linux内核编译步骤！

1.空数据（Empty Datasources）
就是说JRXML文件里面的内容都是静态的,直接使用
JREmptyDataSource就行了
Java代码

JasperRunManager.runReportToPdfStream(reportStream,

servletOutputStream, new HashMap(), new JREmptyDataSource());

2.Map数组（Map Datasources）
有的时候数据不一定要从数据库里面来，还有可能从Map数组里面来
成生Map[]的方法
Java代码

private Map[] initializeMapArray()

{

//你可以把数组里面的每个map看成一个对象，就相于数据库里面的每个字段

HashMap[] reportRows = new HashMap[4];

HashMap row1Map = new HashMap();

HashMap row2Map = new HashMap();

HashMap row3Map = new HashMap();

HashMap row4Map = new HashMap();

row1Map.put("tail_num", "N263Y");

row1Map.put("aircraft_serial", "T-11");

row1Map.put("aircraft_model", "39 ROSCOE TRNR RACER");

row1Map.put("engine_model", "R1830 SERIES");

row2Map.put("tail_num", "N4087X");

row2Map.put("aircraft_serial", "BA100-163");

row2Map.put("aircraft_model", "BRADLEY AEROBAT");

row2Map.put("engine_model", "R2800 SERIES");

row3Map.put("tail_num", "N43JE");

row3Map.put("aircraft_serial", "HAYABUSA 1");

row3Map.put("aircraft_model", "NAKAJIMA KI-43 IIIA");

row3Map.put("engine_model", "R1830 SERIES");

row4Map.put("tail_num", "N912S");

row4Map.put("aircraft_serial", "9973CC");

row4Map.put("aircraft_model", "PA18-150");

row4Map.put("engine_model", "R-1820 SER");

reportRows[0] = row1Map;

reportRows[1] = row2Map;

reportRows[2] = row3Map;

reportRows[3] = row4Map;

return reportRows;

}

生成JRMapArrayDataSource对象
Java代码

private JRDataSource createReportDataSource()

{

JRMapArrayDataSource dataSource;

Map[] reportRows = initializeMapArray();

dataSource = new JRMapArrayDataSource(reportRows);

return dataSource;

}

Servlet里面
Java代码

JRDataSource dataSource = createReportDataSource();

JasperRunManager.runReportToPdfStream(reportStream,

servletOutputStream, new HashMap(), dataSource);

3.Map集合
Java代码

private JRDataSource createReportDataSource()

{

JRMapCollectionDataSource dataSource;

Collection reportRows = initializeMapCollection();

dataSource = new JRMapCollectionDataSource(reportRows);

return dataSource;

}

private Collection initializeMapCollection()

{

ArrayList reportRows = new ArrayList();

HashMap row1Map = new HashMap();

HashMap row2Map = new HashMap();

HashMap row3Map = new HashMap();

HashMap row4Map = new HashMap();

row1Map.put("tail_num", "N263Y");

row1Map.put("aircraft_serial", "T-11");

row1Map.put("aircraft_model", "39 ROSCOE TRNR RACER");

row1Map.put("engine_model", "R1830 SERIES");

row2Map.put("tail_num", "N4087X");

row2Map.put("aircraft_serial", "BA100-163");

row2Map.put("aircraft_model", "BRADLEY AEROBAT");

row2Map.put("engine_model", "R2800 SERIES");

row3Map.put("tail_num", "N43JE");

row3Map.put("aircraft_serial", "HAYABUSA 1");

row3Map.put("aircraft_model", "NAKAJIMA KI-43 IIIA");

row3Map.put("engine_model", "R1830 SERIES");

row4Map.put("tail_num", "N912S");

row4Map.put("aircraft_serial", "9973CC");

row4Map.put("aircraft_model", "PA18-150");

row4Map.put("engine_model", "R-1820 SER");

reportRows.add(row1Map);

reportRows.add(row2Map);

reportRows.add(row3Map);

reportRows.add(row4Map);

return reportRows;

}

使用
Java代码

JRDataSource dataSource = createReportDataSource();

JasperRunManager.runReportToPdfStream(reportStream,

servletOutputStream, new HashMap(), dataSource);

4.对象数组（Java Objects as Datasources）对象JAVABEAN
Java代码

publicclass AircraftData

{

public AircraftData(String tail, String serial, String model,

String engine)

{

setTailNum(tail);

setAircraftSerial(serial);

setAircraftModel(model);

setEngineModel(engine);

}

public AircraftData()

{

}

private String tailNum;

private String aircraftSerial;

private String aircraftModel;

private String engineModel;

//set get method.....

}

JRXML文件
Java代码

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE jasperReport PUBLIC "//JasperReports//DTD Report Design//EN"

"http://jasperreports.sourceforge.net/dtds/jasperreport.dtd">

<jasperReport name="AircraftReport">

<field name="tailNum"class="java.lang.String"/>

<field name="aircraftSerial"class="java.lang.String"/>

<field name="aircraftModel"class="java.lang.String"/>

<field name="engineModel"class="java.lang.String"/>

<pageHeader>

<band height="30">

<staticText>

<reportElement x="0" y="0" width="69" height="24"/>

<textElement verticalAlignment="Bottom"/>

<text>

<![CDATA[Tail Number: ]]>

</text>

</staticText>

<staticText>

<reportElement x="140" y="0" width="69" height="24"/>

<text>

<![CDATA[Serial Number: ]]>

</text>

</staticText>

<staticText>

<reportElement x="280" y="0" width="69" height="24"/>

<text>

<![CDATA[Model: ]]>

</text>

</staticText>

<staticText>

<reportElement x="420" y="0" width="69" height="24"/>

<text>

<![CDATA[Engine: ]]>

</text>

</staticText>

</band>

</pageHeader>

<detail>

<band height="30">

<textField>

<reportElement x="0" y="0" width="69" height="24"/>

<textFieldExpression class="java.lang.String">

<![CDATA[$F{tailNum}]]>

</textFieldExpression>

</textField>

<textField>

<reportElement x="140" y="0" width="69" height="24"/>

<textFieldExpression class="java.lang.String">

<![CDATA[$F{aircraftSerial}]]>

</textFieldExpression>

</textField>

<textField>

<reportElement x="280" y="0" width="69" height="24"/>

<textFieldExpression class="java.lang.String">

<![CDATA[$F{aircraftModel}]]>

</textFieldExpression>

</textField>

<textField>

<reportElement x="420" y="0" width="69" height="24"/>

<textFieldExpression class="java.lang.String">

<![CDATA[$F{engineModel}]]>

</textFieldExpression>

</textField>

</band>

</detail>

</jasperReport>

调用
Java代码

private JRDataSource createReportDataSource()

{

JRBeanArrayDataSource dataSource;

AircraftData[] reportRows = initializeBeanArray();

dataSource = new JRBeanArrayDataSource(reportRows);

return dataSource;

}

private AircraftData[] initializeBeanArray()

{

AircraftData[] reportRows = new AircraftData[4];

reportRows[0] = new AircraftData("N263Y", "T-11", "39 ROSCOE TRNR

RACER", "R1830 SERIES");

reportRows[1] = new AircraftData("N4087X", "BA100-163", "BRADLEY

AEROBAT", "R2800 SERIES");

reportRows[2] = new AircraftData("N43JE", "HAYABUSA 1", "NAKAJIMA

KI-43 IIIA", "R1830 SERIES");

reportRows[3] = new AircraftData("N912S", "9973CC", "PA18-150",

"R-1820 SER");

return reportRows;

}

//最后servlet里面调用

JRDataSource dataSource = createReportDataSource();

JasperRunManager.runReportToPdfStream(reportStream,

servletOutputStream, new HashMap(), dataSource);

5.对象集合
和对象数组基本上一样,就是最后生成的是JRBeanCollectionDataSource
Java代码

private JRDataSource createReportDataSource()

{

JRBeanCollectionDataSource dataSource;

Collection reportRows = initializeBeanCollection();

dataSource = new JRBeanCollectionDataSource(reportRows);

return dataSource;

}

JRDataSource dataSource = createReportDataSource();

JasperRunManager.runReportToPdfStream(reportStream,

servletOutputStream, new HashMap(), dataSource);

6.XML数据成生报表（XML as Datasource）Xml代码

<?xmlversion="1.0"encoding="UTF-8"?>

<AircraftData>

<aircraft>

<tail_num>N263Y</tail_num>

<aircraft_serial>T-11</aircraft_serial>

<aircraft_model>39 ROSCOE TRNR RACER</aircraft_model>

<engine_model>R1830 SERIES</engine_model>

</aircraft>

<aircraft>

<tail_num>N4087X</tail_num>

<aircraft_serial>BA100-163</aircraft_serial>

<aircraft_model>BRADLEY AEROBAT</aircraft_model>

<engine_model>R2800 SERIES</engine_model>

</aircraft>

<aircraft>

<tail_num>N43JE</tail_num>

<aircraft_serial>HAYABUSA 1</aircraft_serial>

<aircraft_model>NAKAJIMA KI-43 IIIA</aircraft_model>

<engine_model>R1830 SERIES</engine_model>

</aircraft>

<aircraft>

<tail_num>N912S</tail_num>

<aircraft_serial>9973CC</aircraft_serial>

<aircraft_model>PA18-150</aircraft_model>

<engine_model>R-1820 SER</engine_model>

</aircraft>

</AircraftData>

这样获得
Java代码

JRXmlDataSource xmlDataSource = new JRXmlDataSource(

new BufferedInputStream(getServletConfig().getServletContext()

.getResourceAsStream("/reports/AircraftData.xml")),

"/AircraftData/aircraft");

JREmptyDataSource,JRMapArrayDataSource,JRMapCollectionDataSource,JRBeanArrayDataSource,JRBeanCollectionDataSource,JRXmlDataSource
他们都implements JRDataSource
主要目地就是不从数据库里面取数据，这个方面和Hibernate结合