java读取excel工具类 java读取简单excel通用工具类

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;


/**
 * 读取Excel通用工具类
 * @author zql
 */
public class ReadExcel {

 /**
 * 读取Excel
 * 
 * @param filepath 文件路径
 * @param filename 文件名，包括扩展名
 * @param startrow 开始行号，索引从0开始
 * @param startcol 开始列号，索引从0开始
 * @param sheetnum 工作簿，索引从0开始
 * @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;
 }
 
 /**
 * 读取2003Excel
 * 
 * @param filepath 文件路径
 * @param filename 文件名，包括扩展名
 * @param startrow 开始行号，索引从0开始
 * @param startcol 开始列号，索引从0开始
 * @param sheetnum 工作簿，索引从0开始
 * @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 从0开始
 HSSFSheet sheet = wb.getSheetAt(sheetnum);
 // 取得最后一行的行号
 int rowNum = sheet.getLastRowNum() + 1;

 HSSFRow rowTitle = sheet.getRow(0);
 // 标题行的最后一个单元格位置
 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] = "";
 }
 }

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

  HSSFCell cell = row.getCell(Short.parseShort(j + ""));
  String cellValue = "";
  if (cell != null) {
  // 把类型先设置为字符串类型
  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;
 }
 
 /**
 * 读取2007Excel
 * 
 * @param filepath 文件路径
 * @param filename 文件名，包括扩展名
 * @param startrow 开始行号，索引从0开始
 * @param startcol 开始列号，索引从0开始
 * @param sheetnum 工作簿，索引从0开始
 * @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工作表对象
 XSSFSheet sheet = wb.getSheetAt(sheetnum);
 // 取得最后一行的行号
 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) {
  // 把类型先设置为字符串类型
  cell.setCellType(CellType.STRING);
  title[i] = cell.getStringCellValue();
 } else {
  title[i] = "";
 }
 }

 // 行循环开始
 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);
 // 列循环开始
 for (int j = startcol; j < cellTitleNum; j++) {
  // 得到Excel工作表指定行的单元格
  XSSFCell cell = row.getCell(j);
  String cellValue = "";
  if (cell != null) {
  // 把类型先设置为字符串类型
  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;
 }
 
}

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", "测试表格.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", "测试表格.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();
 }
 }
 }

}

<!-- 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>