• 后台数据download成excel的方法(controller/action)


    jsp页面端

    <a href="/portal/server/importExec" title="Data Download">
    	<img src="${pageContext.request.contextPath}/style/images/excel6.jpg"   width=20px height=20px style="padding-top:15px"/>
    </a>
    

    controller端处理

         @RequestMapping(value = "importExec", method = RequestMethod.GET)
    	@ResponseBody
    	public void importExec(HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException {
    		String fname = "serverlist";
    		response.reset();// 清空输出流
    		response.setHeader("Content-disposition","attachment; filename=" + fname + ".xls");// 设定输出文件头
    		response.setContentType("application/msexcel");//EXCEL格式  Microsoft excel
    		//创建workbook   
            HSSFWorkbook workbook = new HSSFWorkbook(); 
            HSSFCellStyle style = workbook.createCellStyle();  
    	    style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式  
    	    HSSFFont f  = workbook.createFont();  
    	   // f.setColor(HSSFColor.RED.index);
    	    f.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);//加粗 
    	    style.setFont(f);
    	    style.setFillForegroundColor(HSSFColor.LIME.index);   
    	    style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
    
            //创建sheet页  
            HSSFSheet sheet = workbook.createSheet("Server Info.");   
            //创建单元格  
            HSSFRow row = sheet.createRow(0);   
            HSSFCell c0 = row.createCell(0);   
            c0.setCellValue(new HSSFRichTextString("No"));   
            c0.setCellStyle(style);  
    
            HSSFCell c1 = row.createCell(1);   
            c1.setCellValue(new HSSFRichTextString("IP")); 
            c1.setCellStyle(style);  
    
            HSSFCell c2 = row.createCell(2);   
            c2.setCellValue(new HSSFRichTextString("Server Name")); 
            c2.setCellStyle(style);  
    
            HSSFCell c3 = row.createCell(3);   
            c3.setCellValue(new HSSFRichTextString("Server Usage"));  
            c3.setCellStyle(style);  
    
            HSSFCell c4 = row.createCell(4);   
            c4.setCellValue(new HSSFRichTextString("CPU")); 
            c4.setCellStyle(style);  
    
            HSSFCell c5 = row.createCell(6);   
            c5.setCellValue(new HSSFRichTextString("Memory")); 
            c5.setCellStyle(style);  
            
            HSSFCell c6 = row.createCell(8);   
            c6.setCellValue(new HSSFRichTextString("HDD")); 
            c6.setCellStyle(style);  
            
            HSSFCell c7 = row.createCell(11);   
            c7.setCellValue(new HSSFRichTextString("OS Version")); 
            c7.setCellStyle(style);  
            
            HSSFCell c8 = row.createCell(12);   
            c8.setCellValue(new HSSFRichTextString("Manager")); 
            c8.setCellStyle(style);
    
            HSSFRow row1 = sheet.createRow(1);   
            HSSFCell c9 = row1.createCell(4); 
            c9.setCellValue(new HSSFRichTextString("Count"));   
            c9.setCellStyle(style);  
            HSSFCell c10 = row1.createCell(5); 
            c10.setCellValue(new HSSFRichTextString("Core Num."));   
            c10.setCellStyle(style);  
            HSSFCell c11 = row1.createCell(6); 
            c11.setCellValue(new HSSFRichTextString("Count"));   
            c11.setCellStyle(style);  
            HSSFCell c12 = row1.createCell(7); 
            c12.setCellValue(new HSSFRichTextString("Size (GB)"));   
            c12.setCellStyle(style); 
            HSSFCell c13 = row1.createCell(8); 
            c13.setCellValue(new HSSFRichTextString("Count"));   
            c13.setCellStyle(style);  
            HSSFCell c14 = row1.createCell(9); 
            c14.setCellValue(new HSSFRichTextString("Type"));   
            c14.setCellStyle(style);  
            HSSFCell c15 = row1.createCell(10); 
            c15.setCellValue(new HSSFRichTextString("Size (GB)"));   
            c15.setCellStyle(style);    
            sheet.addMergedRegion(new CellRangeAddress(0, 1,(short)0,  (short)0));
            sheet.addMergedRegion(new CellRangeAddress(0, 1,(short)1,  (short)1));
            sheet.addMergedRegion(new CellRangeAddress(0, 1,(short)2,  (short)2));
            sheet.addMergedRegion(new CellRangeAddress(0, 1,(short)3,  (short)3));
            sheet.addMergedRegion(new CellRangeAddress(0, 0,(short)4,  (short)5));
            sheet.addMergedRegion(new CellRangeAddress(0, 0,(short)6,  (short)7));
            sheet.addMergedRegion(new CellRangeAddress(0, 0,(short)8,  (short)10));
            sheet.addMergedRegion(new CellRangeAddress(0, 1,(short)11,  (short)11));
            sheet.addMergedRegion(new CellRangeAddress(0, 1,(short)12,  (short)12));
           
            List<Server> serverList =  serverService.findServerList("");
            for(int i=0;i<serverList.size();i++){
            	row=sheet.createRow((int)i+2);
            	Server server = (Server)serverList.get(i);
            	row.createCell((short)0).setCellValue(new HSSFRichTextString(i+1+""));
            	row.createCell((short)1).setCellValue(new HSSFRichTextString(server.getIp()));
            	row.createCell((short)2).setCellValue(new HSSFRichTextString(server.getName()));
            	row.createCell((short)3).setCellValue(new HSSFRichTextString(server.getUseFor()));
            	row.createCell((short)4).setCellValue(new HSSFRichTextString(String.valueOf(server.getCpuCount())));
            	row.createCell((short)5).setCellValue(new HSSFRichTextString(server.getCpuNumber()+""));
            	row.createCell((short)6).setCellValue(new HSSFRichTextString(server.getMemCount()+""));
            	row.createCell((short)7).setCellValue(new HSSFRichTextString(server.getMemSize()));
            	row.createCell((short)8).setCellValue(new HSSFRichTextString(server.getHddCount()+""));
            	row.createCell((short)9).setCellValue(new HSSFRichTextString(server.getHddType()));
            	row.createCell((short)10).setCellValue(new HSSFRichTextString(server.getHddSize()));
            	row.createCell((short)11).setCellValue(new HSSFRichTextString(server.getOsVersion()));
            	row.createCell((short)12).setCellValue(new HSSFRichTextString(server.getManager()));
            }
            
            try{   
    	     workbook.write(response.getOutputStream());  
    	}  
    	catch (Exception e){  
    	    e.printStackTrace();  
    	}  
    }
    

    action的处理方法:

    jsp端

     	 <a href="DownDefectServlet?projectname=<%=request.getParameter("projectname")%>&item=<%=request.getParameter("item")%>"  title="Data Download">
    			<img src="${pageContext.request.contextPath}/images/excel6.jpg"   width=20px height=20px style="padding-top:15px"/>
    	 </a>
    

     web.xml加入

    <servlet>		
    	<servlet-name>DownDefectServlet</servlet-name>
        <servlet-class>net.nw.servlet.DownDefectServlet</servlet-class>
      </servlet>
      <servlet-mapping>
        <servlet-name>DownDefectServlet</servlet-name>
        <url-pattern>/DownDefectServlet</url-pattern>
      </servlet-mapping>
    

     后台servlet处理

    	public void doGet(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    		
    		//int currpage = Integer.parseInt(request.getParameter("currpage")==null?"1":request.getParameter("currpage"));
    		String projectname=request.getParameter("projectname");		
    		String item=request.getParameter("item");
    		String where=null;
    		int total=0;
    		if ("".equals(item)){			
    			where="where PROJECTNAME like '%"+projectname+"%'  AND STATUS != 'PLM_Deleted' and STATUS != 'Not_Related' and PLMFLAG='Y'" ;
    		}
    		else { //Opened
    			where="where PROJECTNAME like '%"+projectname+"%'  AND STATUS != 'PLM_Deleted' AND STATUS != 'Closed' AND STATUS != 'Resolved' and STATUS != 'Not_Related' and PLMFLAG='Y'" ;
    		}
    			
    		
    		
    		response = ServletActionContext.getResponse();
    		String fname = "defectlist";
    		response.reset();// 清空输出流
    		response.setHeader("Content-disposition","attachment; filename=" + fname + ".xls");// 设定输出文件头
    		response.setContentType("application/msexcel");//EXCEL格式  Microsoft excel
    		//创建workbook   
            HSSFWorkbook workbook = new HSSFWorkbook(); 
            HSSFCellStyle style = workbook.createCellStyle();  
    	    style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式  
    	    HSSFFont f  = workbook.createFont();  
    	    f.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);//加粗 
    	    style.setFont(f);
    	    style.setFillForegroundColor(HSSFColor.LIME.index);   
    	    style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
    
            //创建sheet页  
            HSSFSheet sheet = workbook.createSheet("Defect List");   
            //创建单元格  
            HSSFRow row = sheet.createRow(0);   
            HSSFCell c0 = row.createCell(0);   
            c0.setCellValue(new HSSFRichTextString("ID"));   
            c0.setCellStyle(style); 
            HSSFCell c1 = row.createCell(1);   
            c1.setCellValue(new HSSFRichTextString("Headline"));   
            c1.setCellStyle(style); 
            HSSFCell c2 = row.createCell(2);   
            c2.setCellValue(new HSSFRichTextString("Priority"));   
            c2.setCellStyle(style); 
            HSSFCell c3 = row.createCell(3);   
            c3.setCellValue(new HSSFRichTextString("ModelCode"));   
            c3.setCellStyle(style); 
            HSSFCell c4 = row.createCell(4);   
            c4.setCellValue(new HSSFRichTextString("Sub Component Name"));   
            c4.setCellStyle(style); 
            HSSFCell c5 = row.createCell(5);   
            c5.setCellValue(new HSSFRichTextString("Plat. Dev."));   
            c5.setCellStyle(style); 
            HSSFCell c6 = row.createCell(6);   
            c6.setCellValue(new HSSFRichTextString("Prod. Dev."));   
            c6.setCellStyle(style); 
            HSSFCell c7 = row.createCell(7);   
            c7.setCellValue(new HSSFRichTextString("Defect Solved Ver."));   
            c7.setCellStyle(style); 
            HSSFCell c8 = row.createCell(8);   
            c8.setCellValue(new HSSFRichTextString("Requester"));   
            c8.setCellStyle(style); 
            HSSFCell c9 = row.createCell(9);   
            c9.setCellValue(new HSSFRichTextString("Status"));   
            c9.setCellStyle(style); 
            HSSFCell c10 = row.createCell(10);   
            c10.setCellValue(new HSSFRichTextString("State Owner"));   
            c10.setCellStyle(style); 
            
            ResultSet rs=null;
    
    		total=this.getResultCount_1(where);
    		rs = this.getResultSet_1(where);
    		int i = 0;
    		try {
    			while (rs.next()) {
    					row=sheet.createRow((int)++i);
    					row.createCell((short)0).setCellValue(new HSSFRichTextString(rs.getString("ID")));
    					row.createCell((short)1).setCellValue(new HSSFRichTextString(rs.getString("HEADLINE").replaceAll("<", " <").replaceAll(">", " >")));
    					row.createCell((short)2).setCellValue(new HSSFRichTextString(rs.getString("SERIOUSNESS").replaceAll("<", " <").replaceAll(">", " >")));
    					row.createCell((short)3).setCellValue(new HSSFRichTextString(rs.getString("MODELCODE").replaceAll("<", " <").replaceAll(">", " >")));
    					row.createCell((short)4).setCellValue(new HSSFRichTextString(rs.getString("SUBCOMPONENTNAME").replaceAll("<", " <").replaceAll(">", " >")));
    					row.createCell((short)5).setCellValue(new HSSFRichTextString(rs.getString("PLATFORMDEVELOPER").replaceAll("<", " <").replaceAll(">", " >")));
    					row.createCell((short)6).setCellValue(new HSSFRichTextString(rs.getString("PRODUCTDEVELOPER").replaceAll("<", " <").replaceAll(">", " >")));
    					row.createCell((short)7).setCellValue(new HSSFRichTextString(rs.getString("DEFECTSOLVEDVERSION").replaceAll("<", " <").replaceAll(">", " >")));
    					row.createCell((short)8).setCellValue(new HSSFRichTextString(rs.getString("REQUESTER").replaceAll("<", " <").replaceAll(">", " >")));
    					row.createCell((short)9).setCellValue(new HSSFRichTextString(rs.getString("STATUS").replaceAll("<", " <").replaceAll(">", " >")));
    					row.createCell((short)10).setCellValue(new HSSFRichTextString(rs.getString("STATEOWNER").replaceAll("<", " <").replaceAll(">", " >")));
    
    				}
    				rs.close();
    		}catch (SQLException e) {
    			System.out.println(e.getMessage());
    		}
    		
    		try {
    			 workbook.write(response.getOutputStream());  
            } 
    		catch (Exception e){  
    	        e.printStackTrace();  
    	    }  
    	}
    
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  • 原文地址:https://www.cnblogs.com/wujixing/p/5923049.html
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