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) {

}

});