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

[java] view
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/**

*

*/

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：

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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);

}