1. 文件下载
准备一个文件C:/Users/admin/Desktop/test.xlsx
/** * 定制分析下载模板文档 * @param response * @return */ @RequestMapping("/downLoadTemplateExcel") public Info downLoadTemplateExcel(HttpServletResponse response){ logger.info("/customAnalysisConfig/downLoadTemplateExcel"); Info infos=new Info(); // 创建输入输出流 BufferedInputStream bis = null; BufferedOutputStream bos = null; //String url = "C:/Users/admin/Desktop/test.xlsx"; String url =null; if(environment.equals("local")){//本地文件路径 url ="C:/Users/admin/Desktop/test.xlsx"; }else {//服务器文件路径 url = "/usr/java/test.xlsx"; } String downLoadPath = url; String fileName="template.xlsx";//生成的文件名 File file2 = new File(downLoadPath);//要下载的文件对象 if (!file2.exists()) {//如果目录不存在,创建目录 file2.mkdirs(); } long fileLength = file2.length();// 获取文件长度 try { //Content-Disposition: attachment; filename="filename.xls" //第一个参数是attachment（意味着消息体应该被下载到本地；大多数浏览器会呈现一个“保存为”的对话框， // 将filename的值预填为下载后的文件名，假如它存在的话） response.setHeader("Content-disposition", "attachment; filename=" + new String(fileName.getBytes("utf-8"), "ISO8859-1")); //Content-Type 实体头部用于指示资源的MIME类型 media type response.setHeader("Content-Type", "application/json"); //Content-Length, HTTP消息长度, 用十进制数字表示的八位字节的数目 response.setHeader("Content-Length", String.valueOf(fileLength)); // 创建输入输出流实例 bis = new BufferedInputStream(new FileInputStream(downLoadPath)); bos = new BufferedOutputStream(response.getOutputStream()); // 创建字节缓冲大小 byte[] buff = new byte[2048]; int bytesRead; while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) { bos.write(buff, 0, bytesRead); } }catch (Exception e){ e.printStackTrace(); }finally { if (bis != null) try { bis.close();// 关闭输入流 } catch (IOException e) { e.printStackTrace(); } if (bos != null) try { bos.close();// 关闭输出流 } catch (IOException e) { e.printStackTrace(); } } infos.setCode("1"); infos.setMsg("成功"); return infos ; }
2. 单文件上传
准备一个upload.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form action="http://localhost:4000/pdClientManagerSystem/customAnalysisConfig/upload" method="post" enctype="multipart/form-data"> <input type="file" name="file" value="Select your file: "> <input type="submit" value="Upload"> </form> </body> </html>
注意这里的 name="file"
//单文件上传的功能 @RequestMapping(value = "/upload") public String upload(MultipartFile file) { try { if (file.isEmpty()) { return "file is empty"; } String fileName = file.getOriginalFilename();//获取文件名 String suffixName = fileName.substring(fileName.lastIndexOf("."));//切割文件名 log.info("上传的文件名为：" + fileName + " 后缀名为" + suffixName); // 设置文件存储路径(D盘),你可以存放在你想要指定的路径里面。 String filePath = "D:/upload"; //文件存放路径=filePath+/+ fileName String path = filePath + "/" + fileName; File dest = new File(path); // 检测是否存在目录 if (!dest.getParentFile().exists()) { dest.getParentFile().mkdirs();// 新建文件夹 } file.transferTo(dest);// 文件写入到上述的存放路径path return "upload success"; } catch (Exception e) { e.printStackTrace(); } return "upload failure"; }
3. 多文件上传
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>批量文件上传</title> </head> <body> <form method="post" action="/batch" enctype="multipart/form-data">
<input type="file" name="file"><br> <input type="file" name="file"><br> <input type="file" name="file"><br> <br> <input type="submit" value="提交"> </form> </body> </html>
java代码
//多文件上传的功能 @RequestMapping("/batch") public String handleFileUpload(HttpServletRequest request) { List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("file"); MultipartFile file = null; BufferedOutputStream stream = null; for (int i = 0; i < files.size(); ++i) { file = files.get(i); String filePath = "D:/uploads"; if (!file.isEmpty()) { try { byte[] bytes = file.getBytes(); stream = new BufferedOutputStream(new FileOutputStream( new File(filePath + "/" + file.getOriginalFilename()))); stream.write(bytes);// 写入 stream.close(); } catch (Exception e) { stream = null; return "the " + i + " file upload failure"; } } else { return "the " + i + " file is empty"; } } return "upload Multifile success"; }
/**
* 定制分析下载模板文档
* @param response
* @return
*/
@RequestMapping("/downLoadTemplateExcel")
public Info downLoadTemplateExcel(HttpServletResponse response){
logger.info("/customAnalysisConfig/downLoadTemplateExcel");
Info infos=new Info();
// 创建输入输出流
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
//String url = "C:/Users/admin/Desktop/test.xlsx";
String url =null;
if(environment.equals("local")){//本地文件路径
url ="C:/Users/admin/Desktop/test.xlsx";
}else {//服务器文件路径
url = "/usr/java/test.xlsx";
}
String downLoadPath = url;
String fileName="template.xlsx";//生成的文件名
File file2 = new File(downLoadPath);//要下载的文件对象
if (!file2.exists()) {//如果目录不存在,创建目录
file2.mkdirs();
}
long fileLength = file2.length();// 获取文件长度
try {
//Content-Disposition: attachment; filename="filename.xls"
//第一个参数是attachment（意味着消息体应该被下载到本地；大多数浏览器会呈现一个“保存为”的对话框，
// 将filename的值预填为下载后的文件名，假如它存在的话）
response.setHeader("Content-disposition", "attachment; filename=" + new String(fileName.getBytes("utf-8"), "ISO8859-1"));
//Content-Type 实体头部用于指示资源的MIME类型 media type
response.setHeader("Content-Type", "application/json");
//Content-Length, HTTP消息长度, 用十进制数字表示的八位字节的数目
response.setHeader("Content-Length", String.valueOf(fileLength));
// 创建输入输出流实例
bis = new BufferedInputStream(new FileInputStream(downLoadPath));
bos = new BufferedOutputStream(response.getOutputStream());
// 创建字节缓冲大小
byte[] buff = new byte[2048];
int bytesRead;
while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff, 0, bytesRead);
}
}catch (Exception e){
e.printStackTrace();
}finally {
if (bis != null)
try {
bis.close();// 关闭输入流
} catch (IOException e) {
e.printStackTrace();
}
if (bos != null)
try {
bos.close();// 关闭输出流
} catch (IOException e) {
e.printStackTrace();
}
}
infos.setCode("1");
infos.setMsg("成功");
return infos ;
}