1.测试：
package myHttpClient;
/**
* Hello world!
*
*/
public class myApp {
public static void main(String[] args) throws Exception {
String reString = HttpClientUtils.doGet("https://www.baidu.com/").getContent();
System.out.print(reString);
}
}
2.工具类：
package myHttpClient;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
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.HttpDelete;
import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
/**
* httpClient工具类
*/
public class HttpClientUtils {
// 编码格式。发送编码格式统一用UTF-8
private static final String ENCODING = "UTF-8";
// 设置连接超时时间，单位毫秒。
private static final int CONNECT_TIMEOUT = 5000;
// 请求获取数据的超时时间(即响应时间)，单位毫秒。
private static final int SOCKET_TIMEOUT = 5000;
private static HttpClientResult httpClientResult;
/**
* 发送get请求；不带请求头和请求参数
*
* @param url 请求地址
* @return
* @throws Exception
*/
public static HttpClientResult doGet(String url) throws Exception {
return doGet(url, null, null);
}
/**
* 发送get请求；带请求参数
*
* @param url 请求地址
* @param params 请求参数集合
* @return
* @throws Exception
*/
public static HttpClientResult doGet(String url, Map<String, String> params) throws Exception {
return doGet(url, null, params);
}
/**
* 发送get请求；带请求头和请求参数
*
* @param url 请求地址
* @param headers 请求头集合
* @param params 请求参数集合
* @return
* @throws Exception
*/
public static HttpClientResult doGet(String url, Map<String, String> headers, Map<String, String> params) throws Exception {
// 创建httpClient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
// 创建访问的地址
URIBuilder uriBuilder = new URIBuilder(url);
if (params != null) {
Set<Entry<String, String>> entrySet = params.entrySet();
for (Entry<String, String> entry : entrySet) {
uriBuilder.setParameter(entry.getKey(), entry.getValue());
}
}
// 创建http对象
HttpGet httpGet = new HttpGet(uriBuilder.build());
/**
* setConnectTimeout：设置连接超时时间，单位毫秒。
* setConnectionRequestTimeout：设置从connect Manager(连接池)获取Connection
* 超时时间，单位毫秒。这个属性是新加的属性，因为目前版本是可以共享连接池的。
* setSocketTimeout：请求获取数据的超时时间(即响应时间)，单位毫秒。 如果访问一个接口，多少时间内无法返回数据，就直接放弃此次调用。
*/
RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
httpGet.setConfig(requestConfig);
// 设置请求头
packageHeader(headers, httpGet);
// 创建httpResponse对象
CloseableHttpResponse httpResponse = null;
try {
// 执行请求并获得响应结果
return getHttpClientResult(httpResponse, httpClient, httpGet);
} finally {
// 释放资源
release(httpResponse, httpClient);
}
}
/**
* 发送post请求；不带请求头和请求参数
*
* @param url 请求地址
* @return
* @throws Exception
*/
public static HttpClientResult doPost(String url) throws Exception {
return doPost(url, null, null);
}
/**
* 发送post请求；带请求参数
*
* @param url 请求地址
* @param params 参数集合
* @return
* @throws Exception
*/
public static HttpClientResult doPost(String url, Map<String, String> params) throws Exception {
return doPost(url, null, params);
}
/**
* 发送post请求；带请求头和请求参数
*
* @param url 请求地址
* @param headers 请求头集合
* @param params 请求参数集合
* @return
* @throws Exception
*/
public static HttpClientResult doPost(String url, Map<String, String> headers, Map<String, String> params) throws Exception {
// 创建httpClient对象
CloseableHttpClient httpClient = HttpClients.createDefault();
// 创建http对象
HttpPost httpPost = new HttpPost(url);
/**
* setConnectTimeout：设置连接超时时间，单位毫秒。
* setConnectionRequestTimeout：设置从connect Manager(连接池)获取Connection
* 超时时间，单位毫秒。这个属性是新加的属性，因为目前版本是可以共享连接池的。
* setSocketTimeout：请求获取数据的超时时间(即响应时间)，单位毫秒。 如果访问一个接口，多少时间内无法返回数据，就直接放弃此次调用。
*/
RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
httpPost.setConfig(requestConfig);
// 设置请求头
/*httpPost.setHeader("Cookie", "");
httpPost.setHeader("Connection", "keep-alive");
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Accept-Language", "zh-CN,zh;q=0.9");
httpPost.setHeader("Accept-Encoding", "gzip, deflate, br");
httpPost.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36");*/
packageHeader(headers, httpPost);
// 封装请求参数
packageParam(params, httpPost);
// 创建httpResponse对象
CloseableHttpResponse httpResponse = null;
try {
// 执行请求并获得响应结果
return getHttpClientResult(httpResponse, httpClient, httpPost);
} finally {
// 释放资源
release(httpResponse, httpClient);
}
}
/**
* 发送put请求；不带请求参数
*
* @param url 请求地址
* @param params 参数集合
* @return
* @throws Exception
*/
public static HttpClientResult doPut(String url) throws Exception {
return doPut(url);
}
/**
* 发送put请求；带请求参数
*
* @param url 请求地址
* @param params 参数集合
* @return
* @throws Exception
*/
public static HttpClientResult doPut(String url, Map<String, String> params) throws Exception {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpPut httpPut = new HttpPut(url);
RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
httpPut.setConfig(requestConfig);
packageParam(params, httpPut);
CloseableHttpResponse httpResponse = null;
try {
return getHttpClientResult(httpResponse, httpClient, httpPut);
} finally {
release(httpResponse, httpClient);
}
}
/**
* 发送delete请求；不带请求参数
*
* @param url 请求地址
* @param params 参数集合
* @return
* @throws Exception
*/
public static HttpClientResult doDelete(String url) throws Exception {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpDelete httpDelete = new HttpDelete(url);
RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
httpDelete.setConfig(requestConfig);
CloseableHttpResponse httpResponse = null;
try {
return getHttpClientResult(httpResponse, httpClient, httpDelete);
} finally {
release(httpResponse, httpClient);
}
}
/**
* 发送delete请求；带请求参数
*
* @param url 请求地址
* @param params 参数集合
* @return
* @throws Exception
*/
public static HttpClientResult doDelete(String url, Map<String, String> params) throws Exception {
if (params == null) {
params = new HashMap<String, String>();
}
params.put("_method", "delete");
return doPost(url, params);
}
/**
* Description: 封装请求头
* @param params
* @param httpMethod
*/
public static void packageHeader(Map<String, String> params, HttpRequestBase httpMethod) {
// 封装请求头
if (params != null) {
Set<Entry<String, String>> entrySet = params.entrySet();
for (Entry<String, String> entry : entrySet) {
// 设置到请求头到HttpRequestBase对象中
httpMethod.setHeader(entry.getKey(), entry.getValue());
}
}
}
/**
* Description: 封装请求参数
*
* @param params
* @param httpMethod
* @throws UnsupportedEncodingException
*/
public static void packageParam(Map<String, String> params, HttpEntityEnclosingRequestBase httpMethod)
throws UnsupportedEncodingException {
// 封装请求参数
if (params != null) {
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
Set<Entry<String, String>> entrySet = params.entrySet();
for (Entry<String, String> entry : entrySet) {
nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
// 设置到请求的http对象中
httpMethod.setEntity(new UrlEncodedFormEntity(nvps, ENCODING));
}
}
/**
* Description: 获得响应结果
*
* @param httpResponse
* @param httpClient
* @param httpMethod
* @return
* @throws Exception
*/
public static HttpClientResult getHttpClientResult(CloseableHttpResponse httpResponse,
CloseableHttpClient httpClient, HttpRequestBase httpMethod) throws Exception {
if (httpClientResult == null) {
httpClientResult = new HttpClientResult();
}
// 执行请求
httpResponse = httpClient.execute(httpMethod);
// 获取返回结果
if (httpResponse != null && httpResponse.getStatusLine() != null) {
String content = "";
if (httpResponse.getEntity() != null) {
content = EntityUtils.toString(httpResponse.getEntity(), ENCODING);
}
httpClientResult.setCode(200);
httpClientResult.setContent(content);
return httpClientResult;
}
return new HttpClientResult();
}
/**
* Description: 释放资源
*
* @param httpResponse
* @param httpClient
* @throws IOException
*/
public static void release(CloseableHttpResponse httpResponse, CloseableHttpClient httpClient) throws IOException {
// 释放资源
if (httpResponse != null) {
httpResponse.close();
}
if (httpClient != null) {
httpClient.close();
}
}
}
3.响应结果：
package myHttpClient;
import java.io.Serializable;
/**
* Description: 封装httpClient响应结果
*
*/
public class HttpClientResult implements Serializable {
/**
* 响应状态码
*/
private int code;
/**
* 响应数据
*/
private String content;
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
}
其他示例：
package com.resafety.hefioc.util;
import org.apache.http.HttpEntity;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
public class PortUtil {
private RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(15000).setConnectTimeout(15000)
.setConnectionRequestTimeout(15000).build();
public String sendHttpGet(String httpUrl,String clientId,String loginCode,String loginPassword) {
HttpGet httpGet = new HttpGet(httpUrl);
return sendHttpGet(httpGet,clientId,loginCode,loginPassword);
}
public String sendHttpGet(HttpGet httpGet,String clientId,String loginCode,String loginPassword) {
CloseableHttpClient httpClient = null;
CloseableHttpResponse response = null;
HttpEntity entity = null;
String responseContent = null;
try {
// 创建默认的httpClient实例
httpClient = HttpClients.createDefault();
httpGet.setConfig(requestConfig);
httpGet.addHeader("ClientId", clientId);
httpGet.addHeader("LoginCode", loginCode);
httpGet.addHeader("LoginPassword", loginPassword);
// 执行请求
response = httpClient.execute(httpGet);
entity = response.getEntity();
responseContent = EntityUtils.toString(entity, "UTF-8");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (response != null) {
response.close();
}
if (httpClient != null) {
httpClient.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return responseContent;
}
}
