package com.mzl.flower.utils;
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import org.apache.poi.hssf.usermodel.*;
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import org.apache.poi.hssf.util.HSSFColor;
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import org.apache.poi.ss.usermodel.BorderStyle;
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import org.apache.poi.ss.usermodel.CellType;
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import org.apache.poi.ss.usermodel.HorizontalAlignment;
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import org.apache.poi.ss.usermodel.VerticalAlignment;
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import org.apache.poi.ss.util.CellRangeAddress;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.net.URLEncoder;
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import java.text.SimpleDateFormat;
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import java.time.ZonedDateTime;
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import java.time.format.DateTimeFormatter;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.List;
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public class ExcelExportUtil {
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//显示的导出表的标题
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private String title;
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//导出表的列名
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private String[] rowName ;
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private List<HeadRow> headRows;
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private List<Object[]> dataList = new ArrayList<>();
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private HttpServletResponse response;
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//默认日期格式
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private String dateFormat = "yyyy-MM-dd";
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public static class HeadRow{
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int rowIndex;
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List<HeadColumn> columns;
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public HeadRow(int rowIndex, List<HeadColumn> columns){
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this.columns = columns;
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this.rowIndex = rowIndex;
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}
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}
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public static class HeadColumn{
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int columnIndex;
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int rowspan;
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int colspan;
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String name;
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public HeadColumn(int columnIndex, int rowspan, int colspan, String name){
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this.columnIndex = columnIndex;
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this.rowspan = rowspan;
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this.colspan = colspan;
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this.name = name;
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}
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}
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public ExcelExportUtil(String title, List<HeadRow> headRows, List<Object[]> dataList, HttpServletResponse response){
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this.dataList = dataList;
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this.headRows = headRows;
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this.title = title;
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this.response = response;
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}
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public ExcelExportUtil(String title, List<HeadRow> headRows, List<Object[]> dataList, HttpServletResponse response, String dateFormat){
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this.dataList = dataList;
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this.headRows = headRows;
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this.title = title;
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this.response = response;
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this.dateFormat = dateFormat;
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}
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/**
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* 构造函数，传入要导出的数据
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* @param title 标题
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* @param rowName 列名
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* @param dataList 数据集合 List
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* @param response http响应
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*/
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public ExcelExportUtil(String title, String[] rowName, List<Object[]> dataList, HttpServletResponse response){
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this.dataList = dataList;
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this.rowName = rowName;
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this.title = title;
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this.response = response;
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}
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/**
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* 构造函数，传入要导出的数据,带日期格式
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* @param title 标题
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* @param rowName 列名
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* @param dataList 数据集合 List
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* @param response http响应
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* @param dateFormat 日期格式
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*/
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public ExcelExportUtil(String title, String[] rowName, List<Object[]> dataList, HttpServletResponse response, String dateFormat){
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this.dataList = dataList;
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this.rowName = rowName;
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this.title = title;
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this.response = response;
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this.dateFormat = dateFormat;
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}
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private int prepareHeader(HSSFSheet sheet, HSSFCellStyle columnTopStyle){
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int step = 0;
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if(headRows != null){
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for(HeadRow row : headRows){
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int firstRow = row.rowIndex;
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HSSFRow rowHeader = sheet.getRow(firstRow);
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if(rowHeader == null){
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rowHeader = sheet.createRow(firstRow);
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}
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List<HeadColumn> columns = row.columns;
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int s = 1;
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for(HeadColumn c : columns){
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int lastRow = firstRow + c.rowspan - 1;
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int firstCol = c.columnIndex;
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int lastCol = firstCol + c.colspan - 1;
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if(lastRow > firstRow || lastCol > firstCol) {
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for(int i = firstRow; i <= lastRow; i++){
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for(int j = firstCol; j <= lastCol; j++){
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HSSFRow rowHeader1 = sheet.getRow(i);
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if(rowHeader1 == null){
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rowHeader1 = sheet.createRow(i);
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}
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HSSFCell cell = rowHeader1.getCell(j);
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if(cell == null){
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cell = rowHeader1.createCell(j);
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}
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cell.setCellStyle(columnTopStyle);
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}
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}
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sheet.addMergedRegion(new CellRangeAddress(firstRow, lastRow, firstCol, lastCol));
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}
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HSSFCell cell = rowHeader.getCell(firstCol);
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if(cell == null){
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cell = rowHeader.createCell(firstCol);
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}
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cell.setCellStyle(columnTopStyle);
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cell.setCellType(CellType.STRING);
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HSSFRichTextString text = new HSSFRichTextString(c.name);
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cell.setCellValue(text);
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if(s < c.rowspan){
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s = c.rowspan;
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}
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}
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step += s;
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}
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}else if(rowName != null){
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// 产生表格标题行
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HSSFRow rowTitle = sheet.createRow(0);
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HSSFCell cellTitle = rowTitle.createCell(0);
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sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (rowName.length-1)));
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cellTitle.setCellStyle(columnTopStyle);
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cellTitle.setCellValue(title);
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// 定义所需列数
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int columnNum = rowName.length;
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HSSFRow rowRowName = sheet.createRow(2); // 在索引2的位置创建行(最顶端的行开始的第二行)
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// 将列头设置到sheet的单元格中
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for(int n = 0; n < columnNum; n++){
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HSSFCell cellRowName = rowRowName.createCell(n); //创建列头对应个数的单元格
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cellRowName.setCellType(CellType.STRING); //设置列头单元格的数据类型
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HSSFRichTextString text = new HSSFRichTextString(rowName[n]);
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cellRowName.setCellValue(text); //设置列头单元格的值
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cellRowName.setCellStyle(columnTopStyle); //设置列头单元格样式
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}
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step = 3;
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}
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return step;
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}
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/*
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* 导出数据
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* */
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public void export() throws Exception{
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try{
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HSSFWorkbook workbook = new HSSFWorkbook(); // 创建工作簿对象
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HSSFSheet sheet = workbook.createSheet(title); // 创建工作表
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//sheet样式定义【getColumnTopStyle()/getStyle()均为自定义方法 - 在下面 - 可扩展】
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HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);//获取列头样式对象
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HSSFCellStyle style = this.getStyle(workbook); //单元格样式对象
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int step = prepareHeader(sheet, columnTopStyle);
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//将查询出的数据设置到sheet对应的单元格中
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if (null != dataList && dataList.size() > 0) {
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int cellNum = 0;
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for(int i = 0; i < dataList.size(); i++){
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Object[] obj = dataList.get(i);//遍历每个对象
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HSSFRow row = sheet.createRow(i + step);//创建所需的行数
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for(int j = 0; j < obj.length; j++){
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HSSFCell cell = row.createCell(j); //设置单元格的数据类型
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//HSSFCell cell = row.createCell(j,HSSFCell.CELL_TYPE_STRING); //设置单元格的数据类型
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cell.setCellStyle(style); //设置单元格样式
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cellNum = setCellValue(cell, obj[j], cellNum, row);
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cellNum++;
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}
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}
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}
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if(workbook !=null){
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OutputStream out = null;
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try{
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String fileName = "Excel-" + String.valueOf(System.currentTimeMillis()).substring(4, 13) + ".xls";
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String headStr = "attachment; filename=\"" + fileName + "\"";
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response.setContentType("application/vnd.ms-excel");
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response.setHeader("Content-Disposition", headStr);
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response.addHeader("filename", URLEncoder.encode(fileName, "UTF-8"));
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out = response.getOutputStream();
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workbook.write(out);
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out.flush();
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}
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catch (IOException e){
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}
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finally{
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if (null != out){
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out.close();
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}
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}
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}
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}catch(Exception e){
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e.printStackTrace();
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}
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}
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private int setCellValue(HSSFCell cell, Object value, int cellNum, HSSFRow row){
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String textValue = null;
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if (value instanceof Integer) {
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int intValue = (Integer) value;
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cell.setCellValue(intValue);
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} else if (value instanceof Float) {
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float fValue = (Float) value;
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cell.setCellValue(fValue);
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} else if (value instanceof Double) {
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double dValue = (Double) value;
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cell.setCellValue(dValue);
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} else if (value instanceof Long) {
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long longValue = (Long) value;
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cell.setCellValue(longValue);
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} else if (value instanceof Boolean) {
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boolean bValue = (Boolean) value;
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cell.setCellValue(bValue);
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} else if (value instanceof Date) {
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Date date = (Date) value;
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SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
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textValue = sdf.format(date);
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} else if (value instanceof ZonedDateTime){
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DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(dateFormat);
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textValue = dateTimeFormatter.format((ZonedDateTime) value);
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}else if (value instanceof String[]) {
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String[] strArr = (String[]) value;
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for (int j = 0; j < strArr.length; j++) {
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String str = strArr[j];
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cell.setCellValue(str);
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if (j != strArr.length - 1) {
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cellNum++;
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cell = row.createCell(cellNum);
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}
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}
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} else if (value instanceof Double[]) {
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Double[] douArr = (Double[]) value;
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for (int j = 0; j < douArr.length; j++) {
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Double val = douArr[j];
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// 值不为空则set Value
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if (val != null) {
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cell.setCellValue(val);
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}
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if (j != douArr.length - 1) {
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cellNum++;
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cell = row.createCell(cellNum);
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}
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}
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} else {
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// 其它数据类型都当作字符串简单处理
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String empty = "";
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textValue = value == null ? empty : value.toString();
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}
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if (textValue != null) {
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HSSFRichTextString richString = new HSSFRichTextString(textValue);
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cell.setCellValue(richString);
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}
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return cellNum;
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}
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/*
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* 列头单元格样式
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*/
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private HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {
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// 设置字体
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HSSFFont font = workbook.createFont();
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//设置字体大小
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font.setFontHeightInPoints((short)11);
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//字体加粗
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font.setBold(true);
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//设置字体名字
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font.setFontName("Courier New");
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//设置样式;
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HSSFCellStyle style = workbook.createCellStyle();
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//设置底边框;
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style.setBorderBottom(BorderStyle.THIN);
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//设置底边框颜色;
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style.setBottomBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
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//设置左边框;
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style.setBorderLeft(BorderStyle.THIN);
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//设置左边框颜色;
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style.setLeftBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
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//设置右边框;
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style.setBorderRight(BorderStyle.THIN);
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//设置右边框颜色;
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style.setRightBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
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//设置顶边框;
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style.setBorderTop(BorderStyle.THIN);
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//设置顶边框颜色;
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style.setTopBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
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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(HorizontalAlignment.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(VerticalAlignment.CENTER);
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return style;
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}
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/*
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* 列数据信息单元格样式
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*/
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private HSSFCellStyle getStyle(HSSFWorkbook workbook) {
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// 设置字体
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HSSFFont font = workbook.createFont();
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//设置字体大小
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//font.setFontHeightInPoints((short)10);
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//字体加粗
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//font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
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//设置字体名字
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font.setFontName("Courier New");
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//设置样式;
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HSSFCellStyle style = workbook.createCellStyle();
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//设置底边框;
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style.setBorderBottom(BorderStyle.THIN);
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//设置底边框颜色;
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style.setBottomBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
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//设置左边框;
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style.setBorderLeft(BorderStyle.THIN);
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//设置左边框颜色;
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style.setLeftBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
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//设置右边框;
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style.setBorderRight(BorderStyle.THIN);
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//设置右边框颜色;
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style.setRightBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
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//设置顶边框;
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style.setBorderTop(BorderStyle.THIN);
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//设置顶边框颜色;
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style.setTopBorderColor(HSSFColor.HSSFColorPredefined.BLACK.getIndex());
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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(true);
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//设置水平对齐的样式为居中对齐;
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style.setAlignment(HorizontalAlignment.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(VerticalAlignment.CENTER);
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return style;
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}
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}
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