java文件下载 - 走看看

这个SpringMVC没什么关系吧，我在jsp中做过一个图片的下载，你可能要修改下代码

response.setContentType("application/x-download");
//application.getRealPath("/main/mvplayer/CapSetup.msi");获取的物理路径
String filedownload = request.getRealPath("/")+"/organization/img/"+"组织架构图.png";
String filedisplay = "组织架构图.png";
   filedisplay = URLEncoder.encode(filedisplay,"UTF-8");
   response.addHeader("Content-Disposition","attachment;filename=" + filedisplay);

  java.io.OutputStream outp = null;
  java.io.FileInputStream in = null;
  try
  {
  outp = response.getOutputStream();
  in = new java.io.FileInputStream(filedownload);

  byte[] b = new byte[1024];
  int i = 0;

  while((i = in.read(b)) > 0)
  {
outp.write(b, 0, i);
  }
outp.flush();
//要加以下两句话，否则会报错
//java.lang.IllegalStateException: getOutputStream() has already been called for this respons
out.clear();
out = pageContext.pushBody();
}
  catch(Exception e)
  {
  System.out.println("Error!");
  e.printStackTrace();
  }
  finally
  {
  if(in != null)
  {
  in.close();
  in = null;
  }

  if(in != null)
  {
  in.close();
  in = null;
  }
  }

这些在网上找也很好找的

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: 关注; kuailexiaobuding; kuailexiaobuding; 本版等级：

#3 得分：20 回复于： 2013-09-23 09:57:16

//下载方法
private void downloadFile(File file){
String fileName = file.getName();
try {
fileName = URLEncoder.encode(fileName, "UTF-8");
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
contextPvd.getResponse().setContentType("application/zip");
contextPvd.getResponse().addHeader("Content-Disposition", "attachment;filename=" + fileName);
OutputStream outp = null;
FileInputStream in = null;
try {
outp = contextPvd.getResponse().getOutputStream();
in = new FileInputStream(file);
byte[] b = new byte[1024];
int i = 0;

while ((i = in.read(b)) > 0) {
outp.write(b, 0, i);
}
outp.flush();
} catch (Exception e) {
//log.error("", e);
} finally {
if (in != null) {
try {
in.close();
in = null;
} catch (IOException e) {
e.printStackTrace();
}
}
if (outp != null) {
try {
outp.close();
outp = null;
} catch (IOException e) {
e.printStackTrace();
}
}
}
}