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【JAVA】：Java对象映射XML文件

2020/6/9 Java

# Java对象映射XML文件

# 一、前期准备

  • 创建Maven工程
  • 导入jar包

# 二、实验

  • 在pom.xml中导入jar 包
<dependency>
     <groupId>xstream</groupId>
    <artifactId>xstream</artifactId>
    <version>1.2.2</version>
</dependency>
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  • 创建实体类
//城市类
public class City {
	   private String name;//城市名
	   private String description;//描述;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getDescription() {
		return description;
	}
	public void setDescription(String description) {
		this.description = description;
	}
	public City(String name, String description) {
		super();
		this.name = name;
		this.description = description;
	}
}

//省份类
public class Provider {
    private String name;//省名
    private List<City>cities=new ArrayList<City>();
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public List<City> getCities() {
		return cities;
	}
	public void setCities(List<City> cities) {
		this.cities = cities;
	}
	public void addcity(City city){
		cities.add(city);
	}    
}
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  • 设置数据
	public static  List<Provider> getprovinderList(){
		Provider p1=new Provider();
		p1.setName("北京");
		p1.addcity(new City("东城区","dongchneng"));
		p1.addcity(new City("昌平区","changping"));
		
		Provider p2=new Provider();
		p2.setName("广东省");
		p2.addcity(new City("汕头市","shangtou"));
		p2.addcity(new City("深圳市","shengzheng"));
		
		List<Provider>provinderList=new ArrayList<Provider>();
		provinderList.add(p1);
		provinderList.add(p2);
		return provinderList;
	}
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  • 测试 测试一
//  默认生成的xml
	public  static void fun1(){
	//获取数据
		List<Provider>provinderList=getprovinderList();
	//获取XStream实例化对象
		XStream x=new XStream();
	//生成XML
		String str=x.toXML(provinderList);
		System.out.println(str);
	}
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在这里插入图片描述 测试二

//	起别名
	public static void fun2(){
		List<Provider>provinderList=getprovinderList();
		XStream x=new XStream();
		//给List类型指定别名为china
		x.alias("china", List.class);
		x.alias("provider", Provider.class);
		x.alias("city", City.class);
		String str=x.toXML(provinderList);
		System.out.println(str);
	}
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在这里插入图片描述

测试三

	public static void fun3(){
		List<Provider>provinderList=getprovinderList();
		XStream x=new XStream();
		
		x.alias("china", List.class);//给List类型指定别名为china
		x.alias("provider", Provider.class);
		x.alias("city", City.class);
		
		x.useAttributeFor(Provider.class,"name");// 把Provider类型的name属性，生成<Provider>元素的属性
		x.addImplicitCollection(Provider.class, "cities");//去除<cities>这样的Collection类型的属性
		
		String str=x.toXML(provinderList);
		System.out.println(str);
	}
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在这里插入图片描述

测试四

//	去除不要的javabean属性
	public static String fun4(){
		List<Provider>provinderList=getprovinderList();
		XStream x=new XStream();
		
		x.alias("china", List.class);
		x.alias("provider", Provider.class);
		x.alias("city", City.class);
		
		x.useAttributeFor(Provider.class,"name");
		x.addImplicitCollection(Provider.class, "cities");
		
		x.omitField(City.class, "description");
		String str=x.toXML(provinderList);
		return str;	
	}
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在这里插入图片描述