java文件上传下载接口_java 文件上传下载
翻新十年前的老项目，文件上传改为调用接口方式，记录一下子~~~
java后台代码：
//取配置文件中的上传目录
@Value("${uploadPath}")
String path;
//文件上传接口
@RequestMapping(value = "upload")
@ResponseBody
public String getMobileAuthCode( HttpServletRequest request,String files ,String appId,String fileUUIDs,String myCallback)
throws Exception {
//文件支持多个 以逗号分隔
String[] file=files.split(",");
//文件生成的uuid ，以逗号分隔，防止文件重名
String[] fileUUID=fileUUIDs.split(",");
//本地文件
File localFile;
InputStream input = null;
OutputStream output = null;
for (int i = 0; i
localFile=new File(file[i]);
String fileName = localFile.getName();
//获取文件类型
String filetype=fileName.substring(fileName.indexOf("."),fileName.length());
try {
File var4 = new File(path+"\\" + appId);
//若目标地址不存在，则创建
if (!var4.exists() || var4.exists() && !var4.isDirectory()) {
var4.mkdirs();
}
//将本地文件 写入目标地址
input = new FileInputStream(localFile);
output = new FileOutputStream(new File(path + "\\" +appId+"\\"+ fileUUID[i]+filetype));
byte[] buf = new byte[1024];
int bytesRead;
while ((bytesRead = input.read(buf)) != -1) {
output.write(buf, 0, bytesRead);
}
}catch (Exception e){
System.out.println("文件上传失败");
e.printStackTrace();
}finally {
input.close();
output.close();
}
}
String result = "{'ret':'true'}";
result=myCallback+"("+result+")";
return result;
}
//文件下载
@RequestMapping("downLoad")
public ResponseEntity downloadFile(String fileUrl,String needFile) throws IOException {
//获取文件路径
HttpHeaders headers = new HttpHeaders();//http头信息
File file = new File(path+"\\"+fileUrl);//新建一个文件
String downloadFileName = new String(needFile.getBytes(), "iso-8859-1");
//设置编码
headers.setContentDispositionFormData("attachment", downloadFileName);
headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
return new ResponseEntity(FileUtils.readFileToByteArray(file), headers, HttpStatus.CREATED);
}
jsp 页面代码：
window.open("http://ip:port/file/downLoad?needFile="+filename+"&fileUrl="+fileurl);//下载
//上传
$.ajax({
url: "http://ip:port/file/upload",
type: 'post',
dataType:'jsonp',
jsonp: "callback",
data:{
"files":files,
"appId":contentForm.appId.value,
"fileUUIDs":fileUUIDs
},
success: function (data) {
}
});