Java中实现简单的Excel导出

小蚂蚁

今天小编就为大家分享一篇关于Java中实现简单的Excel导出，小编觉得内容挺不错的，现在分享给大家，具有很好的参考价值，需要的朋友一起跟随小编来看看吧
简单介绍一下java中的excel文件导出功能（基于httpservletresponse实现下载）
首先，引入需要依赖的jar包：

<dependency>
 <groupid>org.apache.poi</groupid>
 <artifactid>poi</artifactid>
 <version>3.14</version>
</dependency>
<dependency>
 <groupid>org.apache.poi</groupid>
 <artifactid>poi-ooxml</artifactid>
 <version>3.14</version>
</dependency>

编写一个工具类：

package exceloutput;
import org.apache.commons.lang3.stringutils;
import org.apache.poi.ss.usermodel.cell;
import org.apache.poi.ss.usermodel.row;
import org.apache.poi.ss.usermodel.workbook;
import org.apache.poi.xssf.streaming.sxssfsheet;
import org.apache.poi.xssf.streaming.sxssfworkbook;
import javax.servlet.http.httpservletresponse;
import java.io.ioexception;
import java.io.unsupportedencodingexception;
import java.util.list;
import java.util.uuid;
/**
 * @author haozz
 * @date 2018/6/6 9:57
 * @description excel导出抽象工具类
 **/
public abstract class exportabstractutil {
  public void write(httpservletresponse response, workbook workbook){
  string filename = uuid.randomuuid().tostring()+".xls";
  pwrite(response,workbook,filename);
  }
  public void write(httpservletresponse response,workbook workbook,string filename){
  if(stringutils.isempty(filename)){
    filename = uuid.randomuuid().tostring()+".xls";
  }
  pwrite(response,workbook,filename);
  }
  public void write(httpservletresponse response, list<list<string>> lists,string filename){
  if(stringutils.isempty(filename)){
    filename = uuid.randomuuid().tostring()+".xls";
  }
  sxssfworkbook workbook = new sxssfworkbook(lists.size());
  sxssfsheet sheet = workbook.createsheet(filename.substring(0,filename.indexof(".xls")));
  integer rowindex = 0;
  row row = null;
  cell cell = null;
  for(list<string> rowdata: lists ){
    integer columnindex = 0;
    row = sheet.createrow(rowindex++);
    for(string columnval:rowdata){
    cell = row.createcell(columnindex++);
    cell.setcellvalue(columnval);
    }
  }
  pwrite(response,workbook,filename);
  }
  private void pwrite(httpservletresponse response,workbook workbook,string filename){
  response.setcharacterencoding("utf-8");
  response.setcontenttype("application/vnd.ms-excel;charset=utf-8");
  try {
    response.addheader("content-disposition", "attachment; filename="+new string(filename.getbytes("utf-8"),"iso8859-1"));
  } catch (unsupportedencodingexception e) {
    e.printstacktrace();
    filename= uuid.randomuuid().tostring()+".xls";
    response.addheader("content-disposition", "attachment; filename="+filename);
  }
  try {
    workbook.write(response.getoutputstream());
  } catch (ioexception e) {
    e.printstacktrace();
  }
  }
}

有了这个工具类就可以实现excel导出了，代码不难，这里就不多解释了。
在springboot项目中编写一个导出excel的controller，并继承上面的exportabstractutil，给出一个接口用作测试：

package com.csdn.myboot.controller;
import com.csdn.myboot.utils.exportabstractutil;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.responsebody;
import javax.servlet.http.httpservletresponse;
import java.util.arraylist;
import java.util.arrays;
import java.util.list;
/**
 * @author haozz
 * @date 2018/6/6 10:14
 * @description
 **/
@controller
@requestmapping(value = "/index")
public class helloctrl extends exportabstractutil{
  @requestmapping(value = "/testexceloutput")
  @responsebody
  public void testexceloutput(httpservletresponse response){
  //拼接数据start
  list<list<string>> lists = new arraylist<list<string>>();
  string rows[] = {"year","month","day"};
  list<string> rowstitle = arrays.aslist(rows);
  lists.add(rowstitle);
  for(int i = 0; i<=9;i++){
    string [] rowss = {"1","2","3"};
    list<string> rowsslist = arrays.aslist(rowss);
    lists.add(rowsslist);
  }
  //拼接数据end
  write(response,lists,"导出excel.xls");
  }
}

浏览器输入链接：

http://localhost:8099/index/testexceloutput

即可自动下载测试数据组成的excel：

总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，谢谢大家对CodeAE代码之家的支持。如果你想了解更多相关内容请查看下面相关链接
原文链接：https://blog.csdn.net/hz_940611/article/details/80590488