android app与服务器交互

package mydemo.mycom.demo2.service;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair; import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List; import mydemo.mycom.demo2.utils.StreamTools; /**
* Created by Administrator on 2015/5/20.
*/
public class NetService { //使用URL的Get 方式请求服务器
public static String loginByGet(String username, String password) {
try {
String path = "http://192.168.1.110:1010/UserInfo/Login?username=" + username + "&password=" + password;
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(5000);
conn.setRequestMethod("GET");
int code = conn.getResponseCode();
if (code == 200) {
//请求成功
InputStream is = conn.getInputStream();
String result = StreamTools.readInputStream(is);
return result;
} else {
//请求失败
return null;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
} //使用URL的Post 方式请求服务器
public static String loginByPost(String username, String password) {
try {
String path = "http://192.168.1.110:1010/UserInfo/Login";
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(5000);
conn.setRequestMethod("POST");
String data = "username=" + username + "&password=" + password; conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("Content-Length", data.length() + ""); //post 的方式 实际上是浏览器把数据 写给了服务器
conn.setDoInput(true);
OutputStream os = conn.getOutputStream();
os.write(data.getBytes());
int code = conn.getResponseCode();
if (code == 200) {
//请求成功
InputStream is = conn.getInputStream();
String result = StreamTools.readInputStream(is);
return result;
} else {
//请求失败
return null;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
} //使用HttpClient的Get 方式请求服务器 (HttpClient 过时)
public static String loginByClientGet(String username, String password) {
try {
HttpClient client = new DefaultHttpClient();
String path = "http://192.168.1.110:1010/UserInfo/Login?username=" + username + "&password=" + password;
HttpGet httpget = new HttpGet(path);
HttpResponse response = client.execute(httpget);
int code = response.getStatusLine().getStatusCode();
if (code == 200) {
//请求成功
InputStream is = response.getEntity().getContent();
String result = StreamTools.readInputStream(is);
return result;
} else {
//请求失败
return null;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
} //使用HttpClient的Post 方式请求服务器 (HttpClient 过时)
public static String loginByClientPost(String username, String password) {
try {
HttpClient client = new DefaultHttpClient();
String path = "http://192.168.1.110:1010/UserInfo/Login";
HttpPost httppost = new HttpPost(path);
//指定要提交的数据实体
List<NameValuePair> list = new ArrayList<NameValuePair>();
list.add(new BasicNameValuePair("username", username));
list.add(new BasicNameValuePair("password", password));
httppost.setEntity(new UrlEncodedFormEntity(list, "UTF_8"));
HttpResponse response = client.execute(httppost);
int code = response.getStatusLine().getStatusCode();
if (code == 200) {
//请求成功
InputStream is = response.getEntity().getContent();
String result = StreamTools.readInputStream(is);
return result;
} else {
//请求失败
return null;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
} }

//将InputStream 转为 String

package mydemo.mycom.demo2.utils;

import java.io.ByteArrayOutputStream;
import java.io.InputStream; public class StreamTools { //InputStream 转为 String
public static String readInputStream(InputStream is)
{
try
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int len =0;
byte[] buffer = new byte[1024];
while((len=is.read(buffer))!=-1)
{
baos.write(buffer,0,len);
}
is.close();
baos.close(); byte[] result = baos.toByteArray();
String temp = new String(result);
return temp;
}catch (Exception e)
{
e.printStackTrace();
return null;
} } }
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