通过httpclient的get post方式调用http很常见。一般都是
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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
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<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
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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
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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
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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
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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）
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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
