HttpClient 是 Apache Jakarta Common 下的子项目，可以用来提供高效的、最新的、功能丰富的支持 HTTP 协议的客户端编程工具包，并且它支持 HTTP 协议最新的版本和建议。下面小编准备了关于JAVA实现httpClient的实例，提供给大家参考!
package net.xfok.http;
import java.util.HashMap; import java.util.Iterator; import java.util.Map;
import org.apache.commons.httpclient.Header; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpStatus; import org.apache.commons.httpclient.NameValuePair; import org.apache.commons.httpclient.methods.PostMethod;
/**
*/
public class MyClient {
/**
*的到Http请求结果
* @param url请求地址
* @param parms请求参数
* @return
*/
public byte[] getBody(String url,Map parms){
byte[] body=null;
//构造HttpClient的实例
HttpClient httpClient = new HttpClient();
//创建GET方法的实例
PostMethod postMethod = new PostMethod(url);
//填入各个表单域的值
NameValuePair[] data = new NameValuePair[parms.keySet().size()]; Iterator it = parms.entrySet().iterator();
int i=0;
while (it.hasNext()) { Map.Entry entry = (Map.Entry) it.next(); Object key = entry.getKey(); Object value = entry.getValue(); data[i]=new NameValuePair(key.toString(),value.toString());
i++;
}
//将表单的值放入postMethod中
postMethod.setRequestBody(data);
try {
//执行postMethod
int statusCode = httpClient.executeMethod(postMethod); // HttpClient对于要求接受后继服务的请求，象POST和PUT等不能自动处理转发
// 301或者302
if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY || statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {
//从头中取出转向的地址
Header locationHeader = postMethod
.getResponseHeader(“location”);
String location = null;
if (locationHeader != null) { location = locationHeader.getValue(); System.out .println(“The page was redirected to:” + location);
} else {
System.err.println(“Location field value is null.”);
}
}
body = postMethod.getResponseBody();
} catch (Exception e) {
e.printStackTrace();
}
return body;
}
public static void main(String[] args) {
String url=“http://www.xfok.net”;
Map parms=new HashMap();
MyClient client=new MyClient();
String result=new String(client.getBody(url, parms)); System.out.println(result);
}
}
