Spring MVC - View Examples

Code Snippets Spring MVC 

    @Bean("simpleView")
public View myCustomView() {
return new MyCustomView();
}
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import org.springframework.web.servlet.View;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
import java.util.Map;

public class MyCustomView implements View {

@Override
public String getContentType() {
return "text/html";
}

@Override
public void render(Map<String, ?> model, HttpServletRequest request,
HttpServletResponse response) throws Exception {
response.setContentType(getContentType());
PrintWriter writer = response.getWriter();
writer.println("This is my custom dummy view.<br/>");
writer.println("<h3>Model attributes</h3>");
for (Map.Entry<String, ?> entry : model.entrySet()) {
writer.printf("%s = %s<br/>", entry.getKey(), entry.getValue());
}
}
}
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import com.itextpdf.io.font.FontConstants;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.view.AbstractView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.time.format.DateTimeFormatter;
import java.time.format.FormatStyle;
import java.util.Map;

@Component("reportView")
public class ReportPdfView extends AbstractView {

@Override
protected void renderMergedOutputModel(Map<String, Object> model,
HttpServletRequest request,
HttpServletResponse response) throws Exception {
response.setHeader("Content-Disposition", "attachment; filename=myReport.pdf");
Report report = (Report) model.get("report");

//IText API
PdfWriter pdfWriter = new PdfWriter(response.getOutputStream());
PdfDocument pdf = new PdfDocument(pdfWriter);
Document pdfDocument = new Document(pdf);

//title
Paragraph title = new Paragraph(report.getName());
title.setFont(PdfFontFactory.createFont(FontConstants.HELVETICA));
title.setFontSize(18f);
title.setItalic();
pdfDocument.add(title);

//date
Paragraph date = new Paragraph(report.getDate().format(
DateTimeFormatter.ofLocalizedDate(FormatStyle.FULL)));
date.setFontSize(16f);
pdfDocument.add(date);

//content
Paragraph content = new Paragraph(report.getContent());
pdfDocument.add(content);

pdfDocument.close();
}
}
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import net.sf.jasperreports.engine.*;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import net.sf.jasperreports.engine.export.HtmlExporter;
import net.sf.jasperreports.export.SimpleExporterInput;
import net.sf.jasperreports.export.SimpleHtmlExporterOutput;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.view.AbstractView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.util.List;
import java.util.Map;

@Component("forexView")
public class CurrencyRateHtmlView extends AbstractView {
private JasperReport currencyRatesReport;

@Override
protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request,
HttpServletResponse response) throws Exception {
response.setContentType("text/html");
List<CurrencyRate> rates = (List<CurrencyRate>) model.get("todayCurrencyRates");
//data source
JRDataSource dataSource = getDataSource(rates);
//compile jrxml template and get report
JasperReport report = getReport();
//fill the report with data source objects
JasperPrint jasperPrint = JasperFillManager.fillReport(report, null, dataSource);
//export to html
HtmlExporter exporter = new HtmlExporter(DefaultJasperReportsContext.getInstance());
exporter.setExporterInput(new SimpleExporterInput(jasperPrint));
exporter.setExporterOutput(new SimpleHtmlExporterOutput(response.getWriter()));
exporter.exportReport();
}

private JRDataSource getDataSource(List<CurrencyRate> rates) {
JRBeanCollectionDataSource dataSource = new JRBeanCollectionDataSource(rates);
return dataSource;
}

public JasperReport getReport() throws JRException {
if (currencyRatesReport == null) {//compile only once lazily
InputStream stream = getClass().getResourceAsStream("/rates.jrxml");
currencyRatesReport = JasperCompileManager.compileReport(stream);
}
return currencyRatesReport;
}
}
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    @Bean("currencyRateView")
public View jsonView() {
MappingJackson2JsonView view = new MappingJackson2JsonView();
return view;
}
Original Post




See Also