导出数据 超出的单元格样式的最大数量。您可以定义多达4000风格
The maximum number of cell styles was exceeded. You can define up to 4000 styles
就会报以下的错误,是由于cell styles太多create造成,故一般可以把cellstyle设置放到循环外面
报错如下:
Caused by: java.lang.IllegalStateException: The maximum number of cell styles was exceeded. You can define up to 4000 styles in a .xls workbook
at org.apache.poi.hssf.usermodel.HSSFWorkbook.createCellStyle(HSSFWorkbook.java:1144)
at org.apache.poi.hssf.usermodel.HSSFWorkbook.createCellStyle(HSSFWorkbook.java:88)
at com.trendmicro.util.toExcel.ExcelExporter.addWorkbook(ExcelExporter.java:612)
at com.trendmicro.util.toExcel.ExcelExporter.exportToExcel(ExcelExporter.java:112)
at com.trendmicro.util.toExcel.ReportExporter.exportAutomationReport(ReportExporter.java:190)
at com.trendmicro.view.reports.TestCaseAutomationBean.exportAutoReport(TestCaseAutomationBean.java:856)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.el.parser.AstValue.invoke(AstValue.java:191)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
at org.apache.jasper.el.JspMethodExpression.invoke(JspMethodExpression.java:68)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
... 33 more
-------------示例--------------
错误示例
改正后正确代码
- CellStyle style = workbook.createCellStyle();
- Font font = workbook.createFont();
- font.setBoldweight(Font.BOLDWEIGHT_BOLD);
- style.setFont(font);
- for (int i = 0; i < 10000; i++) {
- Row row = sheet.createRow(i);
- Cell cell = row.createCell((short) 0);
- cell.setCellStyle(style);
- }
以上方法原地址:http://blog.csdn.net/hoking_in/article/details/7919530
方法二(不推荐,影响性能):
1.4000最大样式错误
java.lang.IllegalStateException: The maximum number of cell styles was exceeded. You can define up to 4000 styles in a .xls workbook错误
找到zpoi.jar中org.zkoss.poi.hssf.usermodel.HSSFWorkbook修改createCellStyle函数内的最大样式数量即可。重新打zpoi.jar即可。
- public HSSFCellStyle createCellStyle()
- {
- if(workbook.getNumExFormats() == MAX_STYLES) {
- throw new IllegalStateException("The maximum number of cell styles was exceeded. " +
- "You can define up to 4000 styles in a .xls workbook");
- }
- ExtendedFormatRecord xfr = workbook.createCellXF();
- short index = (short) (getNumCellStyles() - 1);
- HSSFCellStyle style = new HSSFCellStyle(index, xfr, this);
- workbook.createCellXFExt(index);
- return style;
- }
IE兼容问题
数字形式写入代码
- public static Cell writeNumericValue(Sheet sheet, int row, int column,
- Double value) {
- Row poiRow = sheet.getRow(row);
- if (poiRow == null) {
- poiRow = sheet.createRow(row);
- }
- Cell poiCell = poiRow.getCell(column);
- if (poiCell != null) {
- poiRow.removeCell(poiCell);
- }
- poiCell = poiRow.createCell(column);
- poiCell.setCellType(Cell.CELL_TYPE_NUMERIC);
- poiCell.setCellValue(value);
- return poiCell;
- }
写入日期代码
- public static Cell writeDateValue(Workbook book, Sheet sheet, int row,
- int column, Date value) {
- Row poiRow = sheet.getRow(row);
- CreationHelper createHelper = book.getCreationHelper();
- if (poiRow == null) {
- poiRow = sheet.createRow(row);
- }
- Cell poiCell = poiRow.getCell(column);
- if (poiCell == null) {
- poiCell = poiRow.createCell(column);
- }
- CellStyle cellStyle = book.createCellStyle();
- cellStyle.setDataFormat(createHelper.createDataFormat().getFormat(
- "yyyy-mm-dd"));
- if (value != null) {
- poiCell.setCellValue(value);
- } else {
- poiCell.setCellValue(new Date());
- }
- poiCell.setCellStyle(cellStyle);
- return poiCell;
- }
以上方法原地址:http://realgodo.iteye.com/blog/1105529