baseformutil.java

这是一个轻便的j2ee的web应用框架,是一个在多个项目中运用的实际框架,采用struts,hebinate,xml等技术,有丰富的tag,role,navigation,session,dictio

/*
 * Created on 2004-3-24
 *
 */
package com.esimple.framework.util;

import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.beanutils.BeanUtils;

import java.beans.PropertyDescriptor;
import  com.esimple.framework.dao.support.*;
import com.esimple.framework.web.action.BaseForm;

/**
 * 操作BaseForm的常用方法
 * @author steven
 *
 */
public class BaseFormUtil {

	public static DateRange makeDateRange(BaseForm form) throws ConvertException {
		DateRange range = new DateRange( 
			form.getValueAsString( DateRange.BEGIN_DATE,true ),
			form.getValueAsString( DateRange.END_DATE,true   ),
			form.getValueAsString( DateRange.DATE_COLUMN,true)
		);
		return range;
	}

	public static QueryOrder makeOrderClause(BaseForm form, QueryOrder order)
	throws Exception {
		try{			
			order= new QueryOrder(
				form.getValueAsString( QueryOrder.ORDER_COLUMN,true ),
				form.getValueAsString( QueryOrder.ORDER_TYPE,true)
			);
		}catch(Exception e)	{
			System.out.println( "intput para not correct in makeOrderClause" );
		}
		return order;
	}
	
	/**
	 * 将BaseForm中的值设置到指定javaBean的同名属性。
	 * @param targetBean 
	 * @param form
	 * @param propertyName
	 * @param ignoreEmptyString 是否忽略空字符串
	 * @throws ConvertException
	 */
	public static void copyProperty(
		Object targetBean,
		BaseForm form,
		String propertyName,
		boolean ignoreEmptyString) throws ConvertException {
		try{
			PropertyDescriptor origDescriptor = 
				PropertyUtils.getPropertyDescriptor(targetBean,propertyName);
			
			if( origDescriptor == null ) return;
			
			String name = origDescriptor.getName();
				
			if ( PropertyUtils.isWriteable(targetBean, name)) {
				
				Object obj = form.getValue( name );
				if( obj == null ) return;
				
				if( (obj.toString()).length() == 0 && ignoreEmptyString ) return;
				
				//date类型，进行转换
				obj = convertValue(origDescriptor, obj);
				
				BeanUtils.copyProperty(targetBean,name,obj);
			}	

		}catch(Exception e)	{
			e.printStackTrace();
			throw new ConvertException(e.getMessage());
		}
	}
	

	/**
	 * 复制form中的值到指定javaBean的所有同名参数
	 * @param targetBean
	 * @param form
	 * @param ignoreEmptyString 是否忽略空字符串
	 * @throws ConvertException
	 */
	public static void copySimpleProperties(
		Object targetBean,
		BaseForm form,
		boolean ignoreEmptyString) throws ConvertException {
		try{
			PropertyDescriptor origDescriptors[] = 
				PropertyUtils.getPropertyDescriptors(targetBean);
				
			for (int i = 0; i < origDescriptors.length; i++) {
				String name = origDescriptors[i].getName();

//				if( name.equals("class") ) continue;
			
				if ( PropertyUtils.isWriteable(targetBean, name)) {
					Object obj = form.getValue( name );
					if( obj == null ) continue;
					if( (obj.toString()).length() == 0 && ignoreEmptyString ) continue;
					obj =  convertValue(origDescriptors[i],obj);
					BeanUtils.copyProperty(targetBean,name,obj);
				}		
			}//for end	
		}catch(Exception e)	{
			e.printStackTrace();
			throw new ConvertException(e.getMessage());
		}
	}	
	
	//进行类型转换，目前只对Date进行转换
	private static Object convertValue(
		PropertyDescriptor origDescriptor,
		Object obj)
		throws ConvertException {
		if( origDescriptor.getPropertyType() == java.util.Date.class ){
			obj = TimeHelper.getDate(obj.toString());
		}
		if( origDescriptor.getPropertyType() == java.sql.Date.class ){
			obj = TimeHelper.getSqlDate(obj.toString());
		}
		return obj;
	}
}