Java利用httpclient通过get、post方式调用https接口的方法
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
<dependency>
<groupid>org.apache.httpcomponents</groupid>
<artifactid>httpclient</artifactid>
<version>4.5.5</version>
</dependency>
<dependency>
<groupid>com.alibaba</groupid>
<artifactid>fastjson</artifactid>
<version>1.2.47</version>
</dependency>
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<namevaluepair> 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);
如果要采用表单提交方式就需要修改成上面所描述的方式。
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原文链接：https://blog.csdn.net/terry711/article/details/112471780
文档来源：服务器之家http://www.zzvips.com/article/181175.html
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