An example of dynamic column printing using jasperReport in Java

This article mainly introduces the relevant information about the implementation code of jasperReport in Java to implement dynamic column printing. I hope that everyone can master this part of the content through this article. Friends in need can refer to

Java The implementation code of jasperReport to implement dynamic column printing

The comments in the following code are very clear. I hope it can help everyone. Please refer to it.

Sample code:

public ActionResult projectPrint() { 
  String[] printValue = null; 
  // 从页面中获得要查询的字段 
  String reqPrintValue = getRequest().getParameter("printValue"); 
  // 没有选择则默认全打印 
  if (null == reqPrintValue || StringUtils.isEmpty(reqPrintValue)) { 
   printValue = new String[] { "pnumber", "pname", "pdepart", "pdecision", "pthrow", "plastmonth", "pfund", "ploan" }; 
  } else { 
   printValue = reqPrintValue.split(","); 
  } 
  // 查询统计数据 
  List<Object[]> projectList = getEntityManager().queryPrintProjectInfo(printValue); 
 
  // 将数据转换为Map对象，换化成Map对象 
  List<Map> reportDataList = new ArrayList<Map>(); 
 
  for (int i = 0; i < projectList.size(); i++) { 
   Object[] personStr = projectList.get(i); 
   Map reportData = new HashMap(); 
   for (int j = 0; j < personStr.length; j++) { 
    reportData.put("field_" + j, String.valueOf(personStr[j])); 
   } 
   reportDataList.add(reportData); 
  } 
 
  int columCount = 0;// 数据列 
  int fieldCount = 0;// 字段列数（因为pname比较长所以想让pname比其它的列长些，故设计这个变量） 
  int pnameCount = -1;// 记录下pname的序号 
  for (int i = 0; i < printValue.length; i++) { 
   // pthrow下面有两列 
   if ("pthrow".equals(printValue[i])) { 
    columCount = columCount + 2; 
    fieldCount = fieldCount + 2; 
    // ploan下面也有两列 
   } else if ("ploan".equals(printValue[i])) { 
    columCount = columCount + 2; 
    fieldCount = fieldCount + 2; 
    // 故意让pname也占两列 
   } else if ("pname".equals(printValue[i])) { 
    pnameCount = i;// 记录下pname的序号 
    columCount = columCount + 1; 
    fieldCount = fieldCount + 2; 
   } else { 
    // 其它的列都占一个单位 
    columCount = columCount + 1; 
    fieldCount = fieldCount + 1; 
   } 
  } 
 
  InputStream is = null; 
  try { 
   // 从资源文件中读取报表 
   is = this.getClass().getResourceAsStream("/reports/project.jrxml"); 
   JasperDesign jasperDesign = (JasperDesign) JRXmlLoader.load(is); 
 
   Map styleMap = jasperDesign.getStylesMap(); 
   // column header 对应的样式 
   JRDesignStyle theaderStyle = (JRDesignStyle) styleMap.get("theader"); 
   // column detail 对应的样式 
   JRDesignStyle tbodyStyle = (JRDesignStyle) styleMap.get("tboby"); 
   // pagefoot 对应的样式 
   JRDesignStyle tfootStyle = (JRDesignStyle) styleMap.get("tfoot"); 
 
   int _START_X_ = 20;// x轴的起始位置 
   int startX = _START_X_; // x轴的起始位置 
   // 单列的宽度 
   // 535是jasepreReport报表column最大的宽度 
   int columnWidth = 535 / fieldCount; 
   // 20,24,15是报表中已设置的，一定与之相同 
   final int columnHeadBandHeight = 20; 
   final int detailHeight = 24; 
   final int pagefootHeight = 15; 
 
   // 设置报表字段 
   for (int idx = 0; idx < columCount; idx++) { 
    JRDesignField field = new JRDesignField(); 
    field.setName("field_" + idx); 
    field.setValueClass(java.lang.String.class); 
    jasperDesign.addField(field); 
   } 
 
   JRDesignBand columnHeadBand = (JRDesignBand) jasperDesign.getColumnHeader(); 
   // 绘制表头 
   for (int idx = 0; idx < printValue.length; idx++) { 
    if ("pnumber".equals(printValue[idx])) { 
     JRDesignStaticText staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     staticText.setWidth(columnWidth); 
     staticText.setY(0); 
     staticText.setX(startX); 
     staticText.setHeight(2 * columnHeadBandHeight); 
     staticText.setText("序号"); 
     columnHeadBand.addElement(staticText); 
     startX += columnWidth; 
    } else if ("pname".equals(printValue[idx])) { 
     JRDesignStaticText staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     // 项目名称的宽度是其它的宽度的2倍 
     staticText.setWidth(columnWidth * 2); 
     staticText.setY(0); 
     staticText.setX(startX); 
     staticText.setHeight(2 * columnHeadBandHeight); 
     staticText.setText("项目名称"); 
     columnHeadBand.addElement(staticText); 
     startX += columnWidth * 2; 
    } else if ("pdepart".equals(printValue[idx])) { 
     JRDesignStaticText staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     staticText.setWidth(columnWidth); 
     staticText.setY(0); 
     staticText.setX(startX); 
     staticText.setHeight(2 * columnHeadBandHeight); 
     staticText.setText("部门"); 
     columnHeadBand.addElement(staticText); 
     startX += columnWidth; 
    } else if ("pdecision".equals(printValue[idx])) { 
     JRDesignStaticText staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     staticText.setWidth(columnWidth); 
     staticText.setY(0); 
     staticText.setX(startX); 
     staticText.setHeight(2 * columnHeadBandHeight); 
     staticText.setText("已决策"); 
     columnHeadBand.addElement(staticText); 
     startX += columnWidth; 
    } else if ("pthrow".equals(printValue[idx])) { 
     // 投审会下面有两列 
     JRDesignStaticText staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     staticText.setWidth(columnWidth * 2); 
     staticText.setY(0); 
     staticText.setX(startX); 
     staticText.setHeight(columnHeadBandHeight); 
     staticText.setText("投审会"); 
     columnHeadBand.addElement(staticText); 
 
     staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     columnHeadBand.addElement(staticText); 
     staticText.setWidth(columnWidth); 
     staticText.setY(columnHeadBandHeight); 
     staticText.setX(startX); 
     staticText.setHeight(columnHeadBandHeight); 
     staticText.setText("12月初"); 
 
     staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     columnHeadBand.addElement(staticText); 
     staticText.setWidth(columnWidth); 
     staticText.setY(columnHeadBandHeight); 
     staticText.setX(startX + columnWidth); 
     staticText.setHeight(columnHeadBandHeight); 
     staticText.setText("12月中"); 
     columnHeadBand.addElement(staticText); 
     startX += 2 * columnWidth; 
    } else if ("plastmonth".equals(printValue[idx])) { 
     // 投决会下面有一列 
     JRDesignStaticText staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     staticText.setWidth(columnWidth); 
     staticText.setY(0); 
     staticText.setX(startX); 
     staticText.setHeight(columnHeadBandHeight); 
     staticText.setText("投决会"); 
     columnHeadBand.addElement(staticText); 
 
     staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     columnHeadBand.addElement(staticText); 
     staticText.setWidth(columnWidth); 
     staticText.setY(columnHeadBandHeight); 
     staticText.setX(startX); 
     staticText.setHeight(columnHeadBandHeight); 
     staticText.setText("12月下"); 
     columnHeadBand.addElement(staticText); 
     startX += columnWidth; 
    } else if ("pfund".equals(printValue[idx])) { 
     JRDesignStaticText staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     staticText.setWidth(columnWidth); 
     staticText.setY(0); 
     staticText.setX(startX); 
     staticText.setHeight(2 * columnHeadBandHeight); 
     staticText.setText("基金投资额"); 
     columnHeadBand.addElement(staticText); 
     startX += columnWidth; 
    } else if ("ploan".equals(printValue[idx])) { 
     // 投贷协同额下面有两列 
     JRDesignStaticText staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     staticText.setWidth(columnWidth * 2); 
     staticText.setY(0); 
     staticText.setX(startX); 
     staticText.setHeight(columnHeadBandHeight); 
     staticText.setText("投贷协同额"); 
     columnHeadBand.addElement(staticText); 
 
     staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     columnHeadBand.addElement(staticText); 
     staticText.setWidth(columnWidth); 
     staticText.setY(columnHeadBandHeight); 
     staticText.setX(startX); 
     staticText.setHeight(columnHeadBandHeight); 
     staticText.setText("金额"); 
 
     staticText = new JRDesignStaticText(); 
     staticText.setStyle(theaderStyle); 
     columnHeadBand.addElement(staticText); 
     staticText.setWidth(columnWidth); 
     staticText.setY(columnHeadBandHeight); 
     staticText.setX(startX + columnWidth); 
     staticText.setHeight(columnHeadBandHeight); 
     staticText.setText("入库情况"); 
     columnHeadBand.addElement(staticText); 
     startX += 2 * columnWidth; 
    } 
   } 
 
   // 绘制Detail部门 
   startX = _START_X_; 
   JRDesignBand columnDetailBand = (JRDesignBand) jasperDesign.getDetail(); 
   for (int idx = 0; idx < columCount; idx++) { 
    JRDesignTextField textField = new JRDesignTextField(); 
    textField.setStretchWithOverflow(true); 
    textField.setX(startX); 
    textField.setY(0); 
    if (pnameCount == idx) { 
     textField.setWidth(2 * columnWidth); 
     startX += 2 * columnWidth; 
    } else { 
     textField.setWidth(columnWidth); 
     startX += columnWidth; 
    } 
    textField.setHeight(detailHeight); 
    textField.setPositionType(JRElement.POSITION_TYPE_FLOAT); 
    textField.setStyle(tbodyStyle); 
    textField.setBlankWhenNull(true); 
    JRDesignExpression expression = new JRDesignExpression(); 
    expression.setValueClass(java.lang.String.class); 
    expression.setText("$F{field_" + idx + "}"); 
    textField.setExpression(expression); 
    columnDetailBand.addElement(textField); 
   } 
 
   JRDesignBand pageFootBand = (JRDesignBand) jasperDesign.getPageFooter(); 
   // 合计数据，本应统计的 
   List<Object[]> pageCountList = new ArrayList<Object[]>(); 
   Object[] obj = new String[] { "合计", "15299", "", "", "67121", "92420", "155877", }; 
   pageCountList.add(obj); 
   obj = new String[] { "", "", "", "XXX小计", "", "24473", "16470", }; 
   pageCountList.add(obj); 
   obj = new String[] { "", "", "", "WWW小计", "", "7289", "1674", }; 
   pageCountList.add(obj); 
   obj = new String[] { "", "", "", "ZZZ小计", "", "32700", "13000", }; 
   pageCountList.add(obj); 
   obj = new String[] { "", "", "", "YYY小计", "", "12733", "120733", }; 
   pageCountList.add(obj); 
   obj = new String[] { "", "", "", "AAA小计", "", "2225", "120733", }; 
   pageCountList.add(obj); 
   obj = new String[] { "", "", "", "BBB小计", "", "3000", "0", }; 
   pageCountList.add(obj); 
   int footWidth = 535 / 7; 
   for (int p = 0; p < pageCountList.size(); p++) { 
    for (int k = 0; k < 7; k++) { 
     Object[] ob = pageCountList.get(p); 
     JRDesignStaticText staticText = new JRDesignStaticText(); 
     staticText.setStyle(tfootStyle); 
     staticText.setWidth(footWidth); 
     staticText.setY(pagefootHeight * p); 
     staticText.setX(k * footWidth + _START_X_); 
     staticText.setHeight(pagefootHeight); 
     staticText.setText(String.valueOf(ob[k])); 
     pageFootBand.addElement(staticText); 
    } 
   } 
 
   // 编译报表 
   JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign); 
   String type = this.getRequest().getParameter("type");//pdf格式 
   JasperUtils.prepareReport(jasperReport, type); 
   // 报表数据源 
   JRDataSource dataSource = new JRBeanCollectionDataSource(reportDataList); 
   JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, null, dataSource); 
   HttpServletResponse response = this.getResponse(); 
   JasperUtils.export(jasperPrint, response, getRequest(), type); 
  } catch (Exception e) { 
   e.printStackTrace(); 
  } 
 
  return null; 
 }

public static void export(JasperPrint jasperPrint, HttpServletResponse response, HttpServletRequest request, 
   String type) throws IOException { 
  if (EXCEL_TYPE.equals(type)) { 
   exportExcel(jasperPrint, response, request); 
  } else if (PDF_TYPE.equals(type)) { 
   exportPDF(jasperPrint, response, request); 
  } else if (HTML_TYPE.equals(type)) { 
   exportHTML(jasperPrint, response, request); 
  } else { 
   exportPrint(jasperPrint, response, request); 
  } 
 
 }

public static void exportExcel(JasperPrint jasperPrint, HttpServletResponse response, HttpServletRequest request) 
   throws IOException { 
  response.setContentType("application/vnd.ms-excel"); 
  String filename = DownloadHelper.encodeFilename("未命名.xls", request); 
  response.setHeader("Content-disposition", "attachment;filename=" + filename); 
  ServletOutputStream ouputStream = response.getOutputStream(); 
  JRXlsExporter exporter = new JRXlsExporter(); 
  exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint); 
  exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, ouputStream); 
  exporter.setParameter(JRXlsExporterParameter.IS_REMOVE_EMPTY_SPACE_BETWEEN_ROWS, Boolean.TRUE); 
  exporter.setParameter(JRXlsExporterParameter.IS_ONE_PAGE_PER_SHEET, Boolean.FALSE); 
  exporter.setParameter(JRXlsExporterParameter.IS_WHITE_PAGE_BACKGROUND, Boolean.FALSE); 
  try { 
   exporter.exportReport(); 
  } catch (JRException e) { 
   e.printStackTrace(); 
  } 
  ouputStream.flush(); 
  ouputStream.close(); 
 } 
 
 public static void exportPDF(JasperPrint jasperPrint, HttpServletResponse response, HttpServletRequest request) 
   throws IOException { 
  response.setContentType("application/pdf"); 
  String filename = DownloadHelper.encodeFilename("未命名.pdf", request); 
  response.setHeader("Content-disposition", "attachment;filename=" + filename); 
  ServletOutputStream ouputStream = response.getOutputStream(); 
  try { 
   JasperExportManager.exportReportToPdfStream(jasperPrint, ouputStream); 
  } catch (JRException e) { 
   e.printStackTrace(); 
  } 
  ouputStream.flush(); 
  ouputStream.close(); 
 }

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