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：
1 package ec.export.checksheet;
2
3 import java.io.File;
4 import java.io.IOException;
5 import java.io.InputStream;
6 import java.util.ArrayList;
7 import java.util.HashMap;
8 import java.util.List;
9 import java.util.Map;
10
11 import net.sf.jasperreports.engine.JREmptyDataSource;
12 import net.sf.jasperreports.engine.JRException;
13 import net.sf.jasperreports.engine.JRPrintPage;
14 import net.sf.jasperreports.engine.JasperFillManager;
15 import net.sf.jasperreports.engine.JasperPrint;
16 import net.sf.jasperreports.engine.JasperReport;
17 import net.sf.jasperreports.engine.util.JRLoader;
18 import net.sf.jasperreports.view.JasperViewer;
19
20 import org.dom4j.Document;
21 import org.dom4j.DocumentException;
22 import org.dom4j.io.SAXReader;
23
24 import ec.export.ECReportHelper;
25 import ec.utils.Dom4jXml;
26
27 public class AddCheckSheet {
28
29 public Dom4jXml dj = new Dom4jXml();
30
31 public JasperPrint FormTotalPage(JasperPrint jp,org.w3c.dom.Document document,Map mSelectCheckSheet){
32 List l=new ArrayList();
33 try {
34 l=CheckSheetReadXml(document);
35 } catch (Exception e1) {
36 // TODO Auto-generated catch block
37 e1.printStackTrace();
38 }
39
40 //jasper template put to this class dir path
41 String jasperpatha=getClass().getResource("")+"checksheeta.jasper";
42 jasperpatha=jasperpatha.replaceAll("file:/", "");
43 String jasperpathb=getClass().getResource("")+"checksheetb.jasper";
44 jasperpathb=jasperpathb.replaceAll("file:/", "");
45 for(int i=0;i<l.size();i++){
46
47 if(mSelectCheckSheet.containsKey(((Map)l.get(i)).get("cs_Model")))
48 {
49 // ========for checksheeta.jasper=======
50 JasperPrint jasperprint = new JasperPrint();
51 try {
52 jasperprint = JasperFillManager.fillReport(jasperpatha, (Map)l.get(i), new JREmptyDataSource());
53 } catch (Exception e) {
54 e.printStackTrace();
55 }
56 //System.out.println(" before jp: "+jp.getPages().size());
57 multipageLinking(jp,jasperprint);
58 //System.out.println(" after jp: "+jp.getPages().size());
59
60 // =======for checksheetb.jasper=======
61 jasperprint = new JasperPrint();
62 try {
63 jasperprint = JasperFillManager.fillReport(jasperpathb, (Map)l.get(i), new JREmptyDataSource());
64 } catch (Exception e) {
65 e.printStackTrace();
66 }
67 //System.out.println(" before jp: "+jp.getPages().size());
68 multipageLinking(jp,jasperprint);
69 //System.out.println(" after jp: "+jp.getPages().size());
70 }
71 }
72 return jp;
73 }
74
75 private JasperPrint multipageLinking(JasperPrint page1, JasperPrint page2) {
76 List pages = page2.getPages();
77 for (int count = 0; count <pages.size(); count++) {
78 page1.addPage((JRPrintPage) pages.get(count));
79 }
80 return page1;
81 }
82
83 public static void main(String[] args) throws Exception {
84 Dom4jXml dj = new Dom4jXml();
85 AddCheckSheet acs=new AddCheckSheet();
86 SAXReader saxReader = new SAXReader();
87 Document document;
88 try {
89 document = saxReader.read(new File("D:/Task/draw_cs3/20141218/wcfx36_more.xml"));
90 JasperPrint jp=null;
91 // acs.CheckSheetReadXml(dj.parse(document));
92 Map mSelectCheckSheet=new HashMap();
93 jp=acs.FormTotalPage(jp,dj.parse(document),mSelectCheckSheet);
94 JasperViewer.viewReport(jp,false);
95 } catch (DocumentException e) {
96 // TODO Auto-generated catch block
97 e.printStackTrace();
98 }
99 }
100 }
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
时间： 2024-10-10 21:39:30