jasperreport 追加新报表（2）

用ireport做好模版后，如果要新加一个打印页，如果是新手，直接修改模版应该是理想情况，

可是什么数据源 feild,parameter,var，subreport ,还有路径,

真的可以让一个人疯掉，（关键这些东西组织在一起跑不了，主要是要动态的出现这些新页，就是说要动态控制这些新页的数量以及要不要出现），

还好，想到如果直接用java在外部控制，就可以易如反掌了，毕竟java的东西自己熟，

幸运的看到一篇关于 ireport追加新页的文章

（是英文的，有时候不得不承认啊，谷歌是比度娘给力，关键是公司网络的各种墙，连个CSDN 、ITEYE都不给上，逼我学英文...）

写怎么添加时候绕来绕去，读完理解最关键的一个方法或思路：

主要是往已有的 JasperPrint 对象中addPage（）。

　　private JasperPrint multipageLinking(JasperPrint page1, JasperPrint page2) {
　　　　List pages = page2.getPages();
　　　　for (int count = 0; count <pages.size(); count++) {
　　　　　　page1.addPage((JRPrintPage) pages.get(count));
　　　　}
　　　　return page1;
　　}

如果你有更多的页要添加，或者有更复杂的逻辑要执行，你可以在外部来调用这个方法

最后制作得到  JasperPrint 对象 jp  然后用下面方法做打印显示

JasperViewer.viewReport(jp,false);

最后给出完整的一个例子，xml文件没提供，DOM4J所需的包有三个自己下载，

dom4j-1.5.1.jar
jaxen-1.1.1.jar
saxpath-1.0-FCS.jar

（findjar.com是个好地方），关于org.w3c.dom.Document 与org.dom4j.Document互转可以自己找，我的另一个文章中有：

 package ec.export.checksheet;

 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 import net.sf.jasperreports.engine.JREmptyDataSource;
 import net.sf.jasperreports.engine.JRException;
 import net.sf.jasperreports.engine.JRPrintPage;
 import net.sf.jasperreports.engine.JasperFillManager;
 import net.sf.jasperreports.engine.JasperPrint;
 import net.sf.jasperreports.engine.JasperReport;
 import net.sf.jasperreports.engine.util.JRLoader;
 import net.sf.jasperreports.view.JasperViewer;

 import org.dom4j.Document;
 import org.dom4j.DocumentException;
 import org.dom4j.io.SAXReader;

 import ec.export.ECReportHelper;
 import ec.utils.Dom4jXml;

 public class AddCheckSheet {

     public  Dom4jXml dj = new Dom4jXml();

     public JasperPrint FormTotalPage(JasperPrint jp,org.w3c.dom.Document document,Map mSelectCheckSheet){
         List l=new ArrayList();
         try {
             l=CheckSheetReadXml(document);
         } catch (Exception e1) {
             // TODO Auto-generated catch block
             e1.printStackTrace();
         }

         //jasper template put to this class dir path
         String jasperpatha=getClass().getResource("")+"checksheeta.jasper";
         jasperpatha=jasperpatha.replaceAll("file:/", "");
         String jasperpathb=getClass().getResource("")+"checksheetb.jasper";
         jasperpathb=jasperpathb.replaceAll("file:/", "");
         for(int i=0;i<l.size();i++){

             if(mSelectCheckSheet.containsKey(((Map)l.get(i)).get("cs_Model")))
             {
                     // ========for checksheeta.jasper=======
                     JasperPrint jasperprint = new JasperPrint();
                     try {
                         jasperprint = JasperFillManager.fillReport(jasperpatha, (Map)l.get(i), new JREmptyDataSource());
                     } catch (Exception e) {
                         e.printStackTrace();
                     }
                      //System.out.println(" before jp: "+jp.getPages().size());
                      multipageLinking(jp,jasperprint);
                      //System.out.println(" after jp: "+jp.getPages().size()); 

                     // =======for checksheetb.jasper=======
                     jasperprint = new JasperPrint();
                     try {
                         jasperprint = JasperFillManager.fillReport(jasperpathb, (Map)l.get(i), new JREmptyDataSource());
                     } catch (Exception e) {
                         e.printStackTrace();
                     }
                     //System.out.println(" before jp: "+jp.getPages().size());
                     multipageLinking(jp,jasperprint);
                     //System.out.println(" after jp: "+jp.getPages().size());
             }
         }
         return jp;
     }

    private JasperPrint multipageLinking(JasperPrint page1, JasperPrint page2) {
         List pages = page2.getPages();
         for (int count = 0; count <pages.size(); count++) {
           page1.addPage((JRPrintPage) pages.get(count));
         }
         return page1;
     }

     public static void main(String[] args) throws Exception {
         Dom4jXml dj = new Dom4jXml();
         AddCheckSheet acs=new AddCheckSheet();
         SAXReader saxReader = new SAXReader();
         Document document;
         try {
             document = saxReader.read(new File("D:/Task/draw_cs3/20141218/wcfx36_more.xml"));
             JasperPrint jp=null;
              // acs.CheckSheetReadXml(dj.parse(document));
              Map mSelectCheckSheet=new HashMap();
              jp=acs.FormTotalPage(jp,dj.parse(document),mSelectCheckSheet);
              JasperViewer.viewReport(jp,false);
         } catch (DocumentException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }
 }

public List CheckSheetReadXml(org.w3c.dom.Document doc) throws Exception{
        Document document=dj.parse(doc);
        List pl=new ArrayList();

            //count product num
            List list = document.selectNodes("/report/job/product");
            int num = list.size();

            for(int i=1;i<=num;i++)
            {
                Map mproduct=new HashMap();
                //0 select_date
                String xpathstr="/report/job/@select_date";
                    mproduct.put("cs_Date", dj.getContentString(document,xpathstr));
                //model  1 AT3ARF1R AT5CRF4R
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Screw Compressor Water Cooled Package Chiller']/row/field[name='Model #']/value";
                    String s1=dj.getContentString(document,xpathstr);
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Screw Compressor Water Cooled Package Chiller']/row/field[name='Component code']/value";
                    String tmep=dj.getContentString(document,xpathstr);
                    tmep=tmep.substring(2);
                    String tempbefore=tmep.substring(3);
                    String tempafter=tmep.substring(0,3);
                    tmep=tempbefore+tempafter;
                mproduct.put("cs_Model", s1+tmep);

                xpathstr="/report/job/product["+i+"]/qty";
                    mproduct.put("cs_Qty", dj.getContentString(document,xpathstr));

                //evap  2
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col1/field[contains(name,'Entering fluid temp')]/value";
                    mproduct.put("cs_Evap_Entering_fluid_temp", dj.getContentString(document,xpathstr));
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col1/field[contains(name,'Fluid flow rate')]/value";
                    mproduct.put("cs_Evap_Fluid_flow_rate", dj.getContentString(document,xpathstr));
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col1/field[contains(name,'Fouling factor')]/value";
                    mproduct.put("cs_Evap_Fouling_factor", dj.getContentString(document,xpathstr));
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col1/field[contains(name,'Leaving fluid temp')]/value";
                    mproduct.put("cs_Evap_Leaving_fluid_temp", dj.getContentString(document,xpathstr));
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col1/field[contains(name,'Fluid')]/value";
                    mproduct.put("cs_Evap_Fluid", dj.getContentString(document,xpathstr));
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col1/field[contains(name,'Number of passes')]/value";
                    mproduct.put("cs_Evap_Number_of_passes", dj.getContentString(document,xpathstr));

                //cond  3
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col2/field[contains(name,'Entering fluid temp')]/value";
                    mproduct.put("cs_Cond_Entering_fluid_temp", dj.getContentString(document,xpathstr));
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col2/field[contains(name,'Fluid flow rate')]/value";
                    mproduct.put("cs_Cond_Fluid_flow_rate", dj.getContentString(document,xpathstr));
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col2/field[contains(name,'Fouling factor')]/value";
                    mproduct.put("cs_Cond_Fouling_factor", dj.getContentString(document,xpathstr));
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col2/field[contains(name,'Leaving fluid temp')]/value";
                    mproduct.put("cs_Cond_Leaving_fluid_temp", dj.getContentString(document,xpathstr));
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col2/field[contains(name,'Fluid')]/value";
                    mproduct.put("cs_Cond_Fluid", dj.getContentString(document,xpathstr));
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Evaporator_Condenser']/col2/field[contains(name,'Number of passes')]/value";
                    mproduct.put("cs_Cond_Number_of_passes", dj.getContentString(document,xpathstr));

                //4  Cooling Conditions of service
                //<name>Capacity (Tons)</name>
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Cooling Conditions of service']/col1/field[contains(name,'Capacity')]/value";
                    mproduct.put("cs_Capacity", dj.getContentString(document,xpathstr));
                //<name>Energy efficiency (kW/Ton)</name>
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Cooling Conditions of service']/col2/field[contains(name,'Energy efficiency')]/value";
                    mproduct.put("cs_Energy_efficiency", dj.getContentString(document,xpathstr));

                //5<name>Unit power supply</name>
                xpathstr="/report/job/product["+i+"]/performanceData/group[name='Electrical characteristics']/col1/field[contains(name,'Unit power supply')]/value";
                    mproduct.put("cs_Unit_power_supply", dj.getContentString(document,xpathstr));

                //6<name>Refrigerant</name>//<value>R134a</value>
                 xpathstr="/report/job/product["+i+"]/performanceData/group[name='Physical Specifications']/col2/field[contains(name,'Refrigerant')]/value";
                     mproduct.put("cs_Refrigerant", dj.getContentString(document,xpathstr));

                 //getContent(document,xpathstr);

                 pl.add(mproduct);
            }
        return pl;
    }

完结

本着共享的精神，减少别人重复弯路，减少重复别人的弯路