httpclient-4.3.x中get和post方法使用

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
 
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
 
public class HttpClientTest {
 
    /**
     * get方法
     */
    public void httpGet() {  
        CloseableHttpClient httpclient = HttpClients.createDefault(); 
 
        try {  
            // 创建httpget.    
            HttpGet httpget = new HttpGet("http://……");
             
            System.out.println("executing request " + httpget.getURI());  
            // 执行get请求.    
            CloseableHttpResponse response = httpclient.execute(httpget);  
            try {  
                // 获取响应实体    
                HttpEntity entity = response.getEntity(); 
                 
                System.out.println("--------------------------------------");  
                // 打印响应状态    
                System.out.println(response.getStatusLine());  
                if (entity != null) {  
                    // 打印响应内容长度    
                    System.out.println("Response content length: " + entity.getContentLength());  
                    // 打印响应内容    
                    System.out.println("Response content: " + EntityUtils.toString(entity));  
                }  
                System.out.println("------------------------------------");  
            } finally {  
                response.close();  
            }  
        } catch (ClientProtocolException e) {  
            e.printStackTrace();  
        } catch (ParseException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        } finally {  
            // 关闭连接,释放资源    
            try {  
                httpclient.close();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        }  
    }  
     
    /**
     * post方法(表单提交)
     */
    public void httpPostForm() {  
        // 创建默认的httpClient实例.    
        CloseableHttpClient httpclient = HttpClients.createDefault();  
        // 创建httppost    
        HttpPost httppost = new HttpPost("http://…………");
         
        // 创建参数队列    
        List<NameValuePair> formParams = new ArrayList<NameValuePair>();  
        formParams.add(new BasicNameValuePair("username", "admin"));  
        formParams.add(new BasicNameValuePair("password", "123456"));  
        UrlEncodedFormEntity uefEntity;  
        try {  
            uefEntity = new UrlEncodedFormEntity(formParams, "UTF-8");  
            httppost.setEntity(uefEntity);  
            System.out.println("executing request " + httppost.getURI());  
            CloseableHttpResponse response = httpclient.execute(httppost);  
            try {  
                HttpEntity entity = response.getEntity();  
                if (entity != null) {  
                    System.out.println("--------------------------------------");  
                    System.out.println("Response content: " + EntityUtils.toString(entity, "UTF-8"));  
                    System.out.println("--------------------------------------");  
                }  
            } finally {  
                response.close();  
            }  
        } catch (ClientProtocolException e) {  
            e.printStackTrace();  
        } catch (UnsupportedEncodingException e1) {  
            e1.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        } finally {  
            // 关闭连接,释放资源    
            try {  
                httpclient.close();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        }  
    }  
     
}

import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
 
import javax.net.ssl.SSLContext;
 
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
 
 
public class HttpClientUtil {
 
    public static CloseableHttpClient createSSLClientDefault(){
 
        try {
 
            SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
 
                //信任所有
 
                public boolean isTrusted(X509Certificate[] chain,
 
                        String authType) throws CertificateException {
 
                    return true;
 
                }
 
            }).build();
 
            SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext);
 
            return HttpClients.custom().setSSLSocketFactory(sslsf).build();
 
        } catch (KeyManagementException e) {
 
            e.printStackTrace();
 
        } catch (NoSuchAlgorithmException e) {
 
            e.printStackTrace();
 
        } catch (KeyStoreException e) {
 
            e.printStackTrace();
 
        }
 
        return  HttpClients.createDefault();
 
    }
 
}