Java-apache http客户端使用示例，显示使用cookie和从HTTPResponse对象中提取响应 [英] Java- apache http client- usage examples showing use of cookies and extracting response from HTTPResponse object

问题描述

我在java web应用程序中使用apache http client（v4），我遇到以下情况，我需要简单的用法示例 -

（1）如何在Apache HTTP客户端使用Cookie，可以使用不同的cookie选项

（2）提取字符集，mimetype，响应头（作为KeyValuePair）和响应在HTTPResponse对象中可用的budy（如byte []）。

解决方案

1）用于cookie的AS，请参阅exapmle：

httpcomponents-client-4.1.3 \ examples.\\\\\\\\ >

主要代码：

  HttpClient httpclient = new DefaultHttpClient（）; 
 try {
 //创建cookie存储的本地实例
 CookieStore cookieStore = new BasicCookieStore（）; 
 
 //创建本地HTTP上下文
 HttpContext localContext = new BasicHttpContext（）; 
 //将自定义cookie存储绑定到本地上下文
 localContext.setAttribute（ClientContext.COOKIE_STORE，cookieStore）; 
 
 HttpGet httpget = new HttpGet（http://www.google.com/）; 
 
 System.out.println（执行请求+ httpget.getURI（））; 
 
 //将本地上下文作为参数传递
 HttpResponse response = httpclient.execute（httpget，localContext）; 
} finally {
 //当不再需要HttpClient实例时，
 //关闭连接管理器以确保
 //立即释放所有系统资源
 。httpclient.getConnectionManager（）关闭（）; 
} 
  

2）您可以从响应中获得所需的一切：

  HttpEntity entity = response.getEntity（）; 
 entity.getContent（）
  

请阅读以下示例：
httpcomponents- client-4.1.3\examples\org\apache\http\examples\client
httpcomponents-client-4.1.3-bin.zip，从网站。

I am working with apache http client (v4) in a java web app, and I am stuck in the following cases, for which I require simple usage examples--

(1) How to use Cookies with Apache HTTP client, different options available for usage of cookies

(2) Extracting charset, mimetype, response headers (as KeyValuePair) and budy (as byte[]) when the response is available in HTTPResponse object.

解决方案

1)AS for cookies,see that exapmle:

httpcomponents-client-4.1.3\examples\org\apache\http\examples\client\ClientCustomContext.java

main code:

HttpClient httpclient = new DefaultHttpClient();
        try {
            // Create a local instance of cookie store
            CookieStore cookieStore = new BasicCookieStore();

            // Create local HTTP context
            HttpContext localContext = new BasicHttpContext();
            // Bind custom cookie store to the local context
            localContext.setAttribute(ClientContext.COOKIE_STORE, cookieStore);

            HttpGet httpget = new HttpGet("http://www.google.com/");

            System.out.println("executing request " + httpget.getURI());

            // Pass local context as a parameter
            HttpResponse response = httpclient.execute(httpget, localContext);
        } finally {
            // When HttpClient instance is no longer needed,
            // shut down the connection manager to ensure
            // immediate deallocation of all system resources
            httpclient.getConnectionManager().shutdown();
        }

2)You can get all you need from response and:

HttpEntity entity = response.getEntity();
entity.getContent()

Just read the examples in: httpcomponents-client-4.1.3\examples\org\apache\http\examples\client of httpcomponents-client-4.1.3-bin.zip which is downloaded from its website.

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