【发布时间】：2019-11-07 16:07:28
【问题描述】：
我的要求是将excel表作为超级数据集读取，并根据开始和结束文本显示其中的一部分作为某一列中的值。我能够遍历整个工作表，但无法跟踪我可以在以后迭代以迭代部分工作表的行号。
下面是我的 JSP 代码
<%@page import="org.apache.poi.ss.util.CellReference"%>
<%@page import="java.util.regex.Matcher"%>
<%@page import="java.util.regex.Pattern"%>
<%@page import="org.apache.poi.xssf.usermodel.XSSFCell"%>
<%@page import="java.text.SimpleDateFormat"%>
<%@page import="org.apache.poi.ss.usermodel.DateUtil"%>
<%@page import="org.apache.poi.ss.usermodel.CellType"%>
<%@page import="org.apache.poi.ss.usermodel.Cell"%>
<%@page import="org.apache.poi.ss.usermodel.Row"%>
<%@page import="org.apache.poi.ss.usermodel.Sheet"%>
<%@page import="org.apache.poi.xssf.usermodel.XSSFWorkbook"%>
<%@page import="org.apache.poi.ss.usermodel.Workbook"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<%@page import="java.io.*"%>
<%@page import="java.util.*"%>
<%@page import="org.apache.poi.hssf.usermodel.HSSFSheet"%>
<%@page import="org.apache.poi.hssf.usermodel.HSSFWorkbook"%>
<%@page import="org.apache.poi.hssf.usermodel.HSSFRow"%>
<%@page import="org.apache.poi.hssf.usermodel.HSSFCell"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<table border="4">
<%
short a = 0;
short b = 1;
short c = 2;
short d = 3;
short ee = 4;
short f = 5;
short g = 6;
short h = 7;
short l = 8;
short m = 9;
int i = 0;
List<Integer> rowCountList = new ArrayList<Integer>();
String value1 = "", value2 = "", value3 = " ", value4 = "", value5 = "", value6 = "", value7 = "", value8 = "", value9 = "", value10 = "";
String filename = "Temp.xlsx";
if (filename != null && !filename.equals(
"")) {
try {
FileInputStream fs = new FileInputStream(new File(filename));
Workbook wb = new XSSFWorkbook(fs);
for (int k = 0; k < wb.getNumberOfSheets(); k++) {
int j = i + 1;
Sheet sheet = wb.getSheetAt(k);
int rows = sheet.getPhysicalNumberOfRows();
System.out.println("Rows:" + rows);
for (int r = 0; r < rows; r++) {
value1 = "";
value2 = "";
value3 = " ";
value4 = "";
value5 = "";
value6 = "";
value7 = "";
value8 = "";
value9 = "";
value10 = "";
System.out.println("row no:" + r);
Row row = sheet.getRow(r);
// int cells = row.getPhysicalNumberOfCells();
// System.out.println(cells);
out.write("<br>");
Cell cell1 = row.getCell(a, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
if (cell1.getCellType() != CellType.BLANK) {
switch (cell1.getCellType()) {
case STRING:
value1 = cell1.getStringCellValue();
break;
case NUMERIC:
value1 = " " + cell1.getNumericCellValue();
break;
}
}
Cell cell2 = row.getCell(b, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
if (cell2.getCellType() != CellType.BLANK) {
switch (cell2.getCellType()) {
case STRING:
value2 = cell2.getStringCellValue();
break;
case NUMERIC:
if (DateUtil.isCellDateFormatted(cell2)) {
SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
value2 = "" + dateFormat.format(cell2.getDateCellValue());
} else {
value2 = " " + cell2.getNumericCellValue();
}
break;
}
}
Cell cell3 = row.getCell(c, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
switch (cell3.getCellType()) {
case STRING:
value3 = cell3.getStringCellValue();
break;
case NUMERIC:
value3 = " " + cell3.getNumericCellValue();
break;
}
Cell cell4 = row.getCell(d, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
switch (cell4.getCellType()) {
case STRING:
value4 = cell4.getStringCellValue();
break;
case NUMERIC:
value4 = " " + cell4.getNumericCellValue();
break;
}
Cell cell5 = row.getCell(ee, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
switch (cell5.getCellType()) {
case STRING:
value5 = cell5.getStringCellValue();
break;
case NUMERIC:
value5 = " " + cell5.getNumericCellValue();
break;
}
Cell cell6 = row.getCell(f, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
switch (cell6.getCellType()) {
case STRING:
value6 = cell6.getStringCellValue();
break;
case NUMERIC:
value6 = " " + cell6.getNumericCellValue();
break;
}
Cell cell7 = row.getCell(g, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
switch (cell7.getCellType()) {
case STRING:
value7 = cell7.getRichStringCellValue().getString();
break;
case NUMERIC:
value7 = " " + cell7.getNumericCellValue();
break;
}
Cell cell8 = row.getCell(h, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
// if (cell8.getCellType() != CellType.BLANK) {
switch (cell8.getCellType()) {
case STRING:
value8 = cell8.getRichStringCellValue().getString();
**if (value8.equalsIgnoreCase("Execution Start")) {
System.out.println(row.getRowNum());
for (int x = row.getRowNum(); x < sheet.getLastRowNum(); x++) {
Row rowx = sheet.getRow(x);
Cell cellx = rowx.getCell(h, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
if (!cellx.getRichStringCellValue().getString().equalsIgnoreCase("Execution End")) {
rowCountList.add(x);**
}
}
}
// System.out.println(value8);
break;
case NUMERIC:
value8 = " " + cell8.getNumericCellValue();
break;
}
Cell cell9 = row.getCell(l, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
switch (cell9.getCellType()) {
case STRING:
value9 = cell9.getRichStringCellValue().getString();
break;
case NUMERIC:
value9 = " " + cell9.getNumericCellValue();
break;
}
Cell cell10 = row.getCell(m, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK);
switch (cell10.getCellType()) {
case STRING:
value10 = cell10.getRichStringCellValue().getString();
break;
case NUMERIC:
value10 = " " + cell10.getNumericCellValue();
break;
}
%>
<tr><td><%=value1%></td><td><%=value2%></td><td><%=value3%></td><td><%=value4%></td><td><%=value5%></td><td><%=value6%></td><td><%=value7%></td>
<td><%=value8%></td><td><%=value9%></td><td><%=value10%></td></tr>
<%
i++;
}
System.out.println(rowCountList);
}
} catch (Exception e) {
System.out.println(e);
}
}
%>
</table>
</body>
</html>
value8 基础我需要提取某些行并显示，我无法跟踪行号，因为我在 Cell cellx = rowx.getCell(h, Row.MissingCellPolicy.CREATE_NULL_AS_BLANK); 行上获得了 NPE；
请指教
【问题讨论】：
标签： apache-poi