1. 数据封装
1.1 属性驱动：提供属性set方法模式
很少使用
form表单
<hr>
<h2>属性驱动：提供属性set方法模式</h2>
<form action="${pageContext.request.contextPath}/userAction1.action" method="post">
<input type="password" name="id" value="110"><br>
<input type="text" name="uname" value="cat"><br>
<input type="password" name="pwd" value="abc"><br>
<input type="submit"><br>
</form>
配置文件
<package name="demo02" extends="struts-default" namespace="/">
<action name="userAction1" class="com.action.UserAction" method="m1">
<result name="users">/jsp/users.jsp </result>
</action>
</package>
实体类
package com.bean;
public class User {
private Integer id;
private String uname;
private String pwd;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", uname='" + uname + '\'' +
", pwd='" + pwd + '\'' +
'}';
}
}
Action类
package com.action;
import com.bean.User;
import com.opensymphony.xwork2.ActionSupport;
import org.apache.struts2.ServletActionContext;
import javax.servlet.http.HttpServletRequest;
public class UserAction extends ActionSupport {
private Integer id;
private String uname;
private String pwd;
public String m1(){
//接受数据
System.out.println(id);
System.out.println(uname);
System.out.println(pwd);
//封装数据
User user=new User();
user.setId(id);
user.setUname(uname);
user.setPwd(pwd);
ServletActionContext.getRequest().setAttribute("user",user);
return "users";
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", uname='" + uname + '\'' +
", pwd='" + pwd + '\'' +
'}';
}
}
结果页面
<%@ page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" language="java" isELIgnored="false" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
<title>Title</title>
</head>
<body>
名字：${user.uname}<br>
密码：${user.pwd}
</body>
</html>
1.2 属性驱动：页面提供表达方式
使用比较方便，一次可以封装多个对象
form表单
<h2> 属性驱动：页面提供表达方式</h2>
<form action="${pageContext.request.contextPath}/userAction2.action" method="post">
<input type="password" name="user.id" value="110"><br>
<input type="text" name="user.uname" value="cat"><br>
<input type="password" name="user.pwd" value="abc"><br>
<input type="submit"><br>
</form>
配置文件
<package name="demo03" extends="struts-default" namespace="/">
<action name="userAction2" class="com.action.UserAction2" method="m1">
<result name="users">/jsp/users.jsp </result>
</action>
</package>
Action类
package com.action;
import com.bean.User;
import com.opensymphony.xwork2.ActionSupport;
import org.apache.struts2.ServletActionContext;
public class UserAction2 extends ActionSupport {
//提供一个User对象和set,get方法
private User user;
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public String m1(){
System.out.println("UserAction2------");
//接受数据
System.out.println(user);
//封装数据
ServletActionContext.getRequest().setAttribute("user",user);
return "users";
}
}
结果页面
<%@ page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" language="java" isELIgnored="false" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
<title>Title</title>
</head>
<body>
名字：${user.uname}<br>
密码：${user.pwd}
</body>
</html>
1.3 模型驱动：采用模型驱动方式
使用方便，开发中使用最多，但一次只能封装一个对象
form表单
<h2> 模型驱动：采用模型驱动方式</h2>
<form action="${pageContext.request.contextPath}/userAction3.action" method="post">
<input type="password" name="id" value="110"><br>
<input type="text" name="uname" value="cat"><br>
<input type="password" name="pwd" value="abc"><br>
<input type="submit"><br>
</form>
配置文件
<package name="demo04" extends="struts-default" namespace="/">
<action name="userAction3" class="com.action.UserAction3" method="m1">
<result name="users">/jsp/users.jsp </result>
</action>
</package>
Action类
package com.action;
import com.bean.User;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import org.apache.struts2.ServletActionContext;
public class UserAction3 extends ActionSupport implements ModelDriven<User> {
//模型驱动必须手动创建一个模型接受参数
private User user=new User();
public String m1(){
System.out.println("UserAction3------");
//接受数据
System.out.println(user);
//封装数据
ServletActionContext.getRequest().setAttribute("user",user);
return "users";
}
@Override
public User getModel() {
return user;
}
}
结果页面
<%@ page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" language="java" isELIgnored="false" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
<title>Title</title>
</head>
<body>
名字：${user.uname}<br>
密码：${user.pwd}
</body>
</html>