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package com.platform.utils.excelUtils;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.lang.reflect.Field;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import org.apache.poi.hssf.usermodel.HSSFCell;
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import org.apache.poi.hssf.usermodel.HSSFCellStyle;
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import org.apache.poi.hssf.util.HSSFColor;
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import org.apache.poi.xssf.usermodel.XSSFCell;
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import org.apache.poi.xssf.usermodel.XSSFCellStyle;
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import org.apache.poi.xssf.usermodel.XSSFFont;
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import org.apache.poi.xssf.usermodel.XSSFRow;
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import org.apache.poi.xssf.usermodel.XSSFSheet;
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import org.apache.poi.xssf.usermodel.XSSFWorkbook;
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/**
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* @author chen
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* excel2007操作
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*/
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public class ExcelOperation {
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/** 写入excel
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* @param workbook 模板
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* @param excelInitRow 从第excelInitRow行 开始填充数据，( Constant.EXCEL_TEMPLATE_INIT_ROW)
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* @param excelInitCell 从第excelInitCell列 开始填充数据，
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* @param excelEndCell 到第excelEndCell列 结束，
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* @param list list中对象的属性顺序和模板的列顺序一一对应
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* @param filter list中对象的属性过滤（比如"id"）
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* @return 带有数据的XSSFWorkbook
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* @throws FileNotFoundException
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* @throws IOException
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* @throws IllegalArgumentException
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* @throws IllegalAccessException
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*/
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public static XSSFWorkbook writeExcelTemplate(XSSFWorkbook workbook, int excelInitRow, int excelInitCell, int excelEndCell,List list, String... filter) throws FileNotFoundException, IOException, IllegalArgumentException, IllegalAccessException {
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List<String> filters = new ArrayList<String>();
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filters.addAll(Arrays.asList(filter));
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//读取工作表
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XSSFSheet sheet = workbook.getSheetAt(0);//getSheet("Sheet1");
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XSSFRow row;
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XSSFCell cell = null;
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int size = list.size();
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int lengths = 0;
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XSSFCellStyle style = getStyle(workbook);
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for (int i = 0; i < size; i++) {
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row = sheet.createRow(excelInitRow);
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Object obj = list.get(i);
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Field[] fields = obj.getClass().getDeclaredFields();
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lengths = fields.length;
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int num = 0;
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for (int j = 0; j < lengths; j++) {
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if (j - num >= lengths) {
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break;
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}
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if (j >= excelEndCell) {
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break;
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}
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num = getWriteIndex(filters, fields, j - num, num);
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if (num == 1) {
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break;
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}
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Field tmpField = fields[j - num];
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tmpField.setAccessible(true);
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cell = row.createCell((short) j,HSSFCellStyle.ALIGN_CENTER);
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cell.setCellType(HSSFCell.CELL_TYPE_STRING);
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Object value = tmpField.get(obj);
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if (null != value) {
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//int型
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if (tmpField.getType().toString().contains("Integer") || tmpField.getType().toString().contains("int")) {
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if (filters.contains(tmpField.getName()))
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cell.setCellValue("-");
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else
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cell.setCellValue(String.valueOf(value));
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}
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else {
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cell.setCellValue(value.toString());
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}
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}
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else {
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cell.setCellValue("");
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}
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cell.setCellStyle(style);
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}
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//下一行
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excelInitRow++;
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}
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for (int k = 0; k < lengths; k++) {
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sheet.autoSizeColumn(k);
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int width = sheet.getColumnWidth(k);
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if (width < 1600) {
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sheet.setColumnWidth(k, 1600);
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}else {
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sheet.setColumnWidth(k, width + 1000);
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}
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}
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return workbook;
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}
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/** excel的cell样式设置
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* @param workbook
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* @return
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*/
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private static XSSFCellStyle getStyle(XSSFWorkbook workbook) {
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// 设置字体;
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XSSFFont font = workbook.createFont();
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//设置字体大小;
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font.setFontHeightInPoints((short)9);
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//设置字体名字;
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font.setFontName("Courier New");
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//font.setItalic(true);
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//font.setStrikeout(true);
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// 设置样式;
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XSSFCellStyle style = workbook.createCellStyle();
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//设置底边框;
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style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
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//设置底边框颜色;
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style.setBottomBorderColor(HSSFColor.BLACK.index);
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//设置左边框;
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style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
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//设置左边框颜色;
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style.setLeftBorderColor(HSSFColor.BLACK.index);
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//设置右边框;
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style.setBorderRight(HSSFCellStyle.BORDER_THIN);
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//设置右边框颜色;
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style.setRightBorderColor(HSSFColor.BLACK.index);
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//设置顶边框;
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style.setBorderTop(HSSFCellStyle.BORDER_THIN);
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//设置顶边框颜色;
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style.setTopBorderColor(HSSFColor.BLACK.index);
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//在样式用应用设置的字体;
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style.setFont(font);
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//设置自动换行;
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style.setWrapText(false);
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//设置水平对齐的样式为居中对齐;
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style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
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//设置垂直对齐的样式为居中对齐;
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style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
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return style;
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}
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/** 读取excel模板
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* @param workbook excel的带数据的XSSFWorkbook
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* @param excelInitRow 读取数据的起始行
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* @param excelInitCell 读取数据的起始列
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* @param classz excel的每行数据导出 到的 类
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* @param filter excel的每行数据导出 到的 类 的属性的过滤
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* @return 类 的集合
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* @throws InstantiationException
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* @throws IllegalAccessException
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*/
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public static List readExcel4Update(XSSFWorkbook workbook, int excelInitRow, int excelInitCell, Object obj, String... filter) throws InstantiationException, IllegalAccessException {
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List<String> filters = new ArrayList<String>();
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Class<?> classz = obj.getClass();
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filters.addAll(Arrays.asList(filter));
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List list = null;
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//读取工作表
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XSSFSheet sheet = workbook.getSheetAt(0);//getSheet("Sheet1");
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XSSFRow row;
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XSSFCell cell = null;
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//excel总行数
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int rowNum = sheet.getLastRowNum();
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// row = sheet.getRow(excelInitRow);
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// //excel总列数
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// int colNum = row.getPhysicalNumberOfCells();
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// 填充数据的类的 属性个数
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int objColl = classz.getDeclaredFields().length;
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//如果有数据
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if (rowNum > excelInitRow) {
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list = new ArrayList<>();
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//遍历每行数据
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for (int i = excelInitRow; i < rowNum; i++) {
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//获得当前行
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row = sheet.getRow(i);
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cell = row.getCell(excelInitCell);
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if ("-".equals(getValue(cell))) {
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continue;
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}
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//实例化
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Object newObj = classz.newInstance();
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Field[] fields = classz.getDeclaredFields();
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int fieldSize = fields.length;
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boolean isAddObj = false;
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int num = 0;
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//遍历每列的数据
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for (int j = excelInitCell; j < objColl; j++) {
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cell = row.getCell(j);
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if (j + num >= fieldSize) {
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break;
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}
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num = getIndex(filters, fields, j + num, num);
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if (num == -1) {
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break;
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}
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Field tmpField = fields[j + num];
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if (null != cell) {
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tmpField.setAccessible(true);
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String cellString = getValue(cell);
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if (!"".equals(cellString)) {
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isAddObj = true;
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String type = tmpField.getGenericType().toString();
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//int型
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if (type.contains("Integer") ||type.contains("int")) {
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double dnum = Double.valueOf(cellString);
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int inum = (int) dnum;
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tmpField.set(newObj, inum);
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}
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//double型
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else if (type.contains("Double") ||type.contains("double")) {
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tmpField.set(newObj, Double.valueOf(cellString));
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}
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//boolean型
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else if (type.contains("boolean") ||type.contains("Boolean")) {
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tmpField.set(newObj, Boolean.valueOf(cellString));
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}
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else {
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tmpField.set(newObj, cellString);
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}
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}
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}
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}
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if (isAddObj) {
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list.add(newObj);
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}
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}
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}
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return list;
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}
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/** 获得cell里的字符串
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* @param cell
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* @return
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*/
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private static String getValue(XSSFCell cell) {
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String value ="";
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if (null == cell) {
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return value;
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}
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switch (cell.getCellType()) {
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case XSSFCell.CELL_TYPE_NUMERIC:
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double doubleVal = cell.getNumericCellValue();
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long longVal = Math.round(cell.getNumericCellValue());
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if(Double.parseDouble(longVal + ".0") == doubleVal)
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value = String.valueOf(longVal);
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else
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value = String.valueOf(doubleVal);
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break;
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case XSSFCell.CELL_TYPE_BOOLEAN:
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value = String.valueOf(cell.getBooleanCellValue());
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break;
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case XSSFCell.CELL_TYPE_STRING:
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value = cell.getStringCellValue();
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break;
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default:
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break;
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}
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return value.trim();
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}
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/** 过滤掉 filters中含有的 属性
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* @param filters
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* @param fields
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* @param cur
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* @param num
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* @return
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*/
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private static int getIndex(List<String> filters, Field[] fields,int cur, int num) {
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if (null == filters || filters.size() == 0) {
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return num;
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}
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if (cur >= fields.length) {
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return -1;
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}
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if (filters.contains(fields[cur].getName())) {
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num++;
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num = getIndex(filters, fields, cur+1, num);
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}
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return num;
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}
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/** 过滤掉 filters中含有的 属性
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* @param filters
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* @param fields
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* @param cur
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* @param num
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* @return
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*/
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private static int getWriteIndex(List<String> filters, Field[] fields,int cur, int num) {
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if (null == filters || filters.size() == 0) {
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return num;
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}
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if (cur >= fields.length) {
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return 1;
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}
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if (filters.contains(fields[cur].getName())) {
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num--;
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num = getWriteIndex(filters, fields, cur+1, num);
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}
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return num;
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}
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}
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