Java导入Excel工具

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.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.multipart.MultipartFile;

/**
* Mr.Bruce
*/
public class ReadExcel {
// 总行数
private int totalRows = 0;
// 总条数
private int totalCells = 0;
// 错误信息接收器
private String errorMsg;

// 构造方法
public ReadExcel() {
}

// 获取总行数
public int getTotalRows() {
return totalRows;
}

// 获取总列数
public int getTotalCells() {
return totalCells;
}

// 获取错误信息
public String getErrorInfo() {
return errorMsg;
}

/**
* 读EXCEL文件，获取信息集合
*
* @param mFile
* @return
*/
public List<Map<String, Object>> getExcelInfo(MultipartFile mFile) {
String fileName = mFile.getOriginalFilename();// 获取文件名
// List<Map<String, Object>> userList = new LinkedList<Map<String, Object>>();
try {
if (!validateExcel(fileName)) {// 验证文件名是否合格
return null;
}
boolean isExcel2003 = true;// 根据文件名判断文件是2003版本还是2007版本
if (isExcel2007(fileName)) {
isExcel2003 = false;
}
return createExcel(mFile.getInputStream(), isExcel2003);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

/**
* 根据excel里面的内容读取客户信息
*
* @param is 输入流
* @param isExcel2003 excel是2003还是2007版本
* @return
* @throws IOException
*/
public List<Map<String, Object>> createExcel(InputStream is, boolean isExcel2003) {
try {
Workbook wb = null;
if (isExcel2003) {// 当excel是2003时,创建excel2003
wb = new HSSFWorkbook(is);
} else {// 当excel是2007时,创建excel2007
wb = new XSSFWorkbook(is);
}
return readExcelValue(wb);// 读取Excel里面客户的信息
} catch (IOException e) {
e.printStackTrace();
}
return null;
}

/**
* 读取Excel里面客户的信息
*
* @param wb
* @return
*/
private List<Map<String, Object>> readExcelValue(Workbook wb) {
// 得到第一个shell
Sheet sheet = wb.getSheetAt(0);
// 得到Excel的行数
this.totalRows = sheet.getPhysicalNumberOfRows();
// 得到Excel的列数(前提是有行数)
if (totalRows > 1 && sheet.getRow(0) != null) {
this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
}
List<Map<String, Object>> userList = new ArrayList<Map<String, Object>>();
// 循环Excel行数
for (int r = 1; r < totalRows; r++) {
Row row = sheet.getRow(r);
if (row == null) {
continue;
}
// 循环Excel的列
Map<String, Object> map = new HashMap<String, Object>();
for (int c = 0; c < this.totalCells; c++) {
Cell cell = row.getCell(c);
if (null != cell) {
if (c == 0) {
// 如果是纯数字,比如你写的是25,cell.getNumericCellValue()获得是25.0,通过截取字符串去掉.0获得25
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String customerName = String.valueOf(cell.getNumericCellValue());
map.put("customerName", customerName);
} else {
map.put("customerName", cell.getStringCellValue());
}
} else if (c == 1) {
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String title = String.valueOf(cell.getNumericCellValue());
map.put("title",title);
} else {
map.put("title",cell.getStringCellValue());
}
} else if (c == 2) {
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String projectName = String.valueOf(cell.getNumericCellValue());
map.put("projectName", projectName);
} else {
map.put("projectName", cell.getStringCellValue());
}
} else if (c == 3){
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String targetMoney = String.valueOf(cell.getNumericCellValue());
map.put("targetMoney", targetMoney);
} else {
map.put("targetMoney", cell.getStringCellValue());
}
} else if (c == 4){
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String projectMoney = String.valueOf(cell.getNumericCellValue());
map.put("projectMoney", projectMoney);
} else {
map.put("projectMoney", cell.getStringCellValue());
}
}else if (c == 5){
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String jobTypeName = String.valueOf(cell.getNumericCellValue());
map.put("jobTypeName", jobTypeName);
} else {
map.put("jobTypeName", cell.getStringCellValue());
}
}else if (c == 6){
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String projectName = String.valueOf(cell.getNumericCellValue());
map.put("deptName", projectName);
} else {
map.put("deptName", cell.getStringCellValue());
}
}else if (c == 7){
if (cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC) {
String remarks = String.valueOf(cell.getNumericCellValue());
map.put("remarks", remarks);
} else {
map.put("remarks", cell.getStringCellValue());
}
}
}
}
// 添加到list
userList.add(map);
}
return userList;
}

/**
* 验证EXCEL文件
*
* @param filePath
* @return
*/
public boolean validateExcel(String filePath) {
if (filePath == null || !(isExcel2003(filePath) || isExcel2007(filePath))) {
errorMsg = "文件名不是excel格式";
return false;
}
return true;
}

// @描述：是否是2003的excel，返回true是2003
public static boolean isExcel2003(String filePath) {
return filePath.matches("^.+\\.(?i)(xls)$");
}

// @描述：是否是2007的excel，返回true是2007
public static boolean isExcel2007(String filePath) {
return filePath.matches("^.+\\.(?i)(xlsx)$");
}
}
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