最近在做一个小项目，项目开发中需要实现一个登录验证功能，具体的要求就是，在Android端输入用户名和密码，在服务器端验证MySQL数据库中是否有此用户，实现之前当然首要的是，如何使Android端的数据发送到服务器端，具体的实现方法：
服务器端：ManageServlet.java
public class ManageServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
String name = request.getParameter("name");
String password = request.getParameter("password");
System.out.println("用户名："+name+" 密码："+password);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
}
}
在这里实现的仅仅是把用户端的数据在控制台打印出来，相信学过jsp开发的大神，剩下的数据验证应该不在话下，在此不再赘述。
接下来就是Android端了：
主activity：MainActivity.java
public class MainActivity extends Activity {
private EditText textname = null;
private EditText textpassword = null;
private Button button = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textname = (EditText)findViewById(R.id.name);
textpassword = (EditText)findViewById(R.id.password);
button = (Button)findViewById(R.id.button);
button.setOnClickListener(new mybuttonlistener());
}
class mybuttonlistener implements OnClickListener{
boolean result=false;
String name;
String password;
public void onClick(View v) {
try {
name = textname.getText().toString();
name = new String(name.getBytes("ISO8859-1"), "UTF-8");
password = textpassword.getText().toString();
password = new String(password.getBytes("ISO8859-1"), "UTF-8");
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
result = NewsService.save(name,password);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(result){
Toast.makeText(MainActivity.this, R.string.ok, Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(MainActivity.this, R.string.error, Toast.LENGTH_SHORT).show();
}
}
}
}
布局文件：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${relativePackage}.${activityClass}"
>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/name" />
<EditText
android:id="@+id/name"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="@string/playname"
android:singleLine="true"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/password" />
<EditText
android:id="@+id/password"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:password="true"
android:hint="@string/playpass"
android:singleLine="true"
/>
<Button
android:id="@+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:onClick=""
android:text="@string/submit"
/>
</LinearLayout>
</RelativeLayout>
用于向服务器端发送数据的service（NewsService）：
public class NewsService {
/**
* 登录验证
* @param name 姓名
* @param password 密码
* @return
*/
public static boolean save(String name, String password){
String path = "http://192.168.1.104:8080/Register/ManageServlet";
Map<String, String> student = new HashMap<String, String>();
student.put("name", name);
student.put("password", password);
try {
return SendGETRequest(path, student, "UTF-8");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return false;
}
/**
* 发送GET请求
* @param path 请求路径
* @param student 请求参数
* @return 请求是否成功
* @throws Exception
*/
private static boolean SendGETRequest(String path, Map<String, String> student, String ecoding) throws Exception{
// http://127.0.0.1:8080/Register/ManageServlet?name=1233&password=abc
StringBuilder url = new StringBuilder(path);
url.append("?");
for(Map.Entry<String, String> map : student.entrySet()){
url.append(map.getKey()).append("=");
url.append(URLEncoder.encode(map.getValue(), ecoding));
url.append("&");
}
url.deleteCharAt(url.length()-1);
System.out.println(url);
HttpsURLConnection conn = (HttpsURLConnection)new URL(url.toString()).openConnection();
conn.setConnectTimeout(100000);
conn.setRequestMethod("GET");
if(conn.getResponseCode() == 200){
return true;
}
return false;
}
}
红色的为自己电脑的IP地址。
因为需要连接网络，一定要在AndroidManifest.xml进行网络权限配置：
<uses-permission android:name="android.permission.INTERNET"/>
写到这里基本已经把Android向服务器端发送数据，给大家分享完毕，如有不对的地方还望指正。