JAVA 를 이용 하여 EXCEL 파일 을 조작 합 니 다.
1 Excel
Java Excel API (.xls), Excel 。 Excel Workbook( : ), :( ExcelReading.java)
import java.io.*;
import jxl.*;
… … … …
try
{
// Workbook , Workbook
// Workbook
// Workbook
InputStream is = new FileInputStream(sourcefile);
jxl.Workbook rwb = Workbook.getWorkbook(is);
}
catch (Exception e)
{
e.printStackTrace();
}
Workbook, Excel Sheet( : )。 :
// Sheet
Sheet rs = rwb.getSheet(0);
Sheet , 。 , 0 , 。
Sheet, Excel Cell( : )。 :
// ,
Cell c00 = rs.getCell(0, 0);
String strc00 = c00.getContents();
// ,
Cell c10 = rs.getCell(1, 0);
String strc10 = c10.getContents();
// ,
Cell c11 = rs.getCell(1, 1);
String strc11 = c11.getContents();
System.out.println("Cell(0, 0)" + " value : " + strc00 + "; type : " + c00.getType());
System.out.println("Cell(1, 0)" + " value : " + strc10 + "; type : " + c10.getType());
System.out.println("Cell(1, 1)" + " value : " + strc11 + "; type : " + c11.getType());
Cell , getContents() , Cell 。 Cell(0, 0) ,Cell(1, 0) ,Cell(1,1) , getContents(), 。
Cell ,API 。 :
String strc00 = null;
double strc10 = 0.00;
Date strc11 = null;
Cell c00 = rs.getCell(0, 0);
Cell c10 = rs.getCell(1, 0);
Cell c11 = rs.getCell(1, 1);
if(c00.getType() == CellType.LABEL)
{
LabelCell labelc00 = (LabelCell)c00;
strc00 = labelc00.getString();
}
if(c10.getType() == CellType.NUMBER)
{
NmberCell numc10 = (NumberCell)c10;
strc10 = numc10.getValue();
}
if(c11.getType() == CellType.DATE)
{
DateCell datec11 = (DateCell)c11;
strc11 = datec11.getDate();
}
System.out.println("Cell(0, 0)" + " value : " + strc00 + "; type : " + c00.getType());
System.out.println("Cell(1, 0)" + " value : " + strc10 + "; type : " + c10.getType());
System.out.println("Cell(1, 1)" + " value : " + strc11 + "; type : " + c11.getType());
Cell , getType() , API , , getXXX(), 。API , Excel , :
, Java Excel API Document。
Excel , close() , , 。 :
// , ,
rwb.close();
Java Excel API Excel , , Java Excel API Document。
Workbook
1. int getNumberOfSheets()
(Workbook) (Sheet) , :
jxl.Workbook rwb = jxl.Workbook.getWorkbook(new File(sourcefile));
int sheets = rwb.getNumberOfSheets();
2. Sheet[] getSheets()
(Workbook) (Sheet) , :
jxl.Workbook rwb = jxl.Workbook.getWorkbook(new File(sourcefile));
Sheet[] sheets = rwb.getSheets();
3. String getVersion()
API , 。
jxl.Workbook rwb = jxl.Workbook.getWorkbook(new File(sourcefile));
String apiVersion = rwb.getVersion();
Sheet
1) String getName()
Sheet , :
jxl.Workbook rwb = jxl.Workbook.getWorkbook(new File(sourcefile));
jxl.Sheet rs = rwb.getSheet(0);
String sheetName = rs.getName();
2) int getColumns()
Sheet , :
jxl.Workbook rwb = jxl.Workbook.getWorkbook(new File(sourcefile));
jxl.Sheet rs = rwb.getSheet(0);
int rsColumns = rs.getColumns();
3) Cell[] getColumn(int column)
, , :
jxl.Workbook rwb = jxl.Workbook.getWorkbook(new File(sourcefile));
jxl.Sheet rs = rwb.getSheet(0);
Cell[] cell = rs.getColumn(0);
4) int getRows()
Sheet , :
jxl.Workbook rwb = jxl.Workbook.getWorkbook(new File(sourcefile));
jxl.Sheet rs = rwb.getSheet(0);
int rsRows = rs.getRows();
5) Cell[] getRow(int row)
, , :
jxl.Workbook rwb = jxl.Workbook.getWorkbook(new File(sourcefile));
jxl.Sheet rs = rwb.getSheet(0);
Cell[] cell = rs.getRow(0);
6) Cell getCell(int column, int row)
, , , , 、 。
jxl.Workbook rwb = jxl.Workbook.getWorkbook(new File(sourcefile));
jxl.Sheet rs = rwb.getSheet(0);
Cell cell = rs.getCell(0, 0);
2 Excel
Excel , ( : , ), 。( ExcelWriting.java)
Excel , Workbook (Workbook) , , API Workbook, WritableWorkbook , WritableWorkbook protected 。 :
import java.io.*;
import jxl.*;
import jxl.write.*;
… … … …
try
{
// Workbook , Workbook
//Method 1: Excel
jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(new File(targetfile));
//Method 2: WritableWorkbook
/*
OutputStream os = new FileOutputStream(targetfile);
jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(os);
*/
}
catch (Exception e)
{
e.printStackTrace();
}
API , , , , , Excel ; Excel , : Web , HTTP , Excel , Excel 。
, , , , , , :
// Excel
jxl.write.WritableSheet ws = wwb.createSheet("Test Sheet 1", 0);
" , , !", API Excel , , :
//1. Label
jxl.write.Label labelC = new jxl.write.Label(0, 0, "This is a Label cell");
ws.addCell(labelC);
// Formatting
jxl.write.WritableFont wf = new jxl.write.WritableFont(WritableFont.TIMES, 18,
WritableFont.BOLD, true);
jxl.write.WritableCellFormat wcfF = new jxl.write.WritableCellFormat(wf);
jxl.write.Label labelCF = new jxl.write.Label(1, 0, "This is a Label Cell", wcfF);
ws.addCell(labelCF);
// Formatting
jxl.write.WritableFont wfc = new jxl.write.WritableFont(WritableFont.ARIAL, 10,
WritableFont.NO_BOLD, false,
UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.RED);
jxl.write.WritableCellFormat wcfFC = new jxl.write.WritableCellFormat(wfc);
jxl.write.Label labelCFC = new jxl.write.Label(1, 0, "This is a Label Cell", wcfFC);
ws.addCell(labelCF);
//2. Number
jxl.write.Number labelN = new jxl.write.Number(0, 1, 3.1415926);
ws.addCell(labelN);
// formatting Number
jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#.##");
jxl.write.WritableCellFormat wcfN = new jxl.write.WritableCellFormat(nf);
jxl.write.Number labelNF = new jxl.write.Number(1, 1, 3.1415926, wcfN);
ws.addCell(labelNF);
//3. Boolean
jxl.write.Boolean labelB = new jxl.write.Boolean(0, 2, false);
ws.addCell(labelB);
//4. DateTime
jxl.write.DateTime labelDT = new jxl.write.DateTime(0, 3, new java.util.Date());
ws.addCell(labelDT);
// formatting DateFormat
jxl.write.DateFormat df = new jxl.write.DateFormat("dd MM yyyy hh:mm:ss");
jxl.write.WritableCellFormat wcfDF = new jxl.write.WritableCellFormat(df);
jxl.write.DateTime labelDTF = new jxl.write.DateTime(1, 3, new java.util.Date(),
wcfDF);
ws.addCell(labelDTF);
。 , , 。 , , 。 , (column, row), 0 , ,A1 (0, 0),B1 (1, 0)。
, Excel , , :
// Exel
wwb.write();
// Excel
wwb.close();
Excel , Excel , write() , , 。 Excel , 。
3 、 Excel
, , Excel , Excel Excel , :( ExcelModifying.java)
// Excel
jxl.Workbook rw = jxl.Workbook.getWorkbook(new File(sourcefile));
// Excel
jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(new File(targetfile), rw);
//
jxl.write.WritableSheet ws = wwb.getSheet(0);
//
jxl.write.WritableCell wc = ws.getWritableCell(0, 0);
// ,
if(wc.getType() == CellType.LABEL)
{
Label l = (Label)wc;
l.setString("The value has been modified.");
}
// Excel
wwb.write();
// Excel
wwb.close();
// Excel
rw.close();
Excel , , API 。 , , , , : 、 , , , , 。 , , , , 。
, , API add() , , setXXX() , 。
, , 。
, , , 2 。
, write() , , , , , 。
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