jasperreports中图片的填充方式

1、首先是用ireport设计报表，个人设计的如下：

设计代码如下：

<?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="Image" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="0342f951-157c-4709-b85e-daba5d610ba9">
	<property name="ireport.zoom" value="1.0"/>
	<property name="ireport.x" value="0"/>
	<property name="ireport.y" value="0"/>
	<style name="normalStyle" isDefault="true" forecolor="#000000" backcolor="#FFFFFF" hAlign="Left" vAlign="Middle" isBlankWhenNull="true" fontName="宋体" fontSize="12" isBold="false" pdfFontName="STSong-Light" pdfEncoding="UniGB-UCS2-H" isPdfEmbedded="true"/>
	<parameter name="image" class="java.io.InputStream"/>
	<parameter name="image2" class="java.lang.Object"/>
	<parameter name="image3" class="java.lang.String"/>
	<background>
		<band splitType="Stretch"/>
	</background>
	<summary>
		<band height="351" splitType="Stretch">
			<image>
				<reportElement x="0" y="0" width="113" height="75" uuid="6645d932-3fb1-42a3-aee8-d0c3ff82728b"/>
				<imageExpression><![CDATA[$P{image3}]]></imageExpression>
			</image>
			<image>
				<reportElement x="113" y="0" width="115" height="75" uuid="0fe88379-8aeb-4e37-883a-bc3418819793"/>
				<imageExpression><![CDATA[new java.io.File("C:\\Users\\caoyunyun\\Desktop\\下载.jpg")]]></imageExpression>
			</image>
			<image>
				<reportElement x="228" y="0" width="112" height="75" uuid="227fecec-989b-4ff5-a135-40141b097c88"/>
				<imageExpression><![CDATA[new java.net.URL($P{image3})]]></imageExpression>
			</image>
			<image>
				<reportElement x="340" y="0" width="113" height="75" uuid="63321ae6-538c-4265-bb64-f5a94edb7c98"/>
				<imageExpression><![CDATA[$P{image}]]></imageExpression>
			</image>
			<image>
				<reportElement x="0" y="75" width="113" height="76" uuid="7282ea0c-0467-435d-b7c5-26d6ef048011"/>
				<imageExpression><![CDATA[$P{image2}]]></imageExpression>
			</image>
		</band>
	</summary>
</jasperReport>
           

这里Image有一个比较重要的属性：on Error Type

默认是选Error,如果图片加载不到（比如图片不存、传参错误之类的），就会报错

Blank是如果加载不到图片，就显示空白，不会报错

Icon是如果加载不到图片，就会显示默认的图标

2、导出代码（用的springMVC注解）

@RequestMapping(value = "reportImageAsPdf")
	public String reportImageAsPdf(HttpServletRequest request, HttpServletResponse response){
		String path = request.getSession().getServletContext().getRealPath("/");
		//报表文件的路径
		String filepath = path + "WEB-INF/page/report/Image.jasper";
		//项目下一张图片的路径
		String imagePath = path+"WEB-INF/page/image/b.png";
		filepath = filepath.replace("\\", "/");
		imagePath = imagePath.replace("\\", "/");
		try {
			ServletOutputStream sosRef = response.getOutputStream();
			HashMap map = new HashMap();
			//读取项目下的一张图片
			InputStream is = new FileInputStream(imagePath); 
			//读取本地的一张图片
			Image img = ImageIO.read(new FileInputStream("f:/image/e.jpg"));
			map.put("image", is);//流
			map.put("image2", img);//Image
			map.put("image3", "https://img0.bdstatic.com/static/searchdetail/img/logo-2X_b99594a.png");
			//加载报表文件
			JasperReport jasperReport = (JasperReport) JRLoader.loadObject(new File(filepath));
			//填充报表
			JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, map, new JREmptyDataSource());
			List<JasperPrint> jasperPrintList = new ArrayList<JasperPrint>();
			jasperPrintList.add(jasperPrint);
			response.setContentType("application/pdf");
			//报表导出
			JRPdfExporter exporter = new JRPdfExporter();
			SimpleExporterInput sei = SimpleExporterInput.getInstance(jasperPrintList);
            SimpleOutputStreamExporterOutput soseo = new SimpleOutputStreamExporterOutput(sosRef);
            exporter.setExporterInput(sei);
            exporter.setExporterOutput(soseo);
            exporter.exportReport();
            sosRef.flush();
            sosRef.close();
            is.close();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (JRException e) {
			e.printStackTrace();
		} 
		return null;
	}
           

测试结果如下：