spring mvc整合ireport终极解结方案，解决HTML图片不显示的问题

最新推荐文章于 2017-08-15 14:24:46 发布

Joker_Ye

最新推荐文章于 2017-08-15 14:24:46 发布

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本文介绍了一种基于Spring框架的自定义JasperReports报表解决方案，通过创建CustomReportView类来实现多格式报表的生成，并详细展示了如何配置Spring beans及在web应用中使用此自定义视图。

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</pre><p></p><p>jasper-views.xml</p><pre name="code" class="html"><?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
	xsi:schemaLocation="
		http://www.springframework.org/schema/beans 
		http://www.springframework.org/schema/beans/spring-beans-3.2.xsd">
 	<bean id="reportView" class="com.weixin.yzh.controller.wsTest.CustomReportView">
		<!-- <property name="url" value="/WEB-INF/jasper/report2.jasper"/> -->
		<property name="reportDataKey" value="jrMainDataSource"/>
		<property name="exporterParameters">  <!-- 渲染时的相关参数 -->
			<map>
				<entry key="net.sf.jasperreports.engine.export.JRHtmlExporterParameter.IMAGES_URI" value="../image?image="/>  <!-- HTML时的白色背景图片(px)路径 -->
				<entry key="net.sf.jasperreports.engine.export.JRHtmlExporterParameter.CHARACTER_ENCODING" value="UTF-8"/>
			</map>
		</property>
	</bean>
</beans>

自定义JasperReportsMultiFormatView：

package com.weixin.yzh.controller.wsTest;

import Java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.j2ee.servlets.ImageServlet;

import org.springframework.web.servlet.view.jasperreports.JasperReportsMultiFormatView;

public class CustomReportView extends JasperReportsMultiFormatView {
private JasperReport report;

public CustomReportView() {
super();
}

protected JasperPrint fillReport(Map<String, Object> model) throws Exception {
if (model.containsKey("url")) {
setUrl(String.valueOf(model.get("url")));
this.report = loadReport();
}

return super.fillReport(model);
}

protected JasperReport getReport() {
return this.report;
}

// @Override
// protected void renderReport(JasperPrint populatedReport,
// Map<String, Object> model, HttpServletResponse response)
// throws Exception {
// if (model.containsKey("requestObject")) {
// HttpServletRequest request = (HttpServletRequest) model.get("requestObject");
// request.getSession().setAttribute(ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE, populatedReport);
// }
// super.renderReport(populatedReport, model, response);
// }
/*@Override
protected void postProcessReport(JasperPrint populatedReport, Map model)
throws Exception {

// HTML reports need the JasperPrint object in the session
if ("html".equalsIgnoreCase((String) model.get("format"))) {
session.setAttribute(
ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE,
populatedReport);
}
}*/
}

servlet里面的配置

<bean id="jasperReportResolver" class="org.springframework.web.servlet.view.XmlViewResolver">
<property name="order">
<value>0</value>
</property>
<property name="location">
<value>classpath:/src-resources/jasper-views.xml</value>
</property>

</bean>

web.xml里面的配置

<servlet>
<servlet-name>JasperReportImageServlet</servlet-name>
<servlet-class>net.sf.jasperreports.j2ee.servlets.ImageServlet</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>JasperReportImageServlet</servlet-name>
<url-pattern>/image</url-pattern>
</servlet-mapping>

测试代码：

@RequestMapping("/customerReport2")
public String report(Model model) {
List<TasteModel> tasteModelList = tasteModelService.queryTasteModelAll();

// 报表数据源
JRDataSource jrDataSource = new JRBeanCollectionDataSource(tasteModelList);

// 动态指定报表模板url
model.addAttribute("url", "/WEB-INF/jasper/TasteModelTest.jasper");
model.addAttribute("format", "html"); // 报表格式
model.addAttribute("jrMainDataSource", jrDataSource);

// <property name="IMAGES_URI" value="/servlets/image?image="/>

return "reportView"; // 对应jasper-views.xml中的bean id
}