JavaBean与Map互相转换

package com.piend.tongzhan.common;

import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

/**
 * Bean对象与Map相互转换
 * 
 * @author 唐超
 * 
 */
@SuppressWarnings("unchecked")
public class JavaBean2Map {

	public static Map<String, Object> convertBean(Object bean) {
		Map<String, Object> map = new HashMap<String, Object>();
		Field fields[] = bean.getClass().getDeclaredFields();
		try {
			Field.setAccessible(fields, true);
			for (int i = 0; i < fields.length; i++) {
				map.put(fields[i].getName(), fields[i].get(bean));
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return map;
	}

	public static Object convertMap(Class<?> type, Map<String, Object> map) {
		Object ob = null;
		try {
			if (map != null && map.size() > 0) {
				ob = type.newInstance();
				Field fields[] = type.getDeclaredFields();
				Field.setAccessible(fields, true);
				for (int i = 0; i < fields.length; i++) {
					if (map.containsKey(fields[i].getName())) {
						fields[i].set(ob, map.get(fields[i].getName()));
					}
				}
			}
		} catch (Exception e) {

			e.printStackTrace();
		}
		return ob;
	}

	public static Map convertBean1(Object bean) throws IntrospectionException,
			IllegalAccessException, InvocationTargetException {
		Class type = bean.getClass();
		Map returnMap = new HashMap();
		BeanInfo beanInfo = Introspector.getBeanInfo(type);
		PropertyDescriptor[] propertyDescriptors = beanInfo
				.getPropertyDescriptors();
		for (int i = 0; i < propertyDescriptors.length; i++) {
			PropertyDescriptor descriptor = propertyDescriptors[i];
			String propertyName = descriptor.getName();
			if (!propertyName.equals("class")) {
				Method readMethod = descriptor.getReadMethod();
				Object result = readMethod.invoke(bean, new Object[0]);
				if (result != null) {
					returnMap.put(propertyName, result);
				} else {
					returnMap.put(propertyName, "");
				}
			}
		}
		return returnMap;
	}

	public static Object convertMap1(Class type, Map map)
			throws IntrospectionException, IllegalAccessException,
			InstantiationException, InvocationTargetException {
		BeanInfo beanInfo = Introspector.getBeanInfo(type);
		Object obj = type.newInstance();
		PropertyDescriptor[] propertyDescriptors = beanInfo
				.getPropertyDescriptors();
		for (int i = 0; i < propertyDescriptors.length; i++) {
			PropertyDescriptor descriptor = propertyDescriptors[i];
			String propertyName = descriptor.getName();
			if (map.containsKey(propertyName)) {
				Object value = map.get(propertyName);
				Object[] args = new Object[1];
				args[0] = value;
				descriptor.getWriteMethod().invoke(obj, args);
			}
		}
		return obj;
	}
}