https工具类设置请求头，使用apache的httpclient实现

发布网友发布时间：2022-04-21 03:03

共1个回答

热心网友时间：2023-11-04 20:52

在项目开发过程中，我想大部分系统都需要对接另外的系统。对接方式有很多种，现在最常见的就是https请求了。现将Java发送https请求的工具类整理一下，有需要用到的同学拿走不谢。

该方法使用apache的httpclient实现

第一步：创建SSLClient

import java.security.cert.CertificateException;

import java.security.cert.X509Certificate;

import javax.net.ssl.SSLContext;

import javax.net.ssl.TrustManager;

import javax.net.ssl.X509TrustManager;

import org.apache.http.conn.ClientConnectionManager;

import org.apache.http.conn.scheme.Scheme;

import org.apache.http.conn.scheme.SchemeRegistry;

import org.apache.http.conn.ssl.SSLSocketFactory;

import org.apache.http.impl.client.DefaultHttpClient;

public class SSLClient extends DefaultHttpClient{

public SSLClient() throws Exception{

super();

SSLContext ctx = SSLContext.getInstance("TLS");

X509TrustManager tm = new X509TrustManager() {

@Override

public void checkClientTrusted(X509Certificate[] chain,

String authType) throws CertificateException {

}

@Override

public void checkServerTrusted(X509Certificate[] chain,

String authType) throws CertificateException {

}

@Override

public X509Certificate[] getAcceptedIssuers() {

return null;

}

};

ctx.init(null, new TrustManager[]{tm}, null);

SSLSocketFactory ssf = new SSLSocketFactory(ctx,SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

ClientConnectionManager ccm = this.getConnectionManager();

SchemeRegistry sr = ccm.getSchemeRegistry();

sr.register(new Scheme("https", 443, ssf));

}

}

第二步：实现自己的https工具类

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.StringEntity;

import org.apache.http.message.BasicHeader;

import org.apache.http.protocol.HTTP;

import org.apache.http.util.EntityUtils;

import java.util.Map;

public class HttpsClientUtil {

private static final String CHAREST = "utf-8";

/**

* 发送post请求

* @param url

* @return

*/

public static String doPost(String url,String mapParam){

HttpClient httpClient = null;

HttpPost httpPost = null;

String result = null;

try{

httpClient = new SSLClient();

httpPost = new HttpPost(url);

//设置参数

httpPost.setHeader("Content-Type", "application/json");

httpPost.addHeader("Authorization", "Basic YWRtaW46");

StringEntity s = new StringEntity(mapParam, CHAREST);

s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,"application/json"));

httpPost.setEntity(s);

HttpResponse response = httpClient.execute(httpPost);

if(response != null){

HttpEntity resEntity = response.getEntity();

if(resEntity != null){

result = EntityUtils.toString(resEntity,CHAREST);

}

}

}catch(Exception ex){

ex.printStackTrace();

}

return result;

}

/**

* 发送get请求

* @param url 链接地址

* @return

*/

public static String doGet(String url){

HttpClient httpClient = null;

HttpGet httpGet= null;

String result = null;

try {

httpClient = new SSLClient();

httpGet = new HttpGet(url);

HttpResponse response = httpClient.execute(httpGet);

if(response != null){

HttpEntity resEntity = response.getEntity();

if(resEntity != null){

result = EntityUtils.toString(resEntity,CHAREST);

}

}

} catch (Exception e) {

e.printStackTrace();

}

return result;

}

/**

* 发送get请求,并设置get的请求头

* @param url 链接地址

* @return

*/

public static String setHeadDoGet(String url,Map headers){

HttpClient httpClient = null;

HttpGet httpGet= null;

String result = null;

try {

httpClient = new SSLClient();

httpGet = new HttpGet(url);

for (Map.Entry e : headers.entrySet()) {

httpGet.addHeader(e.getKey(), e.getValue());

}

HttpResponse response = httpClient.execute(httpGet);

if(response != null){

HttpEntity resEntity = response.getEntity();

if(resEntity != null){

result = EntityUtils.toString(resEntity,CHAREST);

}

}

} catch (Exception e) {

e.printStackTrace();

}

return result;

}

}

ps:有需要设置post请求头的请求，同学们可以参考setHeadDoGet方法进行编写。需要用到的apache的httpclient-4.5.9.jar包。