Java使用HttpClient实现Post请求实例

importorg.apache.http.Header;

importorg.apache.http.HttpResponse;

importorg.apache.http.HttpStatus;

importorg.apache.http.client.HttpClient;

importorg.apache.http.client.methods.HttpPost;

importorg.apache.http.entity.StringEntity;

importorg.apache.http.impl.client.DefaultHttpClient;

importorg.apache.http.params.CoreConnectionPNames;

importjava.util.UUID;

importnet.sf.json.JSONObject;

importjava.nio.charset.Charset;

publicstaticbooleanhttpPostWithJson(JSONObject jsonObj,String url,String appId){

booleanisSuccess =false;

HttpPost post =null;

try{

HttpClient httpClient =newDefaultHttpClient();

// 设置超时时间

httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,2000);

httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,2000);

post =newHttpPost(url);

// 构造消息头

post.setHeader("Content-type","application/json; charset=utf-8");

post.setHeader("Connection","Close");

String sessionId = getSessionId();

post.setHeader("SessionId", sessionId);

post.setHeader("appid", appid);

// 构建消息实体

StringEntity entity =newStringEntity(jsonObj.toString(), Charset.forName("UTF-8"));

entity.setContentEncoding("UTF-8");

// 发送Json格式的数据请求

entity.setContentType("application/json");

post.setEntity(entity);

HttpResponse response = httpClient.execute(post);

// 检验返回码

intstatusCode = response.getStatusLine().getStatusCode();

if(statusCode != HttpStatus.SC_OK){

LogUtil.info("请求出错: "+statusCode);

isSuccess =false;

}else{

intretCode =0;

String sessendId ="";

// 返回码中包含retCode及会话Id

for(Header header : response.getAllHeaders()){

if(header.getName().equals("retcode")){

retCode = Integer.parseInt(header.getValue());

}

if(header.getName().equals("SessionId")){

sessendId = header.getValue();

}

}

if(ErrorCodeHelper.IAS_SUCCESS != retCode ){

// 日志打印

LogUtil.info("error return code, sessionId: "sessendId"t"+"retCode: "+retCode);

isSuccess =false;

}else{

isSuccess =true;

}

}

}catch(Exception e) {

e.printStackTrace();

isSuccess =false;

}finally{

if(post !=null){

try{

post.releaseConnection();

Thread.sleep(500);

}catch(InterruptedException e) {

e.printStackTrace();

}

}

}

returnisSuccess;

}

// 构建唯一会话Id

publicstaticString getSessionId(){

UUID uuid = UUID.randomUUID();

String str = uuid.toString();

returnstr.substring(0,8) + str.substring(9,13) + str.substring(14,18) + str.substring(19,23) + str.substring(24);

}

org.apache.httpcomponents

httpclient

4.4.1

org.apache.httpcomponents

httpcore

4.4.1