java poi技术操作excel之读取Excel

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读取Excel代码：

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;

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;

public class ReadWriteExcel {

	private static final String EXCEL_XLS = "xls";
	private static final String EXCEL_XLSX = "xlsx";

	/**
	 * 判断Excel的版本,获取Workbook
	 * @param in
	 * @param filename
	 * @return
	 * @throws IOException
	 */
	public static Workbook getWorkbok(InputStream in,File file) throws IOException{
		Workbook wb = null;
		if(file.getName().endsWith(EXCEL_XLS)){	 //Excel 2003
			wb = new HSSFWorkbook(in);
		}else if(file.getName().endsWith(EXCEL_XLSX)){	// Excel 2007/2010
			wb = new XSSFWorkbook(in);
		}
		return wb;
	}

	/**
	 * 判断文件是否是excel
	 * @throws Exception 
	 */
	public static void checkExcelVaild(File file) throws Exception{
		if(!file.exists()){
			throw new Exception("文件不存在");
		}
		if(!(file.isFile() && (file.getName().endsWith(EXCEL_XLS) || file.getName().endsWith(EXCEL_XLSX)))){
			throw new Exception("文件不是Excel");
		}
	}

	/**
	 * 读取Excel测试，兼容 Excel 2003/2007/2010
	 * @throws Exception 
	 */
	public static void main(String[] args) throws Exception {
		SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
		BufferedWriter bw = new BufferedWriter(new FileWriter(new File("E:/xxx/InsertSql.txt")));
		try {
			// 同时支持Excel 2003、2007
			File excelFile = new File("E:/xxx.xlsx"); // 创建文件对象
			FileInputStream is = new FileInputStream(excelFile); // 文件流
			checkExcelVaild(excelFile);
			Workbook workbook = getWorkbok(is,excelFile);
			//Workbook workbook = WorkbookFactory.create(is); // 这种方式 Excel2003/2007/2010都是可以处理的

			int sheetCount = workbook.getNumberOfSheets(); // Sheet的数量
			/**
			 * 设置当前excel中sheet的下标：0开始
			 */
			Sheet sheet = workbook.getSheetAt(0);	// 遍历第一个Sheet

			// 为跳过第一行目录设置count
			int count = 0;

		    for (Row row : sheet) {
		    	// 跳过第一行的目录
		    	if(count == 0){
		    		count++;
		    		continue;
		    	}
		    	// 如果当前行没有数据，跳出循环
		    	if(row.getCell(0).toString().equals("")){
	        		return ;
	        	}
		    	String rowValue = "";
		        for (Cell cell : row) {
		        	if(cell.toString() == null){
		        		continue;
		        	}
		        	int cellType = cell.getCellType();
		        	String cellValue = "";
		            switch (cellType) {
		                case Cell.CELL_TYPE_STRING:		// 文本
		                    cellValue = cell.getRichStringCellValue().getString() + "#";
		                    break;
		                case Cell.CELL_TYPE_NUMERIC:	// 数字、日期
		                    if (DateUtil.isCellDateFormatted(cell)) {
		                        cellValue = fmt.format(cell.getDateCellValue()) + "#";
		                    } else {
		                    	cell.setCellType(Cell.CELL_TYPE_STRING);
		                    	cellValue = String.valueOf(cell.getRichStringCellValue().getString()) + "#";
		                    }
		                    break;
		                case Cell.CELL_TYPE_BOOLEAN:	// 布尔型
		                    cellValue = String.valueOf(cell.getBooleanCellValue()) + "#";
		                    break;
		                case Cell.CELL_TYPE_BLANK: // 空白
		                    cellValue = cell.getStringCellValue() + "#";
		                    break;
		                case Cell.CELL_TYPE_ERROR: // 错误
		                    cellValue = "错误#";
		                    break;
		                case Cell.CELL_TYPE_FORMULA:	// 公式
		                    // 得到对应单元格的公式
		                    //cellValue = cell.getCellFormula() + "#";
		                    // 得到对应单元格的字符串
		                    cell.setCellType(Cell.CELL_TYPE_STRING);
		                    cellValue = String.valueOf(cell.getRichStringCellValue().getString()) + "#";
		                    break;
		                default:
		                    cellValue = "#";
		            }
		            //System.out.print(cellValue);
		            rowValue += cellValue;
		        }
		        writeSql(rowValue,bw);
		        System.out.println(rowValue);
		        System.out.println();
		    }
		    bw.flush();
		} catch (Exception e) {
			e.printStackTrace();
		} finally{
			bw.close();
		}
	}
 }

// 将值拼成sql语句
	public static void writeSql(String rowValue,BufferedWriter bw) throws IOException{
		String[] sqlValue = rowValue.split("#");
		String sql = "";
		sql="INSERT INTO table_name (列名1) VALUES("+ sqlValue[0].trim() + ");"+"\n";
		System.out.print(sql);
		try {
			bw.write(sql);
			bw.newLine();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

java poi技术操作excel之写Excel： 点击打开链接

需要使用的Poi jar包下载地址：poi 3.15下载地址