jasperReport实现动态列打印

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();
  }