java实现前后端交互导出excel

第一步、前端获取参数并且通过form表单或者URL方式访问后台

//定义params对象接收键值对参数

var params = {
    isChecked: 1,
    startTime: "2017-03-05",
    endTime: "2017-03-08",
    status: 1,
    arbType: 2423,
    claimsStatus: 3412,
    arbDutyId: 542,
    siteId: 54,
    provinceId: 1342
};

//把param对象拼接成字符串

var encodeParam = function(json) {
    var tmps = [];
    for ( var key in json) {
        tmps.push(key + '=' + json[key]);
    }
    return tmps.join('&');
}

//定义url

var url=basePath+"submenuController/export?"+encodeParam(query);
//判断是否有id为_exportForm的form表单，如果没有则创建一个隐藏的form，把url放入，然后submit
var exportForm = document.getElementById("_exportForm");
if (!exportForm){
    exportForm = document.createElement("form");
    exportForm.setAttribute('id',"_exportForm");
    exportForm.setAttribute("action", url);
    exportForm.setAttribute("method", "post");
}
document.body.appendChild(exportForm);
exportForm.submit();

第二步、后台接收参数，拼接Excel Title，查询出list，调用Excel生成工具类

@RequestMapping(value ="export",method = RequestMethod.POST)
@ResponseBody
public void exportSiteDeclareList(HttpServletResponse response,SubmenuQuery query){
    String[] headArray = {"运单号","理赔情况","申报网点名称","省区","申报类型","责任类型",
            "仲裁登记时间","寄件日期","仲裁审核日期","分单人","分单时间"};
    List<SubmenuVO> list = this.submenuFacade.findSubmenuPageQuery(query).getRows();
    List<Object[]> contentList = new ArrayList<>();
    if(list.size()>0) {
        for (SubmenuVO entity : list) {
            Object[] o = {
                    entity.getEwbNo(),//"运单号
                    entity.getClaimsStatus(),//理赔情况
                    entity.getDeclareSiteName(),//申报网点名称
                    entity.getProvinceAreaName(),//省区
                    entity.getArbTypeName(),//申报类型
                    entity.getArbDutyName(),//责任类型
                    entity.getArbRegisterTime(),//仲裁登记时间
                    entity.getEwbDate(),//寄件日期
                    entity.getArbCheckTime(),//仲裁审核日期
                    entity.getUserName(),//分单人
                    entity.getCreateTime()//分单时间
            };

            contentList.add(o);
        }
    }else{
        return;
    }
    try {
         ExeclUtil.ExportExcel(response, headArray, contentList, "SubmenuList.xls");
    } catch (Exception e) {
        LOGGER.error("网点理赔申报导出报错"+e);
    }
}

第三步、Excel工具类

package util;

import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.servlet.http.HttpServletResponse;



/**
 * Excel导出工具类
 */
public class ExeclUtil {

   /**
    * @param title
    * @param headers
    * @param dataset
    */
   public static InputStream exportExcel(String title, String[] headers, List<Object[]> dataset) {
      InputStream is;
      ByteArrayOutputStream os = new ByteArrayOutputStream();
      // 声明一个工作薄
      HSSFWorkbook workbook = new HSSFWorkbook();
      // 生成一个表格
      HSSFSheet sheet = workbook.createSheet(title);
      // 设置表格默认列宽度为15个字节
      sheet.setDefaultColumnWidth((short) 15);
      // 生成一个样式
      HSSFCellStyle style = workbook.createCellStyle();
      // 设置这些样式
      style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
      style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
      style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
      style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
      style.setBorderRight(HSSFCellStyle.BORDER_THIN);
      style.setBorderTop(HSSFCellStyle.BORDER_THIN);
      style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
      // 生成一个字体
      HSSFFont font = workbook.createFont();
      font.setColor(HSSFColor.VIOLET.index);
      font.setFontHeightInPoints((short) 12);
      font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
      // 把字体应用到当前的样式
      style.setFont(font);
      // 生成并设置另一个样式
      HSSFCellStyle style2 = workbook.createCellStyle();
      style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
      style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
      style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
      style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
      style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
      style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
      style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
      style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
      // 生成另一个字体
      HSSFFont font2 = workbook.createFont();
      font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
      // 把字体应用到当前的样式
      style2.setFont(font2);
      // 声明一个画图的顶级管理器
      HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
      // 定义注释的大小和位置,详见文档
      HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
            0, 0, 0, (short) 4, 2, (short) 6, 5));
      // 设置注释内容
      comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
      // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
      comment.setAuthor("leno");
      // 产生表格标题行
      HSSFRow row = sheet.createRow(0);
      for (short i = 0; i < headers.length; i++) {
         HSSFCell cell = row.createCell(i);
         cell.setCellStyle(style);
         HSSFRichTextString text = new HSSFRichTextString(headers[i]);
         cell.setCellValue(text);
      }
      // 遍历集合数据，产生数据行
      int index = 0;
      for (Object[] o : dataset) {
         index++;
         row = sheet.createRow(index);
         for (short i = 0; i < o.length; i++) {
            HSSFCell cell = row.createCell(i);
            cell.setCellStyle(style2);
            try {
               Object value = o[i];
               if(value== null){
                  value="";
               }
               // 判断值的类型后进行强制类型转换
               String textValue = null;
               if (value instanceof Boolean) {
                  boolean bValue = (Boolean) value;
                  textValue = "男";
                  if (!bValue) {
                     textValue = "女";
                  }
               } else if (value instanceof Date) {
                  Date date = (Date) value;
                  SimpleDateFormat sdf = new SimpleDateFormat(
                        "yyyy-MM-dd HH:mm:ss");
                  textValue = sdf.format(date);
               } else if (value instanceof byte[]) {
                  // 有图片时，设置行高为60px;
                  row.setHeightInPoints(60);
                  // 设置图片所在列宽度为80px,注意这里单位的一个换算
                  sheet.setColumnWidth(i, (short) (35.7 * 80));
                  // sheet.autoSizeColumn(i);
                  byte[] bsValue = (byte[]) value;
                  HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
                        1023, 255, (short) 7, index, (short) 7, index);
                  anchor.setAnchorType(2);
                  patriarch.createPicture(anchor, workbook.addPicture(
                        bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
               } else {
                  // 其它数据类型都当作字符串简单处理
                  textValue = value.toString();
               }
               // 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
               if (textValue != null) {
                  Pattern p = Pattern.compile("^//d+(//.//d+)?$");
                  Matcher matcher = p.matcher(textValue);
                  if (matcher.matches()) {
                     // 是数字当作double处理
                     cell.setCellValue(Double.parseDouble(textValue));
                  } else {
                     HSSFRichTextString richString = new HSSFRichTextString(
                           textValue);
                     HSSFFont font3 = workbook.createFont();
                     font3.setColor(HSSFColor.BLUE.index);
                     richString.applyFont(font3);
                     cell.setCellValue(richString);
                  }
               }
            } catch (Exception e) {
               e.printStackTrace();
            } finally {
               // 清理资源
            }
         }
      }
      try {
         workbook.write(os);
      } catch (IOException e) {
         e.printStackTrace();
      }
      is = new ByteArrayInputStream(os.toByteArray());
      return is;
   }

   public static void ExportExcel(HttpServletResponse response, String[] headArray,
                           List<Object[]> contentList, String fileName) throws Exception {
      // 读到流中
      InputStream inStream = exportExcel(fileName, headArray, contentList);
      // 设置输出的格式
      response.reset();
      response.setContentType("bin");
      response.addHeader("Content-Disposition", "attachment; filename=\""
            + fileName + "\"");
      // 循环取出流中的数据
      byte[] b = new byte[100];
      int len;
      try {
         while ((len = inStream.read(b)) > 0)
            response.getOutputStream().write(b, 0, len);
         inStream.close();
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}