?? dateconverter.java
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package com.lily.dap.util;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.sql.Timestamp;
import org.apache.commons.beanutils.ConversionException;
import org.apache.commons.beanutils.Converter;
import org.apache.commons.lang.StringUtils;
/**
* This class is converts a java.util.Date to a String
* and a String to a java.util.Date.
*
* <p>
* <a href="DateConverter.java.html"><i>View Source</i></a>
* </p>
*
* @author <a href="mailto:matt@raibledesigns.com">Matt Raible</a>
*/
public class DateConverter implements Converter {
public Object convert(Class type, Object value) {
if (value == null) {
return null;
} else if (type == Timestamp.class) {
return convertToDate(type, value, DateUtil.getDateTimePattern());
} else if (type == Date.class) {
return convertToDate(type, value, DateUtil.getDatePattern());
} else if (type == String.class) {
return convertToString(type, value);
} else if (type == Object.class) {
return value;
}
throw new ConversionException("Could not convert " +
value.getClass().getName() + " to " +
type.getName());
}
protected Object convertToDate(Class type, Object value, String pattern) {
DateFormat df = new SimpleDateFormat(pattern);
if (value instanceof String) {
try {
if (StringUtils.isEmpty(value.toString())) {
return null;
}
Date date = df.parse((String) value);
if (type.equals(Timestamp.class)) {
return new Timestamp(date.getTime());
}
return date;
} catch (Exception pe) {
pe.printStackTrace();
throw new ConversionException("Error converting String to Date");
}
}
throw new ConversionException("Could not convert " +
value.getClass().getName() + " to " +
type.getName());
}
protected Object convertToString(Class type, Object value) {
if (value instanceof Date) {
DateFormat df = new SimpleDateFormat(DateUtil.getDatePattern());
if (value instanceof Timestamp) {
df = new SimpleDateFormat(DateUtil.getDateTimePattern());
}
try {
return df.format(value);
} catch (Exception e) {
e.printStackTrace();
throw new ConversionException("Error converting Date to String");
}
} else {
return value.toString();
}
}
}
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