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本文實(shí)例為大家分享了java使用poi導(dǎo)出Excel的具體代碼,供大家參考,具體內(nèi)容如下
package hyss.util.common; import java.io.IOException; import java.io.OutputStream; import java.net.URLEncoder; import java.util.ArrayList; import java.util.List; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFCellStyle; import org.apache.poi.hssf.usermodel.HSSFFont; import org.apache.poi.hssf.usermodel.HSSFRichTextString; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.hssf.util.HSSFColor; import org.apache.poi.ss.util.CellRangeAddress; /** * Excel導(dǎo)出工具類 * @author ts */ public class ExportExcelUtil { //顯示的導(dǎo)出表的標(biāo)題 private String title; //導(dǎo)出表的列名 private String[] rowName ; private List<Object[]> dataList = new ArrayList<Object[]>(); // HttpServletResponse response; //構(gòu)造方法,傳入要導(dǎo)出的數(shù)據(jù) public ExportExcelUtil(String title,String[] rowName,List<Object[]> dataList){ this.dataList = dataList; this.rowName = rowName; this.title = title; } /* * 導(dǎo)出數(shù)據(jù) * */ public void export() throws Exception{ try{ HSSFWorkbook workbook = new HSSFWorkbook(); // 創(chuàng)建工作簿對(duì)象 HSSFSheet sheet = workbook.createSheet(title); // 創(chuàng)建工作表 // 產(chǎn)生表格標(biāo)題行 HSSFRow rowm = sheet.createRow(0); HSSFCell cellTiltle = rowm.createCell(0); rowm.setHeightInPoints(25); //設(shè)置標(biāo)題行默認(rèn)行高 //sheet樣式定義【getColumnTopStyle()/getStyle()均為自定義方法 - 在下面 - 可擴(kuò)展】 HSSFCellStyle columnTitleStyle = this.getTitleTopStyle(workbook);//獲取標(biāo)題行樣式 HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook); //獲取列頭樣式對(duì)象 HSSFCellStyle style = this.getStyle(workbook); //單元格樣式對(duì)象 sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (rowName.length-1))); cellTiltle.setCellStyle(columnTitleStyle); cellTiltle.setCellValue(title); // 定義所需列數(shù) int columnNum = rowName.length; HSSFRow rowRowName = sheet.createRow(2); // 在索引2的位置創(chuàng)建行(最頂端的行開始的第二行) rowRowName.setHeightInPoints(25); //將列頭設(shè)置默認(rèn)行高 // 將列頭設(shè)置到sheet的單元格中 for(int n=0;n<columnNum;n++){ HSSFCell cellRowName = rowRowName.createCell(n); //創(chuàng)建列頭對(duì)應(yīng)個(gè)數(shù)的單元格 cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING); //設(shè)置列頭單元格的數(shù)據(jù)類型 HSSFRichTextString text = new HSSFRichTextString(rowName[n]); cellRowName.setCellValue(text); //設(shè)置列頭單元格的值 cellRowName.setCellStyle(columnTopStyle); //設(shè)置列頭單元格樣式 } //將查詢出的數(shù)據(jù)設(shè)置到sheet對(duì)應(yīng)的單元格中 for(int i=0;i<dataList.size();i++){ Object[] obj = dataList.get(i);//遍歷每個(gè)對(duì)象 HSSFRow row = sheet.createRow(i+3);//創(chuàng)建所需的行數(shù) row.setHeightInPoints(20); //將創(chuàng)建出的行設(shè)置默認(rèn)行高 for(int j=0; j<obj.length; j++){ HSSFCell cell = null; //設(shè)置單元格的數(shù)據(jù)類型 if(j == 0){ cell = row.createCell(j,HSSFCell.CELL_TYPE_NUMERIC); cell.setCellValue(i+1); }else{ cell = row.createCell(j,HSSFCell.CELL_TYPE_STRING); if(!"".equals(obj[j]) && obj[j] != null){ cell.setCellValue(obj[j].toString()); //設(shè)置單元格的值 } } cell.setCellStyle(style); //設(shè)置單元格樣式 } } //讓列寬隨著導(dǎo)出的列長自動(dòng)適應(yīng) for (int colNum = 0; colNum < columnNum; colNum++) { int columnWidth = sheet.getColumnWidth(colNum) / 256; for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) { HSSFRow currentRow; //當(dāng)前行未被使用過 if (sheet.getRow(rowNum) == null) { currentRow = sheet.createRow(rowNum); } else { currentRow = sheet.getRow(rowNum); } if (currentRow.getCell(colNum) != null) { HSSFCell currentCell = currentRow.getCell(colNum); if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) { int length = currentCell.getStringCellValue().getBytes().length; if (columnWidth < length) { columnWidth = length; } } } } if(colNum == 0){ sheet.setColumnWidth(colNum, (columnWidth-2) * 256); }else{ sheet.setColumnWidth(colNum, (columnWidth+4) * 256); } } if(workbook !=null){ try { String fileName = title + DateTime.getSystemDateTime("yyyy-MM-dd") + ".xls"; //因 response已經(jīng)封裝成工具類所以下面這段代碼注釋掉 // response =ServletActionContext.getResponse(); // response.setContentType("APPLICATION/OCTET-STREAM"); // response.setHeader("Content-Disposition", headStr); // OutputStream out = response.getOutputStream(); //解決中文亂碼 Struts2Util.getResponse().setCharacterEncoding("UTF-8"); //解決中文亂碼 Struts2Util.getResponse().setHeader("Content-Disposition", "attachment;filename*=UTF-8''" + URLEncoder.encode(fileName,"UTF-8")); //文件下載 Struts2Util.getResponse().setContentType("APPLICATION/OCTET-STREAM"); OutputStream out = Struts2Util.getResponse().getOutputStream(); workbook.write(out); } catch (IOException e) { e.printStackTrace(); } } }catch(Exception e){ e.printStackTrace(); } } /* * 設(shè)置標(biāo)題樣式 */ public HSSFCellStyle getTitleTopStyle(HSSFWorkbook workbook) { // 設(shè)置字體 HSSFFont font = workbook.createFont(); //設(shè)置字體大小 font.setFontHeightInPoints((short)24); //字體加粗 font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); //設(shè)置字體名字 font.setFontName("宋體"); //設(shè)置樣式; HSSFCellStyle style = workbook.createCellStyle(); //設(shè)置底邊框; style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //設(shè)置底邊框顏色; style.setBottomBorderColor(HSSFColor.BLACK.index); //設(shè)置左邊框; style.setBorderLeft(HSSFCellStyle.BORDER_THIN); //設(shè)置左邊框顏色; style.setLeftBorderColor(HSSFColor.BLACK.index); //設(shè)置右邊框; style.setBorderRight(HSSFCellStyle.BORDER_THIN); //設(shè)置右邊框顏色; style.setRightBorderColor(HSSFColor.BLACK.index); //設(shè)置頂邊框; style.setBorderTop(HSSFCellStyle.BORDER_THIN); //設(shè)置頂邊框顏色; style.setTopBorderColor(HSSFColor.BLACK.index); //在樣式用應(yīng)用設(shè)置的字體; style.setFont(font); //設(shè)置自動(dòng)換行; style.setWrapText(false); //設(shè)置水平對(duì)齊的樣式為居中對(duì)齊; style.setAlignment(HSSFCellStyle.ALIGN_CENTER); //設(shè)置垂直對(duì)齊的樣式為居中對(duì)齊; style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); return style; } /* * 列頭單元格樣式 */ public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) { // 設(shè)置字體 HSSFFont font = workbook.createFont(); //設(shè)置字體大小 font.setFontHeightInPoints((short)11); //字體加粗 font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); //設(shè)置字體名字 font.setFontName("宋體"); //設(shè)置樣式; HSSFCellStyle style = workbook.createCellStyle(); //設(shè)置底邊框; style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //設(shè)置底邊框顏色; style.setBottomBorderColor(HSSFColor.BLACK.index); //設(shè)置左邊框; style.setBorderLeft(HSSFCellStyle.BORDER_THIN); //設(shè)置左邊框顏色; style.setLeftBorderColor(HSSFColor.BLACK.index); //設(shè)置右邊框; style.setBorderRight(HSSFCellStyle.BORDER_THIN); //設(shè)置右邊框顏色; style.setRightBorderColor(HSSFColor.BLACK.index); //設(shè)置頂邊框; style.setBorderTop(HSSFCellStyle.BORDER_THIN); //設(shè)置頂邊框顏色; style.setTopBorderColor(HSSFColor.BLACK.index); //在樣式用應(yīng)用設(shè)置的字體; style.setFont(font); //設(shè)置自動(dòng)換行; style.setWrapText(false); //設(shè)置水平對(duì)齊的樣式為居中對(duì)齊; style.setAlignment(HSSFCellStyle.ALIGN_CENTER); //設(shè)置垂直對(duì)齊的樣式為居中對(duì)齊; style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); return style; } /* * 列數(shù)據(jù)信息單元格樣式 */ public HSSFCellStyle getStyle(HSSFWorkbook workbook) { // 設(shè)置字體 HSSFFont font = workbook.createFont(); //設(shè)置字體大小 //font.setFontHeightInPoints((short)10); //字體加粗 //font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); //設(shè)置字體名字 font.setFontName("宋體"); //設(shè)置樣式; HSSFCellStyle style = workbook.createCellStyle(); //設(shè)置底邊框; style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //設(shè)置底邊框顏色; style.setBottomBorderColor(HSSFColor.BLACK.index); //設(shè)置左邊框; style.setBorderLeft(HSSFCellStyle.BORDER_THIN); //設(shè)置左邊框顏色; style.setLeftBorderColor(HSSFColor.BLACK.index); //設(shè)置右邊框; style.setBorderRight(HSSFCellStyle.BORDER_THIN); //設(shè)置右邊框顏色; style.setRightBorderColor(HSSFColor.BLACK.index); //設(shè)置頂邊框; style.setBorderTop(HSSFCellStyle.BORDER_THIN); //設(shè)置頂邊框顏色; style.setTopBorderColor(HSSFColor.BLACK.index); //在樣式用應(yīng)用設(shè)置的字體; style.setFont(font); //設(shè)置自動(dòng)換行; style.setWrapText(false); //設(shè)置水平對(duì)齊的樣式為居中對(duì)齊; // style.setAlignment(HSSFCellStyle.ALIGN_CENTER); //設(shè)置垂直對(duì)齊的樣式為居中對(duì)齊; // style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); return style; } }
實(shí)現(xiàn)方法
/* * 實(shí)現(xiàn)方法 */ public void exportExcel() throws Exception{ String title = "測試"; String[] rowsName = new String[]{"序號(hào)","列頭1","列頭2","列頭3","列頭4","列頭5"}; List<Object[]> dataList = new ArrayList<Object[]>(); Object[] objs = null; for (int i = 0; i < 10; i++) { objs = new Object[rowsName.length]; objs[0] = i; objs[1] = "測試1"; objs[2] = "測試2"; objs[3] = "測試3"; objs[4] = "測試4"; objs[5] = "測試5"; dataList.add(objs); } ExportExcelUtil ex = new ExportExcelUtil(title, rowsName, dataList); ex.export(); }
以上就是本文的全部內(nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持億速云。
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