package demo.dcn.vo;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.CellFormat;
import jxl.format.Colour;
import jxl.read.biff.BiffException;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
public class Excel {
/**
* @param args
* Excel read and write program
* @throws IOException
* @throws BiffException
*/
public static void main(String[] args) throws BiffException, IOException {
writeExcel();
readExcel();
}
public static void readExcel() throws BiffException, IOException{
List list = new ArrayList();
Workbook rwb =null;
Cell cell = null;
InputStream stream = new FileInputStream("E:\\xml\\x.xls");//Create an output stream
rwb = Workbook.getWorkbook(stream); //Get the Excel file object
Sheet sheet = rwb.getSheet(0);//Get the default first sheet of the specified sheet of the file
for(int i=0;i<sheet.getRows();i++){//Number of rows (the directory of the table header is not required, starting from 1
String[] str = new String[sheet.getColumns()]; //Create an array to store the value of each column
for(int k=0;k<sheet.getColumns();k++){
//Get the value of row i, column k
cell = sheet.getCell(k,i);
str[k] = cell.getContents();
/ / Store the column just obtained into the list
list.add(str);
}
}
for(int i=0;i<list.size();i++){
String[] str = (String[])list.get(i);
for(int j=0;j<str.length;j++){
System.out.println(str[j]);
}
}
}
/**
* Write excel file
*/
public static void writeExcel(){
String[] title = {"Number","Product Name","Product Price","Product Quantity","Production Date","Origin","Export or not"};
try{
long start = System.currentTimeMillis(); // get start time
String filePath = "d:\\testJXL.xls"; // The path of the output excel
WritableWorkbook wwb; // Create an Excel workbook
OutputStream os = new FileOutputStream(filePath);
wwb=Workbook.createWorkbook(os); // Create a new jxl file, that is, generate testJXL.xls under the d drive
WritableSheet sheet = wwb.createSheet("Product List", 0); // Add the first sheet and set the name of the first Sheet
Label label;
for(int i=0;i<title.length;i++){
// Label(x,y,z) represents the x+1 column of the cell, the y+1 row, the content z
// Indicate the location and content of the cell in the child object of the Label object
label = new Label(i,0,title[i]);
label = new Label(i, 0, title[i], getHeader());
// Add the defined cells to the worksheet
sheet.addCell(label);
}
//below is the fill data
/*
* To save numbers to cells, you need to use jxl.write.Number
* must use its full path, otherwise an error will occur
* */
// populate the product number
jxl.write.Number number = new jxl.write.Number(0,1,20071001);
sheet.addCell(number);
// fill in the product name
label = new Label(1,1,"Golden Pigeon Seeds");
sheet.addCell(label);
/*
* Define a common format for displaying amounts
* jxl will automatically implement rounding
* For example 2.456 will be formatted as 2.46, 2.454 will be formatted as 2.45
* */
jxl.write.NumberFormat nf = new jxl.write.NumberFormat("#,###.00");
jxl.write.WritableCellFormat wcf = new jxl.write.WritableCellFormat (nf);
// populate the product price
jxl.write.Number nb = new jxl.write.Number(2,1,200000.45,wcf);
sheet.addCell(nb);
// populate the product quantity
jxl.write.Number numb = new jxl.write.Number(3,1,200);
sheet.addCell(numb);
/*
* Define the public format for displaying dates
* Such as: yyyy-MM-dd hh:mm
* */
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String newdate = sdf.format(new java.util.Date());
// fill in the production date
label = new Label(4,1,newdate);
sheet.addCell(label);
// populate the origin
label = new Label(5,1,"Shaanxi Xi'an");
sheet.addCell(label);
/*
* show boolean value
* */
jxl.write.Boolean bool = new jxl.write.Boolean (6.1, true);
sheet.addCell(bool);
/*
* Merge Cells
* Implemented by writablesheet.mergeCells(int x, int y, int m, int n);
* means merge from column x+1, row y+1 to column m+1, row n+1
*
* */
sheet.mergeCells(0,3,2,3);
label = new Label(0,3,"Merged three cells");
sheet.addCell(label);
/*
*
* Define public font format
* Use as a template by getting the style of a font
* First get the first sheet through web.getSheet(0)
* Then get the second column of the first sheet, the first row is the font of "product name"
* */
CellFormat cf = wwb.getSheet (0) .getCell (1, 0) .getCellFormat ();
WritableCellFormat wc = new WritableCellFormat();
// set center
wc.setAlignment (Alignment.CENTRE);
// set border line
wc.setBorder(Border.ALL, BorderLineStyle.THIN);
// set the background color of the cell
wc.setBackground(jxl.format.Colour.RED);
label = new Label(1,5,"字体",wc);
sheet.addCell(label);
// set font
jxl.write.WritableFont wfont = new jxl.write.WritableFont(WritableFont.createFont("隶书"),20);
WritableCellFormat font = new WritableCellFormat(wfont);
label = new Label(2,6,"Lishu",font);
sheet.addCell(label);
// data input
wwb.write();
// close the file
wwb.close();
long end = System.currentTimeMillis();
System.out.println("----The time taken to complete this operation is: "+(end-start)/1000);
}catch(Exception e){
System.out.println("---An exception occurred---");
e.printStackTrace ();
}
}
/**
* Set the style of the header
* @return
*/
public static WritableCellFormat getHeader(){
WritableFont font = new WritableFont(WritableFont.TIMES, 10 ,WritableFont.BOLD);//Define the font
try {
font.setColour(Colour.BLUE);//Blue font
} catch (WriteException e1) {
// TODO automatically generates catch block
e1.printStackTrace();
}
WritableCellFormat format = new WritableCellFormat(font);
try {
format.setAlignment (jxl.format.Alignment.CENTRE); // 左右 居中
format.setVerticalAlignment (jxl.format.VerticalAlignment.CENTRE); // 上下 居中
format.setBorder(Border.ALL,BorderLineStyle.THIN,Colour.BLACK);//Black border
format.setBackground(Colour.YELLOW);//Yellow background
} catch (WriteException e) {
// TODO automatically generates catch block
e.printStackTrace ();
}
return format;
}
}
public static boolean writeExcel(OutputStream os, List<String> columns, List<Map<String, Object>> objData) {
// Create an Excel workbook that can be written (by default, the generated file is under tomcat/bin)
WritableWorkbook wwb=null;
try {
wwb=Workbook.createWorkbook(os);
WritableSheet sheet=wwb.createSheet("First Sheet", 0);
// start writing the first line (ie the title bar)
for(int i=0; i < columns.size(); i++) {
// used to write text content to the worksheet
Label label=null;
// Specify the cell position in the construction of the Label object (parameters represent the number of columns, rows, and content in turn)
label=new Label(i, 0, columns.get(i));
// Add the defined cells to the worksheet
sheet.addCell(label);
}
// Loop through the data in the table
if(objData.isEmpty()) {
return false;
} else {
for(int i=0; i < objData.size(); i++) {
// Convert to map collection {activyName: test function, count: 2}
Map<String, Object> map=(Map<String, Object>)objData.get(i);
// Loop through the subset in the output map: both column values
for(int j=0;j<columns.size();j++){
for(Map.Entry<String, Object> entry : map.entrySet()) {
// ps: Because the ""general"" export function is required, the loop here is not get("Name"), but through map.get(o)
if(entry.getKey()==columns.get(j)){
sheet.addCell(new Label(j, i + 1, String.valueOf(entry.getValue())));
}
}
}
}
}
// data input
wwb.write();
// close the file
wwb.close();
// close the output stream
os.close();
} catch(Exception e) {
e.printStackTrace ();
return false;
}
return true;
}
/**
* Download the file to the client, and the download box will pop up.
* @param response(HttpServletResponse)
* @param file (the file to be downloaded)
* @param isDel (whether to delete the file after the download is complete)
* @throws IOException
*/
public static void exportFile(HttpServletResponse response, File file, boolean isDel) {
OutputStream out=null;
InputStream in=null;
try {
// get the filename
String filename=URLEncoder.encode(file.getName(), "UTF-8");
// define the output type (download)
response.setContentType("application/force-download");
response.setHeader("Location", filename);
// define the output file header
response.setHeader("Content-Disposition", "attachment;filename=" + filename);
out=response.getOutputStream();
in=new FileInputStream(file.getPath());
byte[] buffer=new byte[1024];
int i=-1;
while((i=in.read(buffer)) != -1) {
out.write(buffer, 0, i);
}
in.close();
out.close();
} catch(Exception e) {
e.printStackTrace ();
}
if(isDel) {
// Delete the file, close all Streams before deleting.
file.delete();
}
}
/**
* Create filename and temp file
* @throws IOException
*/
public static File createFile(String name) {
// create the current day
Date date=new Date();
// format the date
SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMdd");
// format date (generate filename)
String filename=sdf.format(date);
// Create a file
File f=new File(name + filename + ".xls");
try {
f.createNewFile();
} catch(IOException e) {
e.printStackTrace ();
}
return f;
}
jxl
Java to generate and manipulate Excel files
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