提交数据到服务器

来源：互联网发布：面试谈谈工作经历知乎编辑：程序博客网时间：2024/06/04 18:35
public class NetUtils {/** * 使用get方式提交服务器获得 返回值信息 *  * @param username * @param userpwd * @return */public static String dogetinfo(String username, String userpwd) {HttpURLConnection conn = null;try {URL url = new URL("http://10.0.2.2:8080/demo/servlet/login?username="+ username + "&userpwd=" + userpwd);conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("GET");conn.setConnectTimeout(10000);conn.setReadTimeout(5000);int code = conn.getResponseCode();if (code == 200) {InputStream is = conn.getInputStream();return getStringFromInputStream(is);} else {Log.i("ssss", "访问失败");}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();} finally {if (conn != null) {conn.disconnect();}}return null;}/** * 使用post方式提交服务器获得 返回值信息 *  * @param username * @param userpwd * @return */public static String dopostinfo(String username, String userpwd) {HttpURLConnection conn = null;try {URL url = new URL("http://10.0.2.2:8080/demo/servlet/login");conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("POST");conn.setConnectTimeout(10000);conn.setReadTimeout(5000);String data = "username=" + username + "&userpwd=" + userpwd;OutputStream out = conn.getOutputStream();out.write(data.getBytes());out.flush();out.close();int code = conn.getResponseCode();if (code == 200) {InputStream is = conn.getInputStream();return getStringFromInputStream(is);} else {Log.i("ssss", "访问失败");}} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();} finally {if (conn != null) {conn.disconnect();}}return null;}/** * 使用httpclientget方式提交服务器获得 返回值信息   *  * @param username * @param userpwd * @return */public static String dohttpclientgetinfo(String username, String userpwd) {HttpClient client = null;try {// 定义一个客户端client = new DefaultHttpClient();String data = "username=" + username + "&userpwd=" + userpwd;// 定义一个httpget 当做get请求方法HttpGet get = new HttpGet("http://10.0.2.2:8080/demo/servlet/login?" + data);HttpResponse response = client.execute(get);// 开始执行get请求网络 这里// 保护返回信息和状态int statecodse = response.getStatusLine().getStatusCode();if (statecodse == 200) {InputStream is = response.getEntity().getContent();return getStringFromInputStream(is);} else {Log.i("错误", "错误");}} catch (Exception e) {} finally {if (client != null) {client.getConnectionManager().shutdown();// 关闭连接 释放资源}}return null;}/** * 使用httpclientpost方式提交服务器获得 返回值信息 *  * @param username * @param userpwd * @return */public static String dohttpclientpost(String username, String userpwd) {HttpClient client = null;try {// 定义一个客户端client = new DefaultHttpClient();String data = "username=" + username + "&userpwd=" + userpwd;// 定义一个httppost 当做post请求方法HttpPost post = new HttpPost("http://10.0.2.2:8080/demo/servlet/login");List<NameValuePair> parameters = new ArrayList<NameValuePair>();//定义参数listparameters.add(new BasicNameValuePair("username", username));//添加参数parameters.add(new BasicNameValuePair("userpwd", userpwd));HttpEntity entity = new UrlEncodedFormEntity(parameters);//增加参数post.setEntity(entity);//为post添加参数HttpResponse response = client.execute(post);// 开始执行post请求网络 这里// 保护返回信息和状态int statecodse = response.getStatusLine().getStatusCode();if (statecodse == 200) {InputStream is = response.getEntity().getContent();return getStringFromInputStream(is);} else {Log.i("错误", "错误");}} catch (Exception e) {} finally {if (client != null) {client.getConnectionManager().shutdown();// 关闭连接 释放资源}}return null;}private static String getStringFromInputStream(InputStream is)throws IOException {{ByteArrayOutputStream baos = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len = -1;while ((len = is.read(buffer)) != -1) {baos.write(buffer, 0, len);}is.close();String html = new String(baos.toByteArray(), "GBK");return html;}}}
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