来通知Struts2要注入的属性类型，并且声明属性时一定要实例化,但不需get，
    // >>>set方法。
    public class UserAction extends ActionSupport implements
    		ModelDriven
       
         {
    	private UserRegisterInfo info;
    	private UserManager userManager;
    
    	public UserManager getUserManager() {
    		return userManager;
    	}
    
    	public void setUserManager(UserManager userManager) {
    		this.userManager = userManager;
    	}
    
    	public UserRegisterInfo getInfo() {
    		return info;
    	}
    
    	public void setInfo(UserRegisterInfo info) {
    		this.info = info;
    	}
    
    	@Override
    	public String execute() throws Exception {
    		User user = new User();
    		user.setUsername(info.getUsername());
    		user.setPassword(info.getPassword());
    		if (userManager.exists(user)) {
    			return "FAIL";
    		}
    		userManager.add(user);
    		return "SUCCESS";
    	}
    
    	public UserRegisterInfo getModel() {
    		return info;
    	}
    }