android + tomcat + eclipse實現登入
阿新 • • 發佈：2018-11-19
客戶端開發平臺：Android studio（ sdk版本26 ，模擬器 Android7.0）
伺服器開發平臺：eclipse+tomcat*
服務端
1.新建名為login_server的動態web專案（注意勾選自動新增web.xml配置檔案）
2.在專案Java目錄中新建包：main
3.在包main下新建名為Login的servlet
4.然後寫新增程式碼：
public class Login extends HttpServlet {
private static final long serialVersionUID = 1L;
public Login() { } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request,response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); response.setCharacterEncoding("utf-8"); PrintWriter out = response.getWriter(); String loginName = request.getParameter("name"); String loginPwd = request.getParameter("pwd"); if(loginName.equals("1")&&loginPwd.equals("1")) { System.out.println("success in Server "); out.print(true); // request.getRequestDispatcher("success.html").forward(request, response); }else { out.print(false); } } }
在web.xml配置檔案中寫上如下程式碼：
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>fleaMarket</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>Login</servlet-name> <servlet-class>main.Login</servlet-class> </servlet> <servlet-mapping> <servlet-name>Login</servlet-name> <url-pattern>/Login</url-pattern> </servlet-mapping> </web-app>
5.再webContent目錄下新增名為index的html檔案，新增如下程式碼
客戶端程式碼：<body> <form action="Login" method="post"> <table align="center"> <tr> <td>user:</td> <td><input type="text" name="name"></td> </tr> <tr> <td>password:</td> <td><input type="text" name="pwd"></td> </tr> <tr> <tr> <td>submit</td> <td><input type="submit"></td> </tr> </table>
1.在android studio上新建一個名為fleaMarket專案
2.新建Java類LoginServer，程式碼如下：
public class LoginToServer {
private String result;
private Boolean isConnect = false;
private String url = "http://192.168.43.3:8080/fleaMarket/Login";//連線伺服器的地址，千萬別弄錯了
private OkHttpClient okHttpClient = new OkHttpClient();
public String doPost(String name,String pwd) throws IOException{
RequestBody formBody = new FormBody.Builder()
.add("name",name)
.add("pwd",pwd)
.build();
final Request request = new Request.Builder()
.url(url)
.post(formBody)
.build();
Response response;
try{
response = okHttpClient.newCall(request).execute();
Log.d("loginToServer",String.valueOf(response.isSuccessful()));
if (response.isSuccessful()){
isConnect = true;
}
if(isConnect){
result = response.body().string();
}
}catch (IOException e){
e.printStackTrace();
}
return result;
}
}
3.在主活動MainActivity的程式碼如下：
public class MainActivity extends AppCompatActivity {
private EditText name;
private EditText pwd;
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initail();
button.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
final Handler myHandler = new Handler(){
public void handleMessage(Message msg){
String responseResult = (String)msg.obj;
if(responseResult.equals("true")){
Toast.makeText(MainActivity.this,"登入成功",Toast.LENGTH_SHORT).show();
}else {
Toast.makeText(MainActivity.this,"登入失敗",Toast.LENGTH_SHORT).show();
}
}
};
new Thread(new Runnable() {
@Override
public void run() {
LoginToServer loginToServer = new LoginToServer();
try{
String result = loginToServer.doPost(name.getText().toString().trim(),pwd.getText().toString().trim());
Message message = new Message();
message.obj = result;
Log.d("Main result",result);
myHandler.sendMessage(message);
}catch(IOException e){
e.printStackTrace();
}
}
}).start();
}
});
}
public void initail(){
name = (EditText)findViewById(R.id.name);
pwd = (EditText)findViewById(R.id.password);
button = (Button)findViewById(R.id.login);
}
}
5.主活動的佈局檔案程式碼：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:id="@+id/name"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="姓名"/>
<EditText
android:id="@+id/password"
android:layout_width="match_parent"
android:layout_height="50dp"
android:hint="密碼"
android:inputType="textPassword"/>
<Button
android:id="@+id/login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="登入"
android:textSize="26sp"
android:textColor="#000"/>
<uses-permission android:name="android.permission.INTERNET"/>
補充：
1.先在tomcat上啟動index.html
2.然後在客戶端啟動Android專案後就可以連線伺服器了！
3.在eclipse下的console中可以看到來自客戶端的請求