Struts的数据封装(三种方式)

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风吹过的烟花 2022-09-07 16:44:14 博主文章分类：Java ©著作权

文章标签 Struts2 struts java xml 文章分类 虚拟化云计算

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demo1.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>Struts2的数据封装</h1>
<h3>方式一：属性驱动-提供set方法</h3>
<form action="${pageContext.request.contextPath }/userAction1.action" method="post">
    用户名：<input type="text" name="username"><br>
    密码：<input type="password" name="password"><br>
    年龄：<input type="text" name="age"><br>
    生日：<input type="text" name="birthday"><br>
    工资：<input type="text" name="salary"><br>
    <input type="submit" value="提交">
</form>

<h3>方式二：属性驱动-在页面提供表达式方式</h3>
<form action="${pageContext.request.contextPath }/userAction2.action" method="post">
    用户名：<input type="text" name="user.username"><br>
    密码：<input type="password" name="user.password"><br>
    年龄：<input type="text" name="user.age"><br>
    生日：<input type="text" name="user.birthday"><br>
    工资：<input type="text" name="user.salary"><br>
    <input type="submit" value="提交">
</form>

<h3>方式三：模型驱动-模型驱动的方式</h3>
<form action="${pageContext.request.contextPath }/userAction3.action" method="post">
    用户名：<input type="text" name="username"><br>
    密码：<input type="password" name="password"><br>
    年龄：<input type="text" name="age"><br>
    生日：<input type="text" name="birthday"><br>
    工资：<input type="text" name="salary"><br>
    <input type="submit" value="提交">
</form>
</body>
</html>

User.java

package com.cherry.struts2.domain;

import java.util.Date;

public class User {
  private String username;
  private String password;
  private Integer age;
  private Date birthday;
  private Double salary;
  
  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 Integer getAge() {
    return age;
  }
  public void setAge(Integer age) {
    this.age = age;
  }
  public Date getBirthday() {
    return birthday;
  }
  public void setBirthday(Date birthday) {
    this.birthday = birthday;
  }
  public Double getSalary() {
    return salary;
  }
  public void setSalary(Double salary) {
    this.salary = salary;
  }
  @Override
  public String toString() {
    return "User [username=" + username + ", password=" + password + ", age=" + age + ", birthday=" + birthday
        + ", salary=" + salary + "]";
  }
  
  
}

UserAction1.java

package com.cherry.struts2.demo2;

import java.util.Date;

import com.cherry.struts2.domain.User;
import com.opensymphony.xwork2.ActionSupport;
/**
 * 数据封装方式一：提供属性的set方法
 * @author zhang
 *
 */
public class UserAction1 extends ActionSupport {
  //提供了对应的属性
  private String username;
  private String password;
  private Integer age;
  private Date birthday;
  private Double salary;
  //提供属性对应的set方法
  

  public void setUsername(String username) {
    this.username = username;
  }

  public void setPassword(String password) {
    this.password = password;
  }

  public void setAge(Integer age) {
    this.age = age;
  }

  public void setBirthday(Date birthday) {
    this.birthday = birthday;
  }

  public void setSalary(Double salary) {
    this.salary = salary;
  }
  
  @Override
  public String execute() throws Exception {
    //接收数据：
    System.out.println(username);
    System.out.println(password);
    System.out.println(age);
    System.out.println(birthday);
    System.out.println(salary);
    
    //封装数据
    User user=new User();
    user.setUsername(username);
    user.setPassword(password);
    user.setAge(age);
    user.setBirthday(birthday);
    user.setSalary(salary);
    return NONE;
  }
}

UserAction2.java

package com.cherry.struts2.demo2;

import com.cherry.struts2.domain.User;
import com.opensymphony.xwork2.ActionSupport;
/**
 * 数据封装的方式二：属性驱动-在页面提供表达式方式
 * @author zhang
 *
 */
public class UserAction2 extends ActionSupport {
  
  //提供一个User对象
  private User user;
  //提供user的set和get方法：一点要提供get方法
  //因为拦截器完成数据封装，需要创建User对象
  public User getUser() {
    return user;
  }


  public void setUser(User user) {
    this.user = user;
  }
  
  @Override
  public String execute() throws Exception {
    System.out.println(user);
    return NONE;
  }
}

UserAction3.java

package com.cherry.struts2.demo2;

import com.cherry.struts2.domain.User;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
/**
 * 数据封装的方式三：模型驱动
 * 缺点：只能封装到一个对象中
 * @author zhang
 *
 */
public class UserAction3 extends ActionSupport implements ModelDriven<User>{
  //模型驱动使用的对象：前提必须手动提供对象的实例
  private User user=new User();//手动实例化User
  @Override
  //模型驱动需要使用的方法：
  public User getModel() {
    return user;
  }
  
  @Override
  public String execute() throws Exception {
    System.out.println(user);
    return NONE;
  }

  
}

struts_demo2.xml

<?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>
  <package name="demo2" extends="struts-default" namespace="/">
  
    <action name="userAction1" class="com.cherry.struts2.demo2.UserAction1">
    </action>
    <action name="userAction2" class="com.cherry.struts2.demo2.UserAction2">
    </action>
    <action name="userAction3" class="com.cherry.struts2.demo2.UserAction3">
    </action>
  </package>
  
</struts>

struts.xml

<?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>
  <!-- 配置Struts2的常量 -->
  <constant name="struts.action.extendsion" value="action"></constant>
  
  <include file="com/cherry/struts2/demo2/struts_demo2.xml"></include>
</struts>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>struts2_day02</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <!-- 配置核心过滤器 -->
  <filter>
      <filter-name>struts</filter-name>
      <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  
  <filter-mapping>
      <filter-name>struts</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>