HttpPost工具类
import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.ProtocolException;import java.net.URL;import android.content.Context;/** * 向服务器端发送POST数据 * @author LinHang_He * */public class PostUtils {private String path;private Context context=null;public PostUtils(String path){this.path=path;}/** * 构造函数 * @param path 请求URL地址 * @param context 当前上下文对象 */public PostUtils(String path,Context context){this.path=path;this.context=context;}/** * 发送POST请求 * @param str 向服务器端发送的数据 * @return */public String setPostRequest(String str){try {byte [] entity=str.getBytes();HttpURLConnection conn=(HttpURLConnection)new URL(path).openConnection();conn.setConnectTimeout(5000);conn.setRequestMethod("POST");conn.setDoOutput(true);conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");conn.setRequestProperty("Content-Length",String.valueOf(entity.length));OutputStream outStream=conn.getOutputStream();outStream.write(entity);InputStream is=conn.getInputStream();if(conn.getResponseCode()==200){return inputStreamToString(is,"utf-8");}else{System.out.println("error");return "timeout";}} catch (MalformedURLException e) {// TODO Auto-generated catch blocke.printStackTrace();return "timeout";} catch (ProtocolException e) {// TODO Auto-generated catch blocke.printStackTrace();return "timeout";} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();return "timeout";}}/** * 将字符流转换成字符串 * @param is 输入数据流 * @param encoding 字符编码 * @return */private String inputStreamToString(InputStream is, String encoding) { try { // byte[] b = new byte[1024]; byte[] b = new byte[1]; String res = ""; if (is == null) { return ""; } int bytesRead = 0; while (true) { bytesRead = is.read(b, 0, 1); // return final read bytes counts if (bytesRead == -1) {// end of InputStream return res; } res += new String(b, 0, bytesRead, encoding); // convert to string using bytes } } catch (Exception e) { e.printStackTrace(); System.out.print("Exception: " + e); return ""; }}}
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