request.getinputstream()作用

request.getinputstream()的作用是获取HTTP请求的输入流，即获取客户端发送的数据。通过该方法可以读取客户端发送的数据，例如表单数据、文件等。在服务器端接收到请求后，可以通过该方法获取请求的输入流，然后对输入流进行处理，从而获取客户端发送的数据。

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request.getinputstream

The `getInputStream()` method is a method available in the `HttpServletRequest` class in Java. It returns an input stream that contains the body of the request made to the server.

When a client sends a request to the server, the request contains a body that is sent along with the request. This body can contain data in various formats like JSON, XML, or plain text. The `getInputStream()` method allows the server-side code to read this body and process it.

Here's an example of how to use the `getInputStream()` method:

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    InputStream inputStream = request.getInputStream();
    // Read the input stream and process the request body
}

In this example, we're using the `doPost()` method to handle a POST request. The `request` object is passed as a parameter to this method. We're calling the `getInputStream()` method on this object to get the input stream that contains the body of the request. We can then read this input stream and process the request body as needed.

request.getInputStream()

`request.getInputStream()` 是一个 Java Servlet API 中的方法，用于获取客户端发送到服务器的请求体。它返回一个 `ServletInputStream` 对象，可以用于读取请求体中的数据。

通常，`request.getInputStream()` 用于处理 POST 请求中的请求体数据，例如提交表单数据、上传文件等等。在处理 GET 请求时，可以使用 `request.getParameter()` 方法获取 URL 参数。