java讀取簡單excel通用工具類

更新時間：2020年12月31日 10:31:14 作者：似水流年風蕭兮

這篇文章主要為大家詳細介紹了java讀取簡單excel通用工具類，文中示例代碼介紹的非常詳細，具有一定的參考價值，感興趣的小伙伴們可以參考一下

本文實例為大家分享了java讀取簡單excel通用工具類的具體代碼，供大家參考，具體內容如下

讀取excel通用工具類

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.poi.hssf.usermodel.HSSFCell;
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.ss.usermodel.CellType;
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;


/**
 * 讀取Excel通用工具類
 * @author zql
 */
public class ReadExcel {

 /**
 * 讀取Excel
 * 
 * @param filepath 文件路徑
 * @param filename 文件名，包括擴展名
 * @param startrow 開始行號，索引從0開始
 * @param startcol 開始列號，索引從0開始
 * @param sheetnum 工作簿，索引從0開始
 * @return
 */
 public List<Map<String,String>> readExcel(String filepath, String filename, int startrow, int startcol, int sheetnum) {
 List<Map<String, String>> varList = new ArrayList<Map<String, String>>();
 String suffix = filename.substring(filename.lastIndexOf(".") + 1);
 if ("xls".equals(suffix)) {
 varList = readExcel2003(filepath, filename, startrow, startcol, sheetnum);
 } else if ("xlsx".equals(suffix)) {
 varList = readExcel2007(filepath, filename, startrow, startcol, sheetnum);
 } else {
 System.out.println("Only excel files with XLS or XLSX suffixes are allowed to be read!");
 return null;
 }
 return varList;
 }
 
 /**
 * 讀取2003Excel
 * 
 * @param filepath 文件路徑
 * @param filename 文件名，包括擴展名
 * @param startrow 開始行號，索引從0開始
 * @param startcol 開始列號，索引從0開始
 * @param sheetnum 工作簿，索引從0開始
 * @return
 */
 public List<Map<String,String>> readExcel2003(String filepath, String filename, int startrow, int startcol, int sheetnum) {
 List<Map<String, String>> varList = new ArrayList<Map<String, String>>();
 try {
 File target = new File(filepath, filename);
 FileInputStream fis = new FileInputStream(target);
 HSSFWorkbook wb = new HSSFWorkbook(fis);
 fis.close();
 // sheet 從0開始
 HSSFSheet sheet = wb.getSheetAt(sheetnum);
 // 取得最后一行的行號
 int rowNum = sheet.getLastRowNum() + 1;

 HSSFRow rowTitle = sheet.getRow(0);
 // 標題行的最后一個單元格位置
 int cellTitleNum = rowTitle.getLastCellNum();
 String[] title = new String[cellTitleNum];
 for (int i = startcol; i < cellTitleNum; i++) {
 HSSFCell cell = rowTitle.getCell(Short.parseShort(i + ""));
 if (cell != null) {
  cell.setCellType(CellType.STRING);
  title[i] = cell.getStringCellValue();
 } else {
  title[i] = "";
 }
 }

 // 行循環(huán)開始
 for (int i = startrow + 1; i < rowNum; i++) {
 Map<String, String> varpd = new HashMap<String, String>();
 // 行
 HSSFRow row = sheet.getRow(i);
 // 列循環(huán)開始
 for (int j = startcol; j < cellTitleNum; j++) {

  HSSFCell cell = row.getCell(Short.parseShort(j + ""));
  String cellValue = "";
  if (cell != null) {
  // 把類型先設置為字符串類型
  cell.setCellType(CellType.STRING);
  cellValue = cell.getStringCellValue();
  }
  varpd.put(title[j], cellValue);
 }
 varList.add(varpd);
 }
 wb.close();
 } catch (Exception e) {
 System.out.println(e);
 }
 return varList;
 }
 
 /**
 * 讀取2007Excel
 * 
 * @param filepath 文件路徑
 * @param filename 文件名，包括擴展名
 * @param startrow 開始行號，索引從0開始
 * @param startcol 開始列號，索引從0開始
 * @param sheetnum 工作簿，索引從0開始
 * @return
 */
 public List<Map<String,String>> readExcel2007(String filepath, String filename, int startrow, int startcol, int sheetnum) {
 List<Map<String, String>> varList = new ArrayList<Map<String, String>>();
 try {
 File target = new File(filepath, filename);
 InputStream ins = new FileInputStream(target);
 XSSFWorkbook wb = new XSSFWorkbook(ins);
 ins.close();
 // 得到Excel工作表對象
 XSSFSheet sheet = wb.getSheetAt(sheetnum);
 // 取得最后一行的行號
 int rowNum = sheet.getLastRowNum() + 1;

 XSSFRow rowTitle = sheet.getRow(0);
 int cellTitleNum = rowTitle.getLastCellNum();
 String[] title = new String[cellTitleNum];
 for (int i = startcol; i < cellTitleNum; i++) {
 XSSFCell cell = rowTitle.getCell(Short.parseShort(i + ""));
 if (cell != null) {
  // 把類型先設置為字符串類型
  cell.setCellType(CellType.STRING);
  title[i] = cell.getStringCellValue();
 } else {
  title[i] = "";
 }
 }

 // 行循環(huán)開始
 for (int i = startrow + 1; i < rowNum; i++) {
 Map<String, String> varpd = new HashMap<String, String>();
 // 得到Excel工作表的行
 XSSFRow row = sheet.getRow(i);
 // 列循環(huán)開始
 for (int j = startcol; j < cellTitleNum; j++) {
  // 得到Excel工作表指定行的單元格
  XSSFCell cell = row.getCell(j);
  String cellValue = "";
  if (cell != null) {
  // 把類型先設置為字符串類型
  cell.setCellType(CellType.STRING);
  cellValue = cell.getStringCellValue();
  }
  varpd.put(title[j], cellValue);
 }
 varList.add(varpd);
 }
 wb.close();
 } catch (Exception e) {
 System.out.println(e);
 }
 return varList;
 }
 
}

讀取excel通用工具示例測試類

import java.util.List;
import java.util.Map;

/**
 * @author zql
 *
 */
public class ReadExcelTest {
 
 public static void main(String[] args) throws Exception {
 ReadExcel r = new ReadExcel();
 List<Map<String, String>> list = r.readExcel("e:\\excel", "測試表格.xls", 0, 0, 0);
 if (list != null) {
 for (int i = 0; i < list.size(); i++) {
 Map<String, String> m = list.get(i);
 m.forEach((key, value) -> {
  System.out.println(key + ":" + value);
 });
 System.out.println();
 }
 }

 List<Map<String, String>> lists = r.readExcel("e:\\excel", "測試表格.xlsx", 0, 0, 0);
 if (lists != null) {
 for (int i = 0; i < lists.size(); i++) {
 Map<String, String> m = lists.get(i);
 m.forEach((key, value) -> {
  System.out.println(key + ":" + value);
 });
 System.out.println();
 }
 }
 }

}

普通項目需要引入的包

poi-4.0.1.jar
poi-ooxml-4.0.1.jar
poi-ooxml-schemas-4.0.1.jar
commons-codec-1.11.jar
commons-collections4-4.3.jar
commons-math3-3.6.1.jar
xmlbeans-3.0.2.jar
commons-compress-1.18.jar
curvesapi-1.06.jar

maven項目依賴

<!-- poi -->
<dependency>
 <groupId>org.apache.poi</groupId>
 <artifactId>poi</artifactId>
 <version>4.0.1</version>
</dependency>
<dependency>
 <groupId>org.apache.poi</groupId>
 <artifactId>poi-ooxml</artifactId>
 <version>4.0.1</version>
</dependency>

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。

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