Spring Boot Excel文件导出下载实现代码
SpringBootExcel文件导出
目标：
实现Excel文件的直接导出下载，后续开发不需要开发很多代码，直接继承已经写好的代码，增加一个Xml配置就可以直接导出。
实现：
1、抽象类BaseExcelView继承webmvc的 AbstractXlsxStreamingView抽象类，AbstractXlsxStreamingView是webmvc继承了最顶层View接口，是可以直接大量数据导出的不会造成内存泄漏问题，即SXSSFWorkbook解决了内存问题，导出只支持xlsx类型文件。
抽象类代码BaseExcelView：
publicabstractclassBaseExcelViewextendsAbstractXlsxStreamingView{
privatestaticfinalLoggerlogger=LoggerFactory.getLogger(BaseExcelView.class);
/**
*获取导出文件名
*
*@return
*/
abstractprotectedStringgetFileName();
/**
*获取表单名称
*
*@return
*/
abstractprotectedStringgetSheetName();
/**
*获取标题栏名称
*
*@return
*/
abstractprotectedString[]getTitles();
/**
*获取列宽
*
*@return
*/
abstractprotectedshort[]getColumnWidths();
/**
*构造内容单元格
*
*@paramsheet
*/
abstractprotectedvoidbuildContentCells(Sheetsheet);
@Override
protectedvoidbuildExcelDocument(
Mapmodel,Workbookworkbook,HttpServletRequestrequest,HttpServletResponseresponse)
throwsException{
//构造标题单元格SXSSFWorkbook
Sheetsheet=buildTitleCells(workbook);
//构造内容单元格
buildContentCells(sheet);
//设置响应头
setResponseHead(request,response);
}
/**
*设置响应头
*
*@paramresponse
*@throwsIOException
*/
protectedvoidsetResponseHead(HttpServletRequestrequest,
HttpServletResponseresponse)throwsIOException{
//文件名
StringfileName=getFileName();
StringuserAgent=request.getHeader("user-agent").toLowerCase();
logger.info("客户端请求头内容:");
logger.info("user-agent\t值:{}",userAgent);
if(userAgent!=null){
if(userAgent.contains("firefox")){
//firefox有默认的备用字符集是西欧字符集
fileName=newString(fileName.getBytes("UTF-8"),"ISO8859-1");
}elseif(userAgent.contains("webkit")&&(userAgent.contains("chrome")||userAgent.contains("safari"))){
//webkit核心的浏览器,主流的有chrome,safari,360
fileName=newString(fileName.getBytes("UTF-8"),"ISO8859-1");
}else{
//新老版本的IE都可直接用URL编码工具编码后输出正确的名称,无乱码
fileName=URLEncoder.encode(fileName,"UTF-8");
}
}
//响应头信息
response.setCharacterEncoding("UTF-8");
response.setContentType("application/ms-excel;charset=UTF-8");
response.setHeader("Content-disposition","attachment;filename="+fileName+".xlsx");
}
/**
*构造标题单元格
*
*@param
*@return
*/
protectedSheetbuildTitleCells(Workbookworkbook){
//表单名称
StringsheetName=getSheetName();
//标题名称
String[]titles=getTitles();
//列宽
short[]colWidths=getColumnWidths();
//创建表格
Sheetsheet=workbook.createSheet(sheetName);
//标题单元格样式
CellStyletitleStyle=getHeadStyle(workbook);
//默认内容单元格样式
CellStylecontentStyle=getBodyStyle(workbook);
//标题行
RowtitleRow=sheet.createRow(0);
//创建标题行单元格
for(inti=0;i
Excel导出实现1:可以直接继承BaseExcelView 实现定义的方法eg:
publicclassCheckExcelViewextendsBaseExcelView{
privateListvo;
publicCheckExcelView(Listvo){
this.vo=vo;
}
@Override
protectedStringgetFileName(){
Stringtime=DateUtils.getLocalFullDateTime14();
return"导出文件"+time;
}
@Override
protectedStringgetSheetName(){
return"报表";
}
@Override
protectedString[]getTitles(){
returnnewString[]{"申请时间"};
}
@Override
protectedshort[]getColumnWidths(){
returnnewshort[]{20};
}
@Override
protectedvoidbuildContentCells(Sheetsheet){
DecimalFormatdf=newDecimalFormat("0.00");
introwNum=1;
for(To:vO){
Rowcrow=sheet.createRow(rowNum++);
crow.createCell(0).setCellValue(o.getApplicationDate()));
}
}
}
导出实现2：XML配置导出
1、需要定义XML的配置export-config.xml
2、XMl解析配置
@Root
publicclassExport{
@ElementList(entry="table",inline=true)
privateListtable;
publicListgetTable(){
returntable;
}
publicvoidsetTable(Listtable){
this.table=table;
}
publicstaticclassTable{
@Attribute
privateStringid;
@Attribute
privateStringname;
@ElementList(entry="column")
privateListcolumns;
publicStringgetId(){
returnid;
}
publicvoidsetId(Stringid){
this.id=id;
}
publicStringgetName(){
returnname;
}
publicvoidsetName(Stringname){
this.name=name;
}
publicListgetColumns(){
returncolumns;
}
publicvoidsetColumns(Listcolumns){
this.columns=columns;
}
}
publicstaticclassColumn{
@Attribute
privateStringid;
@Attribute
privateStringname;
@Attribute
privateshortwidth;
@Attribute(required=false)
privateStringmapping;
publicStringgetId(){
returnid;
}
publicvoidsetId(Stringid){
this.id=id;
}
publicStringgetName(){
returnname;
}
publicvoidsetName(Stringname){
this.name=name;
}
publicStringgetMapping(){
returnmapping;
}
publicvoidsetMapping(Stringmapping){
this.mapping=mapping;
}
publicshortgetWidth(){
returnwidth;
}
publicvoidsetWidth(shortwidth){
this.width=width;
}
}
}
3、解析XMl方法配置
@Service
publicclassIExportService{
privateExporttables;
privateMaptableMap;
@SuppressWarnings("rawtypes")
@PostConstruct
publicvoidinit()throwsException{
InputStreaminputStream=this.getClass().getClassLoader().getResourceAsStream("export-config.xml");
Serializerserializer=newPersister();
tables=serializer.read(Export.class,inputStream);
tableMap=newHashMap<>();
for(Export.Tabletable:tables.getTable()){
tableMap.put(table.getId(),table);
}
}
publicExport.TablegetTable(Stringkey){
returntableMap.get(key);
}
}
4、导出基础 ExcelExportView代码实现
publicclassExcelExportViewextendsBaseExcelView{
privateString[]titles;
privateshort[]columnWidths;
List>results;
privateExport.Tabletable;
privateIExportServiceiExportService;
@Override
protectedStringgetFileName(){
returntable.getName();
}
@Override
protectedStringgetSheetName(){
returntable.getName();
}
@Override
protectedString[]getTitles(){
returnthis.titles;
}
@Override
protectedshort[]getColumnWidths(){
returnthis.columnWidths;
}
publicExcelExportView(){
this.iExportService=ApplicationContextProvider.getBean(IExportService.class);
}
@Override
protectedvoidbuildContentCells(Sheetsheet){
intdataIndex=1;
if(CollectionUtils.isEmpty(results)){
return;
}
for(Mapdata:results){
Rowrow=sheet.createRow(dataIndex++);
for(inti=0;i>results){
this.table=iExportService.getTable(key);
if(null==table){
return;
}
this.results=results;
this.titles=newString[table.getColumns().size()];
this.columnWidths=newshort[table.getColumns().size()];
for(inti=0;i
最后：导出Controller代码实现
@RequestMapping(path="/export",method=RequestMethod.GET,produces="application/octet-stream;charset=UTF-8")
public@ResponseBody
ModelAndViewexport(){
LongloginComId=loginContext.getCompany().getId();
Listlist=newArrayList<>();
ExcelExportViewexportView=newExcelExportView();
exportView.exportExcel("XMl中表的ID",BeanUtils.objectToMapList(list));
returnnewModelAndView(exportView);
}
总结
以上所述是小编给大家介绍的SpringBoot Excel文件导出下载实现代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持！
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