android 反射解析xml文件成为java对象

ReflectResolveXML.java

package com.player.handle;

import java.lang.reflect.Field;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Stack;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class ReflectResolveXML extends DefaultHandler {
	public static final String T_COLLECTION="collection";
	public static final String T_OBJECT="object";
	public static final String T_LANG="lang";
	private static final String T_DATE = "date";
	private static final String D_PATTERN = "yyyy-MM-dd HH:mm:ss";
	Stack<Object> stack=new Stack<Object>();
	private Object root=null;
	public Object getRoot() {
		return root;
	}

	@Override
	public void endElement(String uri, String localName, String qName)
			throws SAXException {
	//	System.out.println("endElement:"+uri+" localName:"+localName+ " qName:"+qName);
		if (qName.equals(T_OBJECT)||qName.equals(T_COLLECTION)) {
			//如果集合类或者object类 属性注入完成则需要弹出堆栈
			stack.pop();
		}
	}
	@Override
	public void startElement(String uri, String localName, String qName,
			Attributes attributes) throws SAXException {
		// TODO Auto-generated method stu
		StringBuffer stb=new StringBuffer();
		for (int i = 0; i < attributes.getLength(); i++) {
			stb.append(attributes.getValue(i)+"---")	;
		}
		System.out.println("startElement:"+uri+" localName:"+localName+ " qName:"+qName+" Attr: "+stb.toString());
		//如果根元素为null  则新建一个 因为第一个读取的必定是根元素
		String type=attributes.getValue("type");
		if (root==null) {
			root=instanceObjectByType(type); 
			stack.push(root);
			return;
		}
		String value=attributes.getValue("value");
		String name=attributes.getValue("name");
		Object pObj=stack.peek();
			//根元素不为空 则根据 qname判断 
			if (qName.equals(T_COLLECTION)||qName.equals(T_OBJECT)) {
				//如果是list则new 一个list 或者 object 则new出来
				Object obj=instanceObjectByType(type);
				stack.push(obj);
				injectToParent(pObj, obj,name);
			}else if (qName.equals(T_LANG)) {
				//如果是lang 则需要转化value值
				Object valueObj=typeConvert(type, value);
				injectToParent(pObj,valueObj,name);
			}else if (qName.equals(T_DATE)) {
				//如果是date
				String pattern=attributes.getValue("pattern");
				if (pattern==null) {
					pattern=D_PATTERN;
				}
				Object valueObj=typeConvertDate(value,pattern);
				injectToParent(pObj,valueObj,name);
			}
	}


	
	//转化date类型
	private Date typeConvertDate( String value, String pattern) {
		SimpleDateFormat sdf=new SimpleDateFormat(pattern);
		Date date;
		try {
			date = sdf.parse(value);
			return date;
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}

	//向上一级元素中注入属性 或者向集合类中add子元素
	private void injectToParent(Object pObj, Object fieldValue ,String fieldName) {
		if (pObj instanceof Collection) {
			//如果上一级是集合类 则需要添加进去
			((Collection) pObj).add(fieldValue);
			return ;
		}
		//如果上一级是object 则需要反射字段赋值
		Field[] fields = pObj.getClass().getDeclaredFields();
		for (Field field : fields) {
			if (field.getName().equals(fieldName)) {
				try {
					field.setAccessible(true);
					field.set(pObj, fieldValue);
				} catch (IllegalArgumentException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (IllegalAccessException e) {
				// TODO Auto-generated catch block
					e.printStackTrace();
				}
				break;
			}
		}
	}

	//反射实例化对象
	private Object instanceObjectByType(String qName) {
		try {
			Class localClass= Class.forName(qName);
			Object obj=localClass.getConstructor().newInstance();
			return obj; 
			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			throw new RuntimeException(e);
		}
	
	}
	
	// 此方法用于将一个字符串转换为相应的数据类型
	public Object typeConvert(String className, String value) {
		if (className.equals("java.lang.String")) {
			return value;
		} else if (className.equals("java.lang.Integer")) {
			return Integer.valueOf(value);
		} else if (className.equals("java.lang.Long")) {
			return Long.valueOf(value);
		} else if (className.equals("java.lang.Boolean")) {
			return Boolean.valueOf(value);
		} else if (className.equals("java.lang.Float")) {
			return Float.valueOf(value);
		} else if (className.equals("java.lang.Double")) {
			return Double.valueOf(value);
		} else
			return null;
	} 
	
	
}

 reflect.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<collecton type="java.util.ArrayList">
	<object type="com.player.module.Resource">
		<lang type="java.lang.String" name="id" value="0001"></lang>
		<object type="com.player.module.Mp3" name="mp3">
				<lang type="java.lang.String" name="mp3Name" value="天地初开的时候.mp3"></lang>
				<lang type="java.lang.Integer" name="mp3Size" value="12333"></lang>
		</object>
		<object type="com.player.module.Lrc" name="lrc">
				<lang type="java.lang.String" name="lrcName" value="天地初开的时候.lrc"></lang>
				<lang type="java.lang.Integer" name="lrcSize" value="4312"></lang>
		</object>
		<date type="java.util.Date" name="date" value="2001-12-12 12:12:12"></date>
	</object>
	
	<object type="com.player.module.Resource">
		<lang type="java.lang.String" name="id" value="0002"></lang>
		<object type="com.player.module.Mp3" name="mp3">
				<lang type="java.lang.String" name="mp3Name" value="那一曲盛放的玫瑰.mp3"></lang>
				<lang type="java.lang.Integer" name="mp3Size" value="12333"></lang>
		</object>
		<object type="com.player.module.Lrc" name="lrc">
				<lang type="java.lang.String" name="lrcName" value="那一曲盛放的玫瑰.lrc"></lang>
				<lang type="java.lang.Integer" name="lrcSize" value="4312"></lang>
		</object>
		<date type="java.util.Date" name="date" value="2001-12-13 12:12:12"></date>
	</object>
</collecton>

 HandleTest.java

package com.player.handle;

import java.io.File;
import java.io.IOException;
import java.util.List;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.junit.Test;
import org.xml.sax.SAXException;

import com.player.module.Resource;


public class HandleTest  {
	
	@Test
	public void testresolveXmlTest() throws ParserConfigurationException, SAXException, IOException{
	//	HttpDownloader downloader=new HttpDownloader();
	//	String xml= downloader.download(Mp3ListActiviy.URL);
		File file=new java.io.File("D:\\Soft\\Program\\Apache-Tomcat-6.0.20\\webapps\\android_mp3\\reflect.xml");
		SAXParser saxParser=SAXParserFactory.newInstance().newSAXParser();
		ReflectResolveXML reflectResolveXML=new ReflectResolveXML();
		saxParser.parse(file, reflectResolveXML);
		List<Resource> resources=(List<Resource>) reflectResolveXML.getRoot();
		System.out.println("---------------------");
		for (Resource resource : resources) {
			System.out.println(resource.toString());
		}
		//mp3xmlHandle.getMp3List();
	}
	
	
}

 三个javabean

public class Lrc {
	private String lrcName;
	private Integer lrcSize;
}


public class Mp3 {
	private String mp3Name;
	private int mp3Size;
}

public class Resource {
	private String id;
	private Mp3 mp3;
	private Lrc lrc;
	private Date date;
}