主要用的是org.apache.tools.zip.ZipOutputStream 这个zip流，这里以Execl为例子。
思路首先把zip流写入到http响应输出流中，再把excel的流写入zip流中（这里可以不用生成文件再打包，只需把execl模板读出写好数据输出到zip流中，并为每次的流设置文件名）
例如：在项目webapp下execl文件中 存在1.xls，2.xls，3.xls文件
1.Controller
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@RequestMapping(value = "/exportAll",method = RequestMethod.GET)
public void exportAll() throws IOException{
try {
HttpServletResponse response=this.getResponse();
response.setContentType("application/octet-stream");
String execlName = "报表";
response.addHeader("Content-Disposition", "attachment;filename="+new String(execlName.getBytes(),"iso-8859-1") +".zip");
OutputStream out = response.getOutputStream();
testService.exportAll(out);
} catch (Exception e) {
....
}
}
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2.Service
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import java.io.OutputStream;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;
import java.io.File;
import java.io.FileInputStream;
import javax.servlet.http.HttpServletRequest;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
public boolean exportAll(OutputStream out){
ZipOutputStream zipStream = null;
HSSFWorkbook wb = null;
try{
List<Test> datas = testService.getTestData();
zipStream = new ZipOutputStream(out);//这里是把zip流输出到httpresponse流中
for(int i=0;i<3;i++){
wb = POIUtil.getWorkbook(i);//获取0,1,2.xls文件
HSSFSheet sheet = wb.getSheetAt(0);
testService.setSheet(sheet,datas);//...处理文件内容操作
ZipEntry zipEntry = new ZipEntry(new String("文件名XXX".getBytes(),"utf-8")+".xls"); //自己命名，这里假设是1,2,3
zipStream.putNextEntry(zipEntry);
wb.write(zipStream);//这里就是循环每次把execl写入zip包中
zipStream.flush();
}
}catch (Exception e) {
throw new SysException(ERRORConstants.COMMON_SYSTEM_ERROR, e);
}finally {
try {
if(wb!=null){
wb.close();
}
if(zipStream!=null){
zipStream.close();
}
out.flush();
out.close();
} catch (IOException e) {
throw new SysException(ERRORConstants.COMMON_CLOSE_ERROR, e);
}
}
}
public static HSSFWorkbook getWorkbook(String bh){
try {
String line = File.separator;
ServletRequestAttributes aRequestAttributes=(ServletRequestAttributes)RequestContextHolder.getRequestAttributes();
HttpServletRequest request =aRequestAttributes==null?null:aRequestAttributes.getRequest();
String webpath=request.getServletContext().getRealPath("/");
File file = new File(webpath+line+"excel"+line+bh+".xls");
POIFSFileSystem poifsFileSystem = new POIFSFileSystem(new FileInputStream(file));
HSSFWorkbook wb = new HSSFWorkbook(poifsFileSystem);
return wb;
} catch (Exception e) {
throw new SysException(ERRORConstants.COMMON_SYSTEM_ERROR,e);
}
}
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最后的结果生成一个报表.zip，其中包含3个文件1.xls,2.xls,3.xls
总结
以上所述是小编给大家介绍的Java 批量文件压缩导出并下载到本地示例代码，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服务器之家网站的支持！
原文链接：https://www.cnblogs.com/zwdx/archive/2017/12/26/8118379.html