怎么在Java中利用httpclient调用https接口？针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
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通过httpclient的get post方式调用http很常见。一般都是
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(http://127.0.0.1/login);
但是如果要调用https这个方式就不行了。就要修改DefaultHttpClient
org.apache.httpcomponents
httpclient
4.5.5
com.alibaba
fastjson
1.2.47
先导入包
然后重写DefaultHttpClient的类
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));
}
}这时候就可以使用https方式调用了
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
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.util.EntityUtils;
public class HttpClientUtil {
public static String doGet(String url,String charset) throws Exception{
HttpClient httpClient = null;
HttpGet Httpget = null;
String result = null;
httpClient = new SSLClient();
Httpget = new HttpGet(url);
Httpget.addHeader("Content-Type", "application/json");
HttpGet.setEntity(se);
HttpResponse response = httpClient.execute(Httpget);
if(response != null){
HttpEntity resEntity = response.getEntity();
if(resEntity != null){
result = EntityUtils.toString(resEntity,charset);
}
}
return result;
}
public static String doPost(String url,String json,String charset) throws Exception{
HttpClient httpClient = null;
HttpPost HttpPost = null;
String result = null;
httpClient = new SSLClient();
HttpPost = new HttpPost(url);
HttpPost.addHeader("Content-Type", "application/json");
StringEntity se = new StringEntity(json);
se.setContentType("text/json");
se.setContentEncoding(new BasicHeader("Content-Type", "application/json"));
HttpPost.setEntity(se);
HttpResponse response = httpClient.execute(HttpPost);
if(response != null){
HttpEntity resEntity = response.getEntity();
if(resEntity != null){
result = EntityUtils.toString(resEntity,charset);
}
}
return result;
}
}post调用代码
public static void main(String[] args) throws Exception{
String url = "https://127.0.0.1/getuser";
String json = "{\"id\":1}";
String str = HttpClientUtil.doPost(url, json, "utf-8");
System.out.println(str);
}get调用代码
public static void main(String[] args) throws Exception{
String url = "https://127.0.0.1/getuser?id=1";
String str = HttpClientUtil.doPost(url, "utf-8");
System.out.println(str);
}StringEntity参数说明
se.setContentEncoding(new BasicHeader(“Content-Type”, “application/json”));
使用的是json模式 所以传的格式是json
application/xhtml+xml ：XHTML格式
application/xml ： XML数据格式
application/atom+xml ：Atom XML聚合格式
application/json ： JSON数据格式
application/pdf ：pdf格式
application/msword ： Word文档格式
application/octet-stream ： 二进制流数据（如常见的文件下载）
application/x-www-form-urlencoded ： 中默认的encType，form表单数据被编码为key/value格式发送到服务器（表单默认的提交数据的格式）
HttpPost.addHeader("Content-Type", " application/x-www-form-urlencoded");
List params=new ArrayList<>();
params.add(new BasicNameValuePair("key1","value1"));
params.add(new BasicNameValuePair("key2","value2"));
params.add(new BasicNameValuePair("key3","value3"));
UrlEncodedFormEntity entity=new UrlEncodedFormEntity(params,"UTF-8");
HttpPost.setEntity(entity);关于怎么在Java中利用httpclient调用https接口问题的解答就分享到这里了，希望以上内容可以对大家有一定的帮助，如果你还有很多疑惑没有解开，可以关注创新互联行业资讯频道了解更多相关知识。
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