jasperreport可以用Collection做为数据源

<%@ page contentType="text/html;charset=GBK" %>
<%@ page import="dori.jasper.engine.*" %>
<%@ page import="java.util.*" %>
<%@ page import="java.io.*" %>
<%@ page import="java.sql.*" %>
<%@ page import="com.zx.report.util.CarUse"%>
<%@ page import="dori.jasper.engine.data.*" %>
<%
Connection conn = null;
Statement st = null;
ResultSet rs = null;
byte[] bytes = null;
List carUseList=new ArrayList();

try{

Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
conn =DriverManager.getConnection("jdbc:microsoft:sqlserver://10.10.10.207:1433;DatabaseName=report;user=sa;password=111111");

//以输入流方式
   InputStream reportFile = getClass().getClassLoader().getResourceAsStream("carUserBd.jasper");

//以reportFile方式
//File reportFile =new File(request.getRealPath("/report/carUserBd.jasper"));

Map parameters = new HashMap();


String sqlCarUser="SELECT car.carNo, dept.Name , people.peopleName,carUse.useDescription ," +
" carUse.beginTime , carUse.planEndTime , carUse.comment , carUse.driver," +
" carUse.peopleNumber ,OneWay= case carUse.isOneWay  when 0 then '双程'  else '单程'  end, " +
"isFirst= case carUse.priority when 0  then '低' when  1  then  '中'  else  '高'  end, carUse.start , " +
"carUse.destination , people.peopleName as ratifier FROM DEPT_CARUSELOG carUse , DEPT_CARINFO car , " +
"ADMIN_ORGANIZATION dept , PUBLIC_PEOPLEINFO people WHERE carUse.id=290 and " +
"caruse.carId=car.carId and carUse.departId=dept.id and carUse.peopleId=people.peopleId";

st = conn.createStatement();
rs = st.executeQuery(sqlCarUser);

while(rs.next()){
CarUse carUse=new CarUse();
carUse.setCarNo(rs.getString(1));
carUse.setName(rs.getString(2));
carUse.setPeopleName(rs.getString(3));
carUse.setUseDescription(rs.getString(4));
carUse.setBeginTime(rs.getDate(5));
carUse.setPlanEndTime(rs.getDate(6));
carUse.setComment(rs.getString(7));
carUse.setDriver(rs.getString(8));
carUse.setPeopleNumber(rs.getString(9));
carUse.setOneWay(rs.getString(10));
carUse.setIsFirst(rs.getString(11));
carUse.setStart(rs.getString(12));
carUse.setDestination(rs.getString(13));
carUse.setRatifier(rs.getString(14));

carUseList.add(carUse);

}

JRBeanCollectionDataSource ds = new JRBeanCollectionDataSource(carUseList);

bytes =
JasperRunManager.runReportToPdf(
reportFile,
parameters,
ds);
String fileName = "test.pdf";
response.setContentType("application/pdf");
response.addHeader(
"Content-Disposition",
"attachment;filename=/"" + fileName);

response.setContentLength(bytes.length);
ServletOutputStream ouputStream = response.getOutputStream();

System.out.println("5");
ouputStream.write(bytes, 0, bytes.length);
ouputStream.flush();
ouputStream.close();

} catch (SQLException sqle) {

System.out.println("SQLException:" + sqle.getMessage());

} catch (JRException e) {
e.printStackTrace();
}catch(ClassNotFoundException cnfe){


}

%>
jasperreport可以用Collection做为数据源，这种方式比用Connection方式更为灵活方便