android 使用HttpURLConnection方式提交get/post请求

源码链接

package com.zhangbz.submitdata.Utils;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder; import android.util.Log; public class NetUtils { private static final String TAG = "NetUtils";
/**
* 使用post的方式登录
* @param userName
* @param password
* @return
*/
public static String loginOfPost(String userName, String password){
HttpURLConnection conn = null;
try {
URL url = new URL("http://10.0.2.2:8080/serverzhangbz/servlet/LoginServlet?"); conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("POST");
conn.setReadTimeout(10000); //连接的超时时间
conn.setReadTimeout(5000); //读数据的超时时间
conn.setDoOutput(true);//必须设置此方法,允许输出
//conn.setRequestProperty("content-Length", 234); //设置请求头消息,可以设置多个 //post请求的参数
String data = "username=" + userName + "&password=" + password; //获得一个输出流,用于向服务器写数据,默认情况下,系统不予许向服务器输出内容
OutputStream out = conn.getOutputStream();
out.write(data.getBytes());
out.flush();
out.close(); int responseCode = conn.getResponseCode();
if(responseCode == 200) {
InputStream is = conn.getInputStream();
String state = getSringFromInputStream(is);
Log.i(TAG, state);
return state;
} else {
Log.i(TAG, "访问失败:" + responseCode);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
if(conn != null) {
conn.disconnect(); //关闭连接
}
} return null;
} /**
* 使用get的方式登录
* @param userName
* @param password
* @return
*/
public static String logOfPost(String userName, String password) {
HttpURLConnection conn = null; //局部变量在使用时必须进行初始化
try {
String data = "username=" + URLEncoder.encode(userName) + "&password=" + URLEncoder.encode(password);
URL url = new URL("http://10.0.2.2:8080/serverzhangbz/servlet/LoginServlet?" + data);
conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET");//get或者post必须得全大写
conn.setReadTimeout(10000);//连接的超时时间
conn.setReadTimeout(5000);//读数据的超时连接 int responseCode = conn.getResponseCode();
if(responseCode == 200) {
InputStream is = conn.getInputStream();
String state = getSringFromInputStream(is);
Log.i(TAG, state);
return state;
} else {
Log.i(TAG, "访问失败:" + responseCode);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if(conn != null) {
conn.disconnect(); //关闭连接
}
} return null; } /**
* 根据流返回一个字符串信息
* @param is
* @return
* @throws IOException
*/
private static String getSringFromInputStream(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 = baos.toString(); //把流中的数据转换成字符串,采用的编码是:utf-8 //String html = new String(baos.toByteArray(), "GBK"); baos.close();
return html;
}
}
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