Spring MVC excel表格下载方法

以你之姓@ 2022-07-25 15:37 200阅读 0赞

Controller类

package cn.xiaoshutou.framework.controller;
    
    import java.io.BufferedInputStream;
    import java.io.BufferedOutputStream;
    import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.Iterator;
    import java.util.List;
    import java.util.Map;
    
    import javax.servlet.ServletOutputStream;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import cn.xiaoshutou.framework.entity.UserLoginList;
    import cn.xiaoshutou.framework.service.UserLoginListService;
    import cn.xiaoshutou.framework.util.Common;
    import cn.xiaoshutou.framework.util.ExcelUtil;
    /**
     * 角色访问记录controller
     * 
     * fileUserLoginListController
     * 创建人:lbm
     * 时间：2016年4月1日-下午3:13:01 
     * @version 1.0.0
     *
     */
    @Controller
    public class fileUserLoginListController {
    	@Autowired
    	private UserLoginListService userLoginListService;
    	private HttpSession session;
    	/**
    	 * 
    	 * 角色访问记录方法
    	 * cn.xiaoshutou.framework.controller 
    	 * 方法名：download
    	 * 创建人：lbm
    	 * 时间：2016年4月1日-下午3:13:24 
    	 * @param request
    	 * @param response
    	 * @return
    	 * @throws IOException String
    	 * @exception 
    	 * @since  1.0.0
    	 */
        @RequestMapping(value="download_useraccess")
        public String download(HttpServletRequest request,HttpServletResponse response) throws IOException{
            String fileName="角色访问记录表";
            //填充数据
            //List<UserLoginList> headList= new ArrayList<UserLoginList>();
            UserLoginList userLogin = new UserLoginList();
            //查询数据库中userlist数据
            List<UserLoginList> headList = userLoginListService.exportAll(userLogin);
            List<Map<String,Object>> list=createExcelRecord(headList,request);
            String columnNames[]={"ID","用户姓名","用户状态","最后登录时间","职能类别","登录次数","登录状态","注册时间"};//列名
            String keys[]    =     {"userId","userName","del","loginTime","roleName","logCount","status","regTime"};//map中的key
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            try {
                ExcelUtil.createWorkBook(list,keys,columnNames).write(os);
            } catch (IOException e) {
                e.printStackTrace();
            }
            byte[] content = os.toByteArray();
            InputStream is = new ByteArrayInputStream(content);
            // 设置response参数，可以打开下载页面
            response.reset();
            response.setContentType("application/vnd.ms-excel;charset=utf-8");
            response.setHeader("Content-Disposition", "attachment;filename="+ new String((fileName + ".xls").getBytes(), "iso-8859-1"));
            ServletOutputStream out = response.getOutputStream();
            BufferedInputStream bis = null;
            BufferedOutputStream bos = null;
            try {
                bis = new BufferedInputStream(is);
                bos = new BufferedOutputStream(out);
                byte[] buff = new byte[2048];
                int bytesRead;
                // Simple read/write loop.
                while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
                    bos.write(buff, 0, bytesRead);
                }
            } catch (final IOException e) {
                throw e;
            } finally {
                if (bis != null)
                    bis.close();
                if (bos != null)
                    bos.close();
            }
            return null;
        }
        private List<UserLoginList> createData() {
            // TODO Auto-generated method stub
            //自己实现
            return null;
        }
        private List<Map<String, Object>> createExcelRecord(List<UserLoginList> userLoginLists,HttpServletRequest request) {
            List<Map<String, Object>> listmap = new ArrayList<Map<String, Object>>();
            Map<String, Object> map = new HashMap<String, Object>();
            map.put("sheetName", "sheet1");
            listmap.add(map);
            UserLoginList userLoginList=null;
            for (int j = 0; j < userLoginLists.size(); j++) {
            	Map<String, Object> mapValue = new HashMap<String, Object>();
            	userLoginList=userLoginLists.get(j);
            	String id = String.valueOf(userLoginList.getUserId());
                mapValue.put("userId", userLoginList.getUserId());
                mapValue.put("userName", userLoginList.getUserName());
                mapValue.put("del", ("1".equals(userLoginList.getDel()) || "离职".equals(userLoginList.getRoleName())) ? "离职" : "在职");
                mapValue.put("loginTime", (Common.formatDateToString(
                		userLoginList.getLoginTime(), Common.DefultDateType)));
                mapValue.put("roleName", userLoginList.getRoleName());
                mapValue.put("logCount", userLoginList.getLogCount());
                if (request.getSession().getAttribute(id) != null){
    				mapValue.put("status", "在线");
    			}else{
    				mapValue.put("status", "离线");
    			}
                mapValue.put("regTime", (Common.formatDateToString(userLoginList.getRegTime(),
    					Common.DefultDateType)));
                listmap.add(mapValue);
            }
            return listmap;
        }
    }

excel导出工具类

<pre name="code" class="java">package cn.xiaoshutou.framework.util;
    import java.util.List;
    import java.util.Map;
    
    import org.apache.poi.hssf.usermodel.HSSFWorkbook;
    import org.apache.poi.ss.usermodel.Cell;
    import org.apache.poi.ss.usermodel.CellStyle;
    import org.apache.poi.ss.usermodel.Font;
    import org.apache.poi.ss.usermodel.IndexedColors;
    import org.apache.poi.ss.usermodel.Row;
    import org.apache.poi.ss.usermodel.Sheet;
    import org.apache.poi.ss.usermodel.Workbook;
    /**
     * 
     * 
     * 导出Excel文档工具类
     * 创建人:lbm
     * 时间：2016年4月1日-下午3:15:07 
     * @version 1.0.0
     *
     */
    public class ExcelUtil {
    
        /**
         * 
         * execl下载工具类
         * cn.xiaoshutou.framework.util 
         * 方法名：createWorkBook
         * 创建人：lbm
         * 时间：2016年4月1日-下午3:14:32 
         * @param list
         * @param keys
         * @param columnNames
         * @return Workbook
         * @exception 
         * @since  1.0.0
         */
        public static Workbook createWorkBook(List<Map<String, Object>> list,String []keys,String columnNames[]) {
            // 创建excel工作簿
            Workbook wb = new HSSFWorkbook();
            // 创建第一个sheet（页），并命名
            Sheet sheet = wb.createSheet(list.get(0).get("sheetName").toString());
            // 手动设置列宽。第一个参数表示要为第几列设；，第二个参数表示列的宽度，n为列高的像素数。
            for(int i=0;i<keys.length;i++){
                sheet.setColumnWidth((short) i, (short) (35.7 * 150));
            }
    
            // 创建第一行
            Row row = sheet.createRow((short) 0);
    
            // 创建两种单元格格式
            CellStyle cs = wb.createCellStyle();
            CellStyle cs2 = wb.createCellStyle();
    
            // 创建两种字体
            Font f = wb.createFont();
            Font f2 = wb.createFont();
    
            // 创建第一种字体样式（用于列名）
            f.setFontHeightInPoints((short) 10);
            f.setColor(IndexedColors.BLACK.getIndex());
            f.setBoldweight(Font.BOLDWEIGHT_BOLD);
    
            // 创建第二种字体样式（用于值）
            f2.setFontHeightInPoints((short) 10);
            f2.setColor(IndexedColors.BLACK.getIndex());
    
    //        Font f3=wb.createFont();
    //        f3.setFontHeightInPoints((short) 10);
    //        f3.setColor(IndexedColors.RED.getIndex());
    
            // 设置第一种单元格的样式（用于列名）
            cs.setFont(f);
            cs.setBorderLeft(CellStyle.BORDER_THIN);
            cs.setBorderRight(CellStyle.BORDER_THIN);
            cs.setBorderTop(CellStyle.BORDER_THIN);
            cs.setBorderBottom(CellStyle.BORDER_THIN);
            cs.setAlignment(CellStyle.ALIGN_CENTER);
    
            // 设置第二种单元格的样式（用于值）
            cs2.setFont(f2);
            cs2.setBorderLeft(CellStyle.BORDER_THIN);
            cs2.setBorderRight(CellStyle.BORDER_THIN);
            cs2.setBorderTop(CellStyle.BORDER_THIN);
            cs2.setBorderBottom(CellStyle.BORDER_THIN);
            cs2.setAlignment(CellStyle.ALIGN_CENTER);
            //设置列名
            for(int i=0;i<columnNames.length;i++){
                Cell cell = row.createCell(i);
                cell.setCellValue(columnNames[i]);
                cell.setCellStyle(cs);
            }
            //设置每行每列的值
            for (short i = 1; i < list.size(); i++) {
                // Row 行,Cell 方格 , Row 和 Cell 都是从0开始计数的
                // 创建一行，在页sheet上
                Row row1 = sheet.createRow((short) i);
                // 在row行上创建一个方格
                for(short j=0;j<keys.length;j++){
                    Cell cell = row1.createCell(j);
                    cell.setCellValue(list.get(i).get(keys[j]) == null?" ": list.get(i).get(keys[j]).toString());
                    cell.setCellStyle(cs2);
                }
            }
            return wb;
        }
    
    }

jsp页面按钮调用方法

<pre name="code" class="javascript">function download() {
    		var url = "${pageContext.servletContext.contextPath }/download_useraccess.html";
    			
    			window.open(url);
    	}