httpclient（httpclient 无响应怎么办）

本文目录

• httpclient 无响应怎么办
• 如何接收httpclient发送的请求
• 如何使用httpclient访问双向ssl认证的网站
• 如何接收httpclient 文件上传
• HttpClient和HttpURLConnection的区别
• netty httpclient和httpclient的区别
• httpclient和restclient有什么区别
• HttpClient3为什么比HttpClient4性能要好很多

httpclient 无响应怎么办

String result = ““;
DefaultHttpClient httpclient = new DefaultHttpClient();
//设置超时事件
HttpConnectionParams.setConnectionTimeout(httpclient.getParams(), Constants.CONNECTIONTIMEOUTMILLIS);
HttpConnectionParams.setSoTimeout(httpclient.getParams(), Constants.SOCKETTIMEOUTMILLIS);
try {
HttpGet httpget = new HttpGet(url);
ResponseHandler《String》 responseHandler = new BasicResponseHandler();
String responseBody = httpclient.execute(httpget, responseHandler);
result=responseBody;
logger.debug(“ end!“);
}catch(Exception e){
logger.debug(“ error:“+e);
} finally {
httpclient.getConnectionManager().shutdown();
}
return result;

如何接收httpclient发送的请求

客户端向服务器发送数据份两种情况SSL单向验证SSL双向验证
1.SSL单向验证
代码：
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 = ““;
}
public String sendData(String data) {
String receivedData = null;
try {
Map paramsData = new HashMap();
paramsData.put(“data“, data);
receivedData = send(Url, paramsData);
} catch (Exception e) {
e.printStackTrace();
}
return receivedData;
}
public static String send(String url, Map 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;
int index = 0;
for (String key : paramsMap.keySet()) {
datas = 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!“);
}
}
能现异
1.java.net.ConnectException: Connection refused: connect
服务器没启
2 .javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed
服务端证书信解决办见篇文章
3.java.net.SocketException: Software caused connection abort: recv failed
由于服务端配置SSL双向认证客户端发送数据按照服务器单向认证发送即没客户端证书信息起发送给服务端
4.org.apache.commons.httpclient.NoHttpResponseException
般服务端防火墙原拦截客户端请求
另外服务端负载重现问题
5.javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake
由于服务端配置SSL双向认证客户端发送数据按照服务器单向认证发送即没客户端证书信息起发送给服务端服务端验证客户端证书发现客户端没证书断握手连接
2.SSL双向验证
双向验证暂知道何用HTTPCLIENT发送数据需要双向验证发送数据参考我另外文章另外知道HTTPCLIENT何双向验证发送数据恳请指教

如何使用httpclient访问双向ssl认证的网站

首先
create a custom class from org.apache.http.conn.ssl.SSLSocketFactory
Java code?
public class MySSLSocketFactory extends SSLSocketFactory {
SSLContext sslContext = SSLContext.getInstance(“TLS“);

public MySSLSocketFactory(KeyStore truststore) throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
super(truststore);

TrustManager tm = new X509TrustManager() {
public void checkClientTrusted(X509Certificate chain, String authType) throws CertificateException {
}

public void checkServerTrusted(X509Certificate chain, String authType) throws CertificateException {
}

public X509Certificate getAcceptedIssuers() {
return null;
}
};

sslContext.init(null, new TrustManager { tm }, null);
}

@Override
public Socket createSocket(Socket socket, String host, int port, boolean autoClose) throws IOException, UnknownHostException {
return sslContext.getSocketFactory().createSocket(socket, host, port, autoClose);
}

@Override
public Socket createSocket() throws IOException {
return sslContext.getSocketFactory().createSocket();
}
}
然后
Java code?
//SSLSocketFactory socketFactory = new SSLSocketFactory(trustStore);
SSLSocketFactory socketFactory = new MySSLSocketFactory(trustStore);
socketFactory.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

Scheme sch = new Scheme(“https“, socketFactory, 8443);
httpclient.getConnectionManager().getSchemeRegistry().register(sch);
...

如何接收httpclient 文件上传

在struts2中结合HttpClient进行文件上传
最近遇到了用httpclient进行上传文件的问题,下面我就和大家简单的说一下:
package com.imps.action;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.List;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.PostMethod;
public class TabinfoAction extends BaseAction
{
private File myFile;
private String myFileFileName;// 文件名
private Integer myFileFileSize;// 文件大小
private String myFileContentType;// 文件类型
public String uploadPost()
{
String posturl =“http://127.0.0.1:8080/settabimage.aspx“;
System.out.println(posturl);
String status=null;
for(int i=0;i《myFile.length;i++)
{
FileInputStream file=new FileInputStream(myFile);
InputStream in = new BufferedInputStream(file);
PostMethod post=new PostMethod(posturl);
post.setRequestBody(in);
HttpClient client = new HttpClient();
client.executeMethod(post);
String response=new String(post.getResponseBodyAsString().getBytes(“ISO-8859-1“),“UTF-8“);
post.releaseConnection();
in.close();
file.close();
}
}
public File getMyFile() {
return myFile;
}
public void setMyFile(File myFile) {
this.myFile = myFile;
}
public String getMyFileFileName() {
return myFileFileName;
}
public void setMyFileFileName(String myFileFileName) {
this.myFileFileName = myFileFileName;
}
public Integer getMyFileFileSize() {
return myFileFileSize;
}
public void setMyFileFileSize(Integer myFileFileSize) {
this.myFileFileSize = myFileFileSize;
}
public String getMyFileContentType() {
return myFileContentType;
}
public void setMyFileContentType(String myFileContentType) {
this.myFileContentType = myFileContentType;
}
千万记住不要记忘记关闭流和释放http连接

HttpClient和HttpURLConnection的区别

首先：在 JDK 的 java.net 包中已经提供了访问 HTTP 协议的基本功能：HttpURLConnection。但是对于大部分应用程序来说，JDK 库本身提供的功能还不够丰富和灵活。
在Android中，androidSDK中集成了Apache的HttpClient模块，用来提供高效的、最新的、功能丰富的支持 HTTP 协议工具包，并且它支持 HTTP 协议最新的版本和建议。使用HttpClient可以快速开发出功能强大的Http程序。
其次：HttpClient是个很不错的开源框架，封装了访问

netty httpclient和httpclient的区别

netty是nio服务端客户端框架。可以快速简单的开发网络程序。
netty

httpclient和restclient有什么区别

HttpClient3为什么比HttpClient4性能要好很多

HttpClient 4：
连接超时：
httpclient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,60000);
// 或者
HttpConnectionParams.setConnectionTimeout(params, 6000);
读取超时：
httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,60000);
// 或者
HttpConnectionParams.setSoTimeout(params, 60000);
HttpClient 3：
连接超时：
httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(60000);
读取超时：
httpClient.getHttpConnectionManager().getParams().setSoTimeout(60000);