HttpClient使用笔记

四步走：

1、先创建一个DefaultHttpClient的实例

HttpClient httpClient=new DefaultHttpClient();

2、发送GET请求:

先创建一个HttpGet对象,传入目标的网络地址,然后调用HttpClient的execute()方法即可:

HttpGet HttpGet=new HttpGet(“http://www.baidu.com”);

httpClient.execute(httpGet);

3、返回响应实体↓

HttpResponse response

4、获取消息实体

HttpEntity entity = response.getEntity();

初步使用代码

public class HttpCLientDemo
{

// HttpClient 代表Http客户端
// HttpEntity 消息载体,发送或者接收消息的载体,可以通过客户端请求或者服务器响应获取实例
// HttpConnection 代表http连接
/**
* @param args
*/
public static void main(String[] args)
{
// 创建默认的客户端实例
HttpClient httpCLient = new DefaultHttpClient();

// 创建get请求实例
HttpGet httpget = new HttpGet("http://www.baidu.com");

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

try
{

// 客户端执行get请求 返回响应实体
HttpResponse response = httpCLient.execute(httpget);

// 服务器响应状态行
System.out.println(response.getStatusLine());

Header[] heads = response.getAllHeaders();
// 打印所有响应头
for(Header h:heads){
System.out.println(h.getName()+":"+h.getValue());
}

// 获取响应消息实体
HttpEntity entity = response.getEntity();

System.out.println("------------------------------------");

if(entity != null){

//响应内容
System.out.println(EntityUtils.toString(entity));

System.out.println("----------------------------------------");
// 响应内容长度
System.out.println("响应内容长度："+entity.getContentLength());
}

} catch (ClientProtocolException e){
e.printStackTrace();
} catch (IOException e){
e.printStackTrace();
}finally{
httpCLient.getConnectionManager().shutdown();
}
}

}

　　

参考资料
http://blog.csdn.net/manymore13/article/details/8481230 http://itindex.net/detail/52566-httpclient