ssm中实现excle导入导出

1 pom。xml

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>3.14-beta1</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml-schemas</artifactId>
    <version>3.14-beta1</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>3.14-beta1</version>
</dependency>
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.2</version>
</dependency>

2 ExcelBean

public class ExcelBean implements  java.io.Serializable{
    private String headTextName; //列头（标题）名
    private String propertyName; //对应字段名
    private Integer cols; //合并单元格数
    private XSSFCellStyle cellStyle;
    public ExcelBean(){
    }
    public ExcelBean(String headTextName, String propertyName){
        this.headTextName = headTextName;
        this.propertyName = propertyName;
    }
    public ExcelBean(String headTextName, String propertyName, Integer cols) {
        super();
        this.headTextName = headTextName;
        this.propertyName = propertyName;
        this.cols = cols;
    }
    /* 省略了get和set方法 */
}

3 excleutils

public class ExcelUtil {
    private final static String excel2003L =".xls";    //2003- 版本的excel
    private final static String excel2007U =".xlsx";   //2007+ 版本的excel
    /**
     * Excel导入
     */
    public static  List<List<Object>> getBankListByExcel(InputStream in, String fileName) throws Exception{
        List<List<Object>> list = null;
        //创建Excel工作薄
        Workbook work = getWorkbook(in,fileName);
        if(null == work){
            throw new Exception("创建Excel工作薄为空！");
        }
        Sheet sheet = null;
        Row row = null;
        Cell cell = null;
        list = new ArrayList<List<Object>>();
        //遍历Excel中所有的sheet
        for (int i = 0; i < work.getNumberOfSheets(); i++) {
            sheet = work.getSheetAt(i);
            if(sheet==null){continue;}
            //遍历当前sheet中的所有行
            //包涵头部，所以要小于等于最后一列数,这里也可以在初始值加上头部行数，以便跳过头部
            for (int j = sheet.getFirstRowNum(); j <= sheet.getLastRowNum(); j++) {
                //读取一行
                row = sheet.getRow(j);
                //去掉空行和表头
                if(row==null||row.getFirstCellNum()==j){continue;}
                //遍历所有的列
                List<Object> li = new ArrayList<Object>();
                for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {
                    cell = row.getCell(y);
                    li.add(getCellValue(cell));
                }
                list.add(li);
            }
        }
        return list;
    }
    /**
     * 描述：根据文件后缀，自适应上传文件的版本
     */
    public static  Workbook getWorkbook(InputStream inStr,String fileName) throws Exception{
        Workbook wb = null;
        String fileType = fileName.substring(fileName.lastIndexOf("."));
        if(excel2003L.equals(fileType)){
            wb = new HSSFWorkbook(inStr);  //2003-
        }else if(excel2007U.equals(fileType)){
            wb = new XSSFWorkbook(inStr);  //2007+
        }else{
            throw new Exception("解析的文件格式有误！");
        }
        return wb;
    }
    /**
     * 描述：对表格中数值进行格式化
     */
    public static  Object getCellValue(Cell cell){
        Object value = null;
        DecimalFormat df = new DecimalFormat("0");  //格式化字符类型的数字
        SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd");  //日期格式化
        DecimalFormat df2 = new DecimalFormat("0.00");  //格式化数字
        switch (cell.getCellType()) {
            case Cell.CELL_TYPE_STRING:
                value = cell.getRichStringCellValue().getString();
                break;
            case Cell.CELL_TYPE_NUMERIC:
                if("General".equals(cell.getCellStyle().getDataFormatString())){
                    value = df.format(cell.getNumericCellValue());
                }else if("m/d/yy".equals(cell.getCellStyle().getDataFormatString())){
                    value = sdf.format(cell.getDateCellValue());
                }else{
                    value = df2.format(cell.getNumericCellValue());
                }
                break;
            case Cell.CELL_TYPE_BOOLEAN:
                value = cell.getBooleanCellValue();
                break;
            case Cell.CELL_TYPE_BLANK:
                value = "";
                break;
            default:
                break;
        }
        return value;
    }
    /**
     * 导入Excel表结束
     * 导出Excel表开始
     * @param sheetName 工作簿名称
     * @param clazz  数据源model类型
     * @param objs   excel标题列以及对应model字段名
     * @param map  标题列行数以及cell字体样式
     */
    public static XSSFWorkbook createExcelFile(Class clazz, List objs, Map<Integer, List<ExcelBean>> map, String sheetName) throws 
IllegalArgumentException,IllegalAccessException,InvocationTargetException,
ClassNotFoundException, IntrospectionException, ParseException {
        // 创建新的Excel工作簿
        XSSFWorkbook workbook = new XSSFWorkbook();
        // 在Excel工作簿中建一工作表，其名为缺省值, 也可以指定Sheet名称
        XSSFSheet sheet = workbook.createSheet(sheetName);
        // 以下为excel的字体样式以及excel的标题与内容的创建，下面会具体分析;
        createFont(workbook); //字体样式
        createTableHeader(sheet, map); //创建标题（头）
        createTableRows(sheet, map, objs, clazz); //创建内容
        return workbook;
    }
    private static XSSFCellStyle fontStyle;
    private static XSSFCellStyle fontStyle2;
    public static void createFont(XSSFWorkbook workbook) {
        // 表头
        fontStyle = workbook.createCellStyle();
        XSSFFont font1 = workbook.createFont();
        font1.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD);
        font1.setFontName("黑体");
        font1.setFontHeightInPoints((short) 14);// 设置字体大小
        fontStyle.setFont(font1);
        fontStyle.setBorderBottom(XSSFCellStyle.BORDER_THIN); // 下边框
        fontStyle.setBorderLeft(XSSFCellStyle.BORDER_THIN);// 左边框
        fontStyle.setBorderTop(XSSFCellStyle.BORDER_THIN);// 上边框
        fontStyle.setBorderRight(XSSFCellStyle.BORDER_THIN);// 右边框
        fontStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER); // 居中
        // 内容
        fontStyle2=workbook.createCellStyle();
        XSSFFont font2 = workbook.createFont();
        font2.setFontName("宋体");
        font2.setFontHeightInPoints((short) 10);// 设置字体大小
        fontStyle2.setFont(font2);
        fontStyle2.setBorderBottom(XSSFCellStyle.BORDER_THIN); // 下边框
        fontStyle2.setBorderLeft(XSSFCellStyle.BORDER_THIN);// 左边框
        fontStyle2.setBorderTop(XSSFCellStyle.BORDER_THIN);// 上边框
        fontStyle2.setBorderRight(XSSFCellStyle.BORDER_THIN);// 右边框
        fontStyle2.setAlignment(XSSFCellStyle.ALIGN_CENTER); // 居中
    }
    /**
     * 根据ExcelMapping 生成列头（多行列头）
     *
     * @param sheet 工作簿
     * @param map 每行每个单元格对应的列头信息
     */
    public static final void createTableHeader(XSSFSheet sheet, Map<Integer, List<ExcelBean>> map) {
        int startIndex=0;//cell起始位置
        int endIndex=0;//cell终止位置
        for (Map.Entry<Integer, List<ExcelBean>> entry : map.entrySet()) {
            XSSFRow row = sheet.createRow(entry.getKey());
            List<ExcelBean> excels = entry.getValue();
            for (int x = 0; x < excels.size(); x++) {
                //合并单元格
                if(excels.get(x).getCols()>1){
                    if(x==0){
                        endIndex+=excels.get(x).getCols()-1;
                        CellRangeAddress range=new CellRangeAddress(0,0,startIndex,endIndex);
                        sheet.addMergedRegion(range);
                        startIndex+=excels.get(x).getCols();
                    }else{
                        endIndex+=excels.get(x).getCols();
                        CellRangeAddress range=new CellRangeAddress(0,0,startIndex,endIndex);
                        sheet.addMergedRegion(range);
                        startIndex+=excels.get(x).getCols();
                    }
                    XSSFCell cell = row.createCell(startIndex-excels.get(x).getCols());
                    cell.setCellValue(excels.get(x).getHeadTextName());// 设置内容
                    if (excels.get(x).getCellStyle() != null) {
                        cell.setCellStyle(excels.get(x).getCellStyle());// 设置格式
                    }
                    cell.setCellStyle(fontStyle);
                }else{
                    XSSFCell cell = row.createCell(x);
                    cell.setCellValue(excels.get(x).getHeadTextName());// 设置内容
                    if (excels.get(x).getCellStyle() != null) {
                        cell.setCellStyle(excels.get(x).getCellStyle());// 设置格式
                    }
                    cell.setCellStyle(fontStyle);
                }
            }
        }
    }
    public static void createTableRows(XSSFSheet sheet, Map<Integer, List<ExcelBean>> map, List objs, Class clazz)
            throws IllegalArgumentException, IllegalAccessException, InvocationTargetException, IntrospectionException,
            ClassNotFoundException, ParseException {
        int rowindex = map.size();
        int maxKey = 0;
        List<ExcelBean> ems = new ArrayList<>();
        for (Map.Entry<Integer, List<ExcelBean>> entry : map.entrySet()) {
            if (entry.getKey() > maxKey) {
                maxKey = entry.getKey();
            }
        }
        ems = map.get(maxKey);
        List<Integer> widths = new ArrayList<Integer>(ems.size());
        for (Object obj : objs) {
            XSSFRow row = sheet.createRow(rowindex);
            for (int i = 0; i < ems.size(); i++) {
                ExcelBean em = (ExcelBean) ems.get(i);
                // 获得get方法
                PropertyDescriptor pd = new PropertyDescriptor(em.getPropertyName(), clazz);
                Method getMethod = pd.getReadMethod();
                Object rtn = getMethod.invoke(obj);
                String value = "";
                // 如果是日期类型进行转换
                if (rtn != null) {
                    if (rtn instanceof Date) {
                        value = DateUtils.formatDate((Date)rtn,"yyyy-MM-dd");
                    } else if(rtn instanceof BigDecimal){
                        NumberFormat nf = new DecimalFormat("#,##0.00");
                        value=nf.format((BigDecimal)rtn).toString();
                    } else if((rtn instanceof Integer) && (Integer.valueOf(rtn.toString())<0 )){
                        value="--";
                    }else {
                        value = rtn.toString();
                    }
                }
                XSSFCell cell = row.createCell(i);
                cell.setCellValue(value);
                cell.setCellType(XSSFCell.CELL_TYPE_STRING);
                cell.setCellStyle(fontStyle2);
                // 获得最大列宽
                int width = value.getBytes().length * 300;
                // 还未设置，设置当前
                if (widths.size() <= i) {
                    widths.add(width);
                    continue;
                }
                // 比原来大，更新数据
                if (width > widths.get(i)) {
                    widths.set(i, width);
                }
            }
            rowindex++;
        }
        // 设置列宽
        for (int index = 0; index < widths.size(); index++) {
            Integer width = widths.get(index);
            width = width < 2500 ? 2500 : width + 300;
            width = width > 10000 ? 10000 + 300 : width + 300;
            sheet.setColumnWidth(index, width);
        }
    }
}

4 导入接口:

@RequestMapping("/import")
public String impotr(HttpServletRequest request, Model model) throws Exception {
     int adminId = 1;
     //获取上传的文件
     MultipartHttpServletRequest multipart = (MultipartHttpServletRequest) request;
     MultipartFile file = multipart.getFile("upfile");
     String month = request.getParameter("month");
     InputStream in = file.getInputStream();
     //数据导入
     salaryService.importExcelInfo(in,file,month,adminId);
     in.close();
     return "redirect:/salary/index.html";
}

5 service，mapper

public void importExcelInfo(InputStream in, MultipartFile file, String salaryDate,Integer adminId) throws Exception{
    List<List<Object>> listob = ExcelUtil.getBankListByExcel(in,file.getOriginalFilename());
    List<Salarymanage> salaryList = new ArrayList<Salarymanage>();
    //遍历listob数据，把数据放到List中
    for (int i = 0; i < listob.size(); i++) {
        List<Object> ob = listob.get(i);
        Salarymanage salarymanage = new Salarymanage();
        //设置编号
        salarymanage.setSerial(SerialUtil.salarySerial());
        //通过遍历实现把每一列封装成一个model中，再把所有的model用List集合装载
        salarymanage.setAdminId(adminId);
        salarymanage.setCompany(String.valueOf(ob.get(1)));
        salarymanage.setNumber(String.valueOf(ob.get(2)));
        salarymanage.setName(String.valueOf(ob.get(3)));
        salarymanage.setSex(String.valueOf(ob.get(4)));
        salarymanage.setCardName(String.valueOf(ob.get(5)));
        salarymanage.setBankCard(String.valueOf(ob.get(6)));
        salarymanage.setBank(String.valueOf(ob.get(7)));
        //object类型转Double类型
        salarymanage.setMoney(Double.parseDouble(ob.get(8).toString()));
        salarymanage.setRemark(String.valueOf(ob.get(9)));
        salarymanage.setSalaryDate(salaryDate);
        salaryList.add(salarymanage);
    }
    //批量插入
    salarymanageDao.insertInfoBatch(salaryList);
}

<insert id="insertInfoBatch" parameterType="java.util.List">
    insert into salarymanage (admin_id, serial,company, number, name,sex, card_name, bank_card,
      bank, money, remark,salary_date)
    values
    <foreach collection="list" item="item" index="index" separator=",">
      (#{item.adminId}, #{item.serial}, #{item.company},#{item.number}, #{item.name},
      #{item.sex}, #{item.cardName},#{item.bankCard}, #{item.bank},
      #{item.money}, #{item.remark}, #{item.salaryDate})
    </foreach>
</insert>

6 导出控制层

@RequestMapping("/export")
public @ResponseBody void export(HttpServletRequest request, HttpServletResponse response) throwsClassNotFoundException, IntrospectionException, IllegalAccessException, ParseException, InvocationTargetException {
    String salaryDate = request.getParameter("salaryDate");
    if(salaryDate!=""){
        response.reset(); //清除buffer缓存
        Map<String,Object> map=new HashMap<String,Object>();
        // 指定下载的文件名，浏览器都会使用本地编码，即GBK，浏览器收到这个文件名后，用ISO-8859-1来解码，然后用GBK来显示
        // 所以我们用GBK解码，ISO-8859-1来编码，在浏览器那边会反过来执行。
        response.setHeader("Content-Disposition", "attachment;filename=" + new String(salaryDate.getBytes("GBK"),"ISO-8859-1"));
        response.setContentType("application/vnd.ms-excel;charset=UTF-8");
        response.setHeader("Pragma", "no-cache");
        response.setHeader("Cache-Control", "no-cache");
        response.setDateHeader("Expires", 0);
        XSSFWorkbook workbook=null;
        //导出Excel对象
        workbook = salaryService.exportExcelInfo(salaryDate);
        OutputStream output;
        try {
            output = response.getOutputStream();
            BufferedOutputStream bufferedOutPut = new BufferedOutputStream(output);
            bufferedOutPut.flush();
            workbook.write(bufferedOutPut);
            bufferedOutPut.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

7 service

public XSSFWorkbook exportExcelInfo(String salaryDate) throws InvocationTargetException, ClassNotFoundException, IntrospectionException, ParseException, IllegalAccessException {
    //根据条件查询数据，把数据装载到一个list中
    List<Salarymanage> list = salarymanageDao.selectApartInfo(salaryDate);
    for(int i=0;i<list.size();i++){
        //查询财务名字
        int adminId = list.get(i).getAdminId();
        String adminName = salarymanageDao.selectAdminNameById(adminId);
        list.get(i).setAdminName(adminName);
        list.get(i).setId(i+1);
    }
    List<ExcelBean> excel=new ArrayList<>();
    Map<Integer,List<ExcelBean>> map=new LinkedHashMap<>();
    XSSFWorkbook xssfWorkbook=null;
    //设置标题栏
    excel.add(new ExcelBean("序号","id",0));
    excel.add(new ExcelBean("厂名","company",0));
    excel.add(new ExcelBean("工号","number",0));
    excel.add(new ExcelBean("姓名","name",0));
    excel.add(new ExcelBean("性别","sex",0));
    excel.add(new ExcelBean("开户名","cardName",0));
    excel.add(new ExcelBean("银行卡号","bankCard",0));
    excel.add(new ExcelBean("开户行","bank",0));
    excel.add(new ExcelBean("金额","money",0));
    excel.add(new ExcelBean("备注","remark",0));
    map.put(0, excel);
    String sheetName = salaryDate + "月份收入";
    //调用ExcelUtil的方法
    xssfWorkbook = ExcelUtil.createExcelFile(Salarymanage.class, list, map, sheetName);
    return xssfWorkbook;
}