在Javaweb项目中用MVC模式进行后端管理员RSA加密登录的具体代码实现，要求使用MySQL数据库，利用ajax接口请求

以下是一个简单的示例代码：

1. Model层

public class AdminModel {
    private String username;
    private String password;

    public AdminModel(String username, String password) {
        this.username = username;
        this.password = password;
    }

    public String getUsername() {
        return username;
    }

    public String getPassword() {
        return password;
    }
}

2. View层

<form id="loginForm">
    <label>Username:</label>
    <input type="text" name="username"><br>
    <label>Password:</label>
    <input type="password" name="password"><br>
    <input type="submit" value="Login">
</form>

<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
    $(document).ready(function() {
        $('#loginForm').submit(function(event) {
            event.preventDefault();
            var formData = $(this).serialize();
            $.ajax({
                type: 'POST',
                url: '/admin/login',
                data: formData,
                success: function(response) {
                    if (response.status == 'success') {
                        alert('Login successful!');
                    } else {
                        alert('Login failed!');
                    }
                },
                error: function() {
                    alert('An error occurred!');
                }
            });
        });
    });
</script>

3. Controller层

public class AdminController {
    @PostMapping("/admin/login")
    @ResponseBody
    public Map<String, String> login(@RequestParam("username") String username, 
                                      @RequestParam("password") String password) {
        // 从数据库中查询该管理员的公钥
        String publicKey = getPublicKeyFromDatabase(username);
        // 使用公钥加密密码
        String encryptedPassword = RSAUtils.encrypt(password, publicKey);
        // 生成Model对象
        AdminModel admin = new AdminModel(username, encryptedPassword);
        // 将Model对象保存到数据库中
        saveAdminToDatabase(admin);
        // 返回成功信息
        Map<String, String> response = new HashMap<>();
        response.put("status", "success");
        return response;
    }

    private String getPublicKeyFromDatabase(String username) {
        // 从数据库中查询该管理员的公钥
        // ...
        return publicKey;
    }

    private void saveAdminToDatabase(AdminModel admin) {
        // 将Model对象保存到数据库中
        // ...
    }
}