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：
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<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：
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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：
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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
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原文链接：https://blog.csdn.net/hz_940611/article/details/80590488
