這里用一個(gè)簡(jiǎn)單的例子來(lái)演示 java操作excel文件
用maven可以把包導(dǎo)入進(jìn)來(lái)：
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<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.9</version>
</dependency>
demo
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package com.example.demo.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;
/**
讀取Excel
-
@author zengwendong
*/
public class ReadExcelUtils {private Workbook wb;
private Sheet sheet;
private Row row;public ReadExcelUtils(String filepath) {
if (filepath == null) {
return;
}try { InputStream is = new FileInputStream(filepath); String ext = filepath.substring(filepath.lastIndexOf(".")); if (".xls".equals(ext)) { wb = new HSSFWorkbook(is); } else if (".xlsx".equals(ext)) { wb = new XSSFWorkbook(is); } else { wb = null; } } catch (FileNotFoundException e) { System.out.println(e.getLocalizedMessage() + "找不到文件"); } catch (IOException e) { System.out.println(e.getMessage() + "io的異常"); }}
/**
- 讀取Excel表格表頭的內(nèi)容
- @param InputStream
- @return String 表頭內(nèi)容的數(shù)組
- @author zengwendong
*/
public String[] readExcelTitle() throws Exception {
if (wb == null) {
throw new Exception("Workbook對(duì)象為空！");
}
sheet = wb.getSheetAt(0);
row = sheet.getRow(0);
// 標(biāo)題總列數(shù)
int colNum = row.getPhysicalNumberOfCells();
System.out.println("colNum:" + colNum);
String[] title = new String[colNum];
for (int i = 0; i < colNum; i++) {
// title[i] = getStringCellValue(row.getCell((short) i));
title[i] = row.getCell(i).getCellFormula();
}
return title;
}
/**
讀取Excel數(shù)據(jù)內(nèi)容
@param InputStream
@return Map 包含單元格數(shù)據(jù)內(nèi)容的Map對(duì)象
-
@author zengwendong
*/
public Map<Integer, Map<Integer, Object>> readExcelContent() throws Exception {
if (wb == null) {
throw new Exception("Workbook對(duì)象為空绞铃！");
}
Map<Integer, Map<Integer, Object>> content = new HashMap<Integer, Map<Integer, Object>>();sheet = wb.getSheetAt(0);
// 得到總行數(shù)
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();
// 正文內(nèi)容應(yīng)該從第二行開(kāi)始,第一行為表頭的標(biāo)題
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;
}
/**
根據(jù)Cell類型設(shè)置數(shù)據(jù)
@param cell
@return
-
@author zengwendong
*/
private Object getCellFormatValue(Cell cell) {
Object cellvalue = "";
if (cell != null) {
// 判斷當(dāng)前Cell的Type
switch (cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC:// 如果當(dāng)前Cell的Type為NUMERIC
case Cell.CELL_TYPE_FORMULA: {
// 判斷當(dāng)前的cell是否為Date
if (DateUtil.isCellDateFormatted(cell)) {
// 如果是Date類型則儿捧，轉(zhuǎn)化為Data格式
// data格式是帶時(shí)分秒的：2013-7-10 0:00:00
// cellvalue = cell.getDateCellValue().toLocaleString();
// data格式是不帶帶時(shí)分秒的：2013-7-10
Date date = cell.getDateCellValue();
cellvalue = date;
} else {// 如果是純數(shù)字// 取得當(dāng)前Cell的數(shù)值 cellvalue = String.valueOf(cell.getNumericCellValue()); } break; } case Cell.CELL_TYPE_STRING:// 如果當(dāng)前Cell的Type為STRING // 取得當(dāng)前的Cell字符串 cellvalue = cell.getRichStringCellValue().getString(); break; default:// 默認(rèn)的Cell值 cellvalue = ""; }} else {
cellvalue = "";
}
return cellvalue;
}
public static void main(String[] args) {
try {
String filepath = "F:user.xls";
ReadExcelUtils excelReader = new ReadExcelUtils(filepath);
// 對(duì)讀取Excel表格標(biāo)題測(cè)試
// String[] title = excelReader.readExcelTitle();
// System.out.println("獲得Excel表格的標(biāo)題:");
// for (String s : title) {
// System.out.print(s + " ");
// }
// 對(duì)讀取Excel表格內(nèi)容測(cè)試
Map<Integer, Map<Integer, Object>> map = excelReader.readExcelContent();
System.out.println("獲得Excel表格的內(nèi)容:");
for (int i = 1; i <= map.size(); i++) {
System.out.println(map.get(i));
}
} catch (FileNotFoundException e) {
System.out.println("未找到指定路徑的文件!");
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
