HTTP 访问接口封装，app开发中常用。

HttpKit.java

 

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.Map;
import java.util.Map.Entry;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;

import com.bes.enterprise.console.gson.bean.Attachment;

public class HttpKit {
   
    private static final String DEFAULT_CHARSET = "UTF-8";
    private static final Logger LOGGER = Logger.getLogger(HttpKit.class);

    /**
     * 发送Get请求
     * @param url
     * @return
     * @throws NoSuchProviderException
     * @throws NoSuchAlgorithmException
     * @throws IOException
     * @throws KeyManagementException
     */
    private static String get(String url) throws NoSuchAlgorithmException, NoSuchProviderException, IOException, KeyManagementException {
        StringBuffer bufferRes = null;
        TrustManager[] tm = { new MyX509TrustManager() }; 
        SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE"); 
        sslContext.init(null, tm, new java.security.SecureRandom()); 
        // 从上述SSLContext对象中得到SSLSocketFactory对象 
        SSLSocketFactory ssf = sslContext.getSocketFactory();
       
        URL urlGet = new URL(url);
        HttpsURLConnection http = (HttpsURLConnection) urlGet.openConnection();
        // 连接超时
        http.setConnectTimeout(25000);
        // 读取超时 --服务器响应比较慢，增大时间
        http.setReadTimeout(25000);
        http.setRequestMethod("GET");
        http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
        http.setSSLSocketFactory(ssf);
        http.setDoOutput(true);
        http.setDoInput(true);
        http.connect();
       
        InputStream in = http.getInputStream();
        BufferedReader read = new BufferedReader(new InputStreamReader(in, DEFAULT_CHARSET));
        String valueString = null;
        bufferRes = new StringBuffer();
        while ((valueString = read.readLine()) != null){
            bufferRes.append(valueString);
        }
        in.close();
        if (http != null) {
            // 关闭连接
            http.disconnect();
        }
        return bufferRes.toString();
    }
   
    /**
     * 发送Get请求
     * @param url
     * @return
     * @throws NoSuchProviderException
     * @throws NoSuchAlgorithmException
     * @throws IOException
     * @throws KeyManagementException
     */
    public static String get(String url,Boolean https) throws NoSuchAlgorithmException, NoSuchProviderException, IOException, KeyManagementException {
     if(https != null && https){
      return get(url);
     }else{
      StringBuffer bufferRes = null;
            URL urlGet = new URL(url);
            HttpURLConnection http = (HttpURLConnection) urlGet.openConnection();
            // 连接超时
            http.setConnectTimeout(25000);
            // 读取超时 --服务器响应比较慢，增大时间
            http.setReadTimeout(25000);
            http.setRequestMethod("GET");
            http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
            http.setDoOutput(true);
            http.setDoInput(true);
            http.connect();
           
            InputStream in = http.getInputStream();
            BufferedReader read = new BufferedReader(new InputStreamReader(in, DEFAULT_CHARSET));
            String valueString = null;
            bufferRes = new StringBuffer();
            while ((valueString = read.readLine()) != null){
                bufferRes.append(valueString);
            }
            in.close();
            if (http != null) {
                // 关闭连接
                http.disconnect();
            }
            return bufferRes.toString();
     }
    }

    /**
     *  发送Get请求
     * @param url
     * @param params
     * @return
     * @throws IOException
     * @throws NoSuchProviderException
     * @throws NoSuchAlgorithmException
     * @throws KeyManagementException
     */
    public static String get(String url, Map<String, String> params) throws KeyManagementException, NoSuchAlgorithmException, NoSuchProviderException, IOException {
        return get(initParams(url, params));
    }

    /**
     *  发送Post请求
     * @param url
     * @param params
     * @return
     * @throws IOException
     * @throws NoSuchProviderException
     * @throws NoSuchAlgorithmException
     * @throws KeyManagementException
     */
    public static String post(String url, String params) throws IOException, NoSuchAlgorithmException, NoSuchProviderException, KeyManagementException {
     StringBuffer bufferRes = null;
        TrustManager[] tm = { new MyX509TrustManager() };
        SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
        sslContext.init(null, tm, new java.security.SecureRandom());
        // 从上述SSLContext对象中得到SSLSocketFactory对象 
        SSLSocketFactory ssf = sslContext.getSocketFactory();

        URL urlGet = new URL(url);
        HttpsURLConnection http = (HttpsURLConnection) urlGet.openConnection();
        // 连接超时
        http.setConnectTimeout(25000);
        // 读取超时 --服务器响应比较慢，增大时间
        http.setReadTimeout(25000);
        http.setRequestMethod("POST");
        http.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
        http.setSSLSocketFactory(ssf);
        http.setDoOutput(true);
        http.setDoInput(true);
        http.connect();

        OutputStream out = http.getOutputStream();
        out.write(params.getBytes("UTF-8"));
        out.flush();
        out.close();

        InputStream in = http.getInputStream();
        BufferedReader read = new BufferedReader(new InputStreamReader(in, DEFAULT_CHARSET));
        String valueString = null;
        bufferRes = new StringBuffer();
        while ((valueString = read.readLine()) != null){
            bufferRes.append(valueString);
        }
        in.close();
        if (http != null) {
            // 关闭连接
            http.disconnect();
        }
        return bufferRes.toString();
    }
   
    /**
     * 上传媒体文件
     * @param url
     * @param params
     * @param file
     * @return
     * @throws IOException
     * @throws NoSuchAlgorithmException
     * @throws NoSuchProviderException
     * @throws KeyManagementException
     */
    public static String upload(String url,File file) throws IOException, NoSuchAlgorithmException, NoSuchProviderException, KeyManagementException {
        String BOUNDARY = "----WebKitFormBoundaryiDGnV9zdZA1eM1yL"; // 定义数据分隔线 
        StringBuffer bufferRes = null;
        URL urlGet = new URL(url);
        HttpURLConnection conn = (HttpURLConnection) urlGet.openConnection();
        conn.setDoOutput(true); 
        conn.setDoInput(true); 
        conn.setUseCaches(false); 
        conn.setRequestMethod("POST"); 
        conn.setRequestProperty("connection", "Keep-Alive"); 
        conn.setRequestProperty("user-agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.107 Safari/537.36"); 
        conn.setRequestProperty("Charsert", "UTF-8");  
        conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY); 
         
        OutputStream out = new DataOutputStream(conn.getOutputStream()); 
        byte[] end_data = ("\r\n--" + BOUNDARY + "--\r\n").getBytes();// 定义最后数据分隔线 
        StringBuilder sb = new StringBuilder();   
        sb.append("--");   
        sb.append(BOUNDARY);   
        sb.append("\r\n");   
        sb.append("Content-Disposition: form-data;name=\"media\";filename=\""+ file.getName() + "\"\r\n");   
        sb.append("Content-Type:application/octet-stream\r\n\r\n");   
        byte[] data = sb.toString().getBytes(); 
        out.write(data); 
        DataInputStream fs = new DataInputStream(new FileInputStream(file)); 
        int bytes = 0; 
        byte[] bufferOut = new byte[1024]; 
        while ((bytes = fs.read(bufferOut)) != -1) { 
            out.write(bufferOut, 0, bytes); 
        } 
        out.write("\r\n".getBytes()); //多个文件时，二个文件之间加入这个 
        fs.close(); 
        out.write(end_data); 
        out.flush();   
        out.close();  
         
        // 定义BufferedReader输入流来读取URL的响应 
        InputStream in = conn.getInputStream();
        BufferedReader read = new BufferedReader(new InputStreamReader(in, DEFAULT_CHARSET));
        String valueString = null;
        bufferRes = new StringBuffer();
        while ((valueString = read.readLine()) != null){
            bufferRes.append(valueString);
        }
        in.close();
        if (conn != null) {
            // 关闭连接
         conn.disconnect();
        }
        return bufferRes.toString();
    }
   
    /**
     * 下载资源
     * @param url
     * @return
     * @throws IOException
     */
    public static Attachment download(String url) throws IOException{
     Attachment att = new Attachment();
      URL urlGet = new URL(url);
         HttpURLConnection conn = (HttpURLConnection) urlGet.openConnection();
         conn.setDoOutput(true); 
         conn.setDoInput(true); 
         conn.setUseCaches(false); 
         conn.setRequestMethod("GET"); 
         conn.connect();
         if(conn.getContentType().equalsIgnoreCase("text/plain")){
         // 定义BufferedReader输入流来读取URL的响应 
             InputStream in = conn.getInputStream();
             BufferedReader read = new BufferedReader(new InputStreamReader(in, DEFAULT_CHARSET));
             String valueString = null;
             StringBuffer bufferRes = new StringBuffer();
             while ((valueString = read.readLine()) != null){
                 bufferRes.append(valueString);
             }
             in.close();
             att.setError(bufferRes.toString());
         }else{
          BufferedInputStream bis = new BufferedInputStream(conn.getInputStream()); 
             String ds = conn.getHeaderField("Content-disposition");
             String fullName = ds.substring(ds.indexOf("filename=\"")+10,ds.length()-1);
             String relName = fullName.substring(0, fullName.lastIndexOf("."));
             String suffix = fullName.substring(relName.length()+1);
            
             att.setFullName(fullName);
             att.setFileName(relName);
             att.setSuffix(suffix);
             att.setContentLength(conn.getHeaderField("Content-Length"));
             att.setContentType(conn.getHeaderField("Content-Type"));
            
             att.setFileStream(bis);
         }
         return att;
    }

    /**
     * 构造url
     * @param url
     * @param params
     * @return
     */
    private static String initParams(String url, Map<String, String> params){
        if (null == params || params.isEmpty()) {
            return url;
        }
        StringBuilder sb = new StringBuilder(url);
        if (url.indexOf("?") == -1) {
            sb.append("?");
        } else {
            sb.append("&");
        }
        boolean first = true;
        for (Entry<String, String> entry : params.entrySet()) {
            if (first) {
                first = false;
            } else {
                sb.append("&");
            }
            String key = entry.getKey();
            String value = entry.getValue();
            sb.append(key).append("=");
            if (StringUtils.isNotEmpty(value)) {
                try {
                    sb.append(URLEncoder.encode(value, DEFAULT_CHARSET));
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                    LOGGER.error(url,e);
                }
            }
        }
        return sb.toString();
    }
   
    public static void main(String[] args) {
     String fname = "dsasdas.mp4";
     String s = fname.substring(0, fname.lastIndexOf("."));
     String f = fname.substring(s.length()+1);
  System.out.println(f);
 }
}

/**
 * 证书管理
 */
class MyX509TrustManager implements X509TrustManager {

    public X509Certificate[] getAcceptedIssuers() {
        return null; 
    }

    @Override
    public void checkClientTrusted(X509Certificate[] chain, String authType)
            throws CertificateException {
    }

    @Override
    public void checkServerTrusted(X509Certificate[] chain, String authType)
            throws CertificateException {
    }
}