Android客户端+JavaWeb服务器远程登入

一、Android客户端

1、登入界面main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView  android:gravity="center"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="用户登陆"/>
<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<TextView  android:gravity="right"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="用户名："/>
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/username"/>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<TextView  android:gravity="right"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="密码："/>
<EditText  android:password="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/password"/>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<Button  android:layout_marginLeft="160px"
android:id="@+id/login"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="登陆"/>
<Button  android:id="@+id/reset"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="重置"/>
</LinearLayout>

</LinearLayout>

2、LoginActivity

package com.bao;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class LoginActivity extends Activity {
/** Called when the activity is first created. */

private EditText username;
private EditText password;
private Button login;
private Button reset;
UserManager userManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

username = (EditText)findViewById(R.id.username);
password = (EditText)findViewById(R.id.password);
login = (Button)findViewById(R.id.login);
reset = (Button)findViewById(R.id.reset);
userManager = new UserManager();
login.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub
boolean isSuccess = userManager.isRightUser(username.getText().toString(), password.getText().toString());
if(isSuccess == true){
Toast.makeText(LoginActivity.this, "登陆成功", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(LoginActivity.this, "密码或用户名错误", Toast.LENGTH_LONG).show();

}
}
});

reset.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub
username.setText("");
password.setText("");
}
});

}
}

3、用户管理类UserManager

package com.bao;

public class UserManager {
UrlConnectionToServer urlConnectionToServer = new UrlConnectionToServer();

HttpClientToServer httpClientToServer = new HttpClientToServer();

public boolean isRightUser(String username,String password){

//使用urlConnection POST连接服务器
//String response = urlConnectionToServer.doPost(username, password);

//使用urlConnection Get连接服务器
//String response = urlConnectionToServer.doGet(username, password);

//使用HttpClientGet连接服务器
//String response = httpClientToServer.doGet(username, password);

//使用HttpClientPOST连接服务器
String response = httpClientToServer.doPost(username, password);
if("true".equals(response)){
return true;
}else{
return false;
}

}

}

4、连接服务器httpClientToServer

package com.bao;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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 org.apache.http.util.EntityUtils;

public class HttpClientToServer {

String urlAddress = "http://10.0.0.10:8080/AndroidServer/login.do";
public HttpClientToServer(){

}

public String doGet(String username,String password){

String getUrl = urlAddress + "?username="+username+"&password="+password;
HttpGet httpGet = new HttpGet(getUrl);
//HttpParams hp = httpGet.getParams();
//hp.
//httpGet.setp
HttpClient hc = new DefaultHttpClient();
try {
HttpResponse ht = hc.execute(httpGet);
if(ht.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
HttpEntity he = ht.getEntity();
InputStream is = he.getContent();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String response = "";
String readLine = null;
while((readLine =br.readLine()) != null){
//response = br.readLine();
response = response + readLine;
}
is.close();
br.close();

//String str = EntityUtils.toString(he);
System.out.println("========="+response);
return response;
}else{
return "error";
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "exception";
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "exception";
}

}

public String doPost(String username,String password){
//String getUrl = urlAddress + "?username="+username+"&password="+password;
HttpPost httpPost = new HttpPost(urlAddress);
List params = new ArrayList();
NameValuePair pair1 = new BasicNameValuePair("username", username);
NameValuePair pair2 = new BasicNameValuePair("password", password);
params.add(pair1);
params.add(pair2);
HttpEntity he;
try {
he = new UrlEncodedFormEntity(params, "gbk");
httpPost.setEntity(he);
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}

HttpClient hc = new DefaultHttpClient();
try {
HttpResponse ht = hc.execute(httpPost);
if(ht.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
HttpEntity het = ht.getEntity();
InputStream is = het.getContent();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String response = "";
String readLine = null;
while((readLine =br.readLine()) != null){
//response = br.readLine();
response = response + readLine;
}
is.close();
br.close();

//String str = EntityUtils.toString(he);
System.out.println("========="+response);
return response;
}else{
return "error";
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "exception";
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "exception";
}

}

}

5、使用urlConnection POST连接服务器

package com.bao;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class UrlConnectionToServer {

String urlAddress = "http://10.0.0.10:8080/AndroidServer/login.do";
URL url;
HttpURLConnection uRLConnection;
public UrlConnectionToServer(){

}

public String doGet(String username,String password){

String getUrl = urlAddress + "?username="+username+"&password="+password;
try {
url = new URL(getUrl);
uRLConnection = (HttpURLConnection)url.openConnection();
InputStream is = uRLConnection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String response = "";
String readLine = null;
while((readLine =br.readLine()) != null){
//response = br.readLine();
response = response + readLine;
}
is.close();
br.close();
uRLConnection.disconnect();
return response;
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}

}

public String doPost(String username,String password){
try {
url = new URL(urlAddress);
uRLConnection = (HttpURLConnection)url.openConnection();
uRLConnection.setDoInput(true);
uRLConnection.setDoOutput(true);
uRLConnection.setRequestMethod("POST");
uRLConnection.setUseCaches(false);
uRLConnection.setInstanceFollowRedirects(false);
uRLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
uRLConnection.connect();

DataOutputStream out = new DataOutputStream(uRLConnection.getOutputStream());
String content = "username="+username+"&password="+password;
out.writeBytes(content);
out.flush();
out.close();

InputStream is = uRLConnection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String response = "";
String readLine = null;
while((readLine =br.readLine()) != null){
//response = br.readLine();
response = response + readLine;
}
is.close();
br.close();
uRLConnection.disconnect();
return response;
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}

}

}

二、服务器

2.1、界面

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>

<body>
登陆测试. <hr>
<form action="login.do" method="post">
<input type="text" name="username"/><br/>
<input type="password" name="password"/><br/>
<input type="submit" value="submit"/>
<input type="reset" value="reset"/>
</form>
</body>
</html>

2.1、servlet处理模块LoginServlet

package com.bao;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* 登陆servlet
* @author Fly
* @Email jianbao_216@163.com
*
*/
public class LoginServlet extends HttpServlet {

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// TODO Auto-generated method stub
//super.doGet(req, resp);
System.out.println("=========doGet========");
this.doPost(req, resp);
}

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// TODO Auto-generated method stub
//super.doPost(req, resp);
PrintWriter pw = resp.getWriter();
System.out.println("=========doPost========");
String username = req.getParameter("username");
String password = req.getParameter("password");
System.out.println("=========username========"+username);
System.out.println("=========password========"+password);

//实际为数据库查询，模拟登陆成功
if("test".equals(username) && "test".equals(password)){
pw.println(true);
}else{
pw.println(false);
}
}

}