java - struts2 + hibernate3 + jasper-report 5.0 ----- 得到空白报告

Question

我创建了一个应用程序，它使用 jasper report 5.0、struts2 和 hibernate 打印报告。 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，但是当我在 netbeans 中预览报告时，我收到带有数据的报告。

任何人都可以告诉我一些解决方案吗？

当报表单独运行时

通过struts2 + hibernate生成相同报告时的空白报告

我的代码如下所示

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();
  }

}

样本.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>

Answer 1

结果

JasperFillManager.fillReportToFile(dest, parameterMap);

是带文件名的字符串。该文件包含 jrPrint 对象。

如果不使用此文件，如何查看执行报告的结果？