String url = "http://www.baidu.com";//將要訪問的url字符串放入HttpPost中HttpPost httpPost= new HttpPost(url);//請求頭 放置一些修改http請求頭和cookiehttpPost.setHeader("Accept", "application/json");......//如果是HttpPost或者HttpPut請求需要在請求里加參數，//而HttpGet或者HttpDelete請求則可以直接拼接到url字符串后面//向HttpPost中加入參數List<NameValuePair> values = new ArrayList<NameValuePair>();values.add(new NameValuePair("id", "1"));values.add(new NameValuePair("name", "xiaohong"));httpPost.setEntity(new UrlEncodeFormEntity(values, HTTP.UTF_8)); //進行轉碼//實例HttpClient 并執行帶有HttpPost的方法,返回HttpResponse 響應，再進行操作HttpClient httpClient = new DefaultHttpClient();HttpResponse httpResponse = httpClient.execute(httpPost);int statusCode = httpResponse.getStatusLine().getStatusCode(); //返回狀態碼 ，用來進行識別或者判斷訪問結果if(statusCode == 200){Instream in = httpResponse.getEntity().getContent(); //要處理該數據流是否為GZIP流}示例代碼如下：package cn.dratek.haoyingsheng.manager.client;import cn.dratek.haoyingsheng.manager.util.ResourceUtil; import net.dratek.browser.http.Cookie; import net.dratek.browser.http.CookieManager; import net.dratek.browser.http.URL; import org.apache.http.*; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpDelete; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.methods.HttpPut; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.protocol.HTTP; import java.io.IOException; import java.io.InputStream; import java.io.UnsupportedEncodingException; import java.util.List;public class HttpNetClient {/*** 所有get 請求底層調用方法** @param url 請求url* @return byte[] response data*/public static byte[] doGet(String url) {InputStream in;byte[] bre = null;HttpResponse response;CookieManager manager = CookieManager.getInstance();if (url != null && url.length() != 0) {URL myURL = URL.parseString(url);Cookie[] cookies = manager.getCookies(myURL);HttpGet httpGet = new HttpGet(url);if (cookies != null && cookies.length > 0) {StringBuilder sb = new StringBuilder();for (Cookie ck : cookies) {sb.append(ck.name).append('=').append(ck.value).append(";");}String sck = sb.toString();if (sck.length() > 0) {httpGet.setHeader("Cookie", sck);}//if}//ifhttpGet.setHeader("Accept-Encoding", "gzip, deflate");httpGet.setHeader("Accept-Language", "zh-CN");httpGet.setHeader("Accept", "application/json, application/xml, text/html, text/*, image/*, */*");try {response = new DefaultHttpClient().execute(httpGet);if (response != null) {int statusCode = response.getStatusLine().getStatusCode();if (statusCode == 200 || statusCode == 403) {Header[] headers = response.getHeaders("Set-Cookie");if (headers != null && headers.length > 0) {for (Header header : headers) {manager.setCookie(myURL, header.getValue());}//for}//ifin = response.getEntity().getContent();if (in != null) {bre = ResourceUtil.readStream(in);}//if}//if}//if} //trycatch (IOException e) {e.printStackTrace();}}return bre;}/*** 所有Post 請求底層調用方法** @param url 請求url* @param values 傳遞的參數* @return byte[] 返回數據 or null*/public static byte[] doPost(String url, List<NameValuePair> values) {System.out.println("url = " + url);byte[] bytes = null;HttpResponse response;InputStream inputStream = null;CookieManager manager = CookieManager.getInstance();if (url != null && url.length() != 0) {URL myurl = URL.parseString(url);Cookie[] cookies = manager.getCookies(myurl);HttpPost post = new HttpPost(url);if (cookies != null && cookies.length > 0) {StringBuilder sb = new StringBuilder();for (Cookie ck : cookies) {sb.append(ck.name).append('=').append(ck.value).append(";");}//forString sck = sb.toString();if (sck.length() > 0) {post.setHeader("Cookie", sck);}//if}//ifpost.setHeader("Accept-Encoding", "gzip, deflate");post.setHeader("Accept-Language", "zh-CN");post.setHeader("Accept", "application/json, application/xml, text/html, text/*, image/*, */*");DefaultHttpClient client = new DefaultHttpClient();try {if (values != null && values.size() > 0) {post.setEntity(new UrlEncodedFormEntity(values, HTTP.UTF_8));}response = client.execute(post);if (response != null) {int statusCode = response.getStatusLine().getStatusCode();if (statusCode == 200 || statusCode == 403) {Header[] headers = response.getHeaders("Set-Cookie");if (headers != null && headers.length > 0) {for (Header header : headers) {manager.setCookie(myurl, header.getValue());}//for}//ifinputStream = response.getEntity().getContent();}//if}//if}//trycatch (UnsupportedEncodingException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}if (inputStream != null) {bytes = ResourceUtil.readStream(inputStream);}}return bytes;}/*** PUT基礎請求** @param url 請求地址* @param values 提交參數* @return byte[] 請求成功后的結果*/public static byte[] doPut(String url, List<NameValuePair> values) {byte[] ret = null;CookieManager manager = CookieManager.getInstance();if (url != null && url.length() > 0) {URL myUrl = URL.parseString(url);StringBuilder sb = new StringBuilder();Cookie[] cookies = manager.getCookies(myUrl);if (cookies != null && cookies.length > 0) {for (Cookie cookie : cookies) {sb.append(cookie.name).append("=").append(cookie.value).append(";");}//for}//ifHttpPut request = new HttpPut(url);String sck = sb.toString();if (sck.length() > 0) {request.setHeader("Cookie", sck);}request.setHeader("Accept-Encoding", "gzip, deflate");request.setHeader("Accept-Language", "zh-CN");request.setHeader("Accept", "application/json, application/xml, text/html, text/*, image/*, */*");DefaultHttpClient client = new DefaultHttpClient();if (values != null && values.size() > 0) {try {UrlEncodedFormEntity entity;entity = new UrlEncodedFormEntity(values);request.setEntity(entity);} catch (UnsupportedEncodingException e) {e.printStackTrace();}}//iftry {HttpResponse response = client.execute(request);if (response != null) {StatusLine statusLine = response.getStatusLine();int statusCode = statusLine.getStatusCode();if (statusCode == 200 || statusCode == 403) {Header[] headers = response.getHeaders("Set-Cookie");if (headers != null && headers.length > 0) {for (Header header : headers) {manager.setCookie(myUrl, header.getValue());}}//ifHttpEntity entity = response.getEntity();InputStream inputStream = entity.getContent();if (inputStream != null) {ret = ResourceUtil.readStream(inputStream);inputStream.close();}//if}//if}//if} //trycatch (IOException e) {e.printStackTrace();}}//ifreturn ret;}/*** Delete基礎請求** @param url 請求地址* @return 請求成功后的結果*/public static byte[] doDelete(String url) {InputStream in;byte[] bre = null;HttpResponse response;CookieManager manager = CookieManager.getInstance();if (url != null && url.length() != 0) {URL myurl = URL.parseString(url);Cookie[] cookies = manager.getCookies(myurl);HttpDelete delete = new HttpDelete(url);if (cookies != null && cookies.length > 0) {StringBuilder sb = new StringBuilder();for (Cookie ck : cookies) {sb.append(ck.name).append('=').append(ck.value).append(";");}//forString sck = sb.toString();if (sck.length() > 0) {delete.setHeader("Cookie", sck);}}//fordelete.setHeader("Accept-Encoding", "gzip, deflate");delete.setHeader("Accept-Language", "zh-CN");delete.setHeader("Accept", "application/json, application/xml, text/html, text/*, image/*, */*");try {response = new DefaultHttpClient().execute(delete);if (response != null) {int statusCode = response.getStatusLine().getStatusCode();if (statusCode == 200 || statusCode == 403) {Header[] headers = response.getHeaders("Set-Cookie");if (headers != null && headers.length > 0) {for (Header header : headers) {manager.setCookie(myurl, header.getValue());}//for}//ifin = response.getEntity().getContent();if (in != null) {bre = ResourceUtil.readStream(in);}}//if}//if} catch (IOException e) {e.printStackTrace();}}return bre;}}

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