HTTPClient基础
使用HttpClient的一般步骤:
1:创建HTTPClient实例
2:创建某种连接方法的实例,并且传入URL
3:使用HTTPClint实例调用executeMethod,参数为某连接方法的实例
4:接收该方法的返回的状态,并对该状态进行判断
5:接收Response的返回值
6:释放连接
示例:
GET
1:创建实例
HTTPClient client = new HTTPClient()
2:创建GET连接方法实例
GetMethod get = new GetMethod(URL);
3:调用方法,获取状态
int status = client.executeMethod(get);
4:根据状态不同调用不同的处理方式,以下为状态为200,即正常的情况下
String result = get.getResponseBodyAsString();
5:释放连接
get.releaseConnection()
完整示例如下:
public class Test(){
public static void main(String[] args){
String url = "";
String result = null;
HttpClient client = new HttpClient();
GetMethod method = new GetMethod(url);
try{
int status = client.executeMethod(method);
if(status==200){
result = method.getResponseBodyAsString();
}
} catch(HttpException e){
e.printStackTrace();
} catch(IOException e){
e.printStackTrace();
} catch(Exception e){
e.printStackTrace();
} finally{
method.releaseConnection();
}
}
}POST
1:创建实例
HTTPClient client = new HTTPClient()
2:创建GET连接方法实例
PostMethod post = new PostMethod(URL);
3:获取POST参数
post.setRequestBody(data);
4:调用方法,获取状态
int status = client.executeMethod(post);
5:根据状态不同调用不同的处理方式,以下为状态为200,即正常的情况下
String result = get.getResponseBodyAsString();
6:释放连接
get.releaseConnection()
完整示例如下:
public class Test(){
public static void main(String[] args){
//获取请求的参数
String data = "test";
String url = "http://www.test.com";
String result = null;
HttpClient client = new HttpClient();
PostMethod method = new PostMethod(url);
method.setRequestBody(data);
try{
int status = client.executeMethod(method);
if(status==200){
result = method.getResponseBodyAsString();
}
} catch(HttpException e){
e.printStackTrace();
} catch(IOException e){
e.printStackTrace();
} catch(Exception e){
e.printStackTrace();
} finally{
method.releaseConnection();
}
}
} 相关推荐
84487600 2020-08-16
似水流年梦 2020-08-09
knightwatch 2020-07-26
fengchao000 2020-06-16
标题无所谓 2020-06-14
sicceer 2020-06-12
yanghui0 2020-06-09
yanghui0 2020-06-09
创建一个 HttpClient 实例,这个实例需要调用 Dispose 方法释放资源,这里使用了 using 语句。接着调用 GetAsync,给它传递要调用的方法的地址,向服务器发送 Get 请求。
wanghongsha 2020-06-04
jiaguoquan00 2020-05-26
zhaolisha 2020-05-16
wanghongsha 2020-05-05
wanghongsha 2020-04-14
knightwatch 2020-04-11
hygbuaa 2020-03-27
zergxixi 2020-03-24