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