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

Question

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)如何将Cookie与Apache HTTP客户端一起使用,可以使用不同的cookie选项

(2)当HTTPResponse对象中的响应可用时,提取字符集,mimetype,响应头(作为KeyValuePair)和budy(作为byte []).

Answer 1

1)用于cookie的AS,请参阅exapmle:

httpcomponents-客户4.1.3 \例子\组织\阿帕奇\ HTTP \例子\客户\ ClientCustomContext.java

主要代码:

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)您可以从响应中获得所需的一切:

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

只需阅读httpcomponents-client-4.1.3-bin.zip的httpcomponents-client-4.1.3\examples\org\apache\http\examples\client中的示例,该文件从其网站下载.