Question

我正在通过查询从数据库获取emp id并将emp id存储在excel表中。例如，在名为empid details的excel中存储10个emp id。在从excel逐个获取一个emp id并在应用程序中搜索之后，我们获得了员工发票编号列表，需要将这些发票编号列表存储在第一列中，并将相关的emp ID存储在另一个称为发票明细的excel中。我们需要在excel中存储10个发票编号列表。我已经完成了用于存储单个emp Id发票详细信息的编码部分。谁能帮助我如何获得n个emp id的代码并存储带有emp id的发票。

谢谢。

Answer 1

根据您的要求替换Excel文件名，工作表名称，行号，列号和存储值，并按照注释进行解释。

尝试以下代码：

import java.io.File;
import java.util.List;

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;

public class Answer {
    // Below method will give the excel data based on the passed row and the column number
    private static String getData(String fileName, String sheetName, int rowNumber, int columnNumber) throws Exception {
        Workbook workbook = WorkbookFactory.create(new File(fileName));
        Sheet sheet = workbook.getSheet(sheetName);
        Row row = sheet.getRow(rowNumber);
        return row.getCell(columnNumber).getStringCellValue().trim();
    }
    // Below method will return the row count
    private static int getRowCount(String fileName, String sheetName) throws Exception {
        return WorkbookFactory.create(new File(fileName)).getSheet(sheetName).getLastRowNum() + 1;
    }
    // Below method will store the data in excel sheet based on the passed row and column indexes
    private static void putData(String fileName, String sheetName, int rowNumber, int columnNumber, String cellValue) throws Exception {
        Workbook workbook = WorkbookFactory.create(new File(fileName));
        Sheet sheet = workbook.createSheet(sheetName);
        Row row = sheet.createRow(rowNumber);
        row.createCell(columnNumber).setCellValue(cellValue);
    }
    public static void main(String ...ali) throws Exception {
        // Retrieve data from the Database using some queries

        // Store the retrieved data into some excel sheet

        // After doing the above two steps, below code will retrieve previously stored emp id's and will store into an other excel sheet
        // Pass the corresponding absolute excel file path with name, sheet names in the below sample code 

        for(int i=0;i<getRowCount("SomeExcelFileName", "SomeExcelSheetName");i++) {
            // Get one by one emp id from excel
            String empID = getData("SomeExcelFileName", "SomeExcelSheetName", i, 0);

            // Search in the application and get invoice numbers list and store it
            List<String> invoiceDetails = null;

            // Store the invoice details list in the first column, here the row number is starting from 1 and column index is 0
            putData("AntoherExcelFile", "AnotherExcelSheet", (i+1), 0, invoiceDetails.toString());

            // Store the related emp id in the second column, here the row number is starting from 1 and column index is 1
            putData("AntoherExcelFile", "AnotherExcelSheet", (i+1), 1, empID);
        }
    }
}

如果程序成功执行且没有任何错误，那么您将获得以下示例格式的excel数据：

|Invoice Details | Emp ID|
| details 1      | 3333  |
| some details   | 1306  |
| Hello World!   | 2019  |

希望对您有帮助...

Answer 2

根据您的要求，我将代码从Apache POI更改为Java Excel API，以便从excel检索和存储数据。

尝试以下代码，让我知道您是否遇到任何问题...

import java.io.File;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;

import jxl.Cell;
import jxl.CellType;
import jxl.CellView;
import jxl.Sheet;
import jxl.Workbook;
import jxl.WorkbookSettings;
import jxl.format.UnderlineStyle;
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;

public class OneMore {
    private WritableCellFormat timesBoldUnderline;
    private WritableCellFormat times;
    private WritableWorkbook workbook;
    private WritableSheet excelSheet;
    private String inputFile;
    private List<String> empIDs, invoiceDetails;

    public void setOutputFile(String inputFile) {
        this.inputFile = inputFile;
    }

    public void write(int SheetNumber) throws Exception {
        File file = new File(inputFile);
        WorkbookSettings wbSettings = new WorkbookSettings();

        wbSettings.setLocale(new Locale("en", "EN"));

        workbook = Workbook.createWorkbook(file, wbSettings);
        workbook.createSheet("Required", SheetNumber);
        excelSheet = workbook.getSheet(SheetNumber);
        createLabel(excelSheet);
    }

    private void createLabel(WritableSheet sheet) throws Exception {
        // Lets create a times font
        WritableFont times10pt = new WritableFont(WritableFont.TIMES, 10);
        // Define the cell format
        times = new WritableCellFormat(times10pt);
        // Lets automatically wrap the cells
        times.setWrap(true);

        // create create a bold font with unterlines
        WritableFont times10ptBoldUnderline = new WritableFont(WritableFont.TIMES, 10, WritableFont.BOLD, false, UnderlineStyle.SINGLE);
        timesBoldUnderline = new WritableCellFormat(times10ptBoldUnderline);
        // Lets automatically wrap the cells
        timesBoldUnderline.setWrap(true);

        CellView cv = new CellView();
        cv.setFormat(times);
        cv.setFormat(timesBoldUnderline);
        cv.setAutosize(true);

        // Write a few headers
        addCaption(sheet, 0, 0, "Invoice Details");
        addCaption(sheet, 1, 0, "Emp ID");
    }

    private void retrieveDataFromDBAndStoreItInExcel(WritableSheet sheet) throws Exception {
        // Handling data base part
        Connection con = null;
        Class.forName("driver name").newInstance();
        con = DriverManager.getConnection("URL", "UN", "PWD");
        System.out.println("Connection Created");
        ResultSet rs = null;
        try{
            Statement stmt = con.createStatement();
            System.out.println("Statement Created");
            String query = "query to get data from db";
            rs = stmt.executeQuery(query);
            System.out.println("Query executed");
            ResultSetMetaData metadata = rs.getMetaData();
        }catch (Exception e) {
            System.out.println("Error.......: "+e);
        }

        // Storing the database data into the excel
        for(int i=0; rs.next();i++) {
            // First column
            addLabel(sheet, 0, i, rs.getString(1));
        }
        rs.close();
    }

    private void createContent(List<String> list, WritableSheet sheet, int columnNumber) throws Exception {
        for(int i=0; i<list.size();i++) {
            // First column
            addLabel(sheet, columnNumber, i, list.get(i).toString());
        }
    }

    private void addCaption(WritableSheet sheet, int column, int row, String s) throws Exception {
        Label label;
        label = new Label(column, row, s, timesBoldUnderline);
        sheet.addCell(label);
    }

    private void addLabel(WritableSheet sheet, int column, int row, String s) throws Exception {
        Label label;
        label = new Label(column, row, s, times);
        sheet.addCell(label);
    }

    public void read() throws Exception  {
        File inputWorkbook = new File(inputFile);
        empIDs = new ArrayList<String>();
        Workbook w;
        try {
            w = Workbook.getWorkbook(inputWorkbook);
            // Get the first sheet
            Sheet sheet = w.getSheet(0);
            // Loop over first column up to 10 rows
            for(int i=0;i<sheet.getRows();i++) {
                Cell cell = sheet.getCell(0, i);
                CellType type = cell.getType();
                if (type == CellType.LABEL) {
                    empIDs.add(cell.getContents());
                }
            }
        } catch (BiffException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws Exception {
        OneMore test = new OneMore();
        // Retrieving Data from the Database and storing in the First Excel
        test.setOutputFile("C:\\NotBackedUp\\OxygenWorkspace\\HelloSelenium\\src\\main\\resources\\test\\FirstExcel.xls");
        test.write(0);
        test.retrieveDataFromDBAndStoreItInExcel(test.excelSheet);
        test.workbook.write();
        test.workbook.close();
        System.out.println("=> The First Excel Writing task completed...");

        // Reading data from the First Excel and storing it in empIDs ArrayList
        test.read();
        System.out.println("=> The Excel Data is : "+test.empIDs);

        // You use empIDs ArrayList which has emp ids for getting the invoice details from the Application and store it in the invoiceDetails ArrayList below
        test.invoiceDetails = new ArrayList<String>();
        test.invoiceDetails.add("Invoice Details from the Application");

        // Writing the Invoice Details and the emp id Data to the Second Excel
        test.setOutputFile("C:\\NotBackedUp\\OxygenWorkspace\\HelloSelenium\\src\\main\\resources\\test\\SecondExcel.xls");
        test.write(0);
        test.createContent(test.invoiceDetails, test.excelSheet, 0);
        test.createContent(test.empIDs, test.excelSheet, 1);
        test.workbook.write();
        test.workbook.close();
    }
}

我第一次尝试使用jxl，所以我已经测试了如何在系统中读取和写入数据到excel并按预期工作。

但是我没有测试数据库部分和所有，所以尝试修改/由main（）方法以下评论执行。您无需编写任何代码，只需根据需要更改一些配置详细信息和excel文件名路径。

我希望它对您有帮助...编码愉快...

根据搜索条件在Excel中存储多个值

2 个答案: