Java の jasperReport によって実装された動的列印刷の例

この記事では、動的列印刷を実装するための Java での jasperReport の実装コードに関する関連情報を主に紹介します。この記事を通じて、この部分の内容をマスターできることを願っています。

実装コード。 Java で jasperReport を使用して動的列印刷を実装します

次のコードのコメントが非常にわかりやすいので、ぜひ参考にしてください。

サンプルコード:

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();
 }

以上がJava の jasperReport によって実装された動的列印刷の例の詳細内容です。詳細については、PHP 中国語 Web サイトの他の関連記事を参照してください。