import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.log4j.Logger;
import org.apache.poi.EncryptedDocumentException;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.CellRangeAddress;
import org.apache.poi.hssf.util.HSSFColor;
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.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;
/**
* excel读写工具类
* 2016年8月21日
*/
public class POIUtil {
private static Logger logger = Logger.getLogger(POIUtil.class);
private final static String xls = "xls";
private final static String xlsx = "xlsx";
/**
* 读入excel文件，解析后返回
* @param inputStream
* @throws IOException
*/
public Map<String,List<String[]>> readExcel(InputStream inputStream) throws IOException{
//获得Workbook工作薄对象
Workbook workbook = null;
try {
workbook = WorkbookFactory.create(inputStream);
} catch (EncryptedDocumentException e) {
e.printStackTrace();
} catch (InvalidFormatException e) {
e.printStackTrace();
}
//创建返回对象，把每行中的值作为一个数组，所有行作为一个集合返回
Map<String,List<String[]>> excelMap = new HashMap<>();
if(workbook != null){
for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){
List<String[]> list = new ArrayList<String[]>();
if(sheetNum == 2){
break;
}
//获得当前sheet工作表
Sheet sheet = workbook.getSheetAt(sheetNum);
if(sheet == null){
continue;
}
//获得当前sheet的开始行
int firstRowNum = sheet.getFirstRowNum();
//获得当前sheet的结束行
int lastRowNum = sheet.getLastRowNum();
//获得当前行的开始列
int firstCellNum = 0;
//获得当前行的列数
int lastCellNum = 0;
//循环所有行
for(int rowNum = firstRowNum;rowNum <= lastRowNum;rowNum++){
//获得当前行
Row row = sheet.getRow(rowNum);
if(row == null){
continue;
}
if(0 == rowNum){
firstCellNum = row.getFirstCellNum();
lastCellNum = row.getLastCellNum();
}
String[] cells = new String[lastCellNum];
//循环当前行
for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
Cell cell = row.getCell(cellNum);
cells[cellNum] = getCellValue(cell);
}
list.add(cells);
}
if(sheetNum == 0){
excelMap.put("case", list);
}else if(sheetNum == 1){
excelMap.put("party", list);
}
}
workbook.close();
}
return excelMap;
}
public static void checkFile(MultipartFile file) throws IOException{
//判断文件是否存在
if(null == file){
logger.error("文件不存在！");
throw new FileNotFoundException("文件不存在！");
}
//获得文件名
String fileName = file.getOriginalFilename();
//判断文件是否是excel文件
if(!fileName.endsWith(xls) && !fileName.endsWith(xlsx)){
logger.error(fileName + "不是excel文件");
throw new IOException(fileName + "不是excel文件");
}
}
public static Workbook getWorkBook(MultipartFile file) {
//获得文件名
String fileName = file.getOriginalFilename();
//创建Workbook工作薄对象，表示整个excel
Workbook workbook = null;
try {
//获取excel文件的io流
InputStream is = file.getInputStream();
//根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象
if(fileName.endsWith(xls)){
//2003
workbook = new HSSFWorkbook(is);
}else if(fileName.endsWith(xlsx)){
//2007
workbook = new XSSFWorkbook(is);
}
} catch (IOException e) {
logger.info(e.getMessage());
}
return workbook;
}
public static String getCellValue(Cell cell){
String cellValue = "";
if(cell == null){
return cellValue;
}
//把数字当成String来读，避免出现1读成1.0的情况
if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){
cell.setCellType(Cell.CELL_TYPE_STRING);
}
//判断数据的类型
switch (cell.getCellType()){
case Cell.CELL_TYPE_NUMERIC: //数字
cellValue = String.valueOf(cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_STRING: //字符串
cellValue = String.valueOf(cell.getStringCellValue());
break;
case Cell.CELL_TYPE_BOOLEAN: //Boolean
cellValue = String.valueOf(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_FORMULA: //公式
cellValue = String.valueOf(cell.getCellFormula());
break;
case Cell.CELL_TYPE_BLANK: //空值
cellValue = "";
break;
case Cell.CELL_TYPE_ERROR: //故障
cellValue = "非法字符";
break;
default:
cellValue = "未知类型";
break;
}
return cellValue;
}
/**
* 数据导出至excel
* @param path
* @param title
* @param sheetName
* @param headers
* @param datas
*/
public static String expExs(String path,String title,String sheetName,List<String> headers,List<List<String>> datas){
try {
if(sheetName== null || "".equals(sheetName)){ sheetName = "sheet"; }
//判断路径是否存在
boolean isExist = new File(path).exists();
if(!isExist){
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet(sheetName);
FileOutputStream out = new FileOutputStream(new File(path));
workbook.write(out);
out.flush();
out.close();
}
FileInputStream file = new FileInputStream(new File(path));
HSSFWorkbook workbook = new HSSFWorkbook(file);
HSSFSheet sheet = null;
if(!isExist){
sheet = workbook.getSheetAt(0);
}else{
if(workbook.getSheet(sheetName) == null){
sheet = workbook.createSheet(sheetName); //+workbook.getNumberOfSheets()
}else{
System.out.println("文件：["+path+"] ["+sheetName+"] 已经存在...");
return "error";
}
}
HSSFRow row;
HSSFCell cell;
// 设置这些样式
HSSFFont font = workbook.createFont();
font.setFontName("黑体");//字体
font.setFontHeightInPoints((short) 14);//字号
HSSFCellStyle cellStyle= workbook.createCellStyle(); //设置单元格样式
cellStyle.setFillForegroundColor(HSSFColor.PALE_BLUE.index);
cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
cellStyle.setFont(font);
//产生表格大标题
HSSFRow firstHeaderRow = sheet.createRow(0);
sheet.addMergedRegion(new CellRangeAddress(0,0,0,headers.size()-1));
HSSFCell yearCell = firstHeaderRow.createCell(0);
yearCell.setCellValue(title);
yearCell.setCellStyle(cellStyle);
//产生表格标题行
row = sheet.createRow(1);
row.setHeightInPoints(20);
for (int i = 0; i < headers.size(); i++) {
HSSFRichTextString text = new HSSFRichTextString(headers.get(i).toString());
cell = row.createCell(i);
cell.setCellValue(text);
cell.setCellStyle(cellStyle);
}
font = workbook.createFont();
font.setFontName("黑体");//字体
font.setFontHeightInPoints((short) 12);//字号
cellStyle= workbook.createCellStyle();
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
cellStyle.setDataFormat((short)0x31);//设置显示格式，避免点击后变成科学计数法了
cellStyle.setFont(font);
List<String> rowItem;
//遍历集合数据，产生数据行
for (int i = 0; i < datas.size(); i++) {
row=sheet.createRow((i+2));
row.setHeightInPoints(20);
rowItem = datas.get(i);
for(int j = 0;j < rowItem.size(); j++) {
cell = row.createCell(j);
cell.setCellStyle(cellStyle);
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
if(rowItem.get(j) != null) {
cell.setCellValue(new HSSFRichTextString(rowItem.get(j)));
}else{
cell.setCellValue(new HSSFRichTextString(""));
}
}
//合计
if(i == datas.size() - 1){
row = sheet.createRow(i + 2);
sheet.addMergedRegion(new CellRangeAddress(i+2,i+2,0,1));
cell = row.createCell(0);
cell.setCellValue("合计");
cell.setCellStyle(cellStyle);
for(int k = 0;k < rowItem.size(); k++){
if(k == 0 || k == 1){
continue;
}
cell = row.createCell(k);
cell.setCellStyle(cellStyle);
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
if(rowItem.get(k) != null) {
cell.setCellValue(new HSSFRichTextString(rowItem.get(k)));
}else{
cell.setCellValue(new HSSFRichTextString(""));
}
}
}
}
for (int i = 0; i < headers.size(); i++) {
//sheet.autoSizeColumn((short)i,true);
int cellLength = headers.get(i).getBytes().length;
if(i == 1){
sheet.setColumnWidth(i,cellLength*6*256);
}else{
sheet.setColumnWidth(i,cellLength*256);
}
}
FileOutputStream out = new FileOutputStream(new File(path));
workbook.write(out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
return "error";
}
System.out.println("文件：["+path+"] ["+sheetName+"] 创建成功...");
return "success";
}
}
Excel读写工具类
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转载自blog.csdn.net/sheng_xinjun/article/details/81201946
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