Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package vd10_workbook; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.Iterator; import java.util.List; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.IndexedColors; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.ss.util.RegionUtil; import org.apache.poi.xssf.usermodel.XSSFCell; import org.apache.poi.xssf.usermodel.XSSFCellStyle; import org.apache.poi.xssf.usermodel.XSSFRow; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import static vd10_workbook.AssignedVoteManagement.db; /** * * @author Tran Ngoc Dan * @since 30/09/2016 */ public class DepartmentManagement { static DatabaseConnection db = new DatabaseConnection(); private List<Department> list; public DepartmentManagement() { } //load data from table don_vi public void loadDataBase() throws SQLException, ClassNotFoundException { this.list = new ArrayList<>(); //connect database and load data try (Connection conn = db.connect()) { try (Statement statement = (Statement) conn.createStatement()) { //== load data from table don_vi ==// String sql = "SELECT * FROM don_vi"; ResultSet resultSet = statement.executeQuery(sql); while (resultSet.next()) {//require ths condition this.list.add(new Department(resultSet.getString("Ten"))); } statement.close(); } conn.close(); } } //load data from worksheet don_vi public void loadWorkSheet(XSSFWorkbook workbook) throws ParseException { this.list = new ArrayList<>(); //Get the sheet at index 0 (fist sheet) XSSFSheet spreadsheet = workbook.getSheet("don_vi"); //declare row XSSFRow row; //declare Iterator<Row> to browse row by row Iterator<Row> rowIterator = spreadsheet.iterator(); row = (XSSFRow) rowIterator.next(); row = (XSSFRow) rowIterator.next(); while (rowIterator.hasNext()) { row = (XSSFRow) rowIterator.next(); Iterator<Cell> cellIterator = row.cellIterator(); Cell cell = cellIterator.next(); cell = cellIterator.next(); this.list.add(new Department(cell.getStringCellValue())); } } //write data from worksheet don_vi into database public void writeIntoDatabase() throws SQLException, ClassNotFoundException { try (Connection conn = db.connect()) { //== load data from table kha_nang ==// PreparedStatement statement = null; for (int i = 0; i < this.list.size(); i++) { String sql = "INSERT INTO don_vi VALUES (NULL,'" + this.list.get(i).getName() + "')"; statement = conn.prepareStatement(sql); statement.execute(); } statement.close(); System.out.println("Successfully!"); conn.close(); } catch (SQLException | ClassNotFoundException ex) { System.out.println("Can not add new product"); } } //create worksheet don_vi and fill out the information public void createWorkSheet(XSSFWorkbook workbook) { XSSFSheet sheet = workbook.createSheet("don_vi"); int startRow = 0; XSSFRow row = sheet.createRow((short) startRow); //== THE TITLE ==// //SET HEIGHT OF ROW 2 (in excel) row.setHeight((short) 500); XSSFCell cell = (XSSFCell) row.createCell((short) 0); cell.setCellValue("?n v"); //MEARGING CELLS //this statement for merging cells CellRangeAddress cellRangeAddress = new CellRangeAddress(startRow, //first row (0-based) startRow, //last row (0-based) 0, //first column (0-based) 1 //last column (0-based) ); sheet.addMergedRegion(cellRangeAddress); // Center Align Cell Contents XSSFCellStyle align = workbook.createCellStyle(); align.setAlignment(XSSFCellStyle.ALIGN_CENTER); align.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER); cell.setCellStyle(align); //set border AbilityManagement.setRegionBoder(cellRangeAddress, workbook, sheet); //==THE LABELS ==// //STT row = sheet.createRow((short) startRow + 1); row.setHeight((short) 400); cell = (XSSFCell) row.createCell((short) 0); cell.setCellValue("STT"); AbilityManagement.setThickBorder(cell, workbook); //Tn n v sheet.setColumnWidth(1, 5000); cell = (XSSFCell) row.createCell((short) 1); cell.setCellValue("Tn n v"); AbilityManagement.setThickBorder(cell, workbook); //fill out the rows for (int i = 0; i < this.list.size(); i++) { row = sheet.createRow((short) startRow + 2 + i); cell = (XSSFCell) row.createCell((short) 0); AbilityManagement.setThinBorder(cell, workbook); cell.setCellValue(i + 1); cell = (XSSFCell) row.createCell((short) 1); AbilityManagement.setThinBorder(cell, workbook); cell.setCellValue(this.list.get(i).getName().toString()); } } //set border public static void setThickBorder(XSSFCell cell, XSSFWorkbook workbook) { XSSFCellStyle border = workbook.createCellStyle(); border.setBorderTop(XSSFCellStyle.BORDER_MEDIUM); border.setBottomBorderColor(IndexedColors.BLACK.getIndex()); border.setBorderBottom(XSSFCellStyle.BORDER_MEDIUM); border.setRightBorderColor(IndexedColors.BLACK.getIndex()); border.setBorderLeft(XSSFCellStyle.BORDER_MEDIUM); border.setTopBorderColor(IndexedColors.BLACK.getIndex()); border.setBorderRight(XSSFCellStyle.BORDER_MEDIUM); border.setLeftBorderColor(IndexedColors.BLACK.getIndex()); cell.setCellStyle(border); } public void showInfo() { for (int i = 0; i < this.list.size(); i++) { this.list.get(i).showInfo(); } } }