poi读取Excel总结

package eiis.controller.app.sbz;

import eiis.app.sbz.entity.AppWatStationEntity;
import eiis.app.sbz.service.IAppWatStationService;
import eiis.app.sbz.util.ReadAndWriteExcelUtil;
import jxl.read.biff.BiffException;
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.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import java.io.*;
import java.math.BigDecimal;
import java.time.Instant;
import java.util.*;

/**
* Created by Administrator on 2017/3/8.
*/
@RequestMapping("/sbz/")
@Controller("/controller/app/sbz/AppWatStationController")
public class AppWatStationController {
@Autowired
private IAppWatStationService iAppWatStationService;
public List<AppWatStationEntity> appWatStationEntity = new ArrayList();

@ResponseBody
@RequestMapping("appWatStation_readExcel")
public String readFile(AppWatStationEntity appWatStationEntity, String data) throws IOException, BiffException {

return "SUCCESS";
}

/*  @RequestMapping(value = "readExcel", method = RequestMethod.POST, params = {"filename", "suffix"})
@ResponseBody*/
public String readexcel(HttpServletRequest request) throws Exception {

Workbook wb = null;
String filename = request.getParameter("filename");
String suffix = request.getParameter("suffix");
String filepath = "D://"+filename;
InputStream is = new FileInputStream(filepath);
if(".xls".equals(suffix)){
wb = new HSSFWorkbook(is);
System.out.println("文件格式为.xls");
}else if(".xlsx".equals(suffix)){
wb = new XSSFWorkbook(is);
System.out.println("文件格式为.xlsx");
}else {
System.out.println("文件格式错误！");
}
List<List<Map<String, String>>> result = new ArrayList<List<Map<String,String>>>();//对应excel文件
int sheetSize = wb.getNumberOfSheets();
System.out.println(sheetSize);
for (int i = 0; i < sheetSize; i++) {//遍历sheet页
Sheet sheet = wb.getSheetAt(i);

List<Map<String, String>> sheetList = new ArrayList<Map<String, String>>();//对应sheet页
List<String> titles = new ArrayList<String>();//放置所有的标题
int rowSize = sheet.getLastRowNum() + 1;
for (int j = 1; j < rowSize; j++) {//遍历行
Row row = sheet.getRow(j);
if (row == null) {//略过空行
continue;
}
int cellSize = row.getLastCellNum();//行中有多少个单元格，也就是有多少列
if (j == 0 || j==1) {//第一行是标题行
for (int k = 0; k < cellSize; k++) {
Cell cell = row.getCell(k);
titles.add(cell.toString());
}
} else {//其他行是数据行
Map<String, String> rowMap = new HashMap<String, String>();//对应一个数据行
for (int k = 0; k < titles.size(); k++) {
Cell cell = row.getCell(k);
String key = titles.get(k);
String value = null;
if (cell != null) {
value = cell.toString();
}
rowMap.put(key, value);
}
sheetList.add(rowMap);
}
}
System.out.println(sheetList);
result.add(sheetList);
}

return null;
}

@RequestMapping(value = "readExcel", method = RequestMethod.POST, params = {"filename", "suffix"})
@ResponseBody
public String  readExcelWithoutTitle(HttpServletRequest request) throws Exception{
Workbook wb = null;
String filename = request.getParameter("filename");
String suffix = request.getParameter("suffix");
String filepath = "D://"+filename;
InputStream is = new FileInputStream(filepath);
if(".xls".equals(suffix)){
wb = new HSSFWorkbook(is);
System.out.println("文件格式为.xls");
}else if(".xlsx".equals(suffix)){
wb = new XSSFWorkbook(is);
System.out.println("文件格式为.xlsx");
}else {
System.out.println("文件格式错误！");
}

List<List<List<String>>> result = new ArrayList<List<List<String>>>();//对应excel文件

int sheetSize = wb.getNumberOfSheets();
for (int i = 0; i < sheetSize; i++) {//遍历sheet页
Sheet sheet = wb.getSheetAt(i);
List<List<String>> sheetList = new ArrayList<List<String>>();//对应sheet页

int rowSize = sheet.getLastRowNum() + 1;
for (int j = 3; j < rowSize; j++) {//遍历行
Row row = sheet.getRow(j);
if (row == null) {//略过空行
continue;
}
int cellSize = row.getLastCellNum();//行中有多少个单元格，也就是有多少列
List<String> rowList = new ArrayList<String>();//对应一个数据行
for (int k = 0; k < cellSize; k++) {
Cell cell = row.getCell(k);
String value = null;
if (cell != null) {
value = cell.toString();
if (k==2 && value!=null){
String string =  row.getCell(2).getCellComment().toString();

}

}
rowList.add(value);
}
sheetList.add(rowList);
}
System.out.println(sheetList);
result.add(sheetList);

}
return null;

}

}