Java操作excel（POI）
由于在项目中使用了将excel数据导入到数据库。在这里分享一下。
这里使用的POI方式，支持两种格式（xls,xlsx）
package com.entity;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
/**
* excel公共方法
*/
public final class ExcelUtil {
private ExcelUtil() {
}
// 读取excel的结果集
private static ArrayList<Map<String, String>> result = null;
// 记录表格中空行的行数
private static int num = 0;
private static List<String> numList = new ArrayList<String>();
/**
* 获取需要传入数据库的数据
*/
public static void readExcelData(final String filePath) {
try {
readExcelToObj(filePath);
} catch (Exception e) {
System.out.println("导入失败");
}
}
/**
* 读取excel数据
*/
private static ArrayList<Map<String, String>> readExcelToObj(final String path) throws Exception {
Workbook wb = null;
result = new ArrayList<Map<String, String>>();
try {
wb = WorkbookFactory.create(new File(path));
Sheet sheet = wb.getSheetAt(0);
result = readExcel(wb, sheet, 0, 0);
} catch (InvalidFormatException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
/**
* 读取excel文件
* @param sheet sheet页下标：从0开始
* @param startReadLine 开始读取的行:从0开始
* @param tailLine 去除最后读取的行
*/
private static ArrayList<Map<String, String>> readExcel(final Workbook wb, final Sheet sheet, final int startReadLine, final int tailLine) {
Row row = null;
for (int i = startReadLine; i < sheet.getLastRowNum() - tailLine + 1; i++) {
row = sheet.getRow(i);
Map<String, String> map = new HashMap<String, String>();
for (Cell c : row) {
String returnStr = "";
boolean isMerge = isMergedRegion(sheet, i, c.getColumnIndex());
//判断是否具有合并单元格
if (isMerge) {
String rs = getMergedRegionValue(sheet, row.getRowNum(), c.getColumnIndex());
returnStr = rs;
} else {
returnStr = c.getRichStringCellValue().getString();
}
if (c.getColumnIndex() == 0) {
map.put("id", returnStr);
} else if (c.getColumnIndex() == 1) {
map.put("railwayTripsIn", returnStr);
} else if (c.getColumnIndex() == 2) {
map.put("arriveTime", returnStr);
} else if (c.getColumnIndex() == 3) {
map.put("railwayNum", returnStr);
} else if (c.getColumnIndex() == 4) {
map.put("checkTrack", returnStr);
} else if (c.getColumnIndex() == 5) {
map.put("maintenanceTask", returnStr);
} else if (c.getColumnIndex() == 6) {
map.put("maintenanceUnitName", returnStr);
} else if (c.getColumnIndex() == 7) {
map.put("project", returnStr);
} else if (c.getColumnIndex() == 8) {
map.put("startTime", returnStr);
} else if (c.getColumnIndex() == 9) {
map.put("finishTime", returnStr);
} else if (c.getColumnIndex() == 10) {
map.put("linkTrack", returnStr);
} else if (c.getColumnIndex() == 11) {
map.put("outboundTime", returnStr);
} else if (c.getColumnIndex() == 12) {
map.put("railwayTripsOut", returnStr);
}
}
result.add(map);
}
return result;
}
public static List<TrackData> splitCenterData(ArrayList<Map<String,String>> result) throws Exception {
trackListData = new ArrayList<TrackData>();
Map<String,String> map = new HashMap<String,String>();
Integer lineNumDataSize = result.size() - 5;
for (int i = 0; i < lineNumDataSize; i++) {
trackData = new TrackData();
map = result.get(i);
trackData.setId(map.get("id").trim());
trackData.setInTimes(map.get("inTimes").trim());
if(map.get("inTime").toString().trim().equals("\\")) {
trackData.setInTime(null);
} else {
trackData.setInTime(map.get("inTime"));
}
trackData.setCarGroud(map.get("carGroud").trim());
trackData.setCheckTrack(map.get("checkTrack").trim());
trackData.setJob(map.get("job").trim());
trackData.setNewsSource(map.get("newsSource").trim());
trackData.setProject(map.get("project").trim());
trackData.setStartTime(map.get("startTime").trim());
trackData.setEndTime(map.get("endTime").trim());
if(map.get("linkTrack").toString().trim().equals("\\")) {
trackData.setLinkTrack(null);
} else {
trackData.setLinkTrack(map.get("linkTrack").trim());
}
if(map.get("outTime").toString().trim().equals("\\")) {
trackData.setOutTime(null);
} else {
trackData.setOutTime(map.get("outTime").trim());
}
if(map.get("outTimes").toString().trim().equals("\\")) {
trackData.setOutTimes(null);
} else {
trackData.setOutTimes(map.get("outTimes").trim());
}
trackListData.add(trackData);
}
return trackListData;
}
/**
* 获取合并单元格的值
* @param sheet
* @param row
* @param column
*/
private static String getMergedRegionValue(final Sheet sheet, final int row, final int column) {
int sheetMergeCount = sheet.getNumMergedRegions();
for (int i = 0; i < sheetMergeCount; i++) {
CellRangeAddress ca = sheet.getMergedRegion(i);
int firstColumn = ca.getFirstColumn();
int lastColumn = ca.getLastColumn();
int firstRow = ca.getFirstRow();
int lastRow = ca.getLastRow();
if (row >= firstRow && row <= lastRow) {
if (column >= firstColumn && column <= lastColumn) {
Row fRow = sheet.getRow(firstRow);
Cell fCell = fRow.getCell(firstColumn);
return getCellValue(fCell);
}
}
}
return null;
}
/**
* 判断合并了行
* @param sheet
* @param row
* @param column
*/
private static boolean isMergedRow(final Sheet sheet, final int row, final int column) {
int sheetMergeCount = sheet.getNumMergedRegions();
for (int i = 0; i < sheetMergeCount; i++) {
CellRangeAddress range = sheet.getMergedRegion(i);
int firstColumn = range.getFirstColumn();
int lastColumn = range.getLastColumn();
int firstRow = range.getFirstRow();
int lastRow = range.getLastRow();
if (row == firstRow && row == lastRow) {
if (column >= firstColumn && column <= lastColumn) {
return true;
}
}
}
return false;
}
/**
* 判断指定的单元格是否是合并单元格
* @param sheet
* @param row 行下标
* @param column 列下标
*/
private static boolean isMergedRegion(final Sheet sheet, final int row, final int column) {
int sheetMergeCount = sheet.getNumMergedRegions();
for (int i = 0; i < sheetMergeCount; i++) {
CellRangeAddress range = sheet.getMergedRegion(i);
int firstColumn = range.getFirstColumn();
int lastColumn = range.getLastColumn();
int firstRow = range.getFirstRow();
int lastRow = range.getLastRow();
if (row >= firstRow && row <= lastRow) {
if (column >= firstColumn && column <= lastColumn) {
return true;
}
}
}
return false;
}
/**
* 判断sheet页中是否含有合并单元格
* @param sheet
*/
private static boolean hasMerged(final Sheet sheet) {
return sheet.getNumMergedRegions() > 0 ? true : false;
}
/**
* 合并单元格
* @param sheet
* @param firstRow 开始行
* @param lastRow 结束行
* @param firstCol 开始列
* @param lastCol 结束列
*/
private static void mergeRegion(final Sheet sheet, final int firstRow, final int lastRow, final int firstCol, final int lastCol) {
sheet.addMergedRegion(new CellRangeAddress(firstRow, lastRow, firstCol, lastCol));
}
/**
* 获取单元格的值
* @param cell
* @return
*/
private static String getCellValue(final Cell cell) {
if (cell == null) {
return "";
}
if (cell.getCellType() == Cell.CELL_TYPE_STRING) {
return cell.getStringCellValue();
} else if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
return String.valueOf(cell.getBooleanCellValue());
} else if (cell.getCellType() == Cell.CELL_TYPE_FORMULA) {
return cell.getCellFormula();
} else if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
return String.valueOf(cell.getNumericCellValue());
}
return "";
}
/**
* 判断行为空 lineNum 为空行的开始位置
*/
private static Integer checkRowNull(final Sheet sheet, final int rows) {
Row row = null;
for (int i = 0; i < rows; i++) {
int cols = sheet.getRow(i).getPhysicalNumberOfCells();
int col = 0;
row = sheet.getRow(i);
for (Cell c : row) {
String returnStr = "";
boolean isMerge = isMergedRegion(sheet, i, c.getColumnIndex());
// 判断是否具有合并单元格
if (isMerge) {
String rs = getMergedRegionValue(sheet, row.getRowNum(), c.getColumnIndex());
returnStr = rs;
} else {
returnStr = c.getRichStringCellValue().getString();
}
if (returnStr.trim() == null || returnStr.trim() == "") {
col++;
}
}
if (cols == col) {
num++;
}
}
return num;
}
/**
* 从excel读取内容
*/
private static void readContent(final String fileName) {
boolean isE2007 = false; //判断是否是excel2007格式
if (fileName.endsWith("xlsx")) {
isE2007 = true;
}
try {
InputStream input = new FileInputStream(fileName); //建立输入流
Workbook wb = null;
//根据文件格式(2003或者2007)来初始化
if (isE2007) {
wb = new XSSFWorkbook(input);
} else {
wb = new HSSFWorkbook(input);
}
Sheet sheet = wb.getSheetAt(0); //获得第一个表单
Iterator<Row> rows = sheet.rowIterator(); //获得第一个表单的迭代器
while (rows.hasNext()) {
Row row = rows.next(); //获得行数据
System.out.println("Row #" + row.getRowNum()); //获得行号从0开始
Iterator<Cell> cells = row.cellIterator(); //获得第一行的迭代器
while (cells.hasNext()) {
Cell cell = cells.next();
System.out.println("Cell #" + cell.getColumnIndex());
switch (cell.getCellType()) { //根据cell中的类型来输出数据
case HSSFCell.CELL_TYPE_NUMERIC:
System.out.println(cell.getNumericCellValue());
break;
case HSSFCell.CELL_TYPE_STRING:
System.out.println(cell.getStringCellValue());
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
System.out.println(cell.getBooleanCellValue());
break;
case HSSFCell.CELL_TYPE_FORMULA:
System.out.println(cell.getCellFormula());
break;
default:
System.out.println("unsuported sell type=======" + cell.getCellType());
break;
}
}
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
