java https post get请求_JAVA利用HttpClient进行POST和GET请求（HTTPS）

目前，要为另一个项目提供接口，接口是用HTTP URL实现的，最初的想法是另一个项目用JQuery post进行请求。

java获取post参数、但是，很可能另一个项目是部署在别的机器上，那么就存在跨域问题，而JQuery的post请求是不允许跨域的。

这时，就只能够用HttpClient包进行请求了，同时由于请求的URL是HTTPS的，为了避免需要证书，所以用一个类继承DefaultHttpClient类，忽略校验过程。

1.写一个SSLClient类，继承至HttpClient

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;

//用于进行Https请求的HttpClient

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));

}

}

2.写一个利用HttpClient发送post请求的类

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Map.Entry;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

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

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.util.EntityUtils;

/*

* 利用HttpClient进行post请求的工具类

*/

public class HttpClientUtil {

public String doPost(String url,Map map,String charset){

HttpClient httpClient = null;

HttpPost httpPost = null;

String result = null;

try{

httpClient = new SSLClient();

httpPost = new HttpPost(url);

//设置参数

List list = new ArrayList();

Iterator iterator = map.entrySet().iterator();

while(iterator.hasNext()){

Entry elem = (Entry) iterator.next();

list.add(new BasicNameValuePair(elem.getKey(),elem.getValue()));

}

if(list.size() > 0){

UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list,charset);

httpPost.setEntity(entity);

}

HttpResponse response = httpClient.execute(httpPost);

if(response != null){

HttpEntity resEntity = response.getEntity();

if(resEntity != null){

result = EntityUtils.toString(resEntity,charset);

}

}

}catch(Exception ex){

ex.printStackTrace();

}

return result;

}

}

3.调用post请求的测试代码

import java.util.HashMap;

import java.util.Map;

//对接口进行测试

public class TestMain {

private String url = "https://192.168.1.101/";

private String charset = "utf-8";

private HttpClientUtil httpClientUtil = null;

public TestMain(){

httpClientUtil = new HttpClientUtil();

}

public void test(){

String httpOrgCreateTest = url + "httpOrg/create";

Map createMap = new HashMap();

createMap.put("authuser","*****");

createMap.put("authpass","*****");

createMap.put("orgkey","****");

createMap.put("orgname","****");

String httpOrgCreateTestRtn = httpClientUtil.doPost(httpOrgCreateTest,createMap,charset);

System.out.println("result:"+httpOrgCreateTestRtn);

}

public static void main(String[] args){

TestMain main = new TestMain();

main.test();

}

}

4.GET的请求方式

/**

* 发送get请求

* @param url 链接地址

* @param charset 字符编码，若为null则默认utf-8

* @return

*/

public String doGet(String url,String charset){

if(null == charset){

charset = "utf-8";

}

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,charset);

}

}

} catch (Exception e) {

e.printStackTrace();

}

return result;

}

httpClient4.2的jar包下载路径：http://download.csdn.net/detail/hqmryang/4582440#comment