request.getinputstream()作用
时间: 2023-03-19 08:26:29 浏览: 130
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。
相关问题
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()
在Java Web开发中,request.getInputStream()方法用于获取HTTP请求中的请求体。它返回一个ServletInputStream对象,开发人员可以通过该对象读取请求体中的数据。一般情况下,请求体中的数据是以流的形式传输的,比如POST请求中的表单数据、JSON数据等。以下是一个示例代码:
```java
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
ServletInputStream inputStream = request.getInputStream();
byte[] buffer = new byte[1024];
int len;
while ((len = inputStream.read(buffer)) != -1) {
// 处理请求体数据
}
}
```
需要注意的是,使用request.getInputStream()方法获取请求体时,必须在获取参数之前调用,否则会导致获取参数失败。此外,一旦调用了该方法,就不能再使用request.getParameter()等方法获取参数了,因为这些方法会触发对请求体的读取,而请求体的数据只能被读取一次。
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