java开发调用iReport生成Html报表

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1 . 在java项目中新建个文件夹，将 iReport 制作生成的报表Copy到文件夹下，项目中加入相应的JAR包；

2. 编写SpringBean.java:

import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;public class SpringBeanUtil implements ApplicationContextAware  {    private static ApplicationContext applicationContext = null;    /**     * 取得存储在静态变量中的ApplicationContext.     */    public static ApplicationContext getApplicationContext() {        return applicationContext;    }    /**     * 从静态变量applicationContext中取得Bean, 自动转型为所赋值对象的类型.     */    public static Object getBean(String name) {        return  applicationContext.getBean(name);    }        /**     * 清除SpringContextHolder中的ApplicationContext为Null.     */    public static void clearHolder() {        applicationContext = null;    }    /**     * 实现ApplicationContextAware接口, 注入Context到静态变量中.     */    public void setApplicationContext(ApplicationContext applicationContext) {      //  SpringContextHolder.applicationContext = applicationContext;         this.applicationContext = applicationContext;    }   }

3.编写ReportServlet.java:

import java.io.IOException;import java.io.PrintWriter;import java.sql.DriverManager;import java.util.HashMap;import java.util.Map;import javax.activation.DataSource;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import net.sf.jasperreports.engine.JasperRunManager;

public class MReportServlet extends HttpServlet {/** * 打印HTML报表 * */private static final long serialVersionUID=1L;@Overrideprotected void service(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doGet(request, response);}public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException{//DataSource dataSource = (DataSource) SpringBeanUtil.getBean("dataSource");try {response.setContentType("text/html;charset=UTF-8");request.setCharacterEncoding("UTF-8");PrintWriter printWriter = response.getWriter();java.io.File file = null;//得到项目中的iReport文件if(request.getParameter("rpt").equals("jhw")){ file = new java.io.File(this.getServletConfig().getServletContext().getRealPath("/iReport/InventoryOverflowForInOut.jasper"));}Class.forName("oracle.jdbc.driver.OracleDriver");Map<String,Object> map = new HashMap<String,Object>();Object object = request.getParameter("ticket_id");map.put("OVERFLOW_TICKET_ID",object.toString());java.sql.Connection connection =  DriverManager.getConnection("jdbc:oracle:thin:@192.168.70.31:1521:orcl","dms_dev","dms_dev");JasperRunManager.runReportToHtmlFile(file.getPath(), map, connection);response.sendRedirect("iReport/InventoryOverflowForInOut.html?id="+object);printWriter.flush();printWriter.close();} catch (Exception e) {// TODO: handle exceptione.printStackTrace();}}}

4. 编写Web.xml:

<servlet>      <servlet-name>ireport</servlet-name>      <servlet-class>com.ilogst.ireport.MReportServlet</servlet-class>    </servlet>    <servlet-mapping>      <servlet-name>ireport</servlet-name>      <url-pattern>/ireport</url-pattern>    </servlet-mapping>

5.启动项目，根据URl传过去的值在 if else 里调用不同的报表

http://localhost:8080/iReport?rpt=jhw&ticket_id=PO201704170001

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