PullParserUtils.java

package com.todayinfo.utils;

import java.io.InputStream;
import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlPullParser;

import android.util.Log;
import android.util.Xml;

/**
 * Pull解析
 * 
 * @author zhou.ni 2015年3月19日
 */
public class PullParserUtils {

	/**
	 * 解析XML
	 * 
	 * @param is
	 *            xml字节流
	 * @param clazz
	 *            字节码 如：Object.class
	 * @return 返回Object
	 */
	public static Object getXmlObject(InputStream is, Class<?> clazz) {
		XmlPullParser parser = Xml.newPullParser();
		Object object = null;
		List<Object> list = null;
		Object subObject = null;
		String subName = null;

		try {
			parser.setInput(is, "UTF-8"); 					// 事件类型
			int eventType = parser.getEventType();
			
			while (eventType != XmlPullParser.END_DOCUMENT) {
				switch (eventType) {
				case XmlPullParser.START_DOCUMENT: 			// 文档开始事件,可以进行数据初始化处理
					object = clazz.newInstance();
					break;
				case XmlPullParser.START_TAG: 				// 开始元素事件
					String name = parser.getName(); 		// 获得当前节点元素的名称
					Field[] f = null;

					if (subObject == null) {
						f = object.getClass().getDeclaredFields();
						// 判断标签里是否有属性，如果有，则全部解析出来
						int count = parser.getAttributeCount();
						for (int j = 0; j < count; j++)
							setXmlValue(object, parser.getAttributeName(j),
									parser.getAttributeValue(j));
					} else {
						f = subObject.getClass().getDeclaredFields();
					}

					for (int i = 0; i < f.length; i++) {
						if (f[i].getName().equalsIgnoreCase(name)) {
							// 判断是不是List类型
							if (f[i].getType().getName().equals("java.util.List")) {
								f[i].setAccessible(true); // 对类私有变量的暴力反射
								Type type = f[i].getGenericType();
								if (type instanceof ParameterizedType) {
									// 获得泛型参数的实际类型
									Class<?> subClazz = (Class<?>) ((ParameterizedType) type).getActualTypeArguments()[0];
									subObject = subClazz.newInstance();
									subName = f[i].getName();

									// 判断标签里是否有属性，如果有，则全部解析出来
									int count = parser.getAttributeCount();
									for (int j = 0; j < count; j++){
										setXmlValue(subObject,parser.getAttributeName(j),parser.getAttributeValue(j));
									}
									if (list == null) {
										list = new ArrayList<Object>();
										f[i].setAccessible(true);
										f[i].set(object, list);
									}
								}
							} else { 				// 普通属性
								if (subObject != null) {
									setXmlValue(subObject, name,parser.nextText());
								} else {
									setXmlValue(object, name, parser.nextText());
								}
							}
							break;
						}
					}
					break;
				case XmlPullParser.END_TAG:
					if (subObject != null && subName.equalsIgnoreCase(parser.getName())) {
						list.add(subObject);
						subObject = null;
						subName = null;
					}
					break;
				}
				eventType = parser.next();
			}
		} catch (Exception e) {
			Log.e("xml pull error", e.getMessage());
		}
		return object;
	}

	/**
	 * 解析XML
	 * 
	 * @param is
	 *            xml字节流
	 * @param clazz
	 *            字节码 如：Object.class
	 * @param startName
	 *            开始位置
	 * @return 返回List列表
	 */
	public List<Object> getXmlList(InputStream is, Class<?> clazz, String startName) {
		XmlPullParser parser = Xml.newPullParser();
		List<Object> list = null;
		Object object = null;
		
		try {
			parser.setInput(is, "UTF-8");
			int eventType = parser.getEventType();

			while (eventType != XmlPullParser.END_DOCUMENT) {
				switch (eventType) {
				case XmlPullParser.START_DOCUMENT:
					list = new ArrayList<Object>();
					break;
				case XmlPullParser.START_TAG:
					// 获得当前节点元素的名称
					String name = parser.getName();
					if (startName.equals(name)) {
						object = clazz.newInstance();
						// 判断标签里是否有属性，如果有，则全部解析出来
						int count = parser.getAttributeCount();
						for (int i = 0; i < count; i++){
							setXmlValue(object, parser.getAttributeName(i), parser.getAttributeValue(i));
						}
					} else if (object != null) {
						setXmlValue(object, name, parser.nextText());
					}
					break;
				case XmlPullParser.END_TAG:
					if (startName.equals(parser.getName())) {
						list.add(object);
						object = null;
					}
					break;
				}
				eventType = parser.next();
			}
		} catch (Exception e) {
			Log.e("xml pull error", e.toString());
		}
		return list;
	}

	/**
	 * 把xml标签的值，转换成对象里属性的值
	 * 
	 * @param t
	 *            对象
	 * @param name
	 *            xml标签名
	 * @param value
	 *            xml标签名对应的值
	 */
	private static void setXmlValue(Object t, String name, String value) {
		try {
			Field[] f = t.getClass().getDeclaredFields();
			for (int i = 0; i < f.length; i++) {
				if (f[i].getName().equalsIgnoreCase(name)) {
					f[i].setAccessible(true);
					// 获得属性类型
					Class<?> fieldType = f[i].getType();

					if (fieldType == String.class) {
						f[i].set(t, value);
					} else if (fieldType == Integer.TYPE) {
						f[i].set(t, Integer.parseInt(value));
					} else if (fieldType == Float.TYPE) {
						f[i].set(t, Float.parseFloat(value));
					} else if (fieldType == Double.TYPE) {
						f[i].set(t, Double.parseDouble(value));
					} else if (fieldType == Long.TYPE) {
						f[i].set(t, Long.parseLong(value));
					} else if (fieldType == Short.TYPE) {
						f[i].set(t, Short.parseShort(value));
					} else if (fieldType == Boolean.TYPE) {
						f[i].set(t, Boolean.parseBoolean(value));
					} else {
						f[i].set(t, value);
					}
				}
			}
		} catch (Exception e) {
			Log.e("xml set value error", e.toString());
		}
	}
}