package com.lifengfeng.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的方式登錄
* @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/Server/servlet/LoginServlet");
conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setConnectTimeout(10000); // 連接的超時時間
conn.setReadTimeout(5000); // 讀數據的超時時間
conn.setDoOutput(true); // 必須設置此方法, 允許輸出
// conn.setRequestProperty("Content-Length", 234); // 設置請求頭消息, 可以設置多個
// post請求的參數
String data = "username=" + userName + "&password=" + password;
// 獲得一個輸出流, 用於向服務器寫數據, 默認情況下, 系統不允許向服務器輸出內容
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 = getStringFromInputStream(is);
return state;
} else {
Log.i(TAG, "訪問失敗: " + responseCode);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if(conn != null) {
conn.disconnect();
}
}
return null;
}
/**
* 使用get的方式登錄
* @param userName
* @param password
* @return 登錄的狀態
*/
public static String loginOfGet(String userName, String password) {
HttpURLConnection conn = null;
try {
String data = "username=" + URLEncoder.encode(userName) + "&password=" + URLEncoder.encode(password);
URL url = new URL("http://10.0.2.2:8080/Server/servlet/LoginServlet?" + data);
conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET"); // get或者post必須得全大寫
conn.setConnectTimeout(10000); // 連接的超時時間
conn.setReadTimeout(5000); // 讀數據的超時時間
int responseCode = conn.getResponseCode();
if(responseCode == 200) {
InputStream is = conn.getInputStream();
String state = getStringFromInputStream(is);
return state;
} else {
Log.i(TAG, "訪問失敗: " + responseCode);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if(conn != null) {
conn.disconnect(); // 關閉連接
}
}
return null;
}
/**
* 根據流返回一個字符串信息
* @param is
* @return
* @throws IOException
*/
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 = baos.toString(); // 把流中的數據轉換成字符串, 採用的編碼是: utf-8
// String html = new String(baos.toByteArray(), "GBK");
baos.close();
return html;
}
}
Android 通過Get/Post提交請求數據到服務器
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