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DynamicReports is an open source Java reporting library based on JasperReports. It allows to create dynamic report designs and it doesn't need a visual report designer.
You can very quickly create reports and produce documents that can be displayed, printed or exported into many popular formats such as PDF, Excel, Word and others.
/**
* DynamicReports - Free Java reporting library for creating reports dynamically
*
* Copyright (C) 2010 - 2016 Ricardo Mariaca
* http://www.dynamicreports.org
*
* This file is part of DynamicReports.
*
* DynamicReports is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DynamicReports is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DynamicReports. If not, see .
*/
package net.sf.dynamicreports.design.transformation.expressions;
import java.text.MessageFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import net.sf.dynamicreports.report.builder.datatype.DataTypes;
import net.sf.dynamicreports.report.builder.expression.AbstractComplexExpression;
import net.sf.dynamicreports.report.constant.Constants;
import net.sf.dynamicreports.report.definition.ReportParameters;
import net.sf.dynamicreports.report.definition.expression.DRIExpression;
/**
* @author Ricardo Mariaca ([email protected])
*/
public class CurrentDateExpression extends AbstractComplexExpression {
private static final long serialVersionUID = Constants.SERIAL_VERSION_UID;
private String datePattern;
public CurrentDateExpression(DRIExpression currentDateExpression, String datePattern) {
this.datePattern = datePattern;
addExpression(currentDateExpression);
}
@Override
public String evaluate(List values, ReportParameters reportParameters) {
String pattern = (String) values.get(0);
Locale locale = reportParameters.getLocale();
MessageFormat format = new MessageFormat(pattern, locale);
String date;
if (datePattern == null) {
date = DataTypes.dateType().valueToString(new Date(), locale);
}
else {
date = new SimpleDateFormat(datePattern, locale).format(new Date());
}
String result = format.format(new Object[]{date});
return result;
}
}