Struts2数据封装

首先是简单数据类型的封装

jsp页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h1>Sturts2的数据封装</h1>
<h3>方式一:属性驱动-提供set方法的方式</h3>
<s:fielderror/>
<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="date" 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-在页面中提供表达式的方式</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="date" 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="date" name="birthday"><br/>
    工资:<input type="text" name="salary"><br/>
    <input type="submit" value="提交">
</form>
</body>
</html>

struts.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
        "http://struts.apache.org/dtds/struts-2.5.dtd">

<struts>
    <package name="demo2" extends="struts-default" namespace="/">
        <global-results>
            <result name="input">/</result>
        </global-results>
        <action name="userAction1" class="com.jinke.domain.UserAction1"/>
        <action name="userAction2" class="com.jinke.domain.UserAction2"/>
        <action name="userAction3" class="com.jinke.domain.UserAction3"/>
    </package>
</struts>

实体类

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 +
                '}';
    }
}

简单数据封装的三种方式

import com.opensymphony.xwork2.ActionSupport;

import java.util.Date;

/**
 * 数据封装的方式一:提供属性的set方法
 */
public class UserAction1 extends ActionSupport {

    private String username;
    private String password;
    private Integer age;
    private Date birthday;
    private Double 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;
    }

    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;
    }
}
import com.opensymphony.xwork2.ActionSupport;

/**
 * 数据封装的方式二:属性驱动-在页面中提供表达式的方式
 */
public class UserAction2 extends ActionSupport {
    //提供一个User对象
    private User user;

    public void setUser(User user) {
        this.user = user;
    }

    public User getUser() {
        return user;
    }

    @Override
    public String execute() throws Exception {
        System.out.println(user.toString());
        return NONE;
    }
}
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

/**
 * 数据封装的方式三:模型驱动的方式
 */
public class UserAction3 extends ActionSupport implements ModelDriven<User> {
    private User user = new User();//手动实例化User

    @Override
    public String execute() throws Exception {
        System.out.println(user.toString());
        return NONE;
    }

    //模型驱动需要使用的方法
    @Override
    public User getModel() {
        return user;
    }
}

结果

下面是复杂数据类型的封装

jsp页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h1>Struts2复杂类型的数据封装</h1>
<h3>封装到List集合中:批量插入商品</h3>
<form action="${pageContext.request.contextPath}/productAction1.action" method="post">
    商品名称:<input type="text" name="products[0].name"><br/>
    商品价格:<input type="text" name="products[0].price"><br/>
    商品名称:<input type="text" name="products[1].name"><br/>
    商品价格:<input type="text" name="products[1].price"><br/>
    商品名称:<input type="text" name="products[2].name"><br/>
    商品价格:<input type="text" name="products[2].price"><br/>
    <input type="submit" value="提交">
</form>

<h3>封装到Map集合中:批量插入商品</h3>
<form action="${pageContext.request.contextPath}/productAction2.action" method="post">
    商品名称:<input type="text" name="map['one'].name"><br/>
    商品价格:<input type="text" name="map['one'].price"><br/>
    商品名称:<input type="text" name="map['two'].name"><br/>
    商品价格:<input type="text" name="map['two'].price"><br/>
    商品名称:<input type="text" name="map['three'].name"><br/>
    商品价格:<input type="text" name="map['three'].price"><br/>
    <input type="submit" value="提交">
</form>
</body>
</html>

struts.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
        "http://struts.apache.org/dtds/struts-2.5.dtd">

<struts>
    <package name="demo3" extends="struts-default" namespace="/">
        <action name="productAction1" class="com.jinke.product.ProductAction1"/>
        <action name="productAction2" class="com.jinke.product.ProductAction2"/>
    </package>
</struts>

实体类

public class Product {
    private String name;
    private Double price;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Double getPrice() {
        return price;
    }

    public void setPrice(Double price) {
        this.price = price;
    }

    @Override
    public String toString() {
        return "Product{" +
                "name='" + name + '\'' +
                ", price=" + price +
                '}';
    }
}

数据保存到List中

import com.opensymphony.xwork2.ActionSupport;

import java.util.List;

/**
 * 负责类型数据封装到List中
 */
public class ProductAction1 extends ActionSupport {
    private List<Product> products;

    public void setProducts(List<Product> products) {
        this.products = products;
    }

    public List<Product> getProducts() {
        return products;
    }

    @Override
    public String execute() throws Exception {
        for (Product product : products) {
            System.out.println(product);
        }
        return NONE;
    }
}

数据保存到Map中

import com.opensymphony.xwork2.ActionSupport;

import java.util.Map;

/**
 * 负责类型数据封装到Map中
 */
public class ProductAction2 extends ActionSupport {
    private Map<String, Product> map;

    public Map<String, Product> getMap() {
        return map;
    }

    public void setMap(Map<String, Product> map) {
        this.map = map;
    }

    @Override
    public String execute() throws Exception {
        for (String key : map.keySet()) {
            Product product = map.get(key);
            System.out.println(product.toString());
        }
        return NONE;
    }
}

结果

本文分享自微信公众号 - 安卓圈(gh_df75572d44e4)

原文出处及转载信息见文内详细说明,如有侵权,请联系 yunjia_community@tencent.com 删除。

原始发表时间:2019-06-18

本文参与腾讯云自媒体分享计划,欢迎正在阅读的你也加入,一起分享。

发表于

我来说两句

0 条评论
登录 后参与评论

扫码关注云+社区

领取腾讯云代金券