java 解析excel工具类

CreateTime--2018年3月5日16:48:08

Author:Marydon

　　ReadExcelUtils.java

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.log4j.Logger;
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;

/**
* excel解析工具类
* @author Marydon
* @createTime 2018年2月1日下午12:54:09
* @updateTime
* @Email:Marydon20170307@163.com
* @version:1.0.0
*/
public class ReadExcelUtils {
private Logger logger = Logger.getLogger(this.getClass());
private Workbook wb;
private Sheet sheet;
private Row row;

public ReadExcelUtils(String filepath) {
if (filepath == null) {
return;
}
String fileType = filepath.substring(filepath.lastIndexOf("."));
try {
InputStream is = new FileInputStream(filepath);
if (".xls".equals(fileType)) {
wb = new HSSFWorkbook(is);
} else if (".xlsx".equals(fileType)) {
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
*
* @param InputStream
* @return String 表头内容的数组
* @author zengwendong
*/
public String[] readExcelTitle() throws Exception {
if (wb == null) {
throw new Exception("Workbook对象为空！");
}
sheet = wb.getSheetAt(0);
row = sheet.getRow(0);
// 标题总列数
int colNum = row.getPhysicalNumberOfCells();
System.out.println("colNum:" + colNum);
String[] title = new String[colNum];
for (int i = 0; i < colNum; i++) {
title[i] = row.getCell(i).getCellFormula();
}
return title;
}

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

sheet = wb.getSheetAt(0);
// 得到总行数
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();
//
Map<String, Object> cellValue = null;
//
if (null == columnsList || columnsList.size() != colNum || columnsList.isEmpty()) {
// 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++) {
// 获取当前行
row = sheet.getRow(i);
int j = 0;
cellValue = new HashMap<String, Object>();

while (j < colNum) {
Object obj = getCellFormatValue(row.getCell(j));
cellValue.put(String.valueOf(j), obj);
j++;
}
content.add(cellValue);
}
} else {
// 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++) {
// 获取当前行
row = sheet.getRow(i);
int j = 0;
cellValue = new HashMap<String, Object>();

while (j < colNum) {
Object obj = getCellFormatValue(row.getCell(j));
cellValue.put(columnsList.get(j), obj);
j++;
}
content.add(cellValue);
}
}
return content;
}

/**
*
* 根据Cell类型设置数据
*
* @param cell
* @return
* @author zengwendong
*/
private Object getCellFormatValue(Cell cell) {
Object cellvalue = "";
// 非空
if (null != cell && (!"".equals(cell.toString()))) {
// 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

// 取得当前Cell的数值
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;
}

}

　　测试

public static void main(String[] args) {
try {
String filepath = "C:\\Users\\Marydon\\Desktop\\值班名单汇总 (20170714).xlsx";
ReadExcelUtils excelReader = new ReadExcelUtils(filepath);
// 说明：excel的列的所代表的字段的顺序必须与list集合的字段名一致（excel的列名和list的元素名没必要相同）
List<String> columnsList = new ArrayList<String>();
columnsList.add("ORG_ID");
columnsList.add("DEPENT_ID");
columnsList.add("DEPENT_NAME");
columnsList.add("DOCTOR_ID");
columnsList.add("DOCTOR_NAME");
columnsList.add("DOCTOR_PHONE");
columnsList.add("SCHEDULE_DATE");
columnsList.add("WEEK_TXT");
columnsList.add("WB_TYPE");
columnsList.add("CLOSE_TZ");
columnsList.add("REPLACE_TZ");
columnsList.add("DOCTOR_ID_TZ");
columnsList.add("DOCTOR_NAME_TZ");
columnsList.add("REMARK");

// 对读取Excel表格内容测试
List<Map> list = excelReader.readExcelContent(columnsList);
System.out.println("获得Excel表格的内容:");
for (int i = 0; i < list.size(); i++) {
System.out.println(list.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();
}
} 

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