客户端怎么使用httpclient向https服务器发送数据 _Web前端

客户端如何使用httpclient向https服务器发送数据

客户端向服务器发送数据时，份两种情况，SSL单向验证和SSL双向验证

1.SSL单向验证时

代码如下：

Java代码 ?

import ?java.io.IOException;??
import ?java.util.HashMap;??
import ?java.util.Map;??
??
import ?org.apache.commons.httpclient.HttpClient;??
import ?org.apache.commons.httpclient.HttpException;??
import ?org.apache.commons.httpclient.HttpStatus;??
import ?org.apache.commons.httpclient.NameValuePair;??
import ?org.apache.commons.httpclient.methods.PostMethod;??
import ?org.apache.commons.httpclient.params.HttpClientParams;??
import ?org.apache.commons.httpclient.params.HttpMethodParams;??
import ?org.apache.commons.logging.Log;??
import ?org.apache.commons.logging.LogFactory;??
??
public ? class ?ClientSendData?{??
????static ?Log?log?=?LogFactory.getLog(ClientSendData. class );??
??
????private ?String?Url;??
??
????//?初始化数据 ??
????public ?ClientSendData()?{??
????????Url?=?"https://test.yihaodian.com:8443/ims/feedbackToPingAn_getData.action" ;??
????}??
??
????public ?String?sendData(String?data)?{??
????????String?receivedData?=?null ;??
????????try ?{??
??
????????????Map<String,?String>?paramsData?=?new ?HashMap<String,?String>();??
????????????paramsData.put("data" ,?data);??
????????????receivedData?=?send(Url,?paramsData);??
????????}?catch ?(Exception?e)?{??
????????????e.printStackTrace();??
????????}??
????????return ?receivedData;??
????}??
??
????public ? static ?String?send(String?url,?Map<String,?String>?paramsMap)?{??
????????String?result?=?null ;??
????????PostMethod?postMethod?=?null ;??
????????HttpClient?httpClient?=?new ?HttpClient();??
??
????????httpClient.getParams().setParameter(??
????????????????HttpMethodParams.HTTP_CONTENT_CHARSET,?"utf-8" );??
????????postMethod?=?new ?PostMethod(url);??
??
????????if ?(paramsMap?!=? null ?&&?paramsMap.size()?>? 0 )?{??
????????????NameValuePair[]?datas?=?new ?NameValuePair[paramsMap.size()];??
????????????int ?index?=? 0 ;??
????????????for ?(String?key?:?paramsMap.keySet())?{??
????????????????datas[index++]?=?new ?NameValuePair(key,?paramsMap.get(key));??
????????????}??
????????????postMethod.setRequestBody(datas);??
??
????????}??
??
????????HttpClientParams?httparams?=?new ?HttpClientParams();??
????????httparams.setSoTimeout(60000 );??
????????postMethod.setParams(httparams);??
??
????????try ?{??
????????????int ?statusCode?=?httpClient.executeMethod(postMethod);??
????????????if ?(statusCode?==?HttpStatus.SC_OK)?{??
????????????????result?=?postMethod.getResponseBodyAsString();??
????????????????log.info("发送成功！" );??
????????????}?else ?{??
????????????????log.error("?http?response?status?is?" ?+?statusCode);??
????????????}??
??
????????}?catch ?(HttpException?e)?{??
????????????log.error("error?url=" ?+?url,?e);??
????????}?catch ?(IOException?e)?{??
????????????log.error("error?url=" ?+?url,?e);??
????????}?finally ?{??
????????????if ?(postMethod?!=? null )?{??
????????????????postMethod.releaseConnection();??
????????????}??
????????}??
??
????????return ?result;??
????}??
??
????public ? static ? void ?main(String[]?args)?{??
????????ClientSendData?t?=?new ?ClientSendData();??
????????t.sendData("测试SSL单项连接，向服务端发送数据!" );??
????}??
}??

可能出现的异常

1.java.net.ConnectException: Connection refused: connect

服务器没有启动

2 .javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed

服务端的证书是不可信的。解决办法见这篇文章 http://zhuyuehua.iteye.com/blog/1102347

3.java.net.SocketException: Software caused connection abort: recv failed

这是由于服务端配置的是SSL双向认证，而客户端发送数据是按照服务器是单向认证时发送的，即没有将客户端证书信息一起发送给服务端。

4.org.apache.commons.httpclient.NoHttpResponseException

这一般是服务端防火墙的原因。拦截了客户端请求。

另外，当服务端负载过重时，也会出现此问题。

5.javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake

这是由于服务端配置的是SSL双向认证，而客户端发送数据是按照服务器是单向认证时发送的，即没有将客户端证书信息一起发送给服务端。服务端验证客户端证书时，发现客户端没有证书，然后就断开了握手连接。