Excel文件下载工具类

import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;


public class DownLoadUtil {
    /*
    @Parm filePath 文件在resource下的路径
    @Parm outputFileName 输出文件名
     */

    public static void downloadExcel(HttpServletRequest request,
                                HttpServletResponse response,
                                String filePath,
                                String outputFileName){
        InputStream inputStream = null;
        ServletOutputStream servletOutputStream = null;
        ResourceLoader resourceLoader = new DefaultResourceLoader();
        Resource resource = resourceLoader.getResource("classpath:"+filePath);
        response.setContentType("application/vnd.ms-excel;charset=utf-8");
        try {
            String encodeName = new String((outputFileName).getBytes(),"iso-8859-1");
            response.setHeader("Content-Disposition", "attachment;filename="+encodeName);
            inputStream = resource.getInputStream();
            servletOutputStream = response.getOutputStream();
            IOUtils.copy(inputStream, servletOutputStream);
            response.flushBuffer();
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            try {
                if(inputStream != null){
                    inputStream.close();
                    inputStream = null;
                }
                if(servletOutputStream != null){
                    servletOutputStream.close();
                    servletOutputStream = null;
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }


}