poi

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package com.citi.training.excel;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.LinkedList;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
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.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class ReadExcel {
/**
* 对外提供读取excel 的方法
* */
public static List<List<Object>> readExcel(File file) throws IOException {
  String fileName = file.getName();
  String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName.substring(fileName.lastIndexOf(".") + 1);
  if ("xls".equals(extension)) {
   return read2003Excel(file);
  } else if ("xlsx".equals(extension)) {
   return read2007Excel(file);
  } else {
   throw new IOException("不支持的文件类型");
  }
}

/**
* 读取 office 2003 excel
*
* @throws IOException
* @throws FileNotFoundException
*/
private static List<List<Object>> read2003Excel(File file) throws IOException {

  List<List<Object>> list = new LinkedList<List<Object>>();
  HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
  HSSFSheet sheet = hwb.getSheetAt(0);
  Object value = null;
  HSSFRow row = null;
  HSSFCell cell = null;
  int counter = 0;
  for (int i = sheet.getFirstRowNum(); counter < sheet.getPhysicalNumberOfRows(); i++) {
   row = sheet.getRow(i);
   if (row == null) {
    continue;
   } else {
    counter++;
   }
   List<Object> linked = new LinkedList<Object>();
   for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
    cell = row.getCell(j);
    if (cell == null) {
     continue;
    }

    /*DecimalFormat df = new DecimalFormat("0");// 格式化 number String
               // 字符
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
    DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
    switch (cell.getCellType()) {
    case XSSFCell.CELL_TYPE_STRING:
     System.out.println(i + "行" + j + " 列 is String type");
     value = cell.getStringCellValue();
     break;
    case XSSFCell.CELL_TYPE_NUMERIC:
     System.out.println(i + "行" + j + " 列 is Number type ; DateFormt:" + cell.getCellStyle().getDataFormatString());
     if ("@".equals(cell.getCellStyle().getDataFormatString())) {
      value = df.format(cell.getNumericCellValue());
     } else if ("General".equals(cell.getCellStyle()
       .getDataFormatString())) {
      value = nf.format(cell.getNumericCellValue());
     } else {
      value = sdf.format(HSSFDateUtil.getJavaDate(cell
        .getNumericCellValue()));
     }
     break;
    case XSSFCell.CELL_TYPE_BOOLEAN:
     System.out.println(i + "行" + j + " 列 is Boolean type");
     value = cell.getBooleanCellValue();
     break;
    case XSSFCell.CELL_TYPE_BLANK:
     System.out.println(i + "行" + j + " 列 is Blank type");
     value = "";
     break;
    default:
     System.out.println(i + "行" + j + " 列 is default type");
     value = cell.toString();
    }*/
    /*
    if (value == null || "".equals(value)) {
     continue;
    }*/
    linked.add(cell.toString());
   }
   list.add(linked);
  }
  return list;
}

/**
* 读取Office 2007 excel
* */
private static List<List<Object>> read2007Excel(File file) throws IOException {

  List<List<Object>> list = new LinkedList<List<Object>>();
  // 构造 XSSFWorkbook 对象，strPath 传入文件路径
  XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));
  // 读取第一章表格内容
  XSSFSheet sheet = xwb.getSheetAt(0);
  Object value = null;
  XSSFRow row = null;
  XSSFCell cell = null;
  int counter = 0;
  for (int i = sheet.getFirstRowNum(); counter < sheet
    .getPhysicalNumberOfRows(); i++) {
   row = sheet.getRow(i);
   if (row == null) {
    continue;
   } else {
    counter++;
   }
   List<Object> linked = new LinkedList<Object>();
   for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
    cell = row.getCell(j);
    if (cell == null) {
     continue;
    }
    DecimalFormat df = new DecimalFormat("0");// 格式化 number String
               // 字符
    SimpleDateFormat sdf = new SimpleDateFormat(
      "yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
    DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
    switch (cell.getCellType()) {
    case XSSFCell.CELL_TYPE_STRING:
     System.out.println(i + "行" + j + " 列 is String type");
     value = cell.getStringCellValue();
     break;
    case XSSFCell.CELL_TYPE_NUMERIC:
     System.out.println(i + "行" + j
       + " 列 is Number type ; DateFormt:"
       + cell.getCellStyle().getDataFormatString());
     if ("@".equals(cell.getCellStyle().getDataFormatString())) {
      value = df.format(cell.getNumericCellValue());
     } else if ("General".equals(cell.getCellStyle()
       .getDataFormatString())) {
      value = nf.format(cell.getNumericCellValue());
     } else {
      value = sdf.format(HSSFDateUtil.getJavaDate(cell
        .getNumericCellValue()));
     }
     break;
    case XSSFCell.CELL_TYPE_BOOLEAN:
     System.out.println(i + "行" + j + " 列 is Boolean type");
     value = cell.getBooleanCellValue();
     break;
    case XSSFCell.CELL_TYPE_BLANK:
     System.out.println(i + "行" + j + " 列 is Blank type");
     value = "";
     break;
    default:
     System.out.println(i + "行" + j + " 列 is default type");
     value = cell.toString();
    }
    if (value == null || "".equals(value)) {
     continue;
    }
    linked.add(value);
   }
   list.add(linked);
  }
  return list;
}

public static void main(String[] args) {
  try {
   List<List<Object>> list = readExcel(new File("H:\\test.xls"));
   // readExcel(new File("D:\\test.xls"));
   for(List<Object> l : list){
    for(Object o : l){
     if("zs".equals(o)){
      System.out.print(o+" ");
     }
      System.out.print(o+" ");

    }
    System.out.println();
   }
  } catch (IOException e) {
   e.printStackTrace();
  }
}
}

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