详解Java发送HTTP请求
前言
请求http的Demo是个人亲测过，目前该方式已经在线上运行着。因为是http请求，所有发送post和get请求的demo都有在下方贴出，包括怎么测试，大家可直接copy到自己的项目中使用。
正文
使用须知
为了避免大家引错包我把依赖和涉及到包路径给大家
importjava.net.HttpURLConnection; importjava.net.URI; importorg.apache.http.HttpResponse; importorg.apache.http.HttpStatus; importorg.apache.http.client.methods.HttpGet; importorg.apache.http.client.methods.HttpPost; importorg.apache.http.client.utils.URIBuilder; importorg.apache.http.entity.StringEntity; importorg.apache.http.impl.client.CloseableHttpClient; importorg.apache.http.impl.client.DefaultHttpClient; importorg.apache.http.impl.client.HttpClients; importorg.apache.http.util.EntityUtils; importcom.fasterxml.jackson.databind.ObjectMapper;
org.apache.httpcomponents httpcore 4.4.8 org.apache.httpcomponents httpclient 4.5.3
HTTP发送get请求
首先我们引入两个包
发送get请求的工具类，可直接copy使用即可
另外，我抛出异常的代码大家改成自己业务的异常，不需要就删除掉。
参数说明：
host：ip
servUri：url
reString：参数
publicstaticStringgetHttpData(Stringhost,StringservUri,StringreString)throwsException{
StringBuffersb=newStringBuffer();
sb.append("getHttpData:host:"+host+",servUri:"+servUri+",reString:"+reString);
StringstrResp=null;
try{
URIuri=newURIBuilder().setScheme("http").setHost(host).setPath(servUri)
.setParameter("strInfo",reString).build();
HttpGethttpGet=newHttpGet(uri);
CloseableHttpClientclient3=HttpClients.createDefault();
HttpResponseresp;
resp=client3.execute(httpGet);
if(resp.getStatusLine().getStatusCode()==HttpURLConnection.HTTP_OK){
strResp=EntityUtils.toString(resp.getEntity());
logger.info("thereturnresult:{}",strResp);
}else{
logger.info("ErrorResponse:",resp.getStatusLine().toString());
thrownewCommonBusinessException(CommonConstants.TASK_RELEASE_WCF,
CommonConstants.TASK_RELEASE_WCF_DESC);
}
}catch(Exceptione){
logger.error(sb.toString()+":"+e.getMessage(),e.getCause());
thrownewCommonBusinessException(CommonConstants.TASK_RELEASE_WCF,CommonConstants.TASK_RELEASE_WCF_DESC);
}
returnstrResp;
}
HTTP发送post请求
发送post分两种,我分两种的原因是为了让大家方便，想传对象和json可以直接复制过用就可以用，不用你们在转了。
第一种是直接接收json
参数明说：
url：url
json：参数
publicstaticStringdoPostData(Stringurl,Stringjson)throwsException{
DefaultHttpClientclient=newDefaultHttpClient();
HttpPostpost=newHttpPost(url);
Stringresult="";
HttpResponseres=null;
try{
StringEntitys=newStringEntity(json.toString(),"UTF-8");
s.setContentType("application/json");
post.setHeader("Accept","application/json");
post.setHeader("Content-type","application/json;charset=utf-8");
post.setEntity(s);
res=client.execute(post);
if(res.getStatusLine().getStatusCode()==HttpStatus.SC_OK){
result=EntityUtils.toString(res.getEntity());
returnHttpStatus.SC_OK+"";
}
}catch(Exceptione){
if(res==null){
return"HttpResponse为null!";
}
thrownewRuntimeException(e);
}
if(res==null||res.getStatusLine()==null){
return"无响应";
}
returnres.getStatusLine().getStatusCode()+"";
}
@Test
publicvoidtest12()throwsException{
StringHOST="http://eipwcf.aspirecn.com/SvcEF/Service1.svc/WCF_EF_MSA_GetDataInfo_P";
HttpClientclient=newHttpClient();
JSONObjectjson=newJSONObject();
json.put("msgId",msgId);
Stringreslut=client.doPostData(HOST,json);
}
第二种是参数是对象
参数说明：
url：url
tram：对象
publicstaticStringdoHttpPostData(Stringurl,TaskReleaseApprovalModeltram)
throwsException{
StringBuffersb=newStringBuffer();
sb.append("doHttpPostData:url:"+url+",tram:"+tram.toString()+",contentType:"+contentType);
logger.info(sb.toString());
StringtmpString="";
HttpPostrequest=newHttpPost(url);
request.setHeader("Accept","application/json");
request.setHeader("Content-type","application/json");
ObjectMappermapper=newObjectMapper();
StringjsonString;
try{
jsonString=mapper.writeValueAsString(tram);
StringEntityentity=newStringEntity(jsonString,"UTF-8");
request.setEntity(entity);
CloseableHttpClientclient=HttpClients.createDefault();
HttpResponseresponse=client.execute(request);
if(response.getStatusLine().getStatusCode()==HttpURLConnection.HTTP_OK){
tmpString=EntityUtils.toString(response.getEntity());
logger.info("thepostresult:tmpString:{}",tmpString);
}else{
logger.info("thepostfailure:tmpString:",tmpString);
thrownewCommonBusinessException(CommonConstants.TASK_RELEASE_WCF,
CommonConstants.TASK_RELEASE_WCF_DESC);
}
}catch(Exceptione){
logger.error(sb.toString()+":"+e.getMessage(),e.getCause());
thrownewCommonBusinessException(CommonConstants.TASK_RELEASE_POSTWCF,
CommonConstants.TASK_RELEASE_POSTWCF_DESC);
}
returntmpString;
}
这个方法我想不用写测试类大家也会用，传过去对象和地址就可以了，很方便很简单。
以上所述是小编给大家介绍的Java发送HTTP请求详解整合，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持！