march alex's blog
hello,I am march alex
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运行此程序需要添加一个jar包下载地址
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;



import java.util.StringTokenizer;
 






import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
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.poifs.filesystem.POIFSFileSystem;

 

public class ExcelToFile {
    public static void main(String[] args) throws Exception {
        solve("D:\\input.xls", "D:\\output.txt");
        System.out.println("finished!");
    }
    
    private static String readFile(String filename) throws Exception {
        BufferedReader reader = new BufferedReader(new FileReader(filename));
        String ans = "", line = null;
        while ((line = reader.readLine()) != null) {
            ans += line + "\r\n";
        }
        reader.close();
        return ans;
    }
    
    private static void writeFile(String content, String filename)
            throws Exception {
        BufferedWriter writer = new BufferedWriter(new FileWriter(filename));
        writer.write(content);
        writer.flush();
        writer.close();
    }

    private static void solve(String xls_name, String outfile) throws Exception {

        String ans = "";
        File file = new File(xls_name);
        String[][] result = getData(file, 2);
        int rowLength = result.length;

        for(int i=0;i<rowLength;i++) {   
           for(int j=0;j<result[i].length;j++) {
              ans += result[i][j]+" ";
           }
           ans += "\r\n";
        }
        writeFile(ans, outfile);
    }

    /**
     * 读取Excel的内容,第一维数组存储的是一行中格列的值,二维数组存储的是多少个行
     * 
@param file 读取数据的源Excel
     * 
@param ignoreRows 读取数据忽略的行数,比喻行头不需要读入 忽略的行数为1
     * 
@return 读出的Excel中数据的内容
     * 
@throws FileNotFoundException
     * 
@throws IOException
     
*/

    public static String[][] getData(File file, int ignoreRows)
           throws FileNotFoundException, IOException {
       List<String[]> result = new ArrayList<String[]>();
       int rowSize = 0;
       BufferedInputStream in = new BufferedInputStream(new FileInputStream(
              file));
       // 打开HSSFWorkbook
       POIFSFileSystem fs = new POIFSFileSystem(in);
       HSSFWorkbook wb = new HSSFWorkbook(fs);
       HSSFCell cell = null;
       for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {
           HSSFSheet st = wb.getSheetAt(sheetIndex);
           // 第一行为标题,不取
           for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {
              HSSFRow row = st.getRow(rowIndex);
              if (row == null) {
                  continue;
              }
              int tempRowSize = row.getLastCellNum() + 1;
              if (tempRowSize > rowSize) {
                  rowSize = tempRowSize;
              }
              String[] values = new String[rowSize];
              Arrays.fill(values, "");
              boolean hasValue = false;
              for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) {
                  String value = "";
                  cell = row.getCell(columnIndex);
                  if (cell != null) {
                     // 注意:一定要设成这个,否则可能会出现乱码
                     cell.setEncoding(HSSFCell.ENCODING_UTF_16);
                     switch (cell.getCellType()) {
                     case HSSFCell.CELL_TYPE_STRING:
                         value = cell.getStringCellValue();
                         break;
                     case HSSFCell.CELL_TYPE_NUMERIC:
                         value = String.format("%.2f", cell.getNumericCellValue());
                         if (HSSFDateUtil.isCellDateFormatted(cell)) {
                             Date date = cell.getDateCellValue();
                             if (date != null) {
                                 value = new SimpleDateFormat("yyyy-MM-dd")
                                       .format(date);
                            } else {
                                value = "";
                            }
                         } else {
                            value = new DecimalFormat("0").format(cell
                                   .getNumericCellValue());
                         }
                         break;
                     case HSSFCell.CELL_TYPE_FORMULA:
                         // 导入时如果为公式生成的数据则无值
                         if (!cell.getStringCellValue().equals("")) {
                            value = cell.getStringCellValue();
                         } else {
                            value = cell.getNumericCellValue() + "";
                         }
                         break;
                     case HSSFCell.CELL_TYPE_BLANK:
                         break;
                     case HSSFCell.CELL_TYPE_ERROR:
                         value = "";
                         break;
                     case HSSFCell.CELL_TYPE_BOOLEAN:
                         value = (cell.getBooleanCellValue() == true ? "Y"
                                : "N");
                         break;
                     default:
                         value = "";
                     }
                  }
                  if (columnIndex == 0 && value.trim().equals("")) {
                     break;
                  }
                  values[columnIndex] = value.trim();
                  hasValue = true;
              }
              if (hasValue) {
                  result.add(values);
              }
           }
       }
       in.close();
       String[][] returnArray = new String[result.size()][rowSize];
       for (int i = 0; i < returnArray.length; i++) {
           returnArray[i] = (String[]) result.get(i);
       }
       return returnArray;
    }

}
posted on 2015-04-15 21:57 marchalex 阅读(103) 评论(0)  编辑  收藏 所属分类: java小程序

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