话不多说，请看代码：
ExcelUtil.java
package pers.kangxu.datautils.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
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.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.CellValue;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.Formulaevaluator;
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.util.CellRangeAddress;
public class ExcelUtil {
public static void writeExcel(String filePath,String sheetName,
int sheetIndex,
String[] fileHeader,
List datas){
// 创建工作簿
Workbook wb = new HSSFWorkbook();
// 创建工作表 sheet
Sheet s = wb.createSheet();
wb.setSheetName(sheetIndex, sheetName);
Row r = s.createRow(0);
Cell c = null;
Font font = null;
CellStyle styleHeader = null;
CellStyle styleContent = null;
//粗体
font = wb.createFont();
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 设置头样式
styleHeader = wb.createCellStyle();
styleHeader.setFont(font);
styleHeader.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
styleHeader.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框
styleHeader.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框
styleHeader.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
// 设置内容样式
styleContent = wb.createCellStyle();
styleContent.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
styleContent.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框
styleContent.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框
styleContent.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
//设置头
for(int i=0;i> readExcel(String filePath,int sheetIndex){
List> mapList = new ArrayList>();
// 头
List list = new ArrayList();
//
int cnt = 0;
int idx = 0;
try {
InputStream input = new FileInputStream(filePath); //建立输入流
Workbook wb = null;
wb = new HSSFWorkbook(input);
// 获取sheet页
Sheet sheet = wb.getSheetAt(sheetIndex);
Iterator rows = sheet.rowIterator();
while (rows.hasNext()) {
Row row = rows.next();
Iterator cells = row.cellIterator();
Map map = new HashMap();
if(cnt == 0){ // 将头放进list中
while (cells.hasNext()) {
Cell cell = cells.next();
if(isContainMergeCell(sheet)){
cancelMergeCell(sheet);
}
list.add(getStringCellValue(cell));
}
cnt ++;
continue;
}else {
while (cells.hasNext()) {
Cell cell = cells.next();
if(isContainMergeCell(sheet)){
cancelMergeCell(sheet);
}
// 区别相同的头
list = ListUtil.changeSameval(list);
map.put(list.get(idx++), getStringCellValue(cell));
}
}
idx = 0;
mapList.add(map);
}
return mapList;
} catch (IOException ex) {
ex.printStackTrace();
}
return null;
}
public static int mergeCell(Sheet sheet,int firstRow,int lastRow,int firstCol,int lastCol){
if(sheet == null){
return -1;
}
return sheet.addMergedRegion(new CellRangeAddress(firstRow, lastRow, firstCol, lastCol));
}
public static void cancelMergeCell(Sheet sheet){
int sheetMergeCount = sheet.getNumMergedRegions();
for(int idx = 0; idx < sheetMergeCount;){
CellRangeAddress range = sheet.getMergedRegion(idx);
String val = getMergeCellValue(sheet,range.getFirstRow(),range.getLastRow());
// 取消合并单元格
sheet.removeMergedRegion(idx);
for(int rownum=range.getFirstRow();rownum= firstRow && row <= lastRow){
if(column >= firstColumn && column <= lastColumn){
return true;
}
}
i++;
}
return false;
}
public static boolean isContainMergeCell(Sheet sheet){
if(sheet == null){
return false;
}
return sheet.getNumMergedRegions()>0 ? true : false;
}
public static String getMergeCellValue(Sheet sheet,
int row ,int column){
int sheetMergeCount = sheet.getNumMergedRegions();
for(int i = 0; i < sheetMergeCount;){
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){
Row fRow = sheet.getRow(firstRow);
Cell fCell = fRow.getCell(firstColumn);
return getStringCellValue(fCell) ;
}
}
i++;
}
return null;
}
public static String getStringCellValue(Cell cell) {
String strCell = "";
if(cell==null) return strCell;
switch (cell.getCellType()) {
case Cell.CELL_TYPE_STRING:
strCell = cell.getRichStringCellValue().getString().trim();
break;
case Cell.CELL_TYPE_NUMERIC:
strCell = String.valueOf(cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_BOOLEAN:
strCell = String.valueOf(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_FORMULA:
Formulaevaluator evaluator = cell.getSheet().getWorkbook().getCreationHelper().createFormulaevaluator();
evaluator.evaluateFormulaCell(cell);
CellValue cellValue = evaluator.evaluate(cell);
strCell = String.valueOf(cellValue.getNumberValue()) ;
break;
default:
strCell = "";
}
return strCell;
}
}
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调用方式如下
ExcelUtilTester.java
package pers.kangxu.datautils.test;
import java.util.ArrayList;
import java.util.List;
import pers.kangxu.datautils.utils.ExcelUtil;
public class ExcelUtilTester {
public static void main(String[] args) {
List datas = new ArrayList();
datas.add(new String[]{"狗熊","母","250"});
datas.add(new String[]{"猪粮","不明","251"});
//ExcelUtil.writeExcel("C:\Users\Administrator\Desktop\test\test\test.xls","sheet1",0, new String[]{"姓名","年龄","性别"}, datas);
System.out.println(ExcelUtil.readExcel("C:\Users\Administrator\Desktop\test\test\test.xls", 0));
}
}
以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持考高分网！
