如何将 jsp 中描述的字段或值传递给 jasper 报告，以便它可以以 PDF 格式显示数据
How to pass the fields or values described in a jsp to jasper report so that it can display the data in PDF format
我使用 Eclipse 下面是部分代码
<!--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();
}%>
我在 Jasper 报告上预览时没有任何问题，但是当我使用 JSP 将参数传递给 Eclipse 上的 Jasper 报告时，我收到此错误“文件不以 '%PDF-' 开头。 ”为 adobe reader.
弹出 window
我尝试了以下解决方案，但仍然无效
1)改为
response.setContentType("application/pdf");
response.setContentType("application/x-pdf");
2)更新 adobe reader
3) 为 jasper 导入所有相关的 .jar
首先是你有会话属性和 request.getParameters 这样你就可以将这些参数发送到 jasper report.I 将显示一个示例以便更好地理解。
我有一个 jsp 页面，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>
点击提交按钮后，因为我有 "searchResult.jsp" 的操作，它将转到
searchResult.jsp
在 searchResult.jsp 页面我使用了 request.getParameter 这样在之前 jsp 页面输入的数据现在将进入当前 jsp 页面然后我使用会话属性因此它可以在进一步的 jsp 页面中使用，直到会话获得 ended.It 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);
然后是我的 sql 查询，我举了一个 sql 查询
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+"";
现在使用 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>
当我点击 suppose "samplePDF.jsp" 时，它会转到那个页面，然后我就这样做了
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();}
%>
在 Jasper 中我做了一些棘手的事情 things.First 我打开了一个 jasper 报告，在 "report query" 我添加了一个像 "Select * from example" 这样的查询，你可以观察 [=20] 中的所有字段=] 将显示在下方，我单击 "Ok" 并添加了静态和文本字段，最后我必须将参数从 jsp 传递到 ireport 所以我再次打开 "Report Query" 我删除了我之前写的查询，然后我现在用图像添加了这个 $P!{sql}
我使用 Eclipse 下面是部分代码
<!--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();
}%>
我在 Jasper 报告上预览时没有任何问题，但是当我使用 JSP 将参数传递给 Eclipse 上的 Jasper 报告时，我收到此错误“文件不以 '%PDF-' 开头。 ”为 adobe reader.
弹出 window我尝试了以下解决方案，但仍然无效
1)改为
response.setContentType("application/pdf");
response.setContentType("application/x-pdf");
2)更新 adobe reader
3) 为 jasper 导入所有相关的 .jar
首先是你有会话属性和 request.getParameters 这样你就可以将这些参数发送到 jasper report.I 将显示一个示例以便更好地理解。 我有一个 jsp 页面，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>
点击提交按钮后，因为我有 "searchResult.jsp" 的操作，它将转到 searchResult.jsp
在 searchResult.jsp 页面我使用了 request.getParameter 这样在之前 jsp 页面输入的数据现在将进入当前 jsp 页面然后我使用会话属性因此它可以在进一步的 jsp 页面中使用，直到会话获得 ended.It 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);
然后是我的 sql 查询，我举了一个 sql 查询
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+"";
现在使用 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>
当我点击 suppose "samplePDF.jsp" 时，它会转到那个页面，然后我就这样做了 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();}
%>
在 Jasper 中我做了一些棘手的事情 things.First 我打开了一个 jasper 报告，在 "report query" 我添加了一个像 "Select * from example" 这样的查询，你可以观察 [=20] 中的所有字段=] 将显示在下方，我单击 "Ok" 并添加了静态和文本字段，最后我必须将参数从 jsp 传递到 ireport 所以我再次打开 "Report Query" 我删除了我之前写的查询，然后我现在用图像添加了这个 $P!{sql}