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"));