公司没网，所有要请求接口需要设置代理。
doGet postJson 和 不进行代理请求的postJsonNotProxy
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.ParseException;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.CredentialsProvider;
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.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
* 封装了一些采用 HttpClient发送HTTP请求的方法
*/
public class HttpClientUtils {
/**
* 连接超时时间
*/
private static int CONNECT_TIME_OUT = 15 * 1000;
/**
* 读取超时时间
*/
private static int READ_TIME_OUT = 30 * 1000;//40秒
private HttpClientUtils() {
}
public static String doGet(String url) {
CloseableHttpClient httpClient = null;
CloseableHttpResponse response = null;
String result = "";
try {
HttpHost proxy = new HttpHost("代理网址", 8080, "http");
CredentialsProvider provider = new BasicCredentialsProvider();
provider.setCredentials(new AuthScope(proxy), new UsernamePasswordCredentials("账号", "密码"));
httpClient = HttpClients.custom().setDefaultCredentialsProvider(provider).build();
// 创建httpGet远程连接实例
HttpGet httpGet = new HttpGet(url);
// 设置请求头信息，鉴权
// httpGet.setHeader("Authorization", "Bearer da3efcbf-0845-4fe3-8aba-ee040be542c0");
// 设置配置请求参数
RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(35000)// 连接主机服务超时时间
.setConnectionRequestTimeout(35000)// 请求超时时间
.setSocketTimeout(60000)// 数据读取超时时间
.setProxy(proxy)
.build();
// 为httpGet实例设置配置
httpGet.setConfig(requestConfig);
// 执行get请求得到返回对象
response = httpClient.execute(httpGet);
// 通过返回对象获取返回数据
HttpEntity entity = response.getEntity();
// 通过EntityUtils中的toString方法将结果转换为字符串
result = EntityUtils.toString(entity);
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
// 关闭资源
if (null != response) {
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (null != httpClient) {
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return result;
}
/**
* 发送post 请求（json格式）
*
* @param reqURL
* @param jsonDataStr
* @return result
*/
public static String postJson(String reqURL, String jsonDataStr) {
CloseableHttpClient httpClient = null;
HttpPost httpPost = null;
String responseResult = null;
CloseableHttpResponse response = null;
try {
HttpHost proxy = new HttpHost("代理网址", 8080, "http");
CredentialsProvider provider = new BasicCredentialsProvider();
provider.setCredentials(new AuthScope(proxy), new UsernamePasswordCredentials("账号", "密码"));
httpClient = HttpClients.custom().setDefaultCredentialsProvider(provider).build();
httpPost = new HttpPost(reqURL);
RequestConfig requestConfig = RequestConfig.custom()//
.setConnectTimeout(CONNECT_TIME_OUT)// 连接一个url的连接等待时间
.setConnectionRequestTimeout(CONNECT_TIME_OUT)//
.setSocketTimeout(READ_TIME_OUT)// 读取数据超时
.setProxy(proxy)
.build();
httpPost.setConfig(requestConfig);
httpPost.setHeader(HTTP.CONTENT_TYPE, "application/json");
StringEntity entity = new StringEntity(jsonDataStr, "UTF-8");
entity.setContentEncoding(new BasicHeader(HTTP.CONTENT_ENCODING, "UTF-8"));
entity.setContentType("application/json");
httpPost.setEntity(entity);
response = httpClient.execute(httpPost);
HttpEntity httpEntity = response.getEntity();
if (httpEntity != null) {
responseResult = EntityUtils.toString(httpEntity, "UTF-8");
EntityUtils.consume(httpEntity);
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
closeHttp(response, httpClient);
}
return responseResult;
}
public static String postJsonNotProxy(String reqURL, String jsonDataStr, String token) {
CloseableHttpClient httpClient = null;
HttpPost httpPost = null;
String responseResult = null;
CloseableHttpResponse response = null;
try {
httpClient = HttpClients.custom().build();
httpPost = new HttpPost(reqURL);
RequestConfig requestConfig = RequestConfig.custom()//
.setConnectTimeout(CONNECT_TIME_OUT)// 连接一个url的连接等待时间
.setConnectionRequestTimeout(CONNECT_TIME_OUT)//
.setSocketTimeout(READ_TIME_OUT)// 读取数据超时
.build();
httpPost.setConfig(requestConfig);
httpPost.setHeader(HTTP.CONTENT_TYPE, "application/json");
httpPost.setHeader("Authorization", token);
StringEntity entity = new StringEntity(jsonDataStr, "UTF-8");
entity.setContentEncoding(new BasicHeader(HTTP.CONTENT_ENCODING, "UTF-8"));
entity.setContentType("application/json");
httpPost.setEntity(entity);
response = httpClient.execute(httpPost);
HttpEntity httpEntity = response.getEntity();
if (httpEntity != null) {
responseResult = EntityUtils.toString(httpEntity, "UTF-8");
EntityUtils.consume(httpEntity);
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
closeHttp(response, httpClient);
}
return responseResult;
}
public static String doPostForm(String httpUrl, Map param) {
HttpURLConnection connection = null;
InputStream is = null;
OutputStream os = null;
BufferedReader br = null;
String result = null;
try {
URL url = new URL(httpUrl);
// 通过远程url连接对象打开连接
connection = (HttpURLConnection) url.openConnection();
// 设置连接请求方式
connection.setRequestMethod("POST");
// 设置连接主机服务器超时时间：15000毫秒
connection.setConnectTimeout(15000);
// 设置读取主机服务器返回数据超时时间：60000毫秒
connection.setReadTimeout(60000);
// 默认值为：false，当向远程服务器传送数据/写数据时，需要设置为true
connection.setDoOutput(true);
// 默认值为：true，当前向远程服务读取数据时，设置为true，该参数可有可无
connection.setDoInput(true);
// 设置传入参数的格式:请求参数应该是 name1=value1&name2=value2 的形式。
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
// 设置鉴权信息：Authorization: Bearer da3efcbf-0845-4fe3-8aba-ee040be542c0
//connection.setRequestProperty("Authorization", "Bearer da3efcbf-0845-4fe3-8aba-ee040be542c0");
// 通过连接对象获取一个输出流
os = connection.getOutputStream();
// 通过输出流对象将参数写出去/传输出去,它是通过字节数组写出的(form表单形式的参数实质也是key,value值的拼接，类似于get请求参数的拼接)
os.write(createLinkString(param).getBytes());
// 通过连接对象获取一个输入流，向远程读取
if (connection.getResponseCode() == 200) {
is = connection.getInputStream();
// 对输入流对象进行包装:charset根据工作项目组的要求来设置
br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
StringBuffer sbf = new StringBuffer();
String temp = null;
// 循环遍历一行一行读取数据
while ((temp = br.readLine()) != null) {
sbf.append(temp);
sbf.append("\r\n");
}
result = sbf.toString();
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
// 关闭资源
if (null != br) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (null != os) {
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (null != is) {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
// 断开与远程地址url的连接
connection.disconnect();
}
return result;
}
public static String createLinkString(Map<String, String> params) {
List<String> keys = new ArrayList<String>(params.keySet());
Collections.sort(keys);
StringBuilder prestr = new StringBuilder();
for (int i = 0; i < keys.size(); i++) {
String key = keys.get(i);
String value = params.get(key);
if (i == keys.size() - 1) {// 拼接时，不包括最后一个&字符
prestr.append(key).append("=").append(value);
} else {
prestr.append(key).append("=").append(value).append("&");
}
}
return prestr.toString();
}
private static void closeHttp(CloseableHttpResponse response, CloseableHttpClient httpClient) {
try {
if (response != null) {
response.close();
}
} catch (IOException e) {
e.printStackTrace();
}
try {
if (httpClient != null) {
httpClient.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}