use student id as primary key instead.

src/main/java/love/sola/netsupport/Index.java

@@ -1,5 +1,7 @@
 package love.sola.netsupport;
 
+import love.sola.netsupport.config.Settings;
+
 import javax.servlet.ServletException;
 import javax.servlet.annotation.WebServlet;
 import javax.servlet.http.HttpServlet;

src/main/java/love/sola/netsupport/api/GetUser.java

@@ -45,7 +45,7 @@ public class GetUser extends HttpServlet {
 			out.println(gson.toJson(new Response(Response.ResponseCode.PARAMETER_REQUIRED)));
 		} else if (id != null) {
 			try {
-				User u = TableUser.getUserById(Integer.parseInt(id));
+				User u = TableUser.getUserById(Long.parseLong(id));
 				if (u == null)
 					out.println(gson.toJson(new Response(Response.ResponseCode.USER_NOT_FOUND)));
 				else

src/main/java/love/sola/netsupport/pojo/User.java

@@ -14,9 +14,8 @@ import love.sola.netsupport.enums.ISPType;
 @AllArgsConstructor
 public class User {
 
-	private final int id;
+	private final long id;
 	private final String name;
-	private final long studentId;
 	private String netAccount;
 	private ISPType isp;
 	private String wechatId;

src/main/java/love/sola/netsupport/sql/TableUser.java

@@ -18,7 +18,6 @@ public class TableUser extends SQLCore {
 
 	public static final String COLUMN_ID = "id";
 	public static final String COLUMN_NAME = "name";
-	public static final String COLUMN_STUDENT_ID = "studentid";
 	public static final String COLUMN_NET_ACCOUNT = "netaccount";
 	public static final String COLUMN_ISP = "isp";
 	public static final String COLUMN_WECHAT = "wechat";
@@ -29,32 +28,51 @@ public class TableUser extends SQLCore {
 			ps.setString(1, name);
 			ResultSet rs = ps.executeQuery();
 			if (rs.next()) {
-				return new User(rs.getInt(COLUMN_ID),
+				return new User(rs.getLong(COLUMN_ID),
 						rs.getString(COLUMN_NAME),
-						rs.getLong(COLUMN_STUDENT_ID),
 						rs.getString(COLUMN_NET_ACCOUNT),
 						ISPType.fromId(rs.getInt(COLUMN_ISP)),
 						rs.getString(COLUMN_WECHAT));
 			}
-		} catch (SQLException e) { }
+		} catch (SQLException e) {
+			e.printStackTrace();
+		}
 		return null;
 	}
 
-	public static User getUserById(int id) {
+	public static User getUserById(long id) {
 		try (Connection conn = ds.getConnection()) {
 			PreparedStatement ps = conn.prepareStatement("SELECT * FROM user_info WHERE id=?");
-			ps.setInt(1, id);
+			ps.setLong(1, id);
 			ResultSet rs = ps.executeQuery();
 			if (rs.next()) {
-				return new User(rs.getInt(COLUMN_ID),
+				return new User(rs.getLong(COLUMN_ID),
 						rs.getString(COLUMN_NAME),
-						rs.getLong(COLUMN_STUDENT_ID),
 						rs.getString(COLUMN_NET_ACCOUNT),
 						ISPType.fromId(rs.getInt(COLUMN_ISP)),
 						rs.getString(COLUMN_WECHAT));
 			}
-		} catch (SQLException e) { }
+		} catch (SQLException e) {
+			e.printStackTrace();
+		}
 		return null;
 	}
 
+	public static int updateUser(User user) {
+		try (Connection conn = ds.getConnection()) {
+			PreparedStatement ps = conn.prepareStatement("UPDATE user_info SET " +
+					COLUMN_WECHAT + "=?," +
+					COLUMN_NET_ACCOUNT + "=?," +
+					COLUMN_ISP + "=? " +
+					"WHERE id=?");
+			ps.setString(1, user.getWechatId());
+			ps.setString(2, user.getNetAccount());
+			ps.setInt(3, user.getIsp().id);
+			ps.setLong(4, user.getId());
+			return ps.executeUpdate();
+		} catch (SQLException e) {
+			e.printStackTrace();
+		}
+		return -1;
+	}
 }

src/main/java/love/sola/netsupport/wechat/WxMpServlet.java

@@ -52,6 +52,7 @@ public class WxMpServlet extends HttpServlet {
 		wxMpMessageRouter = new WxMpMessageRouter(wxMpService);
 		wxMpMessageRouter.rule()
 				.async(false)
+				.msgType("text")
 				.matcher(new CommandMatcher(Command.REGISTER))
 				.handler(new RegisterHandler())
 				.interceptor(checkSpamInterceptor)

src/main/java/love/sola/netsupport/wechat/handler/RegisterHandler.java

@@ -1,6 +1,7 @@
 package love.sola.netsupport.wechat.handler;
 
 import love.sola.netsupport.pojo.User;
+import love.sola.netsupport.sql.TableUser;
 import love.sola.netsupport.wechat.Command;
 import love.sola.netsupport.wechat.matcher.CommandMatcher;
 import me.chanjar.weixin.common.exception.WxErrorException;
@@ -22,24 +23,69 @@ import java.util.Map;
  */
 public class RegisterHandler implements WxMpMessageHandler {
 
+	public static final String STUDENT_ID_REGEX = "^(2012|2013|2014|2015)[0-9]{9}";
+
 	Map<String, User> pre_confirm = new HashMap<>();
+	Map<String, User> confirmed = new HashMap<>();
 
 	@Override
 	public WxMpXmlOutMessage handle(WxMpXmlMessage wxMessage, Map<String, Object> context, WxMpService wxMpService, WxSessionManager sessionManager)
 			throws WxErrorException {
 		TextBuilder out = WxMpXmlOutMessage.TEXT().fromUser(wxMessage.getToUserName()).toUser(wxMessage.getFromUserName());
-		String in = wxMessage.getContent();
+		handle(wxMessage.getContent(), wxMessage.getFromUserName(), out);
-		String userName = wxMessage.getFromUserName();
-		if (in.matches(Command.REGISTER.getRegex())) {
-			out.content("Welcome, please type your student identification number.");
-		} else if (pre_confirm.containsKey(userName)) {
-			//TODO
-
-		} else {
-			out.content("Illegal Operation.");
-			CommandMatcher.inCmdUsers.remove(userName);
-		}
 		return out.build();
 	}
 
+	private void handle(String in, String userName, TextBuilder out) {
+		if (in.matches(Command.REGISTER.getRegex())) {
+			out.content("Welcome, please type your student identification number.");
+			return;
+		}
+		if (pre_confirm.containsKey(userName)) {
+			User user = pre_confirm.get(userName);
+			if (in.trim().equals(user.getName())) {
+				pre_confirm.remove(userName);
+				confirmed.put(userName, user);
+				out.content("Confirmed Success.\n" +
+						"Please enter your ISP.");
+			} else {
+				out.content("Validate failed.\n" +
+						"if you have any issue, please contact administrator.\n" +
+						"Type 'q' to cancel this operation.");
+			}
+			return;
+		}
+		if (confirmed.containsKey(userName)) {
+			User user = pre_confirm.get(userName);
+			if (user.getIsp() == null) {
+				//TODO
+			}
+			return;
+		}
+		if (in.equalsIgnoreCase("q")) {
+			CommandMatcher.inCmdUsers.remove(userName);
+			pre_confirm.remove(userName);
+			confirmed.remove(userName);
+			out.content("Operation Canceled.");
+			return;
+		}
+		Long sid = checkStudentId(in);
+		User user;
+		if (sid == null || (user = TableUser.getUserById(sid)) == null) {
+			out.content("Invalid student identification number. Type 'q' to cancel this operation.");
+			return;
+		}
+		pre_confirm.put(userName, user);
+		out.content("Please type your real name to validate.");
+	}
+
+	private Long checkStudentId(String studentId) {
+		if (studentId.matches(STUDENT_ID_REGEX)) {
+			try {
+				return Long.parseLong(studentId);
+			} catch (NumberFormatException ignored) { }
+		}
+		return null;
+	}
+
 }

src/test/java/love/sola/netsupport/wechat/TestGson.java

@@ -0,0 +1,26 @@
+package love.sola.netsupport.wechat;
+
+import com.google.gson.Gson;
+import love.sola.netsupport.config.Settings;
+import org.junit.Test;
+
+/**
+ * ***********************************************
+ * Created by Sola on 2015/11/26.
+ * Don't modify this source without my agreement
+ * ***********************************************
+ */
+public class TestGson {
+
+	@Test
+	public void testGson() {
+		Gson gson = new Gson();
+		Settings settings = new Settings();
+		settings.Wechat_AppId = "*";
+		settings.Wechat_Secret = "*";
+		settings.Wechat_Token = "*";
+		settings.Wechat_AesKey = "*";
+		System.out.println(gson.toJson(settings));
+	}
+
+}

src/test/java/love/sola/netsupport/wechat/TestRegex.java

@@ -0,0 +1,21 @@
+package love.sola.netsupport.wechat;
+
+import org.junit.Test;
+
+/**
+ * ***********************************************
+ * Created by Sola on 2015/11/26.
+ * Don't modify this source without my agreement
+ * ***********************************************
+ */
+public class TestRegex {
+
+	public static final String STUDENT_ID_REGEX = "^(2012|2013|2014|2015)[0-9]{9}";
+
+	@Test
+	public void testStudentId() {
+		System.out.println("2011130201233".matches(STUDENT_ID_REGEX));
+		System.out.println("2015130201233".matches(STUDENT_ID_REGEX));
+	}
+
+}