问题描述
我正在尝试从列表中生成一个简单的 JR 报告。
I am trying to generate a simple JR report from a list.
我一直在错误从中检索字段值bean:name
此错误是由于错误的getter方法名称,因为jasper使用反射从bean中获取字段。但是,即使在更正了getter方法名称之后。我一直得到这个例外。还有其他问题吗?
This error comes due to wrong getter method-name since jasper uses reflection to take the fields from a bean. However even after correcting the getter method-name. I keep getting this exception. Is there any other problem?
我的 jrxml 文件是
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE jasperReport PUBLIC "//JasperReports//DTD Report Design//EN" "http://jasperreports.sourceforge.net/dtds/jasperreport.dtd">
<jasperReport name="simpleReport">
<field name="name" class="java.lang.String"/>
<field name="count" class="java.lang.String"/>
<title>
<band height="50">
<staticText>
<reportElement x="0" y="0" width="180" height="15"/>
<textElement/>
<text><![CDATA[Report]]></text>
</staticText>
</band>
</title>
<pageHeader>
<band/>
</pageHeader>
<columnHeader>
<band height="20">
<staticText>
<reportElement x="180" y="0" width="180" height="20"/>
<textElement>
<font isUnderline="true"/>
</textElement>
<text><![CDATA[Event Name]]></text>
</staticText>
<staticText>
<reportElement x="360" y="0" width="180" height="20"/>
<textElement>
<font isUnderline="true"/>
</textElement>
<text><![CDATA[Count]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="20">
<textField>
<reportElement x="180" y="0" width="180" height="15"/>
<textElement/>
<textFieldExpression><![CDATA[$F{name}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="360" y="0" width="180" height="15"/>
<textElement/>
<textFieldExpression><![CDATA[$F{count}]]></textFieldExpression>
</textField>
</band>
</detail>
<columnFooter>
<band/>
</columnFooter>
<pageFooter>
<band height="15">
<staticText>
<reportElement x="0" y="0" width="40" height="15"/>
<textElement/>
<text><![CDATA[Page:]]></text>
</staticText>
<textField>
<reportElement x="40" y="0" width="100" height="15"/>
<textElement/>
<textFieldExpression class="java.lang.Integer"><![CDATA[$V{PAGE_NUMBER}]]></textFieldExpression>
</textField>
</band>
</pageFooter>
<summary>
<band/>
</summary>
</jasperReport>
Bean类是
class EventBean {
private String name;
private String count;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCount() {
return count;
}
public void setCount(String count) {
this.count = count;
}
}
class EventNameList {
public ArrayList<EventBean> getDataBeanList() {
ArrayList<EventBean> list = new ArrayList<EventBean>();
list.add(generate("Flow", "100"));
list.add(generate("Non flow", "300"));
list.add(generate("Allow", "600"));
list.add(generate("Deny", "50"));
return list;
}
private EventBean generate(String name, String country) {
EventBean bean = new EventBean();
bean.setName(name);
bean.setCount(country);
return bean;
}
}
我在这里生成报告
JasperCompileManager.compileReportToFile(inpuutjrxml, outputjasper);
EventNameList list = new EventNameList();
JRBeanCollectionDataSource beanList = new JRBeanCollectionDataSource(list.getDataBeanList());
JasperPrint jasperPrint = JasperFillManager.fillReport(outputjasper, new HashMap(), beanList);
JasperExportManager.exportReportToPdfStream(jasperPrint, new FileOutputStream(pefoutput));
我们是否需要对bean类进行更多修改?
Do we need to make any more modification to bean class?
推荐答案
解决方案非常简单 - 您应该将 JavaBean 类的访问修饰符更改为 public 。
The solution is very simple - you should change the access modifier of JavaBean class to public.
喜欢这样:
public class EventBean {
private String name;
private String count;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getCount() {
return count;
}
public void setCount(String count) {
this.count = count;
}
}
不要忘记您使用自己的包裹。
Don't forget that you are using your own package.
您可以找到有关 JavaBean数据源的更多信息
这篇关于使用JasperReports API生成报告时无法从JavaBean检索值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!