HttpClient4基础1--通过匿名代理访问网页

HttpClient发布4.0了 而且底层完全重写了，据说无论是效率还是结构都有质的飞跃。
现在也要与时具进，研究研究。

package test.httpclient4.proxy; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import org.apache.http.HttpEntity; import org.apache.http.HttpHost; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.StatusLine; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.conn.params.ConnRoutePNames; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicStatusLine; import org.apache.http.util.EntityUtils; public class GetHttpByProxy { public static void main(String[] args) throws ClientProtocolException, IOException { //实例化一个HttpClient HttpClient httpClient = new DefaultHttpClient(); //设定目标站点 HttpHost httpHost = new HttpHost("www.shanhe114.com"); //设置代理对象 ip/代理名称,端口 HttpHost proxy = new HttpHost("192.168.1.28", 5608); //对HttpClient对象设置代理 httpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy); HttpGet httpGet = new HttpGet("/"); //这里也可以直接使用httpGet的绝对地址，当然如果不是具体地址不要忘记/结尾 //HttpGet httpGet = new HttpGet("http://www.shanhe114.com/"); //HttpResponse response = httpClient.execute(httpGet); HttpResponse response = httpClient.execute(httpHost, httpGet); if(HttpStatus.SC_OK==response.getStatusLine().getStatusCode()){ //请求成功 //取得请求内容 HttpEntity entity = response.getEntity(); //显示内容 if (entity != null) { // 显示结果 BufferedReader reader = new BufferedReader(new InputStreamReader(entity .getContent(), "UTF-8")); String line = null; StringBuffer strBuf = new StringBuffer((int) entity.getContentLength()); while ((line = reader.readLine()) != null) { strBuf.append(line); } strBuf.trimToSize(); System.out.println(strBuf.toString()); } if (entity != null) { entity.consumeContent(); } } } }

 

对于显示将结果转换成String以备后续使用，HttpClient已经为我们提供了一个简便方法
如下

System.out.println(EntityUtils.toString(entity,"utf-8"));