jasperreport中可以使用List作为数据源，使用格式如下.
List list=this.customerDao.getAllCustomer(); //得到所有客户
JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(list);
JasperPrint jasperPrint = JasperFillManager.fillReport(
reportFilePath, parameters, ds);
得填充数据后，即可输出显示到PDF,Excel,Html
到PDF:
public byte[] generatePDF(String begCustNo, String endCustNo,
String reportTitle, String reportFilePath) throws DemoException {
// TODO Auto-generated method stub
//begCustNo,endCustNo分别为查询传入的开始编号，结束编号.
jdbcCustomerDao = new JdbcCustomerDao();
Map parameters = new HashMap();
parameters.put("ReportTitle", reportTitle);//报表标题
List list = jdbcCustomerDao.getAllCustomer(begCustNo, endCustNo);
try {
JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(list);
JasperPrint jasperPrint = JasperFillManager.fillReport(
reportFilePath, parameters, ds); return JasperExportManager.exportReportToPdf(jasperPrint);
} catch (JRException e) {
throw new DemoException("Report Export Failed.");
}
}
到Html:
public byte[] generateHtml(String begCustNo, String endCustNo,
String reportTitle, String reportFilePath) throws DemoException {
jdbcCustomerDao = new JdbcCustomerDao();
Map parameters = new HashMap();
parameters.put("ReportTitle", reportTitle);
List list = jdbcCustomerDao.getAllCustomer(begCustNo, endCustNo);
System.out.println("list size is :" + list.size());
JRHtmlExporter exporter = new JRHtmlExporter();
ByteArrayOutputStream oStream = new ByteArrayOutputStream();
try {
JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(list);
JasperPrint jasperPrint = JasperFillManager.fillReport(
reportFilePath, parameters, ds);
exporter.setParameter(
JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN,
Boolean.FALSE);
exporter
.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter
.setParameter(JRExporterParameter.CHARACTER_ENCODING, "GBK");
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, oStream);
exporter.exportReport();
byte[] bytes = oStream.toByteArray();
return bytes;
} catch (JRException e) {
throw new DemoException("Report Export Failed.");
}
}
到Excel:
public byte[] generateExcel(String begCustNo, String endCustNo,
String reportTitle, String reportFilePath) throws DemoException {
jdbcCustomerDao = new JdbcCustomerDao();
Map parameters = new HashMap();
parameters.put("ReportTitle", reportTitle);
List list = jdbcCustomerDao.getAllCustomer(begCustNo, endCustNo);
System.out.println("list size is :" + list.size());
JRXlsExporter exporter = new JRXlsExporter(); // Excel
ByteArrayOutputStream oStream = new ByteArrayOutputStream();
try {
JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(list);
JasperPrint jasperPrint = JasperFillManager.fillReport(
reportFilePath, parameters, ds);
exporter
.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, oStream);
exporter.setParameter(
JRXlsExporterParameter.IS_REMOVE_EMPTY_SPACE_BETWEEN_ROWS,
Boolean.TRUE);
exporter.setParameter(JRXlsExporterParameter.IS_ONE_PAGE_PER_SHEET,
Boolean.FALSE);
exporter.setParameter(
JRXlsExporterParameter.IS_WHITE_PAGE_BACKGROUND,
Boolean.FALSE);
exporter.exportReport();
byte[] bytes = oStream.toByteArray();
return bytes;
} catch (JRException e) {
throw new DemoException("Report Export Failed.");
}
}
jsp调用方法：
<%
String filePath=getServletContext().getRealPath("/")+"report.jasper";
CustomerServiceImpl custs=new CustomerServiceImpl();
byte[] bytes=null;
String begNo=request.getParameter("beginCustNo");
String endNo=request.getParameter("endCustNo");
String type=request.getParameter("type");
if(type.equals("Pdf")){
bytes= custs.generatePDF(begNo,endNo,"客户资料明细表",filePath);
}else if(type.equals("Excel")){
bytes=custs.generateExcel(begNo,endNo,"客户资料明细表",filePath);
}else
bytes=custs.generateHtml(begNo,endNo,"客户资料明细表",filePath);
if(bytes!=null){
if(type.equals("Pdf")){
response.setContentType("application/pdf");
}else if(type.equals("Excel")){
response.setContentType("application/vnd.ms-excel");
}else
response.setContentType("text/html");
response.setContentLength(bytes.length);
ServletOutputStream ouputStream = response.getOutputStream();
ouputStream.write(bytes,0,bytes.length);
ouputStream.flush();
ouputStream.close();
}else
{
out.println("error");
}
%>
======================================
servlet 输出
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Connection conn=null;
try{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
conn=DriverManager.getConnection("jdbc:microsoft:sqlserver://localhost:1481;DatabaseName=pdw","sa","123456");
ServletContext servletContext=this.getServletContext();
Map parameters=new HashMap();
parameters.put("vname","裴德万");
File reportfile=new File(servletContext.getRealPath("/classes.jasper"));
System.out.println(reportfile.getPath());
byte[] bytes=JasperRunManager.runReportToPdf(reportfile.getPath(),parameters,conn);
response.setContentType("application/pdf");
response.setContentLength(bytes.length);
ServletOutputStream outputStream=response.getOutputStream();
outputStream.write(bytes,0,bytes.length);
outputStream.flush();
outputStream.close();
}catch(Exception e){
e.printStackTrace();
}
}
posted on 2007-11-01 18:19
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