package com.javaweb.common.utils.poiNew;
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import com.javaweb.common.annotation.Excel;
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import com.javaweb.common.annotation.ExcelImport;
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import com.javaweb.common.config.Global;
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import com.javaweb.common.core.domain.AjaxResult;
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import com.javaweb.common.utils.DateUtils;
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import com.javaweb.common.utils.StringUtils;
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import com.javaweb.common.utils.TimeUuidUtil;
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import org.apache.poi.hssf.usermodel.*;
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import org.apache.poi.hssf.util.HSSFColor.HSSFColorPredefined;
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import org.apache.poi.ss.usermodel.*;
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import org.apache.poi.ss.util.CellRangeAddressList;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.*;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.math.BigDecimal;
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import java.text.SimpleDateFormat;
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import java.util.*;
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/**
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* Excel相关处理
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*
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* @author lws
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*/
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public class ExcelUtilNew<T> {
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private static final Logger log = LoggerFactory.getLogger(com.javaweb.common.utils.poi.ExcelUtil.class);
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public Class<T> clazz;
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public ExcelUtilNew(Class<T> clazz) {
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this.clazz = clazz;
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}
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/**
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* 对excel表单默认第一个索引名转换成list
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*
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* @param input 输入流
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* @return 转换后集合
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*/
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public List<T> importExcel(InputStream input) throws Exception {
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return importExcel(StringUtils.EMPTY, input);
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}
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/**
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* 对excel表单指定表格索引名转换成list
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*
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* @param sheetName 表格索引名
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* @param input 输入流
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* @return 转换后集合
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*/
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public List<T> importExcel(String sheetName, InputStream input) throws Exception {
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List<T> list = new ArrayList<T>();
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Workbook workbook = WorkbookFactory.create(input);
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Sheet sheet = null;
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if (StringUtils.isNotEmpty(sheetName)) {
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// 如果指定sheet名,则取指定sheet中的内容.
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sheet = workbook.getSheet(sheetName);
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} else {
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// 如果传入的sheet名不存在则默认指向第1个sheet.
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sheet = workbook.getSheetAt(0);
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}
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if (sheet == null) {
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throw new IOException("文件sheet不存在");
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}
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int rows = sheet.getPhysicalNumberOfRows();
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if (rows > 0) {
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// 默认序号
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int serialNum = 0;
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// 有数据时才处理 得到类的所有field.
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Field[] allFields = clazz.getDeclaredFields();
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// 定义一个map用于存放列的序号和field.
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Map<Integer, Field> fieldsMap = new HashMap<Integer, Field>();
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for (int col = 0; col < allFields.length; col++) {
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Field field = allFields[col];
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// 将有注解的field存放到map中.
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if (field.isAnnotationPresent(ExcelImport.class)) {
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ExcelImport excelImport = field.getAnnotation(ExcelImport.class);
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// 设置类的私有字段属性可访问.
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field.setAccessible(true);
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fieldsMap.put(excelImport.colNum(), field);
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serialNum++;
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}
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}
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for (int i = 1; i < rows; i++) {
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// 从第2行开始取数据,默认第一行是表头.
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Row row = sheet.getRow(i);
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int cellNum = serialNum;
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T entity = null;
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for (int j = 0; j < cellNum; j++) {
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Cell cell = row.getCell(j);
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if (cell == null) {
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continue;
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} else {
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// 先设置Cell的类型，然后就可以把纯数字作为String类型读进来了
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row.getCell(j).setCellType(CellType.STRING);
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cell = row.getCell(j);
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}
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String c = cell.getStringCellValue();
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if (StringUtils.isEmpty(c)) {
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continue;
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}
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// 如果不存在实例则新建.
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entity = (entity == null ? clazz.newInstance() : entity);
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// 从map中得到对应列的field.
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Field field = fieldsMap.get(j);
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// 取得类型,并根据对象类型设置值.
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Class<?> fieldType = field.getType();
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if (String.class == fieldType) {
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field.set(entity, String.valueOf(c));
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} else if ((Integer.TYPE == fieldType) || (Integer.class == fieldType)) {
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field.set(entity, Integer.parseInt(c));
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} else if ((Long.TYPE == fieldType) || (Long.class == fieldType)) {
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field.set(entity, Long.valueOf(c));
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} else if ((Float.TYPE == fieldType) || (Float.class == fieldType)) {
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field.set(entity, Float.valueOf(c));
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} else if ((Short.TYPE == fieldType) || (Short.class == fieldType)) {
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field.set(entity, Short.valueOf(c));
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} else if ((Double.TYPE == fieldType) || (Double.class == fieldType)) {
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field.set(entity, Double.valueOf(c));
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} else if (Character.TYPE == fieldType) {
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if ((c != null) && (c.length() > 0)) {
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field.set(entity, Character.valueOf(c.charAt(0)));
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}
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} else if (Date.class == fieldType) {
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if (cell.getCellTypeEnum() == CellType.NUMERIC) {
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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cell.setCellValue(sdf.format(cell.getNumericCellValue()));
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c = sdf.format(cell.getNumericCellValue());
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} else {
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c = cell.getStringCellValue();
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}
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} else if (BigDecimal.class == fieldType) {
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c = cell.getStringCellValue();
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}
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}
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if (entity != null) {
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list.add(entity);
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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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/**
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* 下载excel模版
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*
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* @param sheetName
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* @return
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*/
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public AjaxResult exportExcelModel(String sheetName) {
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Field[] allFields = clazz.getDeclaredFields();
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Map<Integer, Field> heads = new HashMap<Integer, Field>();
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int totalCol = 0;
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// 得到所有field并存放到一个list中.
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ExcelImport attr = null;
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for (Field field : allFields) {
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if (field.isAnnotationPresent(ExcelImport.class)) {
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attr = field.getAnnotation(ExcelImport.class);
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heads.put(attr.colNum(), field);
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totalCol++;
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}
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}
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HSSFWorkbook workbook = null;
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BufferedOutputStream out = null;
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try {
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// 产生工作薄对象
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workbook = new HSSFWorkbook();
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HSSFSheet sheet = workbook.createSheet(sheetName);
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HSSFRow row;
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HSSFCell cell; // 产生单元格
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// 产生一行
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row = sheet.createRow(0);
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// 写入各个字段的列头名称
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for (int i = 0; i < totalCol; i++) {
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Field field = heads.get(i);
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attr = field.getAnnotation(ExcelImport.class);
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// 创建列
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cell = row.createCell(i);
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writeHeadCell(workbook, sheet, cell, i, attr.colName(), attr.prompt());
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}
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String filename = encodingFilename(sheetName);
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out = new BufferedOutputStream(new FileOutputStream(getAbsoluteFile(filename)));
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workbook.write(out);
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return AjaxResult.success(filename);
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} catch (IOException e) {
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e.printStackTrace();
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return AjaxResult.error("下载异常！");
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} finally {
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if (workbook != null) {
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try {
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workbook.close();
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} catch (IOException e1) {
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e1.printStackTrace();
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}
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}
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if (out != null) {
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try {
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out.close();
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} catch (IOException e1) {
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e1.printStackTrace();
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}
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}
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}
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}
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private void writeHeadCell(HSSFWorkbook workbook, HSSFSheet sheet, HSSFCell cell, int col, String value, String prompt) {
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// 设置列中写入内容为String类型
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cell.setCellType(CellType.STRING);
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HSSFCellStyle cellStyle = workbook.createCellStyle();
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cellStyle.setAlignment(HorizontalAlignment.CENTER);
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cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
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if (value.indexOf("注：") >= 0) {
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HSSFFont font = workbook.createFont();
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font.setColor(HSSFFont.COLOR_RED);
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cellStyle.setFont(font);
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cellStyle.setFillForegroundColor(HSSFColorPredefined.YELLOW.getIndex());
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sheet.setColumnWidth(col, 6000);
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} else {
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HSSFFont font = workbook.createFont();
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// 粗体显示
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font.setBold(true);
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// 选择需要用到的字体格式
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cellStyle.setFont(font);
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cellStyle.setFillForegroundColor(HSSFColorPredefined.LIGHT_YELLOW.getIndex());
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// 设置列宽
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sheet.setColumnWidth(col, 3766);
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}
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cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
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cellStyle.setWrapText(true);
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cell.setCellStyle(cellStyle);
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// 写入列名
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cell.setCellValue(value);
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// 如果设置了提示信息则鼠标放上去提示.
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if (StringUtils.isNotEmpty(prompt)) {
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// 这里默认设了2-101列提示.
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setHSSFPrompt(sheet, "" , prompt, 1, 100, col, col);
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}
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}
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/**
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* 对list数据源将其里面的数据导入到excel表单
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*
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* @param list 导出数据集合
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* @param sheetName 工作表的名称
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* @return 结果
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*/
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public AjaxResult exportExcel(List<T> list, String sheetName) {
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BufferedOutputStream out = null;
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HSSFWorkbook workbook = null;
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try {
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// 得到所有定义字段
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Field[] allFields = clazz.getDeclaredFields();
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List<Field> fields = new ArrayList<Field>();
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// 得到所有field并存放到一个list中.
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for (Field field : allFields) {
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if (field.isAnnotationPresent(Excel.class)) {
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fields.add(field);
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}
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}
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// 产生工作薄对象
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workbook = new HSSFWorkbook();
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// excel2003中每个sheet中最多有65536行
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int sheetSize = 65536;
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// 取出一共有多少个sheet.
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double sheetNo = Math.ceil(list.size() / sheetSize);
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for (int index = 0; index <= sheetNo; index++) {
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// 产生工作表对象
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HSSFSheet sheet = workbook.createSheet();
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if (sheetNo == 0) {
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workbook.setSheetName(index, sheetName);
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} else {
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// 设置工作表的名称.
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workbook.setSheetName(index, sheetName + index);
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}
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HSSFRow row;
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HSSFCell cell; // 产生单元格
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// 产生一行
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row = sheet.createRow(0);
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// 写入各个字段的列头名称
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for (int i = 0; i < fields.size(); i++) {
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Field field = fields.get(i);
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Excel attr = field.getAnnotation(Excel.class);
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// 创建列
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cell = row.createCell(i);
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writeHeadCell(workbook, sheet, cell, i, attr.name(), attr.prompt());
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// 如果设置了combo属性则本列只能选择不能输入
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if (attr.combo().length > 0) {
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// 这里默认设了2-101列只能选择不能输入.
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setHSSFValidation(sheet, attr.combo(), 1, 100, i, i);
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}
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}
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int startNo = index * sheetSize;
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int endNo = Math.min(startNo + sheetSize, list.size());
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// 写入各条记录,每条记录对应excel表中的一行
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HSSFCellStyle cs = workbook.createCellStyle();
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cs.setAlignment(HorizontalAlignment.CENTER);
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cs.setVerticalAlignment(VerticalAlignment.CENTER);
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for (int i = startNo; i < endNo; i++) {
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row = sheet.createRow(i + 1 - startNo);
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// 得到导出对象.
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T vo = (T) list.get(i);
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for (int j = 0; j < fields.size(); j++) {
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// 获得field.
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Field field = fields.get(j);
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// 设置实体类私有属性可访问
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field.setAccessible(true);
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Excel attr = field.getAnnotation(Excel.class);
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try {
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// 根据Excel中设置情况决定是否导出,有些情况需要保持为空,希望用户填写这一列.
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if (attr.isExport()) {
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// 创建cell
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cell = row.createCell(j);
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cell.setCellStyle(cs);
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if (vo == null)
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{
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// 如果数据存在就填入,不存在填入空格.
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cell.setCellValue("");
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continue;
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}
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// 用于读取对象中的属性
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Object value = getTargetValue(vo, field, attr);
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String dateFormat = attr.dateFormat();
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String readConverterExp = attr.readConverterExp();
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if (StringUtils.isNotEmpty(dateFormat))
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{
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cell.setCellValue(DateUtils.parseDateToStr(dateFormat, (Date) value));
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}
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else if (StringUtils.isNotEmpty(readConverterExp))
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{
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cell.setCellValue(convertByExp(String.valueOf(value), readConverterExp));
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}
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else
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{
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cell.setCellType(CellType.STRING);
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// 如果数据存在就填入,不存在填入空格.
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cell.setCellValue(
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StringUtils.isNull(value) ? attr.defaultValue() : value + attr.suffix());
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}
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}
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} catch (Exception e) {
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log.error("导出Excel失败{}" , e.getMessage());
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}
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}
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}
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}
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String filename = encodingFilename(sheetName);
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out = new BufferedOutputStream(new FileOutputStream(getAbsoluteFile(filename)));
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workbook.write(out);
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return AjaxResult.success(filename);
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} catch (Exception e) {
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log.error("导出Excel异常{}" , e.getMessage());
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return AjaxResult.error("导出Excel失败，请联系网站管理员！");
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} finally {
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if (workbook != null) {
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try {
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workbook.close();
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} catch (IOException e1) {
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e1.printStackTrace();
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}
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}
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if (out != null) {
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try {
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out.close();
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} catch (IOException e1) {
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e1.printStackTrace();
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}
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}
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}
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}
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/**
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* 编码文件名
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*/
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public String encodingFilename(String filename) {
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filename = filename + "_" + TimeUuidUtil.get16UUID() + ".xls" ;
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return filename;
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}
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/**
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* 设置单元格上提示
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*
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* @param sheet 要设置的sheet.
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* @param promptTitle 标题
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* @param promptContent 内容
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* @param firstRow 开始行
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* @param endRow 结束行
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* @param firstCol 开始列
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* @param endCol 结束列
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* @return 设置好的sheet.
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*/
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public static HSSFSheet setHSSFPrompt(HSSFSheet sheet, String promptTitle, String promptContent, int firstRow,
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int endRow, int firstCol, int endCol) {
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// 构造constraint对象
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DVConstraint constraint = DVConstraint.createCustomFormulaConstraint("DD1");
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// 四个参数分别是：起始行、终止行、起始列、终止列
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CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol);
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// 数据有效性对象
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HSSFDataValidation dataValidationView = new HSSFDataValidation(regions, constraint);
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dataValidationView.createPromptBox(promptTitle, promptContent);
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sheet.addValidationData(dataValidationView);
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return sheet;
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}
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/**
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* 设置某些列的值只能输入预制的数据,显示下拉框.
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*
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* @param sheet 要设置的sheet.
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* @param textlist 下拉框显示的内容
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* @param firstRow 开始行
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* @param endRow 结束行
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* @param firstCol 开始列
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* @param endCol 结束列
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* @return 设置好的sheet.
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*/
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public static HSSFSheet setHSSFValidation(HSSFSheet sheet, String[] textlist, int firstRow, int endRow,
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int firstCol, int endCol) {
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// 加载下拉列表内容
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DVConstraint constraint = DVConstraint.createExplicitListConstraint(textlist);
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// 设置数据有效性加载在哪个单元格上,四个参数分别是：起始行、终止行、起始列、终止列
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CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol);
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// 数据有效性对象
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HSSFDataValidation dataValidationList = new HSSFDataValidation(regions, constraint);
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sheet.addValidationData(dataValidationList);
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return sheet;
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}
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/**
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* 解析导出值 0=男,1=女,2=未知
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*
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* @param propertyValue 参数值
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* @param converterExp 翻译注解
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* @return 解析后值
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* @throws Exception
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*/
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public String convertByExp(String propertyValue, String converterExp) throws Exception
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{
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try
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{
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String[] convertSource = converterExp.split(",");
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for (String item : convertSource)
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{
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String[] itemArray = item.split("=");
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if (itemArray[0].equals(propertyValue))
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{
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return itemArray[1];
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}
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}
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}
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catch (Exception e)
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{
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throw e;
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}
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return propertyValue;
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}
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/**
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* 获取bean中的属性值
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*
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* @param vo 实体对象
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* @param field 字段
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* @param excel 注解
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* @return 最终的属性值
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* @throws Exception
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*/
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private Object getTargetValue(T vo, Field field, Excel excel) throws Exception
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{
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Object o = field.get(vo);
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if (StringUtils.isNotEmpty(excel.targetAttr()))
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{
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String target = excel.targetAttr();
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if (target.indexOf(".") > -1)
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{
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String[] targets = target.split("[.]");
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for (String name : targets)
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{
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o = getValue(o, name);
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}
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}
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else
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{
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o = getValue(o, target);
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}
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}
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return o;
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}
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/**
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* 以类的属性的get方法方法形式获取值
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*
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* @param o
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* @param name
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* @return value
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* @throws Exception
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*/
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private Object getValue(Object o, String name) throws Exception
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{
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if (StringUtils.isNotEmpty(name))
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{
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Class<?> clazz = o.getClass();
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String methodName = "get" + name.substring(0, 1).toUpperCase() + name.substring(1);
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Method method = clazz.getMethod(methodName);
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o = method.invoke(o);
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}
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return o;
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}
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/**
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* 获取下载路径
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*
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* @param filename 文件名称
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*/
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public String getAbsoluteFile(String filename) {
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String downloadPath = Global.getDownloadPath() + filename;
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File desc = new File(downloadPath);
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if (!desc.getParentFile().exists()) {
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desc.getParentFile().mkdirs();
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}
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return downloadPath;
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}
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}
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