HttpClient post 请求实例
所需jar包：
commons-codec-1.3.jar
commons-httpclient-3.0.jar
commons-logging-1.1.1.jar
/** * */ package httpClient; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.net.URLEncoder; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpMethod; import org.apache.commons.httpclient.methods.GetMethod; import org.apache.commons.httpclient.methods.PostMethod; import org.apache.commons.httpclient.params.HttpMethodParams; /** * @ClassName: SimpleClient * @Description: TODO(这里用一句话描述这个类的作用) * @author zhoushun * @date 2014年2月13日 上午9:35:17 * */ public class SimpleClient { public static void main(String[] args) throws IOException { HttpClient client = new HttpClient(); //设置代理服务器地址和端口 //client.getHostConfiguration().setProxy("proxy_host_addr",proxy_port); //使用GET方法，如果服务器需要通过HTTPS连接，那只需要将下面URL中的http换成https // HttpMethod method = new GetMethod("http://10.1.14.20:8088/workflowController/service/todo/addTask"); //使用POST方法 PostMethod method = new PostMethod("http://10.1.14.20:8088/workflowController/service/todo/addTask"); String s = "http://10.1.48.16:8080/workflow/send-tDocSend/toFormPage.action?modelName=%E6%96%B0%E5%8F%91%E6%96%87%E6%B5%81%E7%A8%8B&incidentNo=65&processName=%E6%96%B0%E5%8F%91%E6%96%87%E6%B5%81%E7%A8%8B&pinstanceId=65&taskUserName=ST/G001000001612549&stepName=%E5%8F%91%E6%96%87%E9%80%9A%E7%9F%A5&taskId=12261064757e7498937e6b29ea80ca&taskuser=ST/G001000001612549&codeId=13"; String ms = "{\"app\": \"standardWork\",\"type\": 0," + "\"occurTime\": \"2013-11-14 11:22:02\",\"title\": \"-------流程标题-------\"," + "\"loginName\": \"ST/G01008000311\",\"status\": 0,\"removed\": 0," + " \"typename\": \"流程名称11\"," + "\"url\": \""+URLEncoder.encode(s,"UTF-8")+"\"," + "\"pname\": \"主流程名称\",\"pincident\": 1," + "\"cname\": \"子流程实例号\",\"cincident\": 1," + "\"stepName\": \"当前步骤\"," + "\"initiator\": \"ST/G01008000311\"}"; ((PostMethod) method).addParameter("data", ms); HttpMethodParams param = method.getParams(); param.setContentCharset("UTF-8"); client.executeMethod(method); //打印服务器返回的状态 System.out.println(method.getStatusLine()); //打印返回的信息 System.out.println(); InputStream stream = method.getResponseBodyAsStream(); BufferedReader br = new BufferedReader(new InputStreamReader(stream, "UTF-8")); StringBuffer buf = new StringBuffer(); String line; while (null != (line = br.readLine())) { buf.append(line).append("\n"); } System.out.println(buf.toString()); //释放连接 method.releaseConnection(); } }
另附上 新浪微博 上的 调用demo中的一些 方法：
public HttpClient(int maxConPerHost, int conTimeOutMs, int soTimeOutMs, int maxSize) { connectionManager = new MultiThreadedHttpConnectionManager(); HttpConnectionManagerParams params = connectionManager.getParams(); params.setDefaultMaxConnectionsPerHost(maxConPerHost); params.setConnectionTimeout(conTimeOutMs); params.setSoTimeout(soTimeOutMs); HttpClientParams clientParams = new HttpClientParams(); // 忽略cookie 避免 Cookie rejected 警告 clientParams.setCookiePolicy(CookiePolicy.IGNORE_COOKIES); client = new org.apache.commons.httpclient.HttpClient(clientParams, connectionManager); Protocol myhttps = new Protocol("https", new MySSLSocketFactory(), 443); Protocol.registerProtocol("https", myhttps); this.maxSize = maxSize; // 支持proxy if (proxyHost != null && !proxyHost.equals("")) { client.getHostConfiguration().setProxy(proxyHost, proxyPort); client.getParams().setAuthenticationPreemptive(true); if (proxyAuthUser != null && !proxyAuthUser.equals("")) { client.getState().setProxyCredentials( AuthScope.ANY, new UsernamePasswordCredentials(proxyAuthUser, proxyAuthPassword)); log("Proxy AuthUser: " + proxyAuthUser); log("Proxy AuthPassword: " + proxyAuthPassword); } } } /** * log调试 * */ private static void log(String message) { if (DEBUG) { log.debug(message); } } /** * 处理http getmethod 请求 * */ public Response get(String url) throws WeiboException { return get(url, new PostParameter[0]); } public Response get(String url, PostParameter[] params) throws WeiboException { log("Request:"); log("GET:" + url); if (null != params && params.length > 0) { String encodedParams = HttpClient.encodeParameters(params); if (-1 == url.indexOf("?")) { url += "?" + encodedParams; } else { url += "&" + encodedParams; } } GetMethod getmethod = new GetMethod(url); return httpRequest(getmethod); } public Response get(String url, PostParameter[] params, Paging paging) throws WeiboException { if (null != paging) { List<PostParameter> pagingParams = new ArrayList<PostParameter>(4); if (-1 != paging.getMaxId()) { pagingParams.add(new PostParameter("max_id", String .valueOf(paging.getMaxId()))); } if (-1 != paging.getSinceId()) { pagingParams.add(new PostParameter("since_id", String .valueOf(paging.getSinceId()))); } if (-1 != paging.getPage()) { pagingParams.add(new PostParameter("page", String .valueOf(paging.getPage()))); } if (-1 != paging.getCount()) { if (-1 != url.indexOf("search")) { // search api takes "rpp" pagingParams.add(new PostParameter("rpp", String .valueOf(paging.getCount()))); } else { pagingParams.add(new PostParameter("count", String .valueOf(paging.getCount()))); } } PostParameter[] newparams = null; PostParameter[] arrayPagingParams = pagingParams .toArray(new PostParameter[pagingParams.size()]); if (null != params) { newparams = new PostParameter[params.length + pagingParams.size()]; System.arraycopy(params, 0, newparams, 0, params.length); System.arraycopy(arrayPagingParams, 0, newparams, params.length, pagingParams.size()); } else { if (0 != arrayPagingParams.length) { String encodedParams = HttpClient .encodeParameters(arrayPagingParams); if (-1 != url.indexOf("?")) { url += "&" + encodedParams; } else { url += "?" + encodedParams; } } } return get(url, newparams); } else { return get(url, params); } } /** * 处理http deletemethod请求 */ public Response delete(String url, PostParameter[] params) throws WeiboException { if (0 != params.length) { String encodedParams = HttpClient.encodeParameters(params); if (-1 == url.indexOf("?")) { url += "?" + encodedParams; } else { url += "&" + encodedParams; } } DeleteMethod deleteMethod = new DeleteMethod(url); return httpRequest(deleteMethod); } /** * 处理http post请求 * */ public Response post(String url, PostParameter[] params) throws WeiboException { return post(url, params, true); } public Response post(String url, PostParameter[] params, Boolean WithTokenHeader) throws WeiboException { log("Request:"); log("POST" + url); PostMethod postMethod = new PostMethod(url); for (int i = 0; i < params.length; i++) { postMethod.addParameter(params[i].getName(), params[i].getValue()); } HttpMethodParams param = postMethod.getParams(); param.setContentCharset("UTF-8"); if (WithTokenHeader) { return httpRequest(postMethod); } else { return httpRequest(postMethod, WithTokenHeader); } } /** * 支持multipart方式上传图片 * */ public Response multPartURL(String url, PostParameter[] params, ImageItem item) throws WeiboException { PostMethod postMethod = new PostMethod(url); try { Part[] parts = null; if (params == null) { parts = new Part[1]; } else { parts = new Part[params.length + 1]; } if (params != null) { int i = 0; for (PostParameter entry : params) { parts[i++] = new StringPart(entry.getName(), (String) entry.getValue()); } parts[parts.length - 1] = new ByteArrayPart(item.getContent(), item.getName(), item.getContentType()); } postMethod.setRequestEntity(new MultipartRequestEntity(parts, postMethod.getParams())); return httpRequest(postMethod); } catch (Exception ex) { throw new WeiboException(ex.getMessage(), ex, -1); } } public Response multPartURL(String fileParamName, String url, PostParameter[] params, File file, boolean authenticated) throws WeiboException { PostMethod postMethod = new PostMethod(url); try { Part[] parts = null; if (params == null) { parts = new Part[1]; } else { parts = new Part[params.length + 1]; } if (params != null) { int i = 0; for (PostParameter entry : params) { parts[i++] = new StringPart(entry.getName(), (String) entry.getValue()); } } FilePart filePart = new FilePart(fileParamName, file.getName(), file, new MimetypesFileTypeMap().getContentType(file), "UTF-8"); filePart.setTransferEncoding("binary"); parts[parts.length - 1] = filePart; postMethod.setRequestEntity(new MultipartRequestEntity(parts, postMethod.getParams())); return httpRequest(postMethod); } catch (Exception ex) { throw new WeiboException(ex.getMessage(), ex, -1); } } public Response httpRequest(HttpMethod method) throws WeiboException { return httpRequest(method, true); }
