Java 中jasperReport实现动态列打印的实现代码

以下代码中注释说明很清楚，希望能帮助到大家，大家参考下。

示例代码：

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[] { "", "", "", "pileReport(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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