Parth Patil Parth Patil - 3 months ago 19
Java Question

create a table to insert the crawled data stored in array list in a excel using java

Its been a while i m trying to create a excel sheet to store the crawled data in a table format in a excel , the data is fetched from a url and stored in a array list , this data is needed to be stored in a array list `

import java.util.ArrayList;

import com.webscrap4j.WebScrap;
import com.webscrap4j.WebScrapException;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Scanner;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
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.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CreationHelper;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.xssf.usermodel.XSSFTable;


public class crawl
{
public static void main(String[] args) throws IOException {



ArrayList<String> al = new ArrayList<String>();
ArrayList<String> bl = new ArrayList<String>();
ArrayList<String> cl = new ArrayList<String>();
WebScrap ws = new WebScrap();

ws.setUrl("https://www.pepperfry.com/hardware-electricals-power-storage-ups-inverters.html");
try


{

ws.startWebScrap();
//al = ws.getImageTagData("img", "title");
al = ws.getSingleHTMLScriptData("<div class='card-body-title hidden-txt'>", "</div>");
bl = ws.getSingleHTMLScriptData("<span class='strike'>", "</span>");
cl = ws.getSingleHTMLScriptData("<p class='card-body-price txt-red'>", "</p>");




/* FileOutputStream fos=new FileOutputStream("/Users/parthpatil/Documents/11.xls");
HSSFWorkbook workBook = new HSSFWorkbook();

HSSFSheet Sheet = workBook.createSheet("products");
//XSSFTable my_table = Sheet.createTable();
HSSFRow row;
HSSFCell cell;
CreationHelper helper = workBook.getCreationHelper();


Row header = Sheet.createRow(0);
header.createCell(0).setCellValue("Product Name");
header.createCell(1).setCellValue("Product Price");
header.createCell(2).setCellValue("Product MRP");



for(int i=0;i<al.size();i++){
row = Sheet.createRow((short) i);
cell = row.createCell(i);
System.out.println(al.get(i));
cell.setCellValue(al.get(i).toString());
}
System.out.println("Done");
workBook.write(fos);

*/

for (String adata : al)
{

System.out.println("the product are:- " + adata);

}
for (String bdata : bl)
{

System.out.println("the MRp are:- " + bdata);

}
for (String cdata : cl)
{

System.out.println("the selling price is:- " + cdata);

}

} catch (WebScrapException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}



}


}

Answer

Your code is globally correct it has only some little mistakes, here is how it could be done with your code:

// Use the try-with-resource statement to close all the resources properly
try (HSSFWorkbook workBook = new HSSFWorkbook();
     FileOutputStream fos = new FileOutputStream("/Users/parthpatil/Documents/11.xls")) {

    // Create the Sheet
    HSSFSheet Sheet = workBook.createSheet("products");

    // Create the first row corresponding to the header
    Row header = Sheet.createRow(0);
    header.createCell(0).setCellValue("Product Name");
    header.createCell(1).setCellValue("Product Price");
    header.createCell(2).setCellValue("Product MRP");

    // Ensure that all the List have the same size otherwise throw an exception
    if (al.size() != bl.size() || al.size() != cl.size())
        throw new IllegalStateException("Some data is missing");

    // Iterate over all the list an create the rows of data
    for(int i = 0; i < al.size(); i++){
        // Create the current starting from 1 to al.size()
        HSSFRow row = Sheet.createRow((short) i + 1);
        // Cell of the Product Name
        row.createCell(0).setCellValue(al.get(i));
        // Cell of the Product Price
        row.createCell(1).setCellValue(cl.get(i));
        // Cell of the Product MRP
        row.createCell(2).setCellValue(bl.get(i));
    }
    // Write the result into the file
    workBook.write(fos);
}