HttpClient最新版本的应用：HttpClient4.0、HttpCore4.0的基础 。这个版本与以前的版本接口方法有一定的接口
现在Apache已经发布了：HttpCore 4.0-beta3、HttpClient 4.0-beta1。
到此处可以去下载这些源代码：http://hc.apache.org/downloads.cgi
另外，还需要apache-mime4j-0.5.jar包。
package test;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.params.CookiePolicy;
import org.apache.http.client.params.ClientPNames;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
public class Test2 {
public static void main(String[] args) throws Exception {
DefaultHttpClient httpclient = new DefaultHttpClient(); //实例化一个HttpClient
HttpResponse response = null;
HttpEntity entity = null;
httpclient.getParams().setParameter(
ClientPNames.COOKIE_POLICY, CookiePolicy.BROWSER_COMPATIBILITY); //设置cookie的兼容性
HttpPost httpost = new HttpPost("http://127.0.0.1:8080/pub/jsp/getInfo "); //引号中的参数是：servlet的地址
List <NameValuePair> nvps = new ArrayList <NameValuePair>();
nvps.add(new BasicNameValuePair("jqm", "fb1f7cbdaf2bf0a9cb5d43736492640e0c4c0cd0232da9de"));
// BasicNameValuePair("name", "value"), name是post方法里的属性, value是传入的参数值
nvps.add(new BasicNameValuePair("sqm", "1bb5b5b45915c8"));
httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8)); //将参数传入post方法中
response = httpclient.execute(httpost); //执行
entity = response.getEntity(); //返回服务器响应
try{
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine()); //服务器返回状态
Header[] headers = response.getAllHeaders(); //返回的HTTP头信息
for (int i=0; i<headers.length; i++) {
System.out.println(headers[i]);
}
System.out.println("----------------------------------------");
String responseString = null;
if (response.getEntity() != null) {
responseString = EntityUtils.toString(response.getEntity()); / /返回服务器响应的HTML代码
System.out.println(responseString); //打印出服务器响应的HTML代码
}
} finally {
if (entity != null)
entity.consumeContent(); // release connection gracefully
}
System.out.println("Login form get: " + response.getStatusLine());
if (entity != null) {
entity.consumeContent();