一、示例简介
本代码示例主要通过将新闻对象的初始化映射为配置文件news_cfg.xml的属性配置，通过dom4j(dom4j-1.6.1.jar)完成xml的解读，具体代码如下
 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | package xwood.mapping;import java.io.InputStream;import java.lang.reflect.Field;import java.util.ArrayList;import java.util.List;import org.dom4j.Document;import org.dom4j.Element;import org.dom4j.io.SAXReader;public class XmlCfgObjMappingTest { @SuppressWarnings("unused") private static Document loadXmlDoc() throws Exception{ InputStream in = XmlCfgObjMappingTest.class.getResourceAsStream("/xwood/mapping/news_cfg.xml"); SAXReader reader = new SAXReader(); return reader.read(in); } @SuppressWarnings("unchecked") private static News setNewsObj(Element newNode) throws Exception{ Class<News> new_cls = News.class; News new_obj = new_cls.newInstance(); //获取new元素属性节点 List<Element> n_new_properties = newNode.elements(); for(Element p : n_new_properties){ String p_name = p.getName(); //获取news所有属性 Field field = new_cls.getDeclaredField(p_name); //开放private protected访问权限 field.setAccessible(true); Class<?> type = field.getType(); Object p_value = p.getTextTrim(); if(type==int.class){ p_value = Integer.parseInt(p_value.toString()); }else if(type==boolean.class){ p_value = Boolean.parseBoolean(p_value.toString()); } field.set(new_obj, p_value);// 动态设置值 } return new_obj; } @SuppressWarnings("unchecked") public static List<News> getNews() throws Exception{ //加载配置xml对象mappin文件 Document doc=loadXmlDoc(); //获取根节点,并找到new元素节点 List<Element> n_news = doc.getRootElement().elements("new"); List<News> newlist=new ArrayList<News>(); for(Element n_new : n_news){ newlist.add(setNewsObj(n_new)); } return newlist; } public static void main(String[] args) throws Exception { List<News> news=getNews(); for(News n:news){ System.out.println(n.toString()); } }} |
News类
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | package xwood.mapping;public class News { private String title; private String location; private String kwords; public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getLocation() { return location; } public void setLocation(String location) { this.location = location; } public String getKwords() { return kwords; } public void setKwords(String kwords) { this.kwords = kwords; } @Override public String toString() { return super.toString()+"@title:"+title+"@location:"+location+"@kwords:"+kwords; }} |
news_cfg.xml配置文件
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | <?xml version="1.0" encoding="UTF-8"?><news> <new> <!-- 标题 --> <title>Java中遍历访问类几种常用方式的实现工具类ClassUtil</title> <!-- 网址 --> <location>http://www.xwood.net/_site_domain_/_root/5870/5874/t_c262686.html</location> <!-- 关键词--> <kwords>java、知识库</kwords> </new> <new> <title>通过定义JS窗口对象获取url地址location.search部分的参数值</title> <location>http://www.xwood.net/_site_domain_/_root/5870/5874/t_c262647.html</location> <kwords>javascript、getParameter</kwords> </new></news> |
二、控制台结果
1 2 | xwood.mapping.News@3a56f631@title:Java中遍历访问类几种常用方式的实现工具类ClassUtil@location:http://www.xwood.net/_site_domain_/_root/5870/5874/t_c262686.html@kwords:java、知识库xwood.mapping.News@233d28e3@title:通过定义JS窗口对象获取url地址location.search部分的参数值@location:http://www.xwood.net/_site_domain_/_root/5870/5874/t_c262647.html@kwords:javascript、getParameter |
