excel导出

//前端不要ajax，post请求
@RequestMapping(value = \"/export\")
@ResponseBody
public void export(HttpServletResponse response) {
    //获取数据
    List<UserEntity> list = userRepository.findAll();
    //excel标题
    String[]   = {\"编码\", \"昵称\", \"名\", \"姓\", \"密码\"};
    //excel文件名
    String fileName = \"users\" + \".xls\";
    //sheet名
    String sheetName = \"users\";
    String[][] content;
    content = new String[list.size() + 1][5];
    for (int i = 0; i < list.size(); i++) {
        UserEntity obj = list.get(i);
        // content[i][0] = String.valueOf(obj.getId());
        content[i][0] = String.valueOf(obj.getId());
        content[i][1] = obj.getNickname();
        content[i][2] = obj.getFirstName();
        content[i][3] = obj.getLastName();
        content[i][4] = obj.getPassword();
    }
    //创建HSSFWorkbook
    HSSFWorkbook wb = ExcelUtil.getHSSFWorkbook(sheetName,  , content, null);
    //响应到客户端
    try {
        this.setResponseHeader(response, fileName);
        OutputStream os = response.getOutputStream();
        wb.write(os);
        os.flush();
        os.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}
//发送响应流方法
public void setResponseHeader(HttpServletResponse response, String fileName) {
    try {
        try {
            fileName = new String(fileName.getBytes(), \"ISO8859-1\");
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        response.setContentType(\"application/octet-stream;charset=ISO8859-1\");
        response.setHeader(\"Content-Disposition\", \"attachment;filename=\" + fileName);
        response.addHeader(\"Pargam\", \"no-cache\");
        response.addHeader(\"Cache-Control\", \"no-cache\");
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

public class ExcelUtil {

    /**
     * 导出Excel
     * @param sheetName sheet名称
     * @param   标题
     * @param values 内容
     * @param wb HSSFWorkbook对象
     * @return
     */
    public static HSSFWorkbook getHSSFWorkbook(String sheetName,String [] ,String [][]values, HSSFWorkbook wb){
        // 第一步，创建一个HSSFWorkbook，对应一个Excel文件
        if(wb == null){
            wb = new HSSFWorkbook();
        }
        // 第二步，在workbook中添加一个sheet,对应Excel文件中的sheet
        HSSFSheet sheet = wb.createSheet(sheetName);
        // 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制
        HSSFRow row = sheet.createRow(0);
        // 第四步，创建单元格，并设置值表头 设置表头居中
        HSSFCellStyle style = wb.createCellStyle();
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式
        //声明列对象
        HSSFCell cell = null;
        //创建标题
        for(int i=0;i< .length;i++){
            cell = row.createCell(i);
            cell.setCellValue( [i]);
            cell.setCellStyle(style);
        }
        sheet.setColumnWidth(0,4000);
        sheet.setColumnWidth(1,2200);
        //创建内容
        for(int i=0;i<values.length;i++){
            row = sheet.createRow(i + 1);
            for(int j=0;j<values[i].length;j++){
                //将内容按顺序赋给对应的列对象
                row.createCell(j).setCellValue(values[i][j]);
            }
        }
        return wb;
    }
}