From 662b13171c246237afcccdc896f60b886120bc3e Mon Sep 17 00:00:00 2001
From: zhenghaoyuan20 <735827001@qq.com>
Date: Tue, 20 Jun 2023 18:02:08 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E7=94=A8=E6=88=B7=E5=90=8D?=
 =?UTF-8?q?=E5=92=8C=E5=AF=86=E7=A0=81=E5=90=88=E6=B3=95=E5=88=A4=E6=96=AD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 .../com/example/sixaunyi/LoginActivity.java   | 41 ++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

diff --git a/src/sixaunyi/app/src/main/java/com/example/sixaunyi/LoginActivity.java b/src/sixaunyi/app/src/main/java/com/example/sixaunyi/LoginActivity.java
index 7531f91..5f6292d 100644
--- a/src/sixaunyi/app/src/main/java/com/example/sixaunyi/LoginActivity.java
+++ b/src/sixaunyi/app/src/main/java/com/example/sixaunyi/LoginActivity.java
@@ -1,5 +1,4 @@
 package com.example.sixaunyi;
-import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.widget.Button;
@@ -30,6 +29,7 @@ public class LoginActivity extends AppCompatActivity {
         mLoginButton = findViewById(R.id.login);
         // 设置登录按钮的点击事件
         mLoginButton.setOnClickListener(v -> {
+
             attemptLogin();
         });
     }
@@ -37,6 +37,12 @@ public class LoginActivity extends AppCompatActivity {
         String username = mUsername.getText().toString();
         String password = mPassword.getText().toString();
         boolean if_correct = verifyUser(username,password);
+        if (!isInputUsernameValid(username)){
+            Toast.makeText(this, "用户名非法", Toast.LENGTH_SHORT).show();
+        }
+        if (!isInputPasswordValid(password)){
+            Toast.makeText(this, "密码非法", Toast.LENGTH_SHORT).show();
+        }
         if (if_correct) {
             Toast.makeText(this, "登录成功", Toast.LENGTH_SHORT).show();
             Intent intent = new Intent(LoginActivity.this, MainActivity.class);
@@ -54,4 +60,37 @@ public class LoginActivity extends AppCompatActivity {
             return false;
         }
     }
+    private boolean isInputUsernameValid(String username){
+        if (!username.isEmpty()) { // 判断用户名是否为空
+            String regex = "^[A-Za-z0-9]+$"; // 合法字符集：大小写字母、数字
+            boolean isValid = username.matches(regex); // 判断用户名是否合法
+            if (isValid) {
+                // 用户名合法，执行操作
+                return true;
+            } else {
+                // 用户名包含非法字符，提示用户
+                return false;
+            }
+        } else {
+            // 用户名为空，提示用户
+            return false;
+        }
+    }
+    private boolean isInputPasswordValid(String password){
+        if (!password.isEmpty()) { // 判断密码是否为空
+            String regex = "^[A-Za-z0-9]+$"; // 合法字符集：大小写字母、数字
+            boolean isValid = password.matches(regex); // 判断密码是否合法
+
+            if (isValid) {
+                // 密码合法，执行操作
+                return true;
+            } else {
+                // 密码包含非法字符，提示用户
+                return false;
+            }
+        } else {
+            // 用户名为空，提示用户
+            return false;
+        }
+    }
 }