spring boot excel导出

package com.xiaopotian.Controller; import javax.servlet.http.HttpServletResponse; import java.awt.*; import java.io.OutputStream; import java.util.List; import org.apache.poi.ss.usermodel.*; import org.apache.poi.ss.usermodel.Font; import org.apache.poi.xssf.usermodel.XSSFCellStyle; import org.apache.poi.xssf.usermodel.XSSFColor; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.apache.poi.xssf.usermodel.extensions.XSSFCellBorder.BorderSide; import java.awt.Color; import java.net.URLEncoder; /** * Created by zouLu on 2017-12-14. */ public class ExportExcelUtils { public static void exportExcel(HttpServletResponse response, String fileName, ExcelData data) throws Exception { // 告诉浏览器用什么软件可以打开此文件 response.setHeader("content-Type", "application/vnd.ms-excel"); // 下载文件的默认名称 response.setHeader("Content-Disposition", "attachment;filename="+URLEncoder.encode(fileName, "utf-8")); exportExcel(data, response.getOutputStream()); } public static void exportExcel(ExcelData data, OutputStream out) throws Exception { XSSFWorkbook wb = new XSSFWorkbook(); try { String sheetName = data.getName(); if (null == sheetName) { sheetName = "Sheet1"; } XSSFSheet sheet = wb.createSheet(sheetName); writeExcel(wb, sheet, data); wb.write(out); } finally { wb.close(); } } private static void writeExcel(XSSFWorkbook wb, Sheet sheet, ExcelData data) { int rowIndex = 0; rowIndex = writeTitlesToExcel(wb, sheet, data.getTitles()); writeRowsToExcel(wb, sheet, data.getRows(), rowIndex); autoSizeColumns(sheet, data.getTitles().size() + 1); } private static int writeTitlesToExcel(XSSFWorkbook wb, Sheet sheet, List<String> titles) { int rowIndex = 0; int colIndex = 0; Font titleFont = wb.createFont(); titleFont.setFontName("simsun"); titleFont.setBold(true); // titleFont.setFontHeightInPoints((short) 14); titleFont.setColor(IndexedColors.BLACK.index); XSSFCellStyle titleStyle = wb.createCellStyle(); titleStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER); titleStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER); titleStyle.setFillForegroundColor(new XSSFColor(new Color(182, 184, 192))); titleStyle.setFillPattern(XSSFCellStyle.SOLID_FOREGROUND); titleStyle.setFont(titleFont); setBorder(titleStyle, BorderStyle.THIN, new XSSFColor(new Color(0, 0, 0))); Row titleRow = sheet.createRow(rowIndex); // titleRow.setHeightInPoints(25); colIndex = 0; for (String field : titles) { Cell cell = titleRow.createCell(colIndex); cell.setCellValue(field); cell.setCellStyle(titleStyle); colIndex++; } rowIndex++; return rowIndex; } private static int writeRowsToExcel(XSSFWorkbook wb, Sheet sheet, List<List<Object>> rows, int rowIndex) { int colIndex = 0; Font dataFont = wb.createFont(); dataFont.setFontName("simsun"); // dataFont.setFontHeightInPoints((short) 14); dataFont.setColor(IndexedColors.BLACK.index); XSSFCellStyle dataStyle = wb.createCellStyle(); dataStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER); dataStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER); dataStyle.setFont(dataFont); setBorder(dataStyle, BorderStyle.THIN, new XSSFColor(new Color(0, 0, 0))); for (List<Object> rowData : rows) { Row dataRow = sheet.createRow(rowIndex); // dataRow.setHeightInPoints(25); colIndex = 0; for (Object cellData : rowData) { Cell cell = dataRow.createCell(colIndex); if (cellData != null) { cell.setCellValue(cellData.toString()); } else { cell.setCellValue(""); } cell.setCellStyle(dataStyle); colIndex++; } rowIndex++; } return rowIndex; } private static void autoSizeColumns(Sheet sheet, int columnNumber) { for (int i = 0; i < columnNumber; i++) { int orgWidth = sheet.getColumnWidth(i); sheet.autoSizeColumn(i, true); int newWidth = (int) (sheet.getColumnWidth(i) + 100); if (newWidth > orgWidth) { sheet.setColumnWidth(i, newWidth); } else { sheet.setColumnWidth(i, orgWidth); } } } private static void setBorder(XSSFCellStyle style, BorderStyle border, XSSFColor color) { style.setBorderTop(border); style.setBorderLeft(border); style.setBorderRight(border); style.setBorderBottom(border); style.setBorderColor(BorderSide.TOP, color); style.setBorderColor(BorderSide.LEFT, color); style.setBorderColor(BorderSide.RIGHT, color); style.setBorderColor(BorderSide.BOTTOM, color); } }