1. POST request
1.HTTP tool class
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
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.methods.HttpUriRequest;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* HTTP client tool class (supports HTTPS)
*/
public class HttpClientUtils {
\t
/**
* http get request
* @param url
*/
public static String get(String url) {
return get(url, "UTF-8");
}
\t
/**
* http get request
* @param url
*/
public static String get(String url, String charset) {
HttpGet httpGet = new HttpGet(url);
return executeRequest(httpGet, charset);
}
/**
* http get request
* @param url
*/
public static String get(String url, Map<String, String> headerMap) {
return get(url, headerMap, "UTF-8");
}
/**
* http get request
* @param url
*/
public static String get(String url, Map<String, String> headerMap, String charset) {
HttpGet httpGet = new HttpGet(url);
if(headerMap != null) {
for (Map.Entry<String, String> entry : headerMap.entrySet()) {
httpGet.setHeader(entry.getKey(), entry.getValue());
}
}
return executeRequest(httpGet, charset);
}
\t
/**
* HTTP get request, add asynchronous request header parameters
* @param url
*/
public static String ajaxGet(String url) {
return ajaxGet(url, "UTF-8");
}
\t
/**
* HTTP get request, add asynchronous request header parameters
* @param url
*/
public static String ajaxGet(String url, String charset) {
HttpGet httpGet = new HttpGet(url);
httpGet.setHeader("X-Requested-With", "XMLHttpRequest");
return executeRequest(httpGet, charset);
}
/**
* HTTP post request, passing map format parameters
*/
public static String post(String url, Map<String, String> dataMap) {
return post(url, dataMap, "UTF-8");
}
/**
* HTTP post request, passing map format parameters
*/
public static String post(String url, Map<String, String> dataMap, String charset) {
HttpPost httpPost = new HttpPost(url);
try {
if (dataMap != null){
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
for (Map.Entry<String, String> entry : dataMap.entrySet()) {
nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nvps, charset);
formEntity.setContentEncoding(charset);
httpPost.setEntity(formEntity);
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return executeRequest(httpPost, charset);
}
/**
* HTTP post request, passing map format parameters
*/
public static String post(String url, Map<String, String> dataMap, Map<String, String> headerMap) {
return post(url, dataMap, headerMap, "UTF-8");
}
/**
* HTTP post request, passing map format parameters
*/
public static String post(String url, Map<String, String> dataMap, Map<String, String> headerMap, String charset) {
HttpPost httpPost = new HttpPost(url);
try {
if(headerMap != null) {
for (Map.Entry<String, String> entry : headerMap.entrySet()) {
httpPost.setHeader(entry.getKey(), entry.getValue());
}
}
if (dataMap != null){
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
for (Map.Entry<String, String> entry : dataMap.entrySet()) {
nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nvps, charset);
formEntity.setContentEncoding(charset);
httpPost.setEntity(formEntity);
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return executeRequest(httpPost, charset);
}
/**
* http post request, add asynchronous request header parameters and pass map format parameters
*/
public static String ajaxPost(String url, Map<String, String> dataMap) {
return ajaxPost(url, dataMap, "UTF-8");
}
/**
* http post request, add asynchronous request header parameters and pass map format parameters
*/
public static String ajaxPost(String url, Map<String, String> dataMap, String charset) {
HttpPost httpPost = new HttpPost(url);
httpPost.setHeader("X-Requested-With", "XMLHttpRequest");
try {
if (dataMap != null){
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
for (Map.Entry<String, String> entry : dataMap.entrySet()) {
nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nvps, charset);
formEntity.setContentEncoding(charset);
httpPost.setEntity(formEntity);
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return executeRequest(httpPost, charset);
}
/**
* http post request, add asynchronous request header parameters and pass json format parameters
*/
public static String ajaxPostJson(String url, String jsonString) {
return ajaxPostJson(url, jsonString, "UTF-8");
}
/**
* http post request, add asynchronous request header parameters and pass json format parameters
*/
public static String ajaxPostJson(String url, String jsonString, String charset) {
HttpPost httpPost = new HttpPost(url);
httpPost.setHeader("X-Requested-With", "XMLHttpRequest");
// try {
StringEntity stringEntity = new StringEntity(jsonString, charset); // Solve the problem of Chinese garbled characters
stringEntity.setContentEncoding(charset);
stringEntity.setContentType("application/json");
httpPost.setEntity(stringEntity);
// } catch (UnsupportedEncodingException e) {
// e.printStackTrace();
// }
return executeRequest(httpPost, charset);
}
/**
* Execute an http request, passing HttpGet or HttpPost parameters
*/
public static String executeRequest(HttpUriRequest httpRequest) {
return executeRequest(httpRequest, "UTF-8");
}
/**
* Execute an http request, passing HttpGet or HttpPost parameters
*/
public static String executeRequest(HttpUriRequest httpRequest, String charset) {
CloseableHttpClient httpclient;
if ("https".equals(httpRequest.getURI().getScheme())){
httpclient = createSSLInsecureClient();
}else{
httpclient = HttpClients.createDefault();
}
String result = "";
try {
try {
CloseableHttpResponse response = httpclient.execute(httpRequest);
HttpEntity entity = null;
try {
entity = response.getEntity();
result = EntityUtils.toString(entity, charset);
} finally {
EntityUtils.consume(entity);
response.close();
}
} finally {
httpclient.close();
}
}catch(IOException ex){
ex.printStackTrace();
}
return result;
}
\t
/**
* Create SSL connection
*/
public static CloseableHttpClient createSSLInsecureClient() {
try {
SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(new TrustStrategy() {
@Override
public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
return true;
}
}).build();
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
});
return HttpClients.custom().setSSLSocketFactory(sslsf).build();
} catch (GeneralSecurityException ex) {
throw new RuntimeException(ex);
}
}
\t
}
2.POST interface example:
http://IP address:8080/eUrbanMIS/openapi/v2/upstream?actionType=*** & amp;senderCode=*** & amp;data={***}
//The method here is called in specific business
private String accReport(formal parameter) {
//The passed parameters encapsulate the object according to the business
AccReportVO searchMapJsonBean=new AccReportVO();
//Part of the business code is omitted here
String parmStr =JSON.toJSONString(searchMapJsonBean);
Map<String, String> map = new HashMap<>();
map.put("actionType", "***");
map.put("senderCode", "***");
map.put("data", parmStr);
//misUrl is the interface request address, the example here is post request
String res= HttpClientUtils.post(misUrl,map);
log.info("return result" + res);
return res;
}
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