struts2 + hibernate3 + jasper-report 5.0 -----得到空白报告 [英] struts2 + hibernate3 + jasper-report 5.0 ----- getting blank report
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问题描述
我创建了一个应用程序，它使用jasper report 5.0，struts2和hibernate打印出一个报告。 jasper报告使用hql。
该应用程序工作正常，但问题是，当我触发struts操作时，我在浏览器中收到空白报告，但当我在netbeans中预览报告时，我收到报告时数据。
i've created an application which prints out a report using jasper report 5.0, struts2 and hibernate. The jasper report uses hql. The app works fine but the problem is that i'm getting blank report in browser when i triggered the struts action, but when i preview the report in netbeans i'm getting the report with datas.
任何人都可以告诉我一些解决方案。
can anyone please tell me some solution for this.
当报告单独运行时
通过struts2 + hibernate生成相同报告时的空白报告
Blank report when same report is generated through struts2 + hibernate
我的代码如下：
struts.xml
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<package name="default" extends="struts-default,jasperreports-default">
<result-types>
<result-type name="jasper" class="org.apache.struts2.views.jasperreports.JasperReportsResult" />
</result-types>
<action name="getpdf" class="commonpackage.HibernateClass" method="getpdf">
<result name="success" type="jasper">
<param name="location">/Reports_HSE/sample.jasper</param>
<param name="dataSource">myList</param>
<param name="format">PDF</param>
</result>
</action>
</package>
</struts>
HibernateClass.java
public class HibernateClass {
private List<PeopleBean> myList;
Session session;
SessionFactory sessionFactory;
public String getpdf()
{
String dest = ServletActionContext.getServletContext().getRealPath("/Reports_HSE/sample.jasper");
session = createSession();
Map parameterMap = new HashMap();
parameterMap.put(
JRHibernateQueryExecuterFactory.PARAMETER_HIBERNATE_SESSION, session);
try
{
System.out.println("Filling report...");
JasperFillManager.fillReportToFile(dest, parameterMap);
System.out.println("Done!");
return "success";
}
catch (JRException e)
{
System.out.println("There was an error filling the report.");
e.printStackTrace();
return "error";
}
}
public List getMyList() {
return myList;
}
private Session createSession()
{
SessionFactory sessionFactory = new Configuration().configure()
.buildSessionFactory();
return sessionFactory.openSession();
}
}
sample.jrxml
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="HibernateQueryDemoReport" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="30" bottomMargin="30" uuid="398cbfdc-5535-4373-bd84-38d1f6d0e677">
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<parameter name="countryCode" class="java.lang.String"/>
<queryString language="hql">
<![CDATA[FROM DepartmentMaster]]>
</queryString>
<field name="id" class="java.lang.Integer"/>
<field name="abcCode1" class="java.lang.String"/>
<field name="abcCode2" class="java.lang.String"/>
<field name="deptCode" class="java.lang.String"/>
<field name="deptName" class="java.lang.String"/>
<field name="status" class="java.lang.String"/>
<field name="createdDate" class="java.util.Date"/>
<field name="modifiedDate" class="java.util.Date"/>
<title>
<band height="30" splitType="Stretch">
<textField>
<reportElement uuid="7c7dd6c2-fb3d-4540-a37d-9c7038a1c5ea" x="0" y="0" width="555" height="30"/>
<textElement/>
<textFieldExpression><![CDATA["Aircraft Registered in Country Code: " ]]></textFieldExpression>
</textField>
</band>
</title>
<pageHeader>
<band height="30" splitType="Stretch">
<staticText>
<reportElement uuid="5bd34faa-d13d-4ac0-ab94-c86bc8950920" x="0" y="0" width="100" height="30"/>
<textElement/>
<text><![CDATA[
Tail Number
]]></text>
</staticText>
<staticText>
<reportElement uuid="456f1a7f-7255-4bcc-90ef-1673152ec19d" x="100" y="0" width="100" height="30"/>
<textElement/>
<text><![CDATA[
Serial Number
]]></text>
</staticText>
<staticText>
<reportElement uuid="84e80378-0e25-4d15-acd5-d368feda4982" x="200" y="0" width="100" height="30"/>
<textElement/>
<text><![CDATA[
Year Built
]]></text>
</staticText>
</band>
</pageHeader>
<detail>
<band height="30" splitType="Stretch">
<textField>
<reportElement uuid="5cef4310-14c8-4b6b-9204-99e2fcbfae15" x="0" y="0" width="100" height="30"/>
<textElement/>
<textFieldExpression><![CDATA[$F{id}]]></textFieldExpression>
</textField>
<textField>
<reportElement uuid="52648e98-f0cd-4f21-9f2d-2f9db2429fb4" x="100" y="0" width="100" height="30"/>
<textElement/>
<textFieldExpression><![CDATA[$F{deptName}]]></textFieldExpression>
</textField>
<textField>
<reportElement uuid="533185fe-64cf-4839-b0f8-05fbeb2b5fe9" x="200" y="0" width="100" height="30"/>
<textElement/>
<textFieldExpression><![CDATA[$F{deptCode}]]></textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>
推荐答案
我遇到了同样的问题，所以我删除了Struts2 -JasperReports-Plugin jar并自己写出口代码。这很简单！
I faced the same problem, so I removed the Struts2-JasperReports-Plugin jar and wrote the exporting code myself. It is very simple!
public void exportReport() {
try {
ServletOutputStream outputStream = ServletActionContext.getResponse().getOutputStream();
Map<string, Object> parameters = new HashMap<>();
parameters.put("id","1");
//Get the parameters and report according to your application
byte[] bytes = JasperRunManager.runReportToPdf(jasperReport, parameters, myList);
//Setting the response as a downloadable attachment
ServletActionContext.getResponse().setContentType("application/pdf");
ServletActionContext.getResponse().setHeader("Content-Disposition: attachment", "inline; filename=report.pdf");
outputStream.write(bytes, 0, bytes.length);
outputStream.flush();
outputStream.close();
} catch(Exception e) {
addActionError("Unable to generate report");
}
}
导出到XLS非常有用类似的方式。
Exporting to XLS works in a very similar manner.
编辑：从连接对象更改为数据源
Changed from connection object to datasource
这篇关于struts2 + hibernate3 + jasper-report 5.0 -----得到空白报告的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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