HttpClient的应用

package com.test;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.util.ArrayList;
import java.util.List;

import javax.net.ssl.SSLContext;

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.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContexts;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
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;
import org.junit.Test;

public class HttpClientTest {

@Test
public void jUnitTest() {
    get();
}

/**
 * HttpClient连接SSL
 */
public void ssl() {
    CloseableHttpClient httpclient = null;
    try {
        KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
        FileInputStream instream = new FileInputStream(new File("d:\\tomcat.keystore"));
        try {
            // 加载keyStore d:\\tomcat.keystore
            trustStore.load(instream, "123456".toCharArray());
        } catch (CertificateException e) {
            e.printStackTrace();
        } finally {
            try {
                instream.close();
            } catch (Exception ignore) {
            }
        }
        // 相信自己的CA和所有自签名的证书
        SSLContext sslcontext = SSLContexts.custom().loadTrustMaterial(trustStore, new TrustSelfSignedStrategy()).build();
        // 只允许使用TLSv1协议
        SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null,
                SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
        httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
        // 创建http请求(get方式)
        HttpGet httpget = new HttpGet("https://localhost:8443/myDemo/Ajax/serivceJ.action");
        System.out.println("executing request" + httpget.getRequestLine());
        CloseableHttpResponse response = httpclient.execute(httpget);
        try {
            HttpEntity entity = response.getEntity();
            System.out.println("----------------------------------------");
            System.out.println(response.getStatusLine());
            if (entity != null) {
                System.out.println("Response content length: " + entity.getContentLength());
                System.out.println(EntityUtils.toString(entity));
                EntityUtils.consume(entity);
            }
        } finally {
            response.close();
        }
    } catch (ParseException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (KeyManagementException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (KeyStoreException e) {
        e.printStackTrace();
    } finally {
        if (httpclient != null) {
            try {
                httpclient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

/**
 * post方式提交表单（模拟用户登录请求）
 */
public void postForm() {
    // 创建默认的httpClient实例.
    CloseableHttpClient httpclient = HttpClients.createDefault();
    // 创建httppost
    HttpPost httppost = new HttpPost("http://localhost:8080/myDemo/Ajax/serivceJ.action");
    // 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();
        }
    }
}

/**
 * 发送 post请求访问本地应用并根据传递参数不同返回不同结果
 */
public void post() {
    // 创建默认的httpClient实例.
    CloseableHttpClient httpclient = HttpClients.createDefault();
    // 创建httppost
    HttpPost httppost = new HttpPost("http://localhost:8080/myDemo/Ajax/serivceJ.action");
    // 创建参数队列
    List<namevaluepair> formparams = new ArrayList<namevaluepair>();
    formparams.add(new BasicNameValuePair("type", "house"));
    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();
        }
    }
}

/**
 * 发送 get请求
 */
public void get() {
    CloseableHttpClient httpclient = HttpClients.createDefault();
    try {
        // 创建httpget.
        HttpGet httpget = new HttpGet("http://www.baidu.com/");
        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();
        }
    }
}

/**
 * 上传文件
 */
public void upload() {
    CloseableHttpClient httpclient = HttpClients.createDefault();
    try {
        HttpPost httppost = new HttpPost("http://localhost:8080/myDemo/Ajax/serivceFile.action");

        FileBody bin = new FileBody(new File("F:\\image\\sendpix0.jpg"));
        StringBody comment = new StringBody("A binary file of some kind", ContentType.TEXT_PLAIN);

        HttpEntity reqEntity = MultipartEntityBuilder.create().addPart("bin", bin).addPart("comment", comment).build();

        httppost.setEntity(reqEntity);

        System.out.println("executing request " + httppost.getRequestLine());
        CloseableHttpResponse response = httpclient.execute(httppost);
        try {
            System.out.println("----------------------------------------");
            System.out.println(response.getStatusLine());
            HttpEntity resEntity = response.getEntity();
            if (resEntity != null) {
                System.out.println("Response content length: " + resEntity.getContentLength());
            }
            EntityUtils.consume(resEntity);
        } finally {
            response.close();
        }
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            httpclient.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

}