网络请求应该是HttpUtil 工具类
来源：互联网 发布：卡尔曼滤波原理和算法 编辑：程序博客网 时间：2024/05/29 08:02
import java.io.IOException;import java.io.InputStream;import java.io.StringReader;import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.zip.GZIPInputStream;import org.apache.http.Header;import org.apache.http.HeaderElement;import org.apache.http.HttpEntity;import org.apache.http.HttpException;import org.apache.http.HttpRequest;import org.apache.http.HttpRequestInterceptor;import org.apache.http.HttpResponse;import org.apache.http.HttpResponseInterceptor;import org.apache.http.HttpVersion;import org.apache.http.NameValuePair;import org.apache.http.client.HttpClient;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.conn.ClientConnectionManager;import org.apache.http.conn.params.ConnManagerParams;import org.apache.http.conn.scheme.PlainSocketFactory;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.entity.HttpEntityWrapper;import org.apache.http.entity.StringEntity;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;import org.apache.http.message.BasicNameValuePair;import org.apache.http.params.BasicHttpParams;import org.apache.http.params.HttpConnectionParams;import org.apache.http.params.HttpParams;import org.apache.http.params.HttpProtocolParams;import org.apache.http.protocol.HTTP;import org.apache.http.protocol.HttpContext;import org.apache.http.util.EntityUtils;import android.content.Context;import android.database.Cursor;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.net.Uri;import android.text.TextUtils;import android.util.Log;public class HttpUtil {private static final int TIMEOUT = 10000;private static final int TIMEOUT_SOCKET = 15000;public static final String CTWAP = "ctwap";public static final String CMWAP = "cmwap";public static final String WAP_3G = "3gwap";public static final String UNIWAP = "uniwap";/** @Fields TYPE_NET_WORK_DISABLED : 网络不可用 */public static final int TYPE_NET_WORK_DISABLED = 0;/** @Fields TYPE_CM_CU_WAP : 移动联通wap10.0.0.172 */public static final int TYPE_CM_CU_WAP = 4;/** @Fields TYPE_CT_WAP : 电信wap 10.0.0.200 */public static final int TYPE_CT_WAP = 5;/** @Fields TYPE_OTHER_NET : 电信,移动,联通,wifi 等net网络 */public static final int TYPE_OTHER_NET = 6;public static Uri PREFERRED_APN_URI = Uri.parse("content://telephony/carriers/preferapn"); private static HashMap<String, HttpClient> sessionMap = new HashMap<String, HttpClient>(); public HttpUtil() { } /* * 将形如“\u7cfb\u7edf\u7e41\u5fd9\uff0c\u8bf7\u7a0d\u540e\u518d\u8bd5\u3002”的字符串解码 * */public static String decode(String s) {StringReader s1 = new StringReader(s);try {char[] chars = new char[s.length()];s1.read(chars);return new String(chars);} catch (Exception ex) {}return null;} /** * get httpGet * * @param url String * @param name String 连接名称，用以维护session,不需要维持连接时请置null，操作结束后请调用destroy方法 * @param charset String * @return String */ public static String get(String url, String name, String charset) { if (charset == null) charset = HTTP.UTF_8; try { HttpClient httpclient; if (name == null) { //不需要维持连接 httpclient = createHttpClient(); } else if (sessionMap.containsKey(name)) { httpclient = sessionMap.get(name); } else { httpclient = createHttpClient(); sessionMap.put(name, httpclient); } HttpGet httpget1 = new HttpGet(url); HttpEntity entity1;// synchronized(httpclient){ HttpResponse response1 = httpclient.execute(httpget1); entity1 = response1.getEntity();// } return EntityUtils.toString(entity1, charset); } catch (Exception e) { e.printStackTrace(); } return null; } /** * post * * @param url String * @param map HashMap 提交表单的键值对 * @param name String 连接名称，用以维护session * @param charset String * @return String */ public static String post(String url, HashMap<String, String> map, String name, String charset) { if (charset == null) charset = HTTP.UTF_8; try { HttpClient httpclient; if (name == null) { //不需要维持连接 httpclient = createHttpClient(); } else if (sessionMap.containsKey(name)) { httpclient = sessionMap.get(name); } else { httpclient = createHttpClient(); sessionMap.put(name, httpclient); } HttpPost httpost = new HttpPost(url); List<NameValuePair> nvps = new ArrayList<NameValuePair>(); if (map != null) { Iterator it = map.keySet().iterator(); while (it.hasNext()) { String key = (String) it.next(); nvps.add(new BasicNameValuePair(key, map.get(key))); } } httpost.setEntity(new UrlEncodedFormEntity(nvps, charset));// System.out.println("!!!!!!!!!!!!!!!");// long s=System.currentTimeMillis(); String requstStr;// synchronized(httpclient){ HttpResponse response = httpclient.execute(httpost);// System.out.println((System.currentTimeMillis()-s)/1000); HttpEntity entity1 = response.getEntity(); requstStr = EntityUtils.toString(entity1, charset); entity1.consumeContent();// } return requstStr; } catch (Exception e) { e.printStackTrace(); } return null; } public static String post(String url, String content, String name, String charset) { if (charset == null) charset = HTTP.UTF_8; try { HttpClient httpclient; if (name == null) { //不需要维持连接 httpclient = createHttpClient(); } else if (sessionMap.containsKey(name)) { httpclient = sessionMap.get(name); } else { httpclient = createHttpClient(); sessionMap.put(name, httpclient); } HttpPost httpost = new HttpPost(url); if (content != null) { httpost.setEntity(new StringEntity(content,charset)); } String requstStr;// synchronized(httpclient){ HttpResponse response = httpclient.execute(httpost); HttpEntity entity1 = response.getEntity(); requstStr = EntityUtils.toString(entity1, charset); entity1.consumeContent();// } return requstStr; } catch (Exception e) { e.printStackTrace(); } return null; } public static void destroy(String name) { HttpClient httpclient = sessionMap.get(name); httpclient.getConnectionManager().shutdown(); sessionMap.remove(name); }/* private static HttpClient createHttpClient() { DefaultHttpClient httpclient = new DefaultHttpClient(); System.getProperties().setProperty("httpclient.useragent", "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; CIBA; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)"); try { httpclient.addRequestInterceptor(new HttpRequestInterceptor() { public void process( final HttpRequest request, final HttpContext context) throws HttpException, IOException { if (!request.containsHeader("Accept-Encoding")) { request.addHeader("Accept-Encoding", "gzip"); } } }); httpclient.getParams().setIntParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,30000); httpclient.getParams().setIntParameter(CoreConnectionPNames.SO_TIMEOUT,60000); httpclient.addResponseInterceptor(new HttpResponseInterceptor() { public void process( final HttpResponse response, final HttpContext context) throws HttpException, IOException { HttpEntity entity = response.getEntity(); Header ceheader = entity.getContentEncoding(); if (ceheader != null) { HeaderElement[] codecs = ceheader.getElements(); for (int i = 0; i < codecs.length; i++) { if (codecs[i].getName().equalsIgnoreCase("gzip")) { response.setEntity( new GzipDecompressingEntity(response. getEntity())); return; } } } } }); } catch (Exception e) { e.printStackTrace(); } return httpclient; }*/ public static synchronized HttpClient createHttpClient() {HttpParams params = new BasicHttpParams();HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);HttpProtocolParams.setContentCharset(params,HTTP.DEFAULT_CONTENT_CHARSET);HttpProtocolParams.setUseExpectContinue(params, true);HttpProtocolParams.setUserAgent(params,"Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; CIBA; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)");ConnManagerParams.setTimeout(params, 5000);HttpConnectionParams.setConnectionTimeout(params, TIMEOUT);HttpConnectionParams.setSoTimeout(params, TIMEOUT_SOCKET);SchemeRegistry schReg = new SchemeRegistry();schReg.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));schReg.register(new Scheme("https",SSLSocketFactory.getSocketFactory(), 443));ClientConnectionManager conMgr = new ThreadSafeClientConnManager(params, schReg);DefaultHttpClient customHttpClient = new DefaultHttpClient(conMgr,params);customHttpClient.addRequestInterceptor(new HttpRequestInterceptor() { public void process( final HttpRequest request, final HttpContext context) throws HttpException, IOException { if (!request.containsHeader("Accept-Encoding")) { request.addHeader("Accept-Encoding", "gzip"); } } }); customHttpClient.addResponseInterceptor(new HttpResponseInterceptor() { public void process( final HttpResponse response, final HttpContext context) throws HttpException, IOException { HttpEntity entity = response.getEntity(); Header ceheader = entity.getContentEncoding(); if (ceheader != null) { HeaderElement[] codecs = ceheader.getElements(); for (int i = 0; i < codecs.length; i++) { if (codecs[i].getName().equalsIgnoreCase("gzip")) { response.setEntity( new GzipDecompressingEntity(response. getEntity())); return; } } } } });DefaultHttpRequestRetryHandler retryHandler = new DefaultHttpRequestRetryHandler(3, true); customHttpClient.setHttpRequestRetryHandler(retryHandler);/*switch (checkNetworkType(EdjApp.getInstance())) {case TYPE_CT_WAP: {// 通过代理解决中国移动联通GPRS中wap无法访问的问题HttpHost proxy = new HttpHost("10.0.0.200", 80, "http");customHttpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY,proxy);Log.v("tag","当前网络类型为cm_cu_wap,设置代理10.0.0.200访问www");}break;case TYPE_CM_CU_WAP: {// 通过代理解决中国移动联通GPRS中wap无法访问的问题HttpHost proxy = new HttpHost("10.0.0.172", 80, "http");customHttpClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY,proxy);Log.v("tag","当前网络类型为cm_cu_wap,设置代理10.0.0.172访问www");}break;}*/return customHttpClient;} static class GzipDecompressingEntity extends HttpEntityWrapper { public GzipDecompressingEntity(final HttpEntity entity) { super(entity); } @Override public InputStream getContent() throws IOException, IllegalStateException { // the wrapped entity's getContent() decides about repeatability InputStream wrappedin = wrappedEntity.getContent(); return new GZIPInputStream(wrappedin); } @Override public long getContentLength() { // length of ungzipped content is not known return -1; } } /*** * 判断Network具体类型（联通移动wap，电信wap，其他net） * * */public static int checkNetworkType(Context mContext) {try {final ConnectivityManager connectivityManager = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);final NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();if (networkInfo == null || !networkInfo.isAvailable()) {// 注意一：// NetworkInfo 为空或者不可以用的时候正常情况应该是当前没有可用网络，// 但是有些电信机器，仍可以正常联网，// 所以当成net网络处理依然尝试连接网络。// （然后在socket中捕捉异常，进行二次判断与用户提示）。Log.i("", "=====================>无网络");return TYPE_NET_WORK_DISABLED;} else {// NetworkInfo不为null开始判断是网络类型int netType = networkInfo.getType();if (netType == ConnectivityManager.TYPE_WIFI) {// wifi net处理Log.i("", "=====================>wifi网络");return TYPE_OTHER_NET;} else if (netType == ConnectivityManager.TYPE_MOBILE) {// 注意二：// 判断是否电信wap:// 不要通过getExtraInfo获取接入点名称来判断类型，// 因为通过目前电信多种机型测试发现接入点名称大都为#777或者null，// 电信机器wap接入点中要比移动联通wap接入点多设置一个用户名和密码,// 所以可以通过这个进行判断！final Cursor c = mContext.getContentResolver().query(PREFERRED_APN_URI, null, null, null, null);if (c != null) {c.moveToFirst();final String user = c.getString(c.getColumnIndex("user"));if (!TextUtils.isEmpty(user)) {Log.i("","=====================>代理："+ c.getString(c.getColumnIndex("proxy")));if (user.startsWith(CTWAP)) {Log.i("", "=====================>电信wap网络");return TYPE_CT_WAP;}}}c.close();// 注意三：// 判断是移动联通wap:// 其实还有一种方法通过getString(c.getColumnIndex("proxy")获取代理ip// 来判断接入点，10.0.0.172就是移动联通wap，10.0.0.200就是电信wap，但在// 实际开发中并不是所有机器都能获取到接入点代理信息，例如魅族M9 （2.2）等...// 所以采用getExtraInfo获取接入点名字进行判断String netMode = networkInfo.getExtraInfo();Log.i("", "netMode ================== " + netMode);if (netMode != null) {// 通过apn名称判断是否是联通和移动wapnetMode = netMode.toLowerCase();if (netMode.equals(CMWAP) || netMode.equals(WAP_3G)|| netMode.equals(UNIWAP)) {Log.i("", "=====================>移动联通wap网络");return TYPE_CM_CU_WAP;}}}}} catch (Exception ex) {ex.printStackTrace();return TYPE_OTHER_NET;}return TYPE_OTHER_NET;} }
二、android-async-http
具体的使用方法在上面blog的下载中有例子，而我要说的也就是一些特殊处理。
客户端在处理文件提交时需要考虑服务器的接收方式，现在大多的服务器由Java的三大框架构成。
在Struts2中 自定义的封装了处理文件及对象类型数据的处理。
RequestParams params = new RequestParams();AsyncHttpClient client = new AsyncHttpClient();InputStream ff = null;try {ff = getResources().getAssets().open("11.jpg",AssetManager.ACCESS_RANDOM);//FileInputStream fin= ff;System.out.println((ff == null) + "asdfasdffdsa");System.out.println(ff.available() +"asdf");byte[] bytes=new byte[ff.available()];ff.read(bytes);ff.close(); params.put("username", "james"); params.put("password", "123456");params.put("file",new ByteArrayInputStream(bytes),"1.jpg"); HttpUtil.POST(client, params, null);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}
public static void Post(AsyncHttpClient asyncHttpClient,RequestParams params,AsyncHttpResponseHandler asyncHttpResponseHandler){SystemOut.out("url:"+1);asyncHttpClient.post("http://"+HOST+"/"+POST, params, asyncHttpResponseHandler);}
如果需要提交多个文件，就要以file[0],file[1]....这样提交，并在服务器对象方式接收文
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