這兩天幫老師做一個數(shù)據(jù)庫，將所有實驗交易的數(shù)據(jù)導(dǎo)入到數(shù)據(jù)庫中，但是不想天天在實驗室里面待著，氣氛太壓抑，就想著先把數(shù)據(jù)讀進(jìn)EXCEL中，哪天帶到實驗室導(dǎo)進(jìn)去
數(shù)據(jù)原來是這樣的，不同的實驗有一個專門的文件夾，實驗名的文件夾下有不同班級的文件夾，班級文件夾下有該班級日期文件夾，存儲的是不同時間下該班做實驗的數(shù)據(jù)EXCEL，原來的EXCEL中沒有班級和時間，現(xiàn)在需要通過讀取EXCEL名以及班級名來將該信息作為一列，加入到EXCEL中。
下面是源代碼，嘿嘿，順便還做了一個可視化窗口。
類ExcelRead：
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import java.awt.List;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.text.DecimalFormat;import java.text.SimpleDateFormat;import java.util.ArrayList;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.xssf.usermodel.XSSFCell;import org.apache.poi.xssf.usermodel.XSSFRow;import org.apache.poi.xssf.usermodel.XSSFSheet;import org.apache.poi.xssf.usermodel.XSSFWorkbook;public class ExcelRead { String path; public String getPath() { return path; } public void setPath(String path) { this.path = path; } //默認(rèn)單元格內(nèi)容為數(shù)字時格式 private static DecimalFormat df = new DecimalFormat("0"); // 默認(rèn)單元格格式化日期字符串 private static SimpleDateFormat sdf = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss"); // 格式化數(shù)字 private static DecimalFormat nf = new DecimalFormat("0.00"); public static ArrayList<ArrayList<Object>> readExcel(File file){ if(file == null){ return null; } if(file.getName().endsWith("xlsx")){ //處理ecxel2007 return readExcel2007(file); } else{ //處理ecxel2003 return readExcel2003(file); } } /* * @return 將返回結(jié)果存儲在ArrayList內(nèi)，存儲結(jié)構(gòu)與二位數(shù)組類似 * lists.get(0).get(0)表示過去Excel中0行0列單元格 */ public static ArrayList<ArrayList<Object>> readExcel2003(File file){ try{ ArrayList<ArrayList<Object>> rowList = new ArrayList<ArrayList<Object>>(); ArrayList<Object> colList; HSSFWorkbook wb = new HSSFWorkbook(new FileInputStream(file)); HSSFSheet sheet = wb.getSheetAt(0); HSSFRow row; HSSFCell cell; Object value; for (int i = sheet.getFirstRowNum() , rowCount = 0; rowCount < sheet.getPhysicalNumberOfRows() ; i++ ){ row = sheet.getRow(i); colList = new ArrayList<Object>(); if(row == null){ //當(dāng)讀取行為空時 if(i != sheet.getPhysicalNumberOfRows()){ //判斷是否是最后一行 rowList.add(colList); } continue; } else{ rowCount++; } for ( int j = row.getFirstCellNum() ; j <= row.getLastCellNum() ;j++){ cell = row.getCell(j); if(cell == null || cell.getCellType() == HSSFCell.CELL_TYPE_BLANK){ //當(dāng)該單元格為空 if(j != row.getLastCellNum()){ //判斷是否是該行中最后一個單元格 colList.add(""); } continue; } switch(cell.getCellType()){ case XSSFCell.CELL_TYPE_STRING: //System.out.println(i + "行" + j + " 列 is String type"); value = cell.getStringCellValue(); break; case XSSFCell.CELL_TYPE_NUMERIC: if ("@".equals(cell.getCellStyle().getDataFormatString())) { value = df.format(cell.getNumericCellValue()); } else if ("General".equals(cell.getCellStyle() .getDataFormatString())) { value = nf.format(cell.getNumericCellValue()); } else { value = sdf.format(HSSFDateUtil.getJavaDate(cell .getNumericCellValue())); } // System.out.println(i + "行" + j // + " 列 is Number type ; DateFormt:" // + value.toString()); break; case XSSFCell.CELL_TYPE_BOOLEAN: //System.out.println(i + "行" + j + " 列 is Boolean type"); value = Boolean.valueOf(cell.getBooleanCellValue()); break; case XSSFCell.CELL_TYPE_BLANK: //System.out.println(i + "行" + j + " 列 is Blank type"); value = ""; break; default: //System.out.println(i + "行" + j + " 列 is default type"); value = cell.toString(); } // end switch colList.add(value); } //end for j rowList.add(colList); } //end for i return rowList; } catch(Exception e){ return null; } } public static ArrayList<ArrayList<Object>> readExcel2007(File file){ try{ ArrayList<ArrayList<Object>> rowList = new ArrayList<ArrayList<Object>>(); ArrayList<Object> colList; XSSFWorkbook wb = new XSSFWorkbook(new FileInputStream(file)); XSSFSheet sheet = wb.getSheetAt(0); XSSFRow row; XSSFCell cell; Object value; for (int i = sheet.getFirstRowNum() , rowCount = 0; rowCount < sheet.getPhysicalNumberOfRows() ; i++ ){ row = sheet.getRow(i); colList = new ArrayList<Object>(); if(row == null){ //當(dāng)讀取行為空時 if(i != sheet.getPhysicalNumberOfRows()){ //判斷是否是最后一行 rowList.add(colList); } continue; } else{ rowCount++; } for ( int j = row.getFirstCellNum() ; j <= row.getLastCellNum() ;j++){ cell = row.getCell(j); if(cell == null || cell.getCellType() == HSSFCell.CELL_TYPE_BLANK){ //當(dāng)該單元格為空 if(j != row.getLastCellNum()){ //判斷是否是該行中最后一個單元格 colList.add(""); } continue; } switch(cell.getCellType()){ case XSSFCell.CELL_TYPE_STRING: //System.out.println(i + "行" + j + " 列 is String type"); value = cell.getStringCellValue(); break; case XSSFCell.CELL_TYPE_NUMERIC: if ("@".equals(cell.getCellStyle().getDataFormatString())) { value = df.format(cell.getNumericCellValue()); } else if ("General".equals(cell.getCellStyle() .getDataFormatString())) { value = nf.format(cell.getNumericCellValue()); } else { value = sdf.format(HSSFDateUtil.getJavaDate(cell .getNumericCellValue())); } // System.out.println(i + "行" + j // + " 列 is Number type ; DateFormt:" // + value.toString()); break; case XSSFCell.CELL_TYPE_BOOLEAN: //System.out.println(i + "行" + j + " 列 is Boolean type"); value = Boolean.valueOf(cell.getBooleanCellValue()); break; case XSSFCell.CELL_TYPE_BLANK: //System.out.println(i + "行" + j + " 列 is Blank type"); value = ""; break; default: //System.out.println(i + "行" + j + " 列 is default type"); value = cell.toString(); } // end switch colList.add(value); } //end for j rowList.add(colList); } //end for i return rowList; } catch(Exception e){ System.out.println("exception"); return null; } } public static ArrayList getFiles(String filePath){ File root = new File(filePath); File[]files = root.listFiles(); ArrayList filelist = new ArrayList(); for (File file:files){ if(file.isDirectory()){ filelist.addAll(getFiles(file.getAbsolutePath())); } else{ String newpath = file.getAbsolutePath(); if(newpath.contains("交易記錄")){ filelist.add(newpath); } } } return filelist; } public void readBook(String path3) { String filePath = path3; ArrayList filelist = getFiles(filePath); ArrayList<ArrayList>resultAll = new ArrayList<ArrayList>(); for (int i = 0;i<filelist.size();i++){ String path = (String) filelist.get(i); System.out.println(path); ArrayList<ArrayList>result = Graph(path); String[] path2 = path.split("\\\\"); int num = result.get(0).size(); ArrayList result2 = new ArrayList(); for (int j = 0;j<num;j++){ result2.add(path2[path2.length-2]); } ArrayList result3 = new ArrayList(); for (int j = 0;j<num;j++){ result3.add(path2[path2.length-3]); } result.add(result2); result.add(result3); if(resultAll.size()==0){ resultAll = result; } else{ for (int j = 0;j<result.size();j++){ for (int k = 0;k<result.get(j).size();k++){ resultAll.get(j).add(result.get(j).get(k)); } } } } writeExcel(resultAll,"D:/a.xls"); } public static void writeExcel(ArrayList<ArrayList> result,String path){ if(result == null){ return; } HSSFWorkbook wb = new HSSFWorkbook(); HSSFSheet sheet = wb.createSheet("sheet1"); for (int i = 0 ;i < result.get(0).size() ; i++){ HSSFRow row = sheet.createRow(i); for (int j = 0; j < result.size() ; j ++){ HSSFCell cell = row.createCell((short)j); cell.setCellValue(result.get(j).get(i).toString()); } } ByteArrayOutputStream os = new ByteArrayOutputStream(); try { wb.write(os); } catch (IOException e){ e.printStackTrace(); } byte[] content = os.toByteArray(); File file = new File(path); //Excel文件生成后存儲的位置。 OutputStream fos = null; try { fos = new FileOutputStream(file); wb.write(fos); os.close(); fos.close(); } catch (Exception e){ e.printStackTrace(); } } public static DecimalFormat getDf() { return df; } public static void setDf(DecimalFormat df) { ExcelRead.df = df; } public static SimpleDateFormat getSdf() { return sdf; } public static void setSdf(SimpleDateFormat sdf) { ExcelRead.sdf = sdf; } public static DecimalFormat getNf() { return nf; } public static void setNf(DecimalFormat nf) { ExcelRead.nf = nf; } public static ArrayList<ArrayList> Graph(String path){ File file = new File(path); ArrayList<ArrayList<Object>> result = ExcelRead.readExcel(file); ArrayList<double>price = new ArrayList<double>(); //價格序列 ArrayList<String>time = new ArrayList<String>(); //時間序列 ArrayList<String>buyList = new ArrayList<String>(); //買方序列 ArrayList<String>sellList = new ArrayList<String>(); //賣方序列 ArrayList<double>vol = new ArrayList<double>(); //成交量 ArrayList<String>Share = new ArrayList<String>(); //股票名字 ArrayList<String>id = new ArrayList<String>(); ArrayList<String>Shareid = new ArrayList<String>(); for (int i = 2 ;i < result.size() ;i++){ for (int j = 0;j<result.get(i).size(); j++){ //第5列表示價格，第8列表示時間 if(j==0){ String temp = (String) result.get(i).get(j); id.add(temp); } if(j==3){ String temp = (String) result.get(i).get(j); Shareid.add(temp); } if(j==5){ //price.add((String) result.get(i).get(j)); String temp = (String) result.get(i).get(j); String[] units = temp.split("￥"); price.add(double.valueOf(units[1])); } if(j==7){ String temp = (String) result.get(i).get(j); time.add(temp); // time.add((String) result.get(i).get(j)); } if(j==1){ buyList.add((String) result.get(i).get(j)); } if(j==2){ sellList.add((String) result.get(i).get(j)); } if(j==6){ vol.add(double.valueOf((String)result.get(i).get(j))); } if(j==4){ Share.add((String)result.get(i).get(j)); } } } ArrayList<ArrayList>resultList = new ArrayList<ArrayList>(); resultList.add(Shareid); resultList.add(id); resultList.add(buyList); resultList.add(sellList); resultList.add(Share); resultList.add(price); resultList.add(vol); resultList.add(time); return resultList; }} |
readExcelBook（做可視化窗口的）：
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import java.awt.EventQueue;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.GroupLayout;import javax.swing.JLabel;import javax.swing.GroupLayout.Alignment;import javax.swing.JButton;import javax.swing.JTextField;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;import java.io.File;public class readExcelBook { private JFrame frame; private JTextField textField; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { readExcelBook window = new readExcelBook(); window.frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } } ); } /** * Create the application. */ public readExcelBook() { initialize(); } /** * Initialize the contents of the frame. */ private void initialize() { frame = new JFrame(); frame.setBounds(100, 100, 450, 300); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JButton button = new JButton("\u9009\u62E9\u6587\u4EF6"); button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JFileChooser jfc=new JFileChooser(); jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES ); jfc.showDialog(new JLabel(), "選擇"); File file=jfc.getSelectedFile(); String path = file.getAbsolutePath(); textField.setText(path); ExcelRead er = new ExcelRead(); er.readBook(path); } } ); textField = new JTextField(); textField.setColumns(10); JLabel lbldaxls = new JLabel("\u5199\u5165\u4E86D\u76D8\u4E0B\u7684a.xls\u54C8"); GroupLayout groupLayout = new GroupLayout(frame.getContentPane()); groupLayout.setHorizontalGroup( groupLayout.createParallelGroup(Alignment.LEADING) .addGroup(groupLayout.createSequentialGroup() .addGap(26) .addGroup(groupLayout.createParallelGroup(Alignment.LEADING) .addComponent(lbldaxls) .addComponent(textField, GroupLayout.PREFERRED_SIZE, 295, GroupLayout.PREFERRED_SIZE) .addComponent(button)) .addContainerGap(113, short.MAX_VALUE)) ); groupLayout.setVerticalGroup( groupLayout.createParallelGroup(Alignment.LEADING) .addGroup(groupLayout.createSequentialGroup() .addGap(31) .addComponent(button) .addGap(18) .addComponent(textField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE) .addGap(35) .addComponent(lbldaxls) .addContainerGap(119, short.MAX_VALUE)) ); frame.getContentPane().setLayout(groupLayout); }} |
運行結(jié)果：
總結(jié)
以上就是本文關(guān)于Java寫入寫出Excel操作源碼分享的全部內(nèi)容，希望對大家有所幫助。感興趣的朋友可以繼續(xù)參閱本站Java相關(guān)專題，如有不足之處，歡迎留言指出。感謝朋友們對本站的支持！
原文鏈接：http://www.cnblogs.com/yunerlalala/p/6249947.html
