Struts2 提供三种数据封装的方式
1. Action 本身作为model对象，通过成员setter方法进行封装
2. 创建独立model对象，页面通过ognl表达式封装
3. 实现ModelDriven接口，对请求数据进行封装
准备jsp文件：
form.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
</head>
<body>
<form action="${pageContext.request.contextPath}/formAction.action" method="post">
用户名：<input type="text" name="username" /> <br/>
密码：<input type="text" name="password" /> <br/>
<input type="submit" />
</form>
</body>
</html>
success.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
Hello Struts2
</body>
</html>
struts.xml文件的action 配置
<action name="formAction" class="com.my.action.FormAction">
<result name="success">/success.jsp</result>
</action>
- Action 本身作为model对象，通过成员setter方法进行封装
Action类的编写：
package com.my.action;
import com.opensymphony.xwork2.ActionSupport;
public class FormAction extends ActionSupport{
//必须提供相应的setter方法
private String username;
private String password;
public void setUsername(String username) {
this.username = username;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public String execute() throws Exception {
System.out.println( username + " ###" + password);
return SUCCESS;
}
}
运行结果：
- 创建独立model对象，页面通过ognl表达式封装
修改form.jsp,通过ognl表达式，给javabean进行赋值,
action提供 setUser()进行封装 ,通过getUser() 获得对象，并给此对象对应的属性赋值
用户名：<input type="text" name="user.username" /> <br/>
密码：<input type="text" name="user.password" /> <br/>
FormAction.java
package com.my.action;
import com.my.bean.User;
import com.opensymphony.xwork2.ActionSupport;
public class FormAction extends ActionSupport{
private User user;//必须提供getter setter方法
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
@Override
public String execute() throws Exception {
System.out.println(user);
return SUCCESS;
}
}
运行结果：
- 使用ModelDriven接口，对请求数据进行封装
action 实现 ModelDriven
package com.my.action;
import com.my.bean.User;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
public class FormAction extends ActionSupport implements ModelDriven<User>{
private User user = new User(); //必须实例化，如果对象为null，表单中的数据将不能赋值
@Override
public User getModel() {
return user;
}
@Override
public String execute() throws Exception {
System.out.println(user);
return SUCCESS;
}
}
运行结果：
4.获取list数据
修改表单form.jsp:
用户名 ：<input type="text" name="userList[0].username" /> <br/>
密码 ：<input type="text" name="userList[0].password" /> <br/>
用户名 ：<input type="text" name="userList[1].username" /> <br/>
密码 ：<input type="text" name="userList[1].password" /> <br/>
FormAction.java
package com.my.action;
import java.util.ArrayList;
import java.util.List;
import com.my.bean.User;
import com.opensymphony.xwork2.ActionSupport;
public class FormAction extends ActionSupport {
private List<User> userList = new ArrayList<User>();
public List<User> getUserList() {
return userList;
}
public void setUserList(List<User> userList) {
this.userList = userList;
}
@Override
public String execute() throws Exception {
for (User user : userList) {
System.out.println(user);
}
return SUCCESS;
}
}
运行结果：
5.获取map数据
修改表单form.jsp:
用户名 ：<input type="text" name="userMap['u1'].username" /> <br/>
密码 ：<input type="text" name="userMap['u1'].password" /> <br/>
用户名 ：<input type="text" name="userMap['u2'].username" /> <br/>
密码 ：<input type="text" name="userMap['u2'].password" /> <br/>
FormAction.java
package com.my.action;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import com.my.bean.User;
import com.opensymphony.xwork2.ActionSupport;
public class FormAction extends ActionSupport {
private Map<String, User> userMap = new HashMap<String, User>();
public Map<String, User> getUserMap() {
return userMap;
}
public void setUserMap(Map<String, User> userMap) {
this.userMap = userMap;
}
@Override
public String execute() throws Exception {
for (Entry<String, User> entry : userMap.entrySet()) {
System.out.println(entry.getKey() + "##" + entry.getValue());
}
return SUCCESS;
}
}
运行结果：
原创文章，作者：奋斗，如若转载，请注明出处：https://blog.ytso.com/12078.html