valueobjecthelper.java

管理公司合同

/*
 * Created on Jul 19, 2006 4:11:22 PM
 *
 * By SinoBest
 * Copyright hnisi.com.cn, 2005-2006, All rights reserved.
 */

package cn.com.juneng.system.common.util;

import java.beans.PropertyDescriptor;
import java.lang.reflect.Constructor;
import java.sql.Date;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.beanutils.PropertyUtils;

import cn.com.juneng.system.common.COMMON;

/**
 * @author wanghaifeng
 * @author yehailong
 * 
 */

public class ValueObjectHelper {

	/**
	 * 自动接受HttpServletRequest参数，填充值对象
	 * 
	 * @param target
	 *            目标对象
	 * @param req
	 *            HttpServletRequest
	 */
	public static void fillObjectBean(Object target, HttpServletRequest req) {
		PropertyDescriptor descriptors[] = PropertyUtils
				.getPropertyDescriptors(target.getClass());
		Enumeration paramNames = req.getParameterNames();
		Map namesMap = new HashMap();
		while (paramNames.hasMoreElements()) {
			String name = (String) paramNames.nextElement();
			if (name != null) {
				namesMap.put(name.toLowerCase(), name);
			}
		}
		for (int i = 0; i < descriptors.length; i++) {
			String property = descriptors[i].getName();
			if (!namesMap.containsKey(property.toLowerCase()))
				continue;
			Class propClass = descriptors[i].getPropertyType();
			try {
				String paramName = (String) namesMap
						.get(property.toLowerCase());
				String valueStr = req.getParameter(paramName);
				if (valueStr == null || valueStr.trim().length() == 0) {
					continue;
				}
				Object value = null;
				if (!propClass.isPrimitive()) {
					// 不是基本类型
					if (propClass == Timestamp.class) {
						value = formatToTimestamp(valueStr);
					} else if (propClass == java.sql.Date.class) {
						value = formatToSQLDATE(valueStr);
					} else {
						// 通过构造函数转换string
						Constructor constructor = propClass
								.getConstructor(new Class[] { Class
										.forName("java.lang.String") });
						value = constructor
								.newInstance(new String[] { valueStr });
					}
				} else {
					// 基本类型
					if (Integer.TYPE == propClass) {
						value = new Integer(valueStr);
					} else if (Double.TYPE == propClass) {
						value = new Double(valueStr);
					} else if (Boolean.TYPE == propClass) {
						value = new Boolean(valueStr);
					} else if (Long.TYPE == propClass) {
						value = new Long(valueStr);
					} else if (Float.TYPE == propClass) {
						value = new Float(valueStr);
					} else if (Byte.TYPE == propClass) {
						value = new Byte(valueStr);
					} else if (Short.TYPE == propClass) {
						value = new Short(valueStr);
					}
				}
			    PropertyUtils.setProperty(target, property, value);
				//PropertyUtils.setNestedProperty(target, property, value);
			} catch (Exception e) {
				e.printStackTrace();
				// ignore
			}
		}
	}

	public static Timestamp formatToTimestamp(String sTimestamp) {
		if (sTimestamp == null || sTimestamp.equals(""))
			return null;
		String sTemp = sTimestamp.trim();
		if (sTemp.length() < 12)
			sTemp = sTemp + " 00:00:00";
		Timestamp time = null;
		try {
			time = new Timestamp(new SimpleDateFormat(COMMON.TIME_FORMAT)
					.parse(sTemp).getTime());
		} catch (Exception e) {
			e.printStackTrace();
		}
		return time;
	}

	public static Date formatToSQLDATE(String sDate) {
		if (sDate == null || sDate.equals("")) {
			return null;
		} else {
			Date date = new Date(formatToTimestamp(sDate).getTime());
			return date;
		}
	}
}