httpclient 4.3新变化

创建httpclient不同

CloseableHttpClient client=HttpClients.createDefault();（3.x） HttpClient client=new DefaultHttpClient(); （4.3）

设置超时

3.x

HttpClient client = new HttpClient(); client.setConnectionTimeout(30000);   client.setTimeout(30000);

或

client.getHttpConnectionManager().getParams().setConnectionTimeout(5000);

  3.x--->4.2

client.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,2000);//连接时间

client.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,2000);//数据传输时间

4.3

HttpGet get=new HttpGet();//(post设置类似)

RequestConfig config= RequestConfig.custom().setSocketTimeout(2000).setConnectTimeout(2000).setProxy(new HttpHost("127.0.0.1", 8888)).build();//设置请求和传输超时时间已经代理

get.setConfig(requestConfig);

client.execute(get);//执行请求

更一般的用法如下：

CloseableHttpClient httpClient = HttpClients.createDefault(); RequestConfig defaultRequestConfig = RequestConfig.custom() .setSocketTimeout(5000)//5秒根据实际情况更改 .setConnectTimeout(5000)//5秒根据实际情况更改 .setConnectionRequestTimeout(5000) .setStaleConnectionCheckEnabled(true)

.setCookieSpec(CookieSpecs.BROWSER_COMPATIBILITY)//设置cookie策略为浏览器模式 以免出现cookie2

.build();

//把上面defaultRequestConfig用做客户端默认的config

CloseableHttpClient httpclient = HttpClients.custom().setDefaultRequestConfig(defaultRequestConfig).build();

Request可以覆盖客户端级别的请求配置 HttpGet httpget = new HttpGet("http://www.apache.org/"); RequestConfig requestConfig = RequestConfig.copy(defaultRequestConfig)     .setProxy(new HttpHost("myotherproxy", 8080))     .build(); httpget.setConfig(requestConfig);

cookie设置

CookieStore cs=new BasicCookieStore(); BasicClientCookie cookie=new BasicClientCookie("cookieName", "cookieValue"); cookie.setDomain(".domain"); cookie.setPath("/"); cs.addCookie(cookie);

只有设置了域名和路径，自定义添加的cookie才有效。