?? valhelper.java
字號:
package com.air.util;
import java.util.Date;
import java.util.Map;
import com.air.constants.AppConstants;
public final class ValHelper
{
/**
* private constructor of ValHelper, prevent instantiation
*/
private ValHelper()
{
}
private static class ValHelperHolder
{
static final ValHelper valHelper = new ValHelper();
}
/**
* @return an instance of ValHelper
*/
public static ValHelper getInstance()
{
return ValHelperHolder.valHelper;
}
public boolean isNotNullAndEmpty(String valStr)
{
boolean flag = false;
if((valStr != null) && (!((AppConstants.EMPTY_STR).equalsIgnoreCase(valStr.trim()))))
{
flag = true;
}
return flag;
}
public boolean isNullOrEmpty(String valStr)
{
boolean flag = false;
if((valStr == null) || ((AppConstants.EMPTY_STR).equalsIgnoreCase(valStr.trim())))
{
flag = true;
}
return flag;
}
public String getValue(Map<String,String> valMap, String key)
{
String retVal = AppConstants.EMPTY_STR;
if( isNotNullAndEmpty(key))
{
String result = valMap.get(key);
if( isNotNullAndEmpty(result))
{
retVal = result;
}
}
return retVal.trim();
}
public int getIntValue( Map<String,String> valMap, String key )
{
int retint = 0;
String intstr = getValue(valMap, key);
if( isNotNullAndEmpty(intstr))
{
try
{
retint = Integer.parseInt(intstr);
}
catch( Exception ex )
{
}
}
return retint;
}
public double getDoubleValue( Map<String,String> valMap, String key )
{
double retdouble = 0.0;
String intstr = getValue(valMap, key);
if( isNotNullAndEmpty(intstr))
{
try
{
retdouble = Double.parseDouble(intstr);
}
catch( Exception ex )
{
}
}
return retdouble;
}
public Date getDateValue( Map<String,String> valMap, String key )
{
Date date = null;
String datestr = getValue(valMap, key);
if( isNotNullAndEmpty(datestr))
{
date = VacDateUtil.getInstance().convertFromString(datestr);
}
return date;
}
}
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