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：
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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;
}
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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);
}
}
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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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原文链接：http://zmx.iteye.com/blog/622546