java HttpClient传输json格式的参数实例讲解
最近的一个接口项目,传的参数要求是json,需要特殊处理一下。
重点是这两句话:
httpPost.setHeader("Content-Type","application/json;charset=UTF-8"); se.setContentType(CONTENT_TYPE_TEXT_JSON);
这两句话的作用与jmeter的设置header信息类似
packagecom.base; importjava.io.UnsupportedEncodingException; importorg.apache.http.HttpEntity; importorg.apache.http.client.methods.CloseableHttpResponse; importorg.apache.http.client.methods.HttpPost; importorg.apache.http.entity.StringEntity; importorg.apache.http.impl.client.DefaultHttpClient; importorg.apache.http.impl.conn.PoolingClientConnectionManager; importorg.apache.http.util.EntityUtils; /** *@authorQiaoJiafei *@version创建时间:2015年11月4日下午1:55:45 *类说明 */ publicclassHttpGetByJson{ publicstaticvoidmain(Stringargs[])throwsException{ finalStringCONTENT_TYPE_TEXT_JSON="text/json"; DefaultHttpClientclient=newDefaultHttpClient( newPoolingClientConnectionManager()); Stringurl="http://172.16.30.226:8091/svc/authentication/register"; Stringjs="{\"userName\":\"18600363833\",\"validateChar\":\"706923\",\"randomChar\":\"706923\",\"password\":\"123456\",\"confirmPwd\":\"123456\",\"recommendMobile\":\"\",\"idCard\":\"320601197608285792\",\"realName\":\"阙岩\",\"verifyCode\"}"; HttpPosthttpPost=newHttpPost(url); httpPost.setHeader("Content-Type","application/json;charset=UTF-8"); StringEntityse=newStringEntity(js); se.setContentType(CONTENT_TYPE_TEXT_JSON); httpPost.setEntity(se); CloseableHttpResponseresponse2=null; response2=client.execute(httpPost); HttpEntityentity2=null; entity2=response2.getEntity(); Strings2=EntityUtils.toString(entity2,"UTF-8"); System.out.println(s2); } }
补充:HttpClient以json形式的参数调用http接口并对返回的json数据进行处理(可以带文件)
1、参数的url就是被调用的地址,map是你要传的参数。参数转成json我使用的是gson方式转换的。
主要使用的jar包有httpclient-4.5.3.jar、httpcore-4.4.6.jar、commons-codec-1.9.jar、gson-2.2.4.jar和commons-logging-1.2.jar。
如果发送的post请求想传送文件,需添加httpmime-4.5.3.jar包,并设置如下代码:
HttpEntitymultipartEntityBuilder=MultipartEntityBuilder.create().addBinaryBody("file",newFile("D:\\workspace\\programm\\WebContent\\programm\\1991.zip")).build();
第一个参数表示请求字段名,第二个参数就是文件。
还想添加参数则
HttpEntitymultipartEntityBuilder=MultipartEntityBuilder.create().addTextBody("name","张三").addBinaryBody("file",newFile("D:\\workspace\\programm\\WebContent\\programm\\1991.zip")).build(); httpPost.setEntity(multipartEntityBuilder);
importjava.io.IOException; importjava.util.Map; importorg.apache.http.HttpEntity; importorg.apache.http.client.ClientProtocolException; importorg.apache.http.client.methods.CloseableHttpResponse; importorg.apache.http.client.methods.HttpPost; importorg.apache.http.entity.StringEntity; importorg.apache.http.impl.client.CloseableHttpClient; importorg.apache.http.impl.client.HttpClients; importorg.apache.http.util.EntityUtils; importcom.google.gson.Gson; publicclassHttpClientUtil{ privatefinalstaticStringCONTENT_TYPE_TEXT_JSON="text/json"; publicstaticStringpostRequest(Stringurl,Mapparam)throwsClientProtocolException,IOException{ CloseableHttpClientclient=HttpClients.createDefault(); HttpPosthttpPost=newHttpPost(url); httpPost.setHeader("Content-Type","application/json;charset=UTF-8"); Gsongson=newGson(); Stringparameter=gson.toJson(param); StringEntityse=newStringEntity(parameter); se.setContentType(CONTENT_TYPE_TEXT_JSON); httpPost.setEntity(se); CloseableHttpResponseresponse=client.execute(httpPost); HttpEntityentity=response.getEntity(); Stringresult=EntityUtils.toString(entity,"UTF-8"); returnresult; } }
2、返回的结果也可以使用gson转换成对象进行下一步操作。
importcom.google.gson.Gson; publicclassGsonUtil{ publicstaticTjsonToObject(StringjsonData,Class type){ Gsongson=newGson(); Tresult=gson.fromJson(jsonData,type); returnresult; } publicstaticvoidmain(String[]args){ Stringjson="{'id':'1','name':'zhang','address':'Hubei'}"; jsonToObject(json,Person.class); Personperson=jsonToObject(json,Person.class); System.out.println(person); } }
建立要转成的对象的类。
importjava.util.Date; publicclassPerson{ privateintid; privateStringname; privateintage; privateStringaddress;publicintgetId(){ returnid; } publicvoidsetId(intid){ this.id=id; } publicStringgetName(){ returnname; } publicvoidsetName(Stringname){ this.name=name; } publicintgetAge(){ returnage; } publicvoidsetAge(intage){ this.age=age; } publicStringgetAddress(){ returnaddress; } publicvoidsetAddress(Stringaddress){ this.address=address; } @Override publicStringtoString(){ return"Person[id="+id+",name="+name+",age="+age+",address="+address+"]"; } }
3、发送以键值对形式的参数的post请求
packagecom.avatarmind.httpclient; importjava.util.ArrayList; importjava.util.List; importorg.apache.http.HttpEntity; importorg.apache.http.NameValuePair; importorg.apache.http.client.entity.UrlEncodedFormEntity; importorg.apache.http.client.methods.CloseableHttpResponse; importorg.apache.http.client.methods.HttpPost; importorg.apache.http.impl.client.CloseableHttpClient; importorg.apache.http.impl.client.HttpClients; importorg.apache.http.message.BasicNameValuePair; importorg.apache.http.util.EntityUtils; publicclassHttpClient3{ publicstaticvoidmain(String[]args)throwsException{ CloseableHttpClientclient=HttpClients.createDefault(); Stringurl="http://yuntuapi.amap.com/datamanage/table/create"; HttpPosthttpPost=newHttpPost(url); //参数形式为key=value&key=value Listformparams=newArrayList (); formparams.add(newBasicNameValuePair("key","060212638b94290e3dd0648c15753b64")); formparams.add(newBasicNameValuePair("name","火狐")); //加utf-8进行编码 UrlEncodedFormEntityuefEntity=newUrlEncodedFormEntity(formparams,"UTF-8"); httpPost.setEntity(uefEntity); CloseableHttpResponseresponse=client.execute(httpPost); HttpEntityentity=response.getEntity(); Stringresult=EntityUtils.toString(entity,"UTF-8"); System.out.println(result); } }
以上为个人经验,希望能给大家一个参考,也希望大家多多支持毛票票。如有错误或未考虑完全的地方,望不吝赐教。