XML与JSON
这是实战Demo节目，自然不会是讲原理的，事先声明！
本文主要是基于之前的一份Java代码，根据合理数据（下面的链接中有），设计对应的XML格式和JSON格式的存储表示，并使用工具对其合法性加以验证。
JavaCode
先看Java的代码，完整版在这里 → @see 完整版
下面是这里会用到的的部分类：
/**
* Product is created to be used as the super class.
* @author BlankSpace
* @version 2.0
*/
public class Product {
private String code;
private String description;
private double price;
public Product(String code, String description, double price) {
this.code = code;
this.description = description;
this.price = price;
}
public String getCode() {
return this.code;
}
public String getDescription() {
return this.description;
}
public double getPrice() {
return this.price;
}
//Identifying whether objects are equal by code.
@Override
public boolean equals(Object product) {
return (product instanceof Product) && (this.getCode().equals(((Product)product).getCode()));
}
@Override
public String toString() {
return this.getCode() + "," + this.getDescription() + "," + this.getPrice();
}
}
/**
* An orderItem contains one certain type of product and the quantity of user needs.
* The class's objects will be added into an order's item list.
* @author BlankSpace
* @version 2.0
*/
public class OrderItem {
private Product product;
private int quantity;
public OrderItem(Product product, int quantity) {
this.product = product;
this.quantity = quantity;
}
public Product getProduct() {
return this.product;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public int getQuantity() {
return this.quantity;
}
/**
* to calculate the cost of purchasing the product
* @return the result
*/
public double getValue() {
return this.getProduct().getPrice() * this.getQuantity();
}
@Override
public String toString() {
return this.getQuantity() + "," + this.getProduct().getCode() + "," + this.getProduct().getPrice();
}
}
import java.util.ArrayList;
/**
* the class which saves a certain order's all orderItems
* @author BlankSpace
* @version 2.0
*/
public class Order {
//to save all orderItems.
private ArrayList<OrderItem> orderItemList = new ArrayList<>();
/**
* to add the orderItem to the list.
* @param orderItem
*/
public void addOrderItem(OrderItem orderItem) {
this.orderItemList.add(orderItem);
}
/**
* to delete the orderItem which user wants to delete.
* @param orderItem
*/
public void removeOrderItem(OrderItem orderItem) {
this.orderItemList.remove(orderItem);
}
/**
* @return the list which saves all orderItems
*/
public ArrayList<OrderItem> getAllOrderItem(){
return this.orderItemList;
}
/**
* to search the orderItem which user wants to find in the list.
* @param product
* @return the orderItem which user wants to find
*/
public OrderItem getOrderItem(Product product) {
for (OrderItem orderItem : orderItemList) {
if (orderItem.getProduct().equals(product)) {
return orderItem;
}
}
return null;
}
/**
* @return the number of orderItems which are saved in the list.
*/
public int getNumberOfOrderItems() {
return this.orderItemList.size();
}
/**
* to sum all the orderItems' value in the list.
* @return the sum of all the orderItems' value.
*/
public double getValue() {
double value = 0.0;
for (OrderItem orderItem : orderItemList) {
value += orderItem.getValue();
}
return value;
}
}
import java.util.ArrayList;
/**
* the class which can save all orders.
* @author BlankSpace
* @version 2.0
*/
public class Sales {
//to save all orders.
private ArrayList<Order> orders = new ArrayList<>();
/**
* to add the order to the list.
* @param order
*/
public void addOrder(Order order) {
this.orders.add(order);
}
/**
* @return the list which saves all orders
*/
public ArrayList<Order> getAllOrder(){
return this.orders;
}
/**
* @return the number of orders which are saved in the list.
*/
public int getNumberOfOrders() {
return this.orders.size();
}
}
使用XML格式存储
可以将Sales对象的数据使用XML格式来存储。
XML
<?xml version="1.0" encoding="UTF-8" ?>
<SALES>
<ORDER>
<ORDERITEM>
<PRODUCT>
<CODE>A001</CODE>
<DESCRIPTION>Almond Flavored Syrup</DESCRIPTION>
<PRICE>9.0</PRICE>
</PRODUCT>
<QUANTITY>3</QUANTITY>
</ORDERITEM>
<ORDERITEM>
<PRODUCT>
<CODE>A002</CODE>
<DESCRIPTION>Irish Creme Flavored Syrup</DESCRIPTION>
<PRICE>9.0</PRICE>
</PRODUCT>
<QUANTITY>5</QUANTITY>
</ORDERITEM>
</ORDER>
<ORDER>
<ORDERITEM>
<PRODUCT>
<CODE>A001</CODE>
<DESCRIPTION>Almond Flavored Syrup</DESCRIPTION>
<PRICE>9.0</PRICE>
</PRODUCT>
<QUANTITY>1</QUANTITY>
</ORDERITEM>
<ORDERITEM>
<PRODUCT>
<CODE>A004</CODE>
<DESCRIPTION>Caramel Flavored Syrup</DESCRIPTION>
<PRICE>9.0</PRICE>
</PRODUCT>
<QUANTITY>2</QUANTITY>
</ORDERITEM>
<ORDERITEM>
<PRODUCT>
<CODE>A006</CODE>
<DESCRIPTION>Gourmet Coffee Travel Thermo</DESCRIPTION>
<PRICE>18.0</PRICE>
</PRODUCT>
<QUANTITY>3</QUANTITY>
</ORDERITEM>
</ORDER>
<ORDER>
<ORDERITEM>
<PRODUCT>
<CODE>A009</CODE>
<DESCRIPTION>Gourmet Coffee 36 Cup Filters</DESCRIPTION>
<PRICE>45.0</PRICE>
</PRODUCT>
<QUANTITY>100</QUANTITY>
</ORDERITEM>
</ORDER>
</SALES>
浏览器解析XML
XML解析错误
如果我们删去最后一行的<\SALES>，就会解析错误：
使用JSON格式存储
同样的数据，也可以使用JSON格式来存储。
JSON
[
[
{
"product":{
"code":"A001",
"description":"Almond Flavored Syrup",
"price":"9.0"
},
"quantity":"3"
},
{
"product":{
"code":"A002",
"description":"Irish Creme Flavored Syrup",
"price":"9.0"
},
"quantity":"5"
}
],
[
{
"product":{
"code":"A001",
"description":"Almond Flavored Syrup",
"price":"9.0"
},
"quantity":"1"
},
{
"product":{
"code":"A004",
"description":"Caramel Flavored Syrup",
"price":"9.0"
},
"quantity":"2"
},
{
"product":{
"code":"A006",
"description":"Gourmet Coffee Travel Thermo",
"price":"18.0"
},
"quantity":"3"
}
],
[
{
"product":{
"code":"A009",
"description":"Gourmet Coffee 36 Cup Filters",
"price":"45.0"
},
"quantity":"100"
}
]
]
JSLint验证
总结
本文基于之前的一份Java代码，在合理数据集的范围内，编写模拟数据的XML格式代码和JSON格式代码，并分别使用浏览器和JSLint，对其合法性加以验证。
本文内容并不复杂，所以大佬们无须喷，只是希望对需要的人有所帮助。
来源：CSDN
作者：进阶的JFarmer
链接：https://blog.csdn.net/weixin_43896318/article/details/104575081