使用Java读取xlxs文件和写入txt文件,并将数据写入到本地文件

小编今天要给大家分享的是从xlxs文件中将数据读取出来，并将数据写入到本地txt文件中。
那么为啥有这个分享呢，来看看背景介绍：
背景：在实际开发中，通常会用到使用xlxs来提取业务的需求，同时在xlxs文件中会有大量的数据用于业务开发的使用中，应趋势所取，便有了现在这个分享。
好了，一起走进小编的代码，一个简单的小应用，解决手动导入的麻烦.
我要从xlxs中将数据取出，并将数据存放到有一定格式的txt文件中，

从xlxs文件中将数据取出，作为IT人员不能手动弄吧，这也太对不起自己的专业了吧，O(∩_∩)O哈哈~
使用代码之前，小编用的是idea maven项目，当然要用pom文件，所需maven-pom文件，下载地址：

http://download.csdn.net/download/demon_ll/10016057

代码所示
读取xlsx文件：

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

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.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
/**
 * excel读写工具类 */
public class POIUtils {
    private static Logger logger  = Logger.getLogger(POIUtil.class);
    private final static String xls = "xls";
    private final static String xlsx = "xlsx";

    /**
     * 读入excel文件，解析后返回 
     * @param file
     * @throws IOException
     */
    public static List<String[]> readExcel(String file) throws IOException{
        checkFile(file);
        Workbook workbook = getWorkBook(file);
        List<String[]> list = new ArrayList<String[]>();
        if(workbook != null){
            for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){
                Sheet sheet = workbook.getSheetAt(sheetNum);
                if(sheet == null){
                    continue;
                }
                int firstRowNum  = sheet.getFirstRowNum();
                int lastRowNum = sheet.getLastRowNum();
                for(int rowNum = firstRowNum+1;rowNum <= lastRowNum;rowNum++){
                    Row row = sheet.getRow(rowNum);
                    if(row == null){
                        continue;
                    }
                    int firstCellNum = row.getFirstCellNum();
                    int lastCellNum = row.getPhysicalNumberOfCells();
                    String[] cells = new String[row.getPhysicalNumberOfCells()];
                    for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
                        Cell cell = row.getCell(cellNum);
                        cells[cellNum] = getCellValue(cell);
                    }
                    list.add(cells);
                }
            }
            workbook.close();
        }
        return list;
    }
    public static void checkFile(String file) throws IOException{
        if(null == file){
            logger.error("文件不存在！");
            throw new FileNotFoundException("文件不存在！");
        }
        String fileName = file;
        if(!fileName.endsWith(xls) && !fileName.endsWith(xlsx)){
            logger.error(fileName + "不是excel文件");
            throw new IOException(fileName + "不是excel文件");
        }
    }
    public static Workbook getWorkBook(String file) {
        String fileName = file;
        Workbook workbook = null;
        try {
            InputStream is = new FileInputStream(file);
            if(fileName.endsWith(xls)){
                workbook = new HSSFWorkbook(is);
            }else if(fileName.endsWith(xlsx)){
                workbook = new XSSFWorkbook(is);
            }
        } catch (IOException e) {
            logger.info(e.getMessage());
        }
        return workbook;
    }
    public static String getCellValue(Cell cell){
        String cellValue = "";
        if(cell == null){
            return cellValue;
        }
        if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){
            cell.setCellType(Cell.CELL_TYPE_STRING);
        }
        switch (cell.getCellType()){
            case Cell.CELL_TYPE_NUMERIC: //数字  
                cellValue = String.valueOf(cell.getNumericCellValue());
                break;
            case Cell.CELL_TYPE_STRING: //字符串  
                cellValue = String.valueOf(cell.getStringCellValue());
                break;
            case Cell.CELL_TYPE_BOOLEAN: //Boolean  
                cellValue = String.valueOf(cell.getBooleanCellValue());
                break;
            case Cell.CELL_TYPE_FORMULA: //公式  
                cellValue = String.valueOf(cell.getCellFormula());
                break;
            case Cell.CELL_TYPE_BLANK: //空值   
                cellValue = "";
                break;
            case Cell.CELL_TYPE_ERROR: //故障  
                cellValue = "非法字符";
                break;
            default:
                cellValue = "未知类型";
                break;
        }
        return cellValue;
    }
}

/**
 * Created by Administrator on 2017/10/11.
 */
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.List;

public class ReadXlsx {
    public static void main(String[] args){
        try {
            //本地绝对路径
            String readFile = "D:/zling/users.xlsx";
            String writeFile="D:/zling/textFile.txt";
            List<String[]> userList = POIUtil.readExcel(readFile);
            String outfiles="";
            for (int i = 0; i < userList.size(); i++) {
                String[] users = userList.get(i);
                //users[1]为第二列
                outfiles+="<ids id=\""+users[1]+"\">\n" +
                        "          <properities>\n" +
                        "\t\t\t<name>\n" +
                        "\t\t\t\tname\n" +
                        "\t\t\t</name>\n" +
                        "            <type>\n" +
                        "\t\t\t\tKeyword_contain\n" +
                        "\t\t\t</type>\n" +
                        "            <value>\n" +
                        "\t\t\t\t"+users[4]+"\n" +
                        "\t\t\t</value>\n" +
                        "\t\t  </properities>\n" +
                        "         <properities>\n" +
                        "\t\t\t<name>\n" +
                        "\t\t\t\tyear\n" +
                        "\t\t\t</name>\n" +
                        "            <type>\n" +
                        "\t\t\t\tvalue_scope\n" +
                        "\t\t\t</type>\n" +
                        "            <value>\n" +
                        "\t\t\t\t‘2017-09-00’,’2017-10-00’\n" +
                        "\t\t\t</value>\n" +
                        "\t\t  </properities>\n" +
                        "\t\t</ids>";

            }
            /* 写入Txt文件 */
            File writename = new File(writeFile); // 相对路径，如果没有则要建立一个新的output。txt文件
            writename.createNewFile(); // 创建新文件
            BufferedWriter out = new BufferedWriter(new FileWriter(writename));
            out.write(outfiles); // \r\n即为换行
            out.flush(); // 把缓存区内容压入文件
            out.close(); // 最后记得关闭文件
            System.out.print("保存文件成功");
        } catch (IOException e) {
           System.out.print("异常");
        }
    }
}

这样就ok了，很容易。

小编所分享的到此结束了