今天的實現方法比較簡單，就不打太多的註釋了，都是一些死腦筋
首先實現服務器
簡單的登錄界面測試
<form action="login.do" method="post">
用戶名：<input type="text" name="uname"/><br/>
密碼：<input type="password" name="upass"/><br/>
<input type="submit" value="登錄" />
</form>登錄的業務邏輯
public class LoginServlet extends HttpServlet{
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//獲取用戶名密碼
String uname=req.getParameter("uname");
String upass=req.getParameter("upass");
System.out.println(uname+" "+upass);
String result=null;
//判斷
if("admin".equals(uname)&&"123".equals(upass)){
result="success";
}else{
result="fail";
}
PrintWriter pw=resp.getWriter();
pw.write(result);
pw.close();
}
}
web.xml進行配置
<servlet>
<servlet-name>loginServlet</servlet-name>
<servlet-class>com.bihua.Servlet.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>loginServlet</servlet-name>
<url-pattern>/login.do</url-pattern>
</servlet-mapping>簡單的登錄界面，三個測試方法
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="請輸入用戶名"
android:id="@+id/et_main_uname"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="請輸入密碼"
android:id="@+id/et_main_upass"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="登錄(Get)"
android:onClick="loginGet"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="登錄(Post)"
android:onClick="loginPost"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="登錄(AsyncHttpClient)"
android:onClick="loginAsynHttpClient"
/>public class MainActivity extends AppCompatActivity {
private EditText et_main_uname;
private EditText et_main_upass;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et_main_uname = (EditText) findViewById(R.id.et_main_uname);
et_main_upass = (EditText) findViewById(R.id.et_main_upass);
}
public void loginGet(View view){
String uname=et_main_uname.getText().toString();
String upass=et_main_upass.getText().toString();
String path="http://192.168.43.107:8080/G160628_Server/login.do";
new MyGetTask().execute(uname,upass,path);
}
public void loginPost(View view){
String uname=et_main_uname.getText().toString();
String upass=et_main_upass.getText().toString();
String path="http://192.168.43.107:8080/G160628_Server/login.do";
new myPostTask().execute(uname,upass,path);
}
public void loginAsynHttpClient(View view){
String uname=et_main_uname.getText().toString();
String upass=et_main_upass.getText().toString();
//path用do接收
String path="http://192.168.43.107:8080/G160628_Server/login.do";
AsyncHttpClient ahc=new AsyncHttpClient();
RequestParams params=new RequestParams();
params.put("uname",uname);
params.put("upass",upass);
ahc.post(this,path,params,new TextHttpResponseHandler(){
@Override
public void onFailure(int statusCode, Header[] headers, String responseBody, Throwable error) {
super.onFailure(statusCode, headers, responseBody, error);
Toast.makeText(MainActivity.this, ""+responseBody, Toast.LENGTH_SHORT).show();
}
@Override
public void onSuccess(int statusCode, Header[] headers, String responseBody) {
super.onSuccess(statusCode, headers, responseBody);
Toast.makeText(MainActivity.this, ""+responseBody, Toast.LENGTH_SHORT).show();
}
});
}
class MyGetTask extends AsyncTask{
@Override
protected Object doInBackground(Object[] objects) {
String uname=objects[0].toString();
String upass=objects[1].toString();
String path=objects[2].toString();
try {
URL url=new URL(path+"?uname="+uname+"&upass="+upass);
HttpURLConnection connection= (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setConnectTimeout(5000);
if(connection.getResponseCode()==200){
InputStream is=connection.getInputStream();
BufferedReader br=new BufferedReader(new InputStreamReader(is));
String s=br.readLine();
return s;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
String s= (String) o;
Toast.makeText(MainActivity.this, ""+s, Toast.LENGTH_SHORT).show();
}
}
class myPostTask extends AsyncTask{
@Override
protected Object doInBackground(Object[] objects) {
String uname=objects[0].toString();
String upass=objects[1].toString();
String path=objects[2].toString();
try {
URL url=new URL(path);
HttpURLConnection conn= (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setConnectTimeout(5000);
//添加請求頭
//admin 123
//uname=admin&upass=123
String s="uname="+uname+"&upass="+upass;
conn.setRequestProperty("Content-Length",s.length()+"");
conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
//允許對外輸出
conn.setDoOutput(true);
OutputStream os=conn.getOutputStream();
os.write(s.getBytes());
if(conn.getResponseCode()==200){
InputStream is=conn.getInputStream();
BufferedReader br=new BufferedReader(new InputStreamReader(is));
String str=br.readLine();
return str;
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
String s= (String) o;
Toast.makeText(MainActivity.this, ""+o, Toast.LENGTH_SHORT).show();
}
}
}配置獲得網絡權限
<uses-permission android:name="android.permission.INTERNET"></uses-permission>注意
AsyncHttpClient需要導入jar包
並且在項目對應的.gradle文件中版本號的前面加上
useLibrary 'org.apache.http.legacy'這一串