如何利用API导出带有页眉页脚的excel

在报表中设置的页眉页脚在页面中是看不到的,如下图:

页面中的效果:

在打印的时候,可以看到页眉页脚的效果:

那么,如果将页眉页脚导入到导出的excel中呢.我们可以通过API来进行设置:

<%@ pageimport="com.runqian.report4.model.*"%>
<%@ page import="com.runqian.report4.usermodel.*"%>
<%@ page import="com.runqian.report4.view.excel.*" %>
<%@ page import="com.runqian.report4.util.*" %>
<jsp:directive.pageimport="org.apache.poi2.hssf.usermodel.HSSFWorkbook"/>
<jsp:directive.pageimport="org.apache.poi2.hssf.usermodel.HSSFSheet"/>
<jsp:directive.page import="org.apache.poi2.hssf.usermodel.HSSFHeader"/>
<jsp:directive.pageimport="org.apache.poi2.hssf.usermodel.HSSFFooter"/>

<%
//设置所有report对象的值为GBK转码
request.setCharacterEncoding("GBK");

String reportFile = request.getParameter("report");
if( reportFile==null ){
  reportFile = "report_4.raq";
}

//第一步，读取报表模板
InputStreamfis=application.getResourceAsStream("/reportFiles/"+reportFile);
ReportDefine rd = (ReportDefine)ReportUtils.read( fis );

//第二步，设置报表授权文件，运算报表
Context context = new Context();
//计算前，设置参数与宏
ParamMetaData pmd = rd.getParamMetaData();
String paramOrMocrName = "";
if(pmd != null){
  for(int i = 0;i <pmd.getParamCount(); i ++){
   paramOrMocrName = pmd.getParam(i).getParamName();
   context.setParamValue(paramOrMocrName,request.getParameter(paramOrMocrName));
  }
}
MacroMetaData mmd = rd.getMacroMetaData();
if( mmd != null ){
  for(int i = 0; i < mmd.getMacroCount(); i ++){
   paramOrMocrName = mmd.getMacro(i).getMacroName();
   context.setMacroValue(paramOrMocrName,request.getParameter(paramOrMocrName));
  }
}

Engine enging = new Engine( rd, context);
IReport iReport = enging.calc();

//生成Excel文件,因为jsp里不能直接用response的out.print()方法，所以我们先在服务器上生成这个文件
   StringsaveFile=request.getRealPath("/reportFiles/")+"/"+reportFile+".xls";

   ExcelReport eReoprt = new ExcelReport();
   eReoprt.export(iReport);

   FileOutputStream fos = new FileOutputStream( saveFile );
    eReoprt.saveTo(fos);
   fos.close();

   HSSFWorkbook wb = new HSSFWorkbook(new FileInputStream(saveFile));
   wb.setSheetName(0,"表1");
   HSSFSheet s=wb.getSheetAt(0);
   HSSFHeader hss = s.getHeader();
   //hss.setCenter("aaaa");
   StringBuffer stringBuffer = new StringBuffer();
StringBuffer sb = new StringBuffer();
   int rowNum = iReport.getRowCount();
   int colNum = iReport.getColCount();
   sb.append("行数："+rowNum+";列数："+colNum);

   //页眉页脚分3部分（左中右），
   int centerStartCol =colNum/3+1;      //中间部分开始列
   int rightStartCol = colNum/3*2+colNum%3+1;   //右边部分开始列
   sb.append(";中间开始部分："+centerStartCol+";右边开始部分："+rightStartCol);
//页眉左边部分

    for(int i=1,j=rowNum;i<=j;i++){
      IRowCell iRowCell=iReport.getRowCell(i);
  if( iRowCell.getRowType()==iRowCell.TYPE_PAGE_HEADER ){

      if(iRowCell.getRowVisible()!=false ){
       for(int m=1,n=centerStartCol;m<=n;m++){

        INormalCell cell =iReport.getCell(i,(short)m);
        sb.append(";左边部分："+cell.isMerged());

        Object obj=cell.getValue();
        if(obj!=null){
        stringBuffer.append(obj.toString());
        HSSFHeader hh=s.getHeader();
        hh.setLeft(stringBuffer.toString());
       }
       }
       stringBuffer.append("\r");
      }
   }
  }

  stringBuffer.delete(0,stringBuffer.length());
  //页眉中间部分
  System.out.println(sb.toString());

    for(int i=1,j=rowNum;i<=j;i++){
      IRowCell iRowCell=iReport.getRowCell(i);
  if( iRowCell.getRowType()==iRowCell.TYPE_PAGE_HEADER ){
   if(iRowCell.getRowVisible()!=false ){
    for(intm=rightStartCol,n=rightStartCol;m<=n;m++){

     INormalCell cell = iReport.getCell(i,(short)m);
     sb.append(";中间部分："+cell.isMerged());

     Object obj=cell.getValue();
     if(obj!=null){
      stringBuffer.append(obj.toString());
       HSSFHeader hh=s.getHeader();
       hh.setCenter(stringBuffer.toString());
      }
    }
    stringBuffer.append("\r");
   }
  }
}

  stringBuffer.delete(0,stringBuffer.length());
  System.out.println(sb.toString());
  //页眉右边部分

    for(int i=1,j=rowNum;i<=j;i++){
      IRowCell iRowCell=iReport.getRowCell(i);
  if( iRowCell.getRowType()==iRowCell.TYPE_PAGE_HEADER ){
   if(iRowCell.getRowVisible()!=false ){
    for(int m=centerStartCol,n=colNum;m<=n;m++){
     INormalCell cell =iReport.getCell(i,(short)m);
     sb.append(";右边部分："+cell.isMerged());

     Object obj=cell.getValue();
     if(obj!=null){
      stringBuffer.append(obj.toString());
       HSSFHeader hh=s.getHeader();
       hh.setCenter(stringBuffer.toString());
      }
    }
    stringBuffer.append("\r");
   }
  }
}
   for(int i=1,j=iReport.getColCount();i<=j;i++){
     IColCell irc=iReport.getColCell((short)i);

     if(irc.getBreakPage()){
     s.setColumnBreak((short)(i-1));
     }
   }
   //结束分页
   //页眉开始

   HSSFHeader hh=s.getHeader();
   System.out.println("日期&D:"+HSSFHeader.date());
   System.out.println("当前页&P:"+HSSFHeader.page());
   System.out.println("页数&N:"+HSSFHeader.numPages());
   System.out.println("时间&T:"+HSSFHeader.time());
   System.out.println("日期&D:"+HSSFHeader.date());

   //页眉结束
   //设置页脚
   HSSFFooter footer = s.getFooter();
   footer.setCenter( "第 " + HSSFFooter.page() +"    共 " + HSSFFooter.numPages());
   //页脚结束
   //标题行

   System.out.println("========="+stringBuffer);
   System.out.println("第一行第五列："+iReport.getCell(1,(short)5).getValue().toString());
//转跳到我们刚才生成的文件
wb.write(new FileOutputStream(saveFile));
System.out.println("Excel文件生成结束,文件保存在:"+saveFile);
response.sendRedirect(request.getContextPath()+"/reportFiles/"+reportFile+".xls");
for(int i=1;i<=iReport.getColCount();i++){
  System.out.println(iReport.getCell(1,(short)i).getValue());
}
%>

如何利用API导出带有页眉页脚的excel

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