下载代码参考

来源：互联网发布：申请域名多少钱编辑：程序博客网时间：2024/04/30 01:29

jsp页面传值：

function getBasePath(){ var obj=window.location; var contextPath=obj.pathname.split("/")[1]; var basePath=obj.protocol+"//"+obj.host+"/"+contextPath; return basePath; }var methodPath = getBasePath();document.getElementById("exportImg").href = methodPath+ "/download/downLoadFile.do?filePath=/resources/images/linepic.png&filename=linepic.png";

controller层代码：

package com.sunyway.govhr.utils;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controller@RequestMapping("/download")public class DownLoad {@RequestMapping(value="/downLoadFile.do")public void downLoadFile(HttpServletResponse response,HttpServletRequest request,String filePath,String filename) throws IOException {BufferedOutputStream bos = null;BufferedInputStream bis = null;String path = request.getSession().getServletContext().getRealPath("/")+filePath;//request.getSession().getServletContext() 获取的是Servlet容器对象，相当于tomcat容器了。getRealPath("/") 获取实际路径，“/”指代项目根目录，所以代码返回的是项目在容器中的实际发布运行的根路径如：I:\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp1\wtpwebapps\UMPWeb_20131230\File downfile = new File(path);try {response.setContentType("application/x-msdownload");response.setHeader("Content-disposition", "attachment;filename="+filename); bis = new BufferedInputStream(new FileInputStream(downfile));bos = new BufferedOutputStream(response.getOutputStream());byte[] buff = new byte[1024];int bytesRead;while(-1 != (bytesRead = bis.read(buff,0,buff.length))) {bos.write(buff,0,bytesRead);}} catch (Exception e) {} finally {if (bis != null) {bis.close();}if (bos != null) {bos.close();}}}}

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