Spring 实现文件上传与下载

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文件上传

upload.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%> <%@ include file="/taglibs.jsp"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body>   <h2 >   文件上传  </h2>     <div class="pageContent">  <form method="post" action="/dhcss/ssp/upload/upload.do" enctype="multipart/form-data">                  <div class="pageFormContent nowrap" layoutH="97">      <input type="hidden" name="name" />                 <input type="file" name="file"/><div class="divider"></div><p>自定义扩展请参照：dwz.validate.method.js</p><p>错误提示信息国际化请参照：dwz.regional.zh.js</p></div><div class="formBar"><ul><li><div class="buttonActive"><div class="buttonContent"><button type="submit">提交</button></div></div></li><li><div class="button"><div class="buttonContent"><button type="button" class="close">取消</button></div></div></li></ul></div>    </form>  </div></body></html>

java 上传代码;

package com.dhcc.dhcss.ssp.sm;import java.io.File;import java.util.Date;import javax.servlet.ServletContext;import javax.servlet.http.HttpServletRequest;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.context.ServletContextAware;import org.springframework.web.multipart.commons.CommonsMultipartFile;@Controller //声明该类为控制器类@RequestMapping("/ssp/upload")public class FileUploadController implements ServletContextAware{ //实现ServletContextAware接口，获取本地路径 private ServletContext servletContext; public void setServletContext(ServletContext servletContext) { //实现接口中的setServletContext方法  this.servletContext = servletContext; } @RequestMapping(value = "/upload", method = RequestMethod.POST) //将文件上传请求映射到该方法 public String handleFormUpload(@RequestParam("name") String name, //设置请求参数的名称和类型   @RequestParam("file") CommonsMultipartFile mFile,HttpServletRequest req) { //请求参数一定要与form中的参数名对应  if (!mFile.isEmpty()) {   //String path = this.servletContext.getRealPath("/");  //获取本地存储路径//  String path="/home/chen/";  String pc=req.getServletContext().getRealPath("/WEB-INF/conf.properties");  Configuration rc = new Configuration(pc);//相对路径  String path=rc.getValue("path");    System.out.println(path);       //File file = new File(path + new Date().getTime() + ".jpg"); //新建一个文件   File file = new File(path + new Date().getTime()); //新建一个文件   System.out.println(file.getAbsolutePath());   try {    mFile.getFileItem().write(file); //将上传的文件写入新建的文件中   } catch (Exception e) {    e.printStackTrace();   }      return "ssp/sm/uploadSuccess"; //返回成功视图  }else {   return "ssp/sm/uploadFail"; //返回失败视图  } }public void setServletContext1(ServletContext arg0) {// TODO Auto-generated method stub}}

uploadSuccess.jsp:<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body><h3 align='center'><font color='red'>上传成功，请去主文件夹下查看～～</font></h3><a href="http://localhost:8080/dhcss">返回首页</a></body></html>



uploadFail.jsp: <%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body><h3 align='center'><font color='red'>上传失败～～</font></h3><a href="http://localhost:8080/dhcss">返回首页</a></body></html>


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download.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><script type="text/javascript" src="../../js/jquery-1.7.1.js"></script><title>upload</title></head><body><h2 >   文件下载  </h2>   <div>  <div class="pageFormContent nowrap" layoutH="97">请输入文件夹下要下载的文件名（限英文名）<input id='fileName' type="text" name="fileName" /><div class="divider"></div><p>自定义扩展请参照：dwz.validate.method.js</p><p>错误提示信息国际化请参照：dwz.regional.zh.js</p></div><div class="formBar"><ul><li><div class="buttonActive"><div class="buttonContent"><a id="btn" href="/dhcss/download.do" target="blank"><button>下载</button></a></div></div></li><li><div class="button"><div class="buttonContent"><button type="button" class="close">取消</button></div></div></li></ul></div></div></body><script type="text/javascript">$(function(){      $('a').click(function(){          var link=this.href+'?'+'fileName='+$('#fileName').val();          window.open(link);          return false;      });  });  </script></html>

java 文件下载代码：

package com.dhcc.dhcss.ssp.sm;import java.io.File;  import java.io.FileInputStream;  import java.io.FileNotFoundException;  import java.io.IOException;  import java.io.InputStream;  import java.io.OutputStream;    import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;    import org.springframework.stereotype.Controller;  import org.springframework.web.bind.annotation.RequestMapping;  import org.springframework.web.bind.annotation.RequestParam;  @Controller  public class FileDownloadController {    //static final String dir = "/home/chen/";    @RequestMapping("download.do")      public void downloadFile(@RequestParam String fileName,HttpServletResponse response,HttpServletRequest req){          response.setCharacterEncoding("utf-8");          response.setContentType("multipart/form-data");            response.setHeader("Content-Disposition", "attachment;fileName="+fileName);          String pc=req.getServletContext().getRealPath("/WEB-INF/conf.properties");  Configuration rc = new Configuration(pc);//相对路径  String dir=rc.getValue("path");        try {              File file=new File(dir+fileName);              System.out.println(file.getAbsolutePath());              InputStream inputStream=new FileInputStream(file);              OutputStream os=response.getOutputStream();              byte[] b=new byte[1024];              int length;              while((length=inputStream.read(b))>0){                  os.write(b,0,length);              }              inputStream.close();          } catch (FileNotFoundException e) {              e.printStackTrace();          } catch (IOException e) {              e.printStackTrace();          }      }  }  



	
					
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