HttpClientUtil 工具
import org.apache.http.*;
import org.apache.http.client.HttpClient;
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.entity.StringEntity;
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.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
/**
* 〈一句话功能简述〉<br>
* 〈HTTP接口工具〉
*
* @author zhoumoxuan
* @create 9/14/18
* @since 1.0.0
*/
public class HttpClientUtil {
public static final Logger logger = LoggerFactory.getLogger(HttpClientUtil.class);
/**
* get请求
*
* @return
*/
public static String doGet(String url) {
try {
HttpClient client = new DefaultHttpClient();
//发送get请求
HttpGet request = new HttpGet(url);
HttpResponse response = client.execute(request);
/**请求发送成功，并得到响应**/
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
/**读取服务器返回过来的json字符串数据**/
String strResult = EntityUtils.toString(response.getEntity());
return strResult;
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* post请求(用于key-value格式的参数)
*
* @param url
* @param params
* @return
*/
public static String doPost(String url, Map params, String charset) {
BufferedReader in = null;
try {
// 定义HttpClient
HttpClient client = new DefaultHttpClient();
// 实例化HTTP方法
HttpPost request = new HttpPost();
request.setURI(new URI(url));
//设置参数
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
for (Iterator iter = params.keySet().iterator(); iter.hasNext(); ) {
String name = (String) iter.next();
String value = String.valueOf(params.get(name));
nvps.add(new BasicNameValuePair(name, value));
//System.out.println(name +"-"+value);
}
request.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
HttpResponse response = client.execute(request);
int code = response.getStatusLine().getStatusCode();
if (code == 200) { //请求成功
in = new BufferedReader(new InputStreamReader(response.getEntity()
.getContent(), charset));
StringBuffer sb = new StringBuffer();
String line = "";
String NL = System.getProperty("line.separator");
while ((line = in.readLine()) != null) {
sb.append(line + NL);
}
in.close();
return sb.toString();
} else { //
System.out.println("状态码：" + code);
return null;
}
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* post请求（用于请求json格式的参数）
*
* @param url
* @param params
* @return
*/
public static String doPost(String url, String params,String charset) throws Exception {
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(url);// 创建httpPost
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-Type", "application/json");
StringEntity entity = new StringEntity(params, charset);
httpPost.setEntity(entity);
CloseableHttpResponse response = null;
try {
response = httpclient.execute(httpPost);
StatusLine status = response.getStatusLine();
int state = status.getStatusCode();
if (state == HttpStatus.SC_OK) {
HttpEntity responseEntity = response.getEntity();
String jsonString = EntityUtils.toString(responseEntity);
return jsonString;
} else {
logger.error("请求返回:" + state + "(" + url + ")");
}
} finally {
if (response != null) {
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
/**
* 带SSL证书的请求
*
* @param url
* @param str
* @param charset
* @return
*/
public String doSslPost(String url, String str, String charset) {
HttpClient httpClient = null;
HttpPost httpPost = null;
String result = null;
try {
httpClient = new SSLClient();
httpPost = new HttpPost(url);
httpPost.setHeader("Content-type", "application/xml; charset=utf-8");
StringEntity entity = new StringEntity(str, "UTF-8");
// 发送Json格式的数据请求
entity.setContentType("application/xml;charset=UTF-8");
entity.setContentEncoding("utf-8");
httpPost.setEntity(entity);
HttpResponse response = httpClient.execute(httpPost);
int status = response.getStatusLine().getStatusCode();
if (status == 200) {
if (response != null) {
HttpEntity resEntity = response.getEntity();
if (resEntity != null) {
result = EntityUtils.toString(resEntity, charset);
}
}
} else {
result = null;
}
} catch (Exception ex) {
ex.printStackTrace();
}
return result;
}
/**
* 带SSL证书但是忽略此证书的请求
*
* @param url
* @param map
* @param charset
* @return
*/
public String doIgnorePost(String url, Map<String, String> map, String charset) {
HttpClient httpClient = null;
HttpPost httpPost = null;
String result = null;
try {
httpClient = new SSLClient();
httpPost = new HttpPost(url);
//设置参数
List<NameValuePair> list = new ArrayList<NameValuePair>();
Iterator iterator = map.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry<String, String> elem = (Map.Entry<String, String>) iterator.next();
list.add(new BasicNameValuePair(elem.getKey(), elem.getValue()));
}
if (list.size() > 0) {
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, charset);
httpPost.setEntity(entity);
}
HttpResponse response = httpClient.execute(httpPost);
if (response != null) {
HttpEntity resEntity = response.getEntity();
if (resEntity != null) {
result = EntityUtils.toString(resEntity, charset);
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
return result;
}
}
