修正了登陆注册错误检测

app/src/main/java/hunnu/sj/raise_money/DataBase/UserService.java

@@ -17,24 +17,24 @@ public class UserService {
         conn = db.getConnection();
         Statement sttmt = null;
         try{
-            sttmt = conn.createStatement();//SAD
+            sttmt = conn.createStatement();
             String sql = "select * from user where username = '"+username+"'";
             PreparedStatement ps = conn.prepareStatement(sql);
             ResultSet rs1 = ps.executeQuery();
             boolean flag1 = rs1.next();
             if(!flag1){
                 sttmt.close();
-                return 0;
+                return 0;       //当用户名不存在时返回0
             }
             ResultSet rs2 = sttmt.executeQuery("select * from user where username = '"+username+"'&&password = '"+password+"'");
             boolean flag2 = rs2.next();
             if(!flag2){
                 rs2.close();
                 sttmt.close();
-                return 1;
+                return 1;   //当用户名存在，密码错误时返回1
             }
             sttmt.close();
-            return 2;
+            return 2;       //都正确时，返回2
         }catch (Exception e){
             e.printStackTrace();
         }

app/src/main/java/hunnu/sj/raise_money/RegiteActivity.java

@@ -80,14 +80,14 @@ public class RegiteActivity extends AppCompatActivity {
                 message.what = 1;
                 message.obj = "请输入密码";
                 rHandler.sendMessage(message);
-            }
-            if(!password.equals(repassword)){
+            }else if(!password.equals(repassword)){
                 message.what = 2;
                 message.obj = "密码验证错误";
                 rHandler.sendMessage(message);
-            }else if(uService.login(username,password)==1){
+            }else if(uService.login(username,password)!=0){
                 message.what = 3;
                 message.obj = "用户已存在";
+                rHandler.sendMessage(message);
             }else{
                 User user = new User();
                 user.setName(username);