Struts2 + JasperReport应用二：jasperReport Web形式打印
将jasperReport设计文件和编译文件放到webRoot下面的jasper文件夹下面。public class Person {private String person_Id;private String person_name;private String person_age;private String person_address;}
public class PersonService {public List<Person> getAllPerson() {List<Person> perList = new ArrayList<Person>();perList.add(new Person("101", "小博", "22", "湖北"));perList.add(new Person("102", "张三", "21", "湖南"));perList.add(new Person("103", "李四", "23", "江苏"));perList.add(new Person("104", "王五", "22", "上海"));return perList;}}
构造我们的applet如下：
public class JRPrinterApplet extends javax.swing.JApplet {private URL url = null;public void init() {String strUrl = getParameter("REPORT_URL");if (strUrl != null) {try {url = new URL(getCodeBase(), strUrl);// 从获得html参数中获得报表URL// System.out.println("url=" + url.toURI());//要是servlet的路径} catch (Exception e) {StringWriter swriter = new StringWriter();PrintWriter pwriter = new PrintWriter(swriter);e.printStackTrace(pwriter);JOptionPane.showMessageDialog(this, swriter.toString());}} else {JOptionPane.showMessageDialog(this, "Source URL not specified");}}public void start() {if (url != null) {try {Object obj = JRLoader.loadObject(url);// 发送对象请求，获得JasperPrint对象JasperPrintManager.printReport((JasperPrint) obj, true);// 调用方法打印所获得的JasperPrint对象} catch (Exception e) {e.printStackTrace();}}}} 构造我们的action如下：
public class JRPrintAction extends ActionSupport {@Overridepublic String execute() throws Exception {File reportFile = new File(ServletActionContext.getRequest().getRealPath("/jasper/preson.jasper"));Map<String, String> parameters = new HashMap<String, String>();parameters.put("year", "2009");parameters.put("unit_mc", "武汉XX科技有限公司");List<Person> personList = new PersonService().getAllPerson();JasperPrint jasperPrint = null;try{JasperReport jasperReport = (JasperReport) JRLoader.loadObject(reportFile);jasperPrint = JasperFillManager.fillReport(jasperReport, parameters,new JRBeanCollectionDataSource(personList));}catch (Exception e) {throw e;}if(null != jasperPrint){HttpServletResponse response = ServletActionContext.getResponse();response.setContentType("application/octet-stream");ServletOutputStream ouputStream = response.getOutputStream();ObjectOutputStream oos = new ObjectOutputStream(ouputStream);oos.writeObject(jasperPrint);oos.flush();oos.close();ouputStream.flush();ouputStream.close();}return null;}}
struts.xml配置如下：
<action name="jrPrint"class="com.mengya.action.JRPrintAction"><result name="success">/index.jsp</result></action> web.xml配置如下：
<filter><filter-name>Struts2</filter-name><filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class></filter><filter-mapping><filter-name>Struts2</filter-name><url-pattern>/*</url-pattern></filter-mapping>
将JRPrinterApplet的编译文件放到webRoot下面的applet文件夹下面
页面调用如下：
<input type="button" value="打印" name="button1" ><script>function print(){ var url = "jrPrint.action"; document.write('<APPLET ID="JrPrt" CODE = "JRPrinterApplet.class" CODEBASE = "applets" ARCHIVE = "jasperreports-3.5.2-applet.jar,commons-logging-1.0.2.jar,commons-collections-2.1.jar" WIDTH = "0" HEIGHT = "0">'); document.write('<PARAM NAME = "type" VALUE="application/x-java-applet;version=1.2.2">'); document.write('<PARAM NAME = "scriptable" VALUE="false">'); document.write('<PARAM NAME = "REPORT_URL" VALUE ="'+url+'">'); document.write('</APPLET>'); }</script>
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