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

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巴特西

Struts2数据封装

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