Java httpcomponents发送get post请求代码实例
引入的包为：
org.apache.httpcomponents httpclient 4.5.8
实现的工具类为：
importcom.alibaba.fastjson.JSON;
importorg.apache.http.NameValuePair;
importorg.apache.http.client.entity.UrlEncodedFormEntity;
importorg.apache.http.client.methods.CloseableHttpResponse;
importorg.apache.http.client.methods.HttpGet;
importorg.apache.http.client.methods.HttpPost;
importorg.apache.http.impl.client.CloseableHttpClient;
importorg.apache.http.impl.client.HttpClients;
importorg.apache.http.message.BasicNameValuePair;
importorg.slf4j.Logger;
importorg.slf4j.LoggerFactory;
importjava.io.IOException;
importjava.util.ArrayList;
importjava.util.HashMap;
importjava.util.List;
importjava.util.Map;
publicclassHttpClientHelper{
privatestaticLoggerlogger=LoggerFactory.getLogger(HttpClientHelper.class);
privateHttpClientHelper(){
}
/**
*发起POST请求
*
*@paramurlurl
*@paramparamMap参数的Map格式
*/
publicstaticvoidsendPost(Stringurl,MapparamMap){
logger.info("开始发起POST请求，请求地址为{}，参数为{}",url,JSON.toJSON(paramMap));
CloseableHttpResponseresponse=null;
try(CloseableHttpClienthttpClient=HttpClients.createDefault()){
Stringencoding="utf-8";
//创建post请求对象
HttpPosthttpPost=newHttpPost(url);
//装填请求参数
Listlist=newArrayList<>();
for(Map.Entryentry:paramMap.entrySet()){
list.add(newBasicNameValuePair(entry.getKey(),entry.getValue()));
}
//设置参数到请求对象中
httpPost.setEntity(newUrlEncodedFormEntity(list,encoding));
httpPost.setHeader("Content-type","application/x-www-form-urlencoded");
httpPost.setHeader("User-Agent","Mozilla/4.0(compatible;MSIE5.0;WindowsNT;DigExt)");
response=httpClient.execute(httpPost);
}catch(IOExceptione){
logger.error("POST请求发出失败，请求的地址为{}，参数为{}，错误信息为{}",url,JSON.toJSON(paramMap),e.getMessage(),e);
}finally{
try{
if(response!=null){
response.close();
}
}catch(IOExceptione){
logger.error("POST请求response关闭异常，错误信息为{}",e.getMessage(),e);
}
}
}
/**
*发起GET请求
*
*@paramurlParamurl请求，包含参数
*/
publicstaticvoidsendGet(StringurlParam){
logger.info("开始发起GET请求，请求地址为{}",urlParam);
HttpGethttpGet=newHttpGet(urlParam);
CloseableHttpResponseresponse=null;
try(CloseableHttpClienthttpClient=HttpClients.createDefault()){
response=httpClient.execute(httpGet);
intstatus=response.getStatusLine().getStatusCode();
logger.error("GET请求发出成功，请求的地址为{}，返回状态为{}",urlParam,status);
}catch(IOExceptione){
logger.error("GET请求发出失败，请求的地址为{}，错误信息为{}",urlParam,e.getMessage(),e);
}finally{
try{
if(response!=null){
response.close();
}
}catch(IOExceptione){
logger.error("GET请求response关闭异常，错误信息为{}",e.getMessage(),e);
}
}
}
publicstaticvoidmain(String[]args){
Stringurl="https://jiashubing.cn/tencenttest";
//需要传入的参数
Mapmap=newHashMap<>();
map.put("code","js");
map.put("day","0");
map.put("city","北京");
map.put("dfc","1");
map.put("charset","utf-8");
sendPost(url,map);
StringurlParam="https://jiashubing.cn/talk/document?fileid=1234ji贾树丙";
sendGet(urlParam);
}
}
如果POST请求想要发送Json格式的数据，只需要修改成这样：
Stringjson=JSON.toJSONString(paramMap);
StringEntityrequestEntity=newStringEntity(json,"utf-8");
httpPost.setEntity(requestEntity);
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。
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