[英]How to pass the fields or values described in a jsp to jasper report so that it can display the data in PDF format
我在下面使用Eclipse是代碼的一部分
<!--menu.jsp-->
<h1>Pass parameter to jasper report(CI_ID)</h1>
<form action = "call.jsp" target="_blank">
<input type= "text" name = "CI_ID" value = ""/><br/>
<input type="submit" value="Print"/>
</form>
<!--call.jsp-->
<%Connection conn = null;
int id=Integer.parseInt(request.getParameter("CI_ID"));
try{
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","1234");
File reportFile = new File(application.getRealPath("//Report.jasper"));
Map parameters = new HashMap();
parameters.put("CI_ID",id);
byte[] bytes = JasperRunManager.runReportToPdf(reportFile.getPath(),parameters,conn);
response.setContentType("application/pdf");
response.setContentLength(bytes.length);
ServletOutputStream outStream = response.getOutputStream();
outStream.write(bytes, 0 , bytes.length);
response.getOutputStream().flush();
response.getOutputStream().close();
} catch (Exception e){
e.printStackTrace();
}%>
我可以在Jasper報表上預覽而沒有任何問題,但是當我使用JSP在Eclipse上將參數傳遞給Jasper報表時,出現此錯誤“文件不是以'%PDF-'開頭。” Adobe Reader的彈出窗口。
我嘗試了以下解決方案,但仍無法正常工作
1)更改為
response.setContentType("application/pdf");
response.setContentType("application/x-pdf");
2)更新Adobe Reader
3)將所有相關的.jar導入jasper
首先是您具有會話屬性和request.getParameters,以便可以將這些參數發送到jasper報告。我將顯示一個示例,以使您更好地理解。 我有一個jsp頁面,例如searchData.jsp
<form action="searchResult.jsp" method="POST">
<table border="0" width="" cellspacing="15" cellpadding="1">
<thead>
<tr>
<th>Search Using:</th>
<th><select name="search">
<option value=""> Select</option>
<option value="Company Name">Company Name</option>
<option value="Contact Person">Contact Person</option>
<option value="Phone">Phone Number</option>
</select></th>
<th><input type="text" name="search_tf" /></th>
<th><input type="submit" value=" " class="search_btn"/></th>
</tr>
</thead>
<tr>
<td></td><td></td><td></td><td></td>
<td><small>(Blank Search will result in Full Search Result)</small></td>
</tr>
</table>
</form>
單擊提交按鈕后,因為我的操作為“ searchResult.jsp”,它將轉到searchResult.jsp
在searchResult.jsp頁面中,我使用了request.getParameter
以便在上一個jsp頁面中輸入的數據現在將進入當前的jsp頁面中,然后我使用了會話屬性,以便可以在其他jsp頁面中使用它直到會話結束。如下所示
Search Result for <u><%= request.getParameter("search_tf")%></u> in <u><%= request.getParameter("search")%></u> is :
Object o2 = session.getAttribute("email");
String email = o2.toString();
String category = request.getParameter("category");
String search = request.getParameter("search");
session.setAttribute("search",search);
String search_tf = request.getParameter("search_tf");
session.setAttribute("search_tf",search_tf);
然后我的SQL查詢,我給一個SQL查詢的例子
if(search.equals("")&& search_tf.equals("")){
sqlPgintn="SELECT SQL_CALC_FOUND_ROWS Id,Company_name,Contact_Person,Address,Phone,Company_Email,Review,Status,Lead_Date,Lead_Details,Lead_Value,followup_Date,Category from marketing_database.lead limit "+iPagNo+","+iSwRws+"";
}
else if(search.equals("Company Name"))
{
sqlPgintn="SELECT SQL_CALC_FOUND_ROWS Id,Company_name,Contact_Person,Address,Phone,Company_Email,Review,Status,Lead_Date,Lead_Details,Lead_Value,followup_Date,Category from marketing_database.lead where Company_Name ='"+search_tf+"' limit "+iPagNo+","+iSwRws+"";
現在使用JavaScript我做到了
<script type="text/javascript">
function generateReport() {
var e = document.getElementById("idOfYourSelectYouNeedToAddedIt");
var strPage = e.options[e.selectedIndex].value;
window.open(strPage);
return false; //This make you stay on this page;
//return true; //Set the action tag in the form to the page you like to go to!
}
</script>
<center> <form name="myForm" onsubmit="return generateReport()">
<select id = "idOfYourSelectYouNeedToAddedIt">
<option value=''> Generate Report </option>
<option value='samplePDF.jsp'> PDF</option>
<option value='sampleDOC.jsp'> DOC </option>
<option value='sampleXLS.jsp'> XLS</option>
<option value='sampleXLSX.jsp'> XLSX </option>
</select>
<br/>
<input type="submit" value="Submit">
</form></center>
當我單擊“ samplePDF.jsp”時,它將轉到該頁面,在那里我執行了這個samplePDF.jsp
<%
Connection conn = null;
Object o2 = session.getAttribute("email");
String email = o2.toString();
String category=(String)session.getAttribute("category");
String status=(String)session.getAttribute("status");
String startDate=(String)session.getAttribute("startDate");
String endDate=(String)session.getAttribute("endDate");
try
{
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/marketing_database","root","root");
String sql = "select * from lead where Email = '" + email + "' AND Status LIKE '%" + status + "%' AND Category LIKE '%" + category + "%' AND STR_TO_DATE(`Lead_Date`, '%d-%m-%Y') BETWEEN '"+startDate+"' AND '"+endDate+"'";
ServletContext context = request.getServletContext();
String fullPath = context.getRealPath("/WEB-INF/reports/report10.jrxml");
InputStream input = new FileInputStream(new File(fullPath));
JasperDesign jasperDesign = JRXmlLoader.load(input);
System.out.println("Compiling Report Designs");
JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
System.out.println("Creating JasperPrint Object");
HashMap<String,Object> map = new HashMap<String,Object>();
map.put("sql",sql);
byte[] bytes = JasperRunManager.runReportToPdf(jasperReport, map, conn);
response.setContentType("application/pdf");
response.setContentLength(bytes.length);
ServletOutputStream outStream = response.getOutputStream();
outStream.write(bytes, 0, bytes.length);
outStream.flush();
outStream.close();
conn.close();
}
catch(Exception e)
{e.printStackTrace();}
%>
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