Question

Java中的httpclient4.5应该怎么使用

Answer 1

你要调用它里面的类，方法，你就把这个jar包引用到工程里。
这里有个例子，输出结果是hao123的源码：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

public class TTT
{

/**
* @param args
* @throws IOException
* @throws ClientProtocolException
*/
public static void main(String[] args) throws ClientProtocolException, IOException
{
// 创建HttpClient实例
HttpClient httpclient = new DefaultHttpClient();
// 创建Get方法实例
HttpGet httpgets = new HttpGet(https://www.hao123.com/");
HttpResponse response = httpclient.execute(httpgets);
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instreams = entity.getContent();
String str = convertStreamToString(instreams);
System.out.println("Do something");
System.out.println(str);
// Do not need the rest
httpgets.abort();
}
}

public static String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();

String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}

}