java解析excel

package com.yunos.tv.tao.admin.common.util;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;

/**
* @Author xuzhiwu
* @Date 17/8/16 下午1:50
*/
public class ExcelUtil {
private Logger logger = LoggerFactory.getLogger(ExcelUtil.class);
private Workbook wb;//excel工作簿
private Sheet sheet;//表格
private Row row;//行

public ExcelUtil(MultipartFile file) {
if(file==null){
return;
}
String filepath = file.getOriginalFilename();
String ext = filepath.substring(filepath.lastIndexOf("."));
try {
InputStream is = file.getInputStream();
if(".xls".equals(ext)){
wb = new HSSFWorkbook(is);
}else if(".xlsx".equals(ext)){
wb = new XSSFWorkbook(is);
}else{
wb=null;
}
} catch (FileNotFoundException e) {
logger.error("FileNotFoundException", e);
} catch (IOException e) {
logger.error("IOException", e);
}
}

/**
* 读取Excel表格表头的内容
* @return String 表头内容的数组
* @throws Exception
*/
public String[] readExcelTitle() throws Exception{
if(wb==null){
throw new Exception("Workbook对象为空！");
}
//获取第一个sheet内容
sheet = wb.getSheetAt(0);
row = sheet.getRow(0);
// 标题总列数
int colNum = row.getPhysicalNumberOfCells();

String[] title = new String[colNum];
for (int i = 0; i < colNum; i++) {
Object obj = getCellFormatValue(row.getCell(i));

title[i] = (String)obj;
}
return title;
}

/**
* 读取Excel数据内容
* @return 包含单元格数据内容的Map对象
* @throws Exception
*/
public Map<Integer, Map<Integer,Object>> readExcelContent() throws Exception{
if(wb==null){
throw new Exception("Workbook对象为空！");
}
Map<Integer, Map<Integer,Object>> content = new HashMap<Integer, Map<Integer,Object>>();

sheet = wb.getSheetAt(0);
// 得到总行数
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();
// 正文内容应该从第二行开始,第一行为表头的标题
for (int i = 1; i <= rowNum; i++) {
row = sheet.getRow(i);
int j = 0;
Map<Integer,Object> cellValue = new HashMap<Integer, Object>();
while (j < colNum) {
Object obj = getCellFormatValue(row.getCell(j));
cellValue.put(j, obj);
j++;
}
content.put(i, cellValue);
}
return content;
}

/**
* 根据Cell类型设置数据
* @param cell
* @return
*/
private Object getCellFormatValue(Cell cell) {
Object cellvalue = "";
if (cell != null) {
// 判断当前Cell的Type
switch (cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC:// 如果当前Cell的Type为NUMERIC
case Cell.CELL_TYPE_FORMULA: {
// 判断当前的cell是否为Date
if (DateUtil.isCellDateFormatted(cell)) {
// 如果是Date类型则，转化为Data格式
// data格式是带时分秒的：2013-7-10 0:00:00
// cellvalue = cell.getDateCellValue().toLocaleString();
// data格式是不带带时分秒的：2013-7-10
Date date = cell.getDateCellValue();
cellvalue = date;
} else {// 如果是纯数字,防止被格式化成科学计数法
cellvalue = String.valueOf(cell.getNumericCellValue());
}
break;
}
case Cell.CELL_TYPE_STRING:// 如果当前Cell的Type为STRING
// 取得当前的Cell字符串
cellvalue = cell.getRichStringCellValue().getString();
break;
default:// 默认的Cell值
cellvalue = "";
}
} else {
cellvalue = "";
}
return cellvalue;
}

//public static void main(String[] args) {
// try {
// String filepath = "/Users/rcer/Downloads/56.xls";
// ExcelUtil excelReader = new ExcelUtil(filepath);
// Map<Integer, Map<Integer,Object>> map = excelReader.readExcelContent();
// String[] titles = excelReader.readExcelTitle();
// System.out.println("获得Excel表格的内容:");
// for (String title:titles) {
// System.out.print(title+" ");
// }
// System.out.println();
// for (int i = 1; i <= map.size(); i++) {
// System.out.println(map.get(i));
// }
// } catch (FileNotFoundException e) {
// System.out.println("未找到指定路径的文件!");
// e.printStackTrace();
// }catch (Exception e) {
// e.printStackTrace();
// }
//}
}