文件没有使用JERSEY下载

问题描述

我在我的项目中使用了Jersey API。我陷入一个需要下载文件的情况，但不是。我的代码如下

  @GET 
 @Produces（application / download）
 public Response downloadFile（）{
 String data = getDatas（）; 
 ResponseBuilder response = Response.ok（data）; 
 response.header（Content-Disposition，attachment; filename = UserData.txt）; 
 response.header（charset，UTF-8）; 
 return Response.build（）; 
} 
  

我添加了所有的包，路径也很好。没有错误。

当我调用此API时，数据进入响应。我想要这个数据在一个文件和可下载的格式。

我也尝试过 @Produces（MediaType.APPLICATION_OCTET_STREAM）。

如果错误，请更正我

解决方案

我认为你没有发送你建立的回复。

首先你使用ResponseBuilder来构建resposne

  ResponseBuilder response = Response.ok（data）; 
 response.header（Content-Disposition，attachment; filename = UserData.txt）; 
 response.header（charset，UTF-8）; 
  

然后你返回静态的 Response.build（）（注意资本 R ）对象，这是空的

你应该返回 response.build（）

还应该生成 octet-stream 您的方法注释

  @Produces（MediaType.APPLICATION_OCTET_STREAM）
  

而不是

  @Produces（application / download）
  

参考这个问题：

I am using jersey API in my project. I stuck in a case that file needs to be downloaded but it's not. My code is as follow

@GET
@Produces("application/download")
public Response downloadFile(){
    String data = getDatas();
    ResponseBuilder response = Response.ok(data);
    response.header("Content-Disposition","attachment;filename=UserData.txt");
    response.header("charset", "UTF-8");
    return Response.build();
}

I have added all the packages, paths are also fine. No Error came.

When I call this API, data comes in the response. I want this data to be in a file and in a downloadable format.

I also tried @Produces(MediaType.APPLICATION_OCTET_STREAM).

Please correct me if am doing wrong

解决方案

I think you are not sending the response you have build.

first you're using a ResponseBuilder to build the resposne

ResponseBuilder response = Response.ok(data);
response.header("Content-Disposition","attachment;filename=UserData.txt");
response.header("charset", "UTF-8");

then you are returning the static Response.build() (notice the capital R) object, which is empty

you should return response.build()

also, you should produce octet-stream in your method annotions

@Produces(MediaType.APPLICATION_OCTET_STREAM)

and not

@Produces("application/download")

refer to this question: what's the correct way to send a file from REST web service to client?

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