Download addresshttp ://download.csdn.net/detail/u010634066/8302683Download directly
First download the poi package and jxl package
Read part:
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
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 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;
/**============================================================
* Copyright:
* Bag:
* Modification record:
* Date author content
* =============================================================
* 2014-12-25 shirenchuang
* ============================================================*/
/**
* @author shirenchuang
*
*/
public class ReadExecl {
/*private String fileUrl;
public ReadExecl(String fileUrl) {
// TODO Auto-generated constructor stub
this.fileUrl = fileUrl;
}*/
// File file = new File(fileUrl);
/**
* Read the content of Excel, the first-dimensional array stores the value of the column in a row, and the two-dimensional array stores how many rows
* @param file read data source Excel
* @param ignoreRows The number of rows to ignore when reading data, metaphor that the number of rows that do not need to be read in the row header is 1
* @return the content of the data in Excel read out
* @throws FileNotFoundException
* @throws IOException
*/
public static List<String[][]> getData(File file,int ignoreRows) throws IOException{
//return the data of all worksheets
List<String[][]> result = new ArrayList<String[][]>();
BufferedInputStream in = new BufferedInputStream(new FileInputStream(file));
POIFSFileSystem fs = new POIFSFileSystem(in);
HSSFWorkbook wb = new HSSFWorkbook(fs);
HSSFCell cell = null;
wb.getNumberOfSheets();
// multiple worksheets
for(int i=0;i<wb.getNumberOfSheets();i++){
// get worksheet
HSSFSheet hf = wb.getSheetAt(i);
//The data of a worksheet is squeezed to add 1. For example, execl plus the column name of the first row is a total of 66, but getLastRowNum() is 65, and the list is also counted
String[][] rowResult = new String[hf.getLastRowNum()+1][7];
//Multiple rows per sheet
for(int rownumber = ignoreRows; rownumber<=hf.getLastRowNum();rownumber++){
//The number of rows of the obtained row is uncertain. If there is a space after that row, the space column may be ignored
HSSFRow row = hf.getRow(rownumber);
if (row == null) {
continue;
}
// data for one row
String[] colResult = new String[row.getLastCellNum()];
// get multiple columns of a row
/**
* There is a problem here that row.getLastCellNum() is inaccurate in some cases
* Example: EXECL has a total of 7 columns of data but in fact some of the last few columns are empty, it will not count the empty columns into the column value by default;
* The error caused is that the column value that will be useful when you call the write method will be wrong;
*
*/
for(short colnumber = 0;colnumber<row.getLastCellNum();colnumber++){
String value="";
cell=row.getCell(colnumber);
//replace the cell type
if(cell!=null){
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
switch(cell.getCellType()){
case HSSFCell.CELL_TYPE_STRING:
value = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_NUMERIC:
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:
// No value if the data is generated for the formula when importing
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 = "";
}//switch
}//if
if (colnumber == 0 && value.trim().equals("")) {
// break;
}
colResult[colnumber]=rightTrim(value);
}//for()列
rowResult[rownumber]=colResult;
}//for() 行
if(rowResult!=null)
result.add(rowResult);
}//for worksheet
in.close();
return result;
}
/**
* remove spaces from the right of the string
* @param str String to process
* @return the processed string
*/
public static String rightTrim(String str) {
if (str == null) {
return "";
}
int length = str.length();
for (int i = length - 1; i >= 0; i--) {
if (str.charAt(i) != 0x20) {
break;
}
length--;
}
return str.substring(0, length);
}
}
write section
import java.io.File;
import java.io.IOException;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
/**============================================================
* Copyright: Yuanheng Communication Copyright (c) 2002 - 2012
* Bag:
* Modification record:
* Date author content
* =============================================================
* 2014-12-25 shirenchuang
* ============================================================*/
/**
* @author shirenchuang
*
*/
public class WriterExecl {
private static String writeUrl ="";
public String getWriteUrl() {
return writeUrl;
}
public void setWriteUrl(String writeUrl) {
this.writeUrl = writeUrl;
}
public WriterExecl(String writeUrl ) {
// TODO Auto-generated constructor stub
this.writeUrl= writeUrl;
}
/**
*
* This is simply writing an EXCEL table
* **/
public static void writeEx(int row,String[][] data){
WritableWorkbook wwb = null;
Label label = null;
String file =writeUrl;
try {
// Create a writable workbook object
wwb = Workbook.createWorkbook(new File(file));
if (wwb != null) {
// Create a writable worksheet in the workbook, the first parameter is the worksheet name, and the second parameter is the location of the worksheet
WritableSheet ws = wwb.createSheet("test", 0);
if (ws != null) {
/* add table structure */
// Row
for (int i=0;i<row;i++) {
// List
for (int j=0;j<data[i].length;j++) {
// There are three parameters in the Label constructor, the first is the column, the second is the row, and the third is the content of the cell filled
label = new Label(j, i,data[i][j] );
// Add the cell where the data is written to the worksheet
ws.addCell(label);
}
}
// write to file from memory
wwb.write();
}
System.out.println("The path is: " + file + " the workbook write data successfully!");
}
} catch (Exception e) {
System.out.println(e.getMessage());
} finally {
try {
wwb.close();
} catch (WriteException e) {
// TODO Auto-generated catch block
e.printStackTrace ();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace ();
}
}
}
}
Main method:
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class main {
public static void main(String[] args) throws IOException{
ReadExecl re = new ReadExecl();
File file = new File("C:/Users/Administrator/Desktop/test.xls");
WriterExecl we = new WriterExecl("C:/Users/Administrator/Desktop/Quzhou User Table.xls");
List<String[][]> result = new ArrayList<String[][]>();
// do not ignore lines starting at 0
result = re.getData(file, 0);
// how many lines are there
int row = result.get(0).length;
//Writing the incoming parameter row without passing the column column is uncertain
we.writeEx(row,result.get(0));
}
}