使用Java从AWS Lambda中的/tmp目录写入文件，然后从中读取文件 [英] Write and then read files from /tmp directory in aws lambda using java

问题描述

我编写了AWS Lambda代码，需要在其中将图像存储在aws lambda的/tmp位置.下面是我的代码:

I have written AWS Lambda code where I need to store an image in /tmp location of aws lambda. Below is my code:

String fileLocation = "loc1/loc2/";
String imageNameWithoutExt = "image1";
//creating directories first below storing the image
boolean status = new File("/tmp/"+fileLocation).mkdirs();
if(status == true){
File targetFile = File.createTempFile(imageNameWithoutExt,".jpg",new File("/tmp/"+fileLocation));
    FileOutputStream outStream = new FileOutputStream(targetFile);
    outStream.write(buffer);
    outStream.close();
}else{
    System.out.println("unable to create directory inside /tmp/");
}

作为响应，它正在打印else语句:

And in response, it is printing the else statement:

unable to create directory inside /tmp/

我需要进行哪些修改才能从/tmp位置写入和读取文件.任何帮助将不胜感激.

What modification I need to make to write and read the files from /tmp location. Any help would be appreciated.

推荐答案

在此代码行中，您未设置文件名:

In this line of code, you are not setting the filename:

//write file in /tmp folder of aws Lambda
File targetFile = new File("/tmp/");

我认为您可能没有显示所有代码，因为我看不到错误消息中的字符串image1.jpg的来源，但是该文件名需要添加到您要传递的参数中File构造函数.

I think maybe you aren't showing all your code, because I don't see where the String image1.jpg in the error message would be coming from, but that filename needs to be added to the parameter you are passing the File constructor.

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