Map<String,Object> map = new HashMap<>();
map.put("test","test");
String result = HttpClientUtils.getInstance().doPost(url, null, map);
package com.fxkj.common.util;
import com.alibaba.fastjson.JSONObject;
import com.fxkj.common.exception.BusinessException;
import com.fxkj.common.result.QCodeResult;
import org.apache.http.*;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
/**
* 分装一个http请求的工具类
*/
public class HttpClientUtils {
private static HttpClientUtils instance;
CloseHttpUtil closeHttpUtil = new CloseHttpUtil();
private HttpClientUtils() {
}
public static synchronized HttpClientUtils getInstance() {
if (instance == null) {
instance = new HttpClientUtils();
}
return instance;
}
/**
* <p>发送GET请求
*
* @param url GET请求地址(带参数)
* @param headerMap GET请求头参数容器
* @return 与当前请求对应的响应内容字
*/
public String doGet(String url, Map<String, Object> headerMap) {
String content = null;
CloseableHttpClient httpClient = getHttpClient();
try {
HttpGet getMethod = new HttpGet(url);
//头部请求信息
if (headerMap != null) {
Iterator iterator = headerMap.entrySet().iterator();
while (iterator.hasNext()) {
Entry entry = (Entry) iterator.next();
getMethod.addHeader(entry.getKey().toString(), entry.getValue().toString());
}
}
//发送get请求
CloseableHttpResponse httpResponse = httpClient.execute(getMethod);
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
try {
//读取内容
content = EntityUtils.toString(httpResponse.getEntity());
} finally {
httpResponse.close();
}
} else {
throw new BusinessException(httpResponse.getStatusLine().getReasonPhrase());
}
} catch (IOException ex) {
throw new BusinessException(ex.getMessage());
} finally {
try {
closeHttpClient(httpClient);
} catch (Exception e) {
throw new BusinessException(e.getMessage());
}
}
return content;
}
public String doGetRequest(String url, Map<String, String> headMap, Map<String, String> paramMap) {
// 获取连接客户端工具
CloseableHttpClient httpClient = HttpClients.createDefault();
String entityStr = null;
CloseableHttpResponse response = null;
try {
/*
* 由于GET请求的参数都是拼装在URL地址后方，所以我们要构建一个URL，带参数
*/
URIBuilder uriBuilder = new URIBuilder(url);
for (Entry<String, String> param : paramMap.entrySet()) {
uriBuilder.addParameter(param.getKey(), param.getValue());
}
// 根据带参数的URI对象构建GET请求对象
HttpGet httpGet = new HttpGet(uriBuilder.build());
/*
* 添加请求头信息
*/
if (null != headMap) {
for (Entry<String, String> header : headMap.entrySet()) {
httpGet.addHeader(header.getKey(), header.getValue());
}
}
/*httpGet.addHeader("Content-Type", "application/VIID+JSON;charset=utf8");
httpGet.addHeader("User-Identify","12345678905030000000");*/
closeHttpUtil.setTimeOut(httpGet);
// 执行请求
response = httpClient.execute(httpGet);
// 获得响应的实体对象
HttpEntity entity = response.getEntity();
// 使用Apache提供的工具类进行转换成字符串
entityStr = EntityUtils.toString(entity, "UTF-8");
} catch (ClientProtocolException e) {
System.err.println("Http协议出现问题");
e.printStackTrace();
} catch (ParseException e) {
System.err.println("解析错误");
e.printStackTrace();
} catch (URISyntaxException e) {
System.err.println("URI解析异常");
e.printStackTrace();
} catch (IOException e) {
System.err.println("IO异常");
e.printStackTrace();
} finally {
// 释放连接
closeHttpUtil.close(response, httpClient);
}
return entityStr;
}
/**
* <p>发送POST请求
*
* @param url POST请求地址
* @param headerMap POST请求头参数容器
* @param parameterMap POST请求参数容器
* @return 与当前请求对应的响应内容字
*/
public String doPost(String url, Map<String, Object> headerMap, Map<String, Object> parameterMap) {
String content = null;
CloseableHttpClient httpClient = getHttpClient();
try {
HttpPost postMethod = new HttpPost(url);
postMethod.setHeader("Content-Type", "application/json;charset=utf-8");
postMethod.setHeader("Accept", "application/json;charset=utf-8");
//头部请求信息
if (headerMap != null) {
Iterator iterator = headerMap.entrySet().iterator();
while (iterator.hasNext()) {
Entry entry = (Entry) iterator.next();
postMethod.addHeader(entry.getKey().toString(), entry.getValue().toString());
}
}
if (parameterMap != null) {
Iterator iterator = parameterMap.keySet().iterator();
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
while (iterator.hasNext()) {
String key = (String) iterator.next();
nvps.add(new BasicNameValuePair(key, String.valueOf(parameterMap.get(key))));
}
postMethod.setEntity(new UrlEncodedFormEntity(nvps, "UTF-8"));
}
CloseableHttpResponse httpResponse = httpClient.execute(postMethod);
if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
try {
//读取内容
content = EntityUtils.toString(httpResponse.getEntity());
} finally {
httpResponse.close();
}
} else {
throw new BusinessException(httpResponse.getStatusLine().getReasonPhrase());
}
} catch (IOException ex) {
throw new BusinessException(ex.getMessage());
} finally {
try {
closeHttpClient(httpClient);
} catch (Exception e) {
throw new BusinessException(e.getMessage());
}
}
return content;
}
public static String doPostWithJson(String url, String json) {
String returnValue = JsonUtils.write(QCodeResult.fail("接口异常！"));
CloseableHttpClient httpClient = HttpClients.createDefault();
ResponseHandler<String> responseHandler = new BasicResponseHandler();
try {
//第一步：创建HttpClient对象
httpClient = HttpClients.createDefault();
//第二步：创建httpPost对象
HttpPost httpPost = new HttpPost(url);
RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(30000)
.setSocketTimeout(30000).setConnectTimeout(10000).build();
//第三步：给httpPost设置JSON格式的参数
StringEntity requestEntity = new StringEntity(json, "utf-8");
requestEntity.setContentEncoding("UTF-8");
httpPost.setHeader("Content-type", "application/json");
httpPost.setEntity(requestEntity);
httpPost.setConfig(requestConfig);
//第四步：发送HttpPost请求，获取返回值
returnValue = httpClient.execute(httpPost, responseHandler); //调接口获取返回值时，必须用此方法
// System.out.println("请求返回：" + returnValue);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
httpClient.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//第五步：处理返回值
return returnValue;
}
public CloseableHttpClient getHttpClient() {
return HttpClients.createDefault();
}
private void closeHttpClient(CloseableHttpClient client) throws IOException {
if (client != null) {
client.close();
}
}
public static void get(String url) {
HttpGet request = new HttpGet(url);
try {
HttpResponse response = HttpClients.createDefault().execute(request);
if (response.getStatusLine().getStatusCode() == 200) {
EntityUtils.toString(response.getEntity());
}
} catch (Exception e) {
}
}
}