//這是路由文件的關鍵代碼Route::group(['middleware' => ['web']], function () {  Route::get('student/index',['uses'=>'StudentController@index']);  Route::any('student/create',['uses'=>'StudentController@create']);  Route::post('student/save',['uses'=>'StudentController@save']);  Route::any('student/update/{id}',['uses'=>'StudentController@update']);  Route::any('student/detail/{id}',['uses'=>'StudentController@detail']);  Route::any('student/delete/{id}',['uses'=>'StudentController@delete']);});

//控制器文件的關鍵代碼,增刪改查class StudentController extends Controller{  //學生列表  public function index(){    $students = Student::paginate(20);    //dd($students);    return view('student.index',[      'students'=>$students,    ]);  }  //新增頁面  public function create(Request $request){    $student = new Student();    if($request->isMethod('POST')){      //1.控制器驗證      /*$this->validate($request,[        'Student.name'=>'required|min:2|max:20',        'Student.age' =>'required|integer',        'Student.sex' =>'required|integer',      ],[        'required'=>':attribute 為必填項',        'min'=>':attribute長度不符合要求',        'integer'=>':attribute必須為整數',      ],[        'Student.name'=>'姓名',        'Student.age' =>'年齡',        'Student.sex' =>'性別'      ]);*/      //2.Validator類驗證      $validator = /Validator::make($request->input(),[        'Student.name'=>'required|min:2|max:20',        'Student.age' =>'required|integer',        'Student.sex' =>'required|integer',      ],[        'required'=>':attribute 為必填項',        'min'=>':attribute長度不符合要求',        'integer'=>':attribute必須為整數',      ],[        'Student.name'=>'姓名',        'Student.age' =>'年齡',        'Student.sex' =>'性別'      ]);      //withInput保持數據      if($validator->fails()){        return redirect()->back()->withErrors($validator)->withInput();      }      $data = $request->input('Student');      if(Student::create($data)){        return redirect('student/index')->with('success','添加成功');      }else{        return redirect()->back();      }    }    return view('student.create',[      'student'=>$student,    ]);  }  //保存數據操作  public function save(Request $request){    $data = $request->input('Student');    $student = new Student();    $student->name = $data['name'];    $student->age = $data['age'];    $student->sex = $data['sex'];    if($student->save()){      return redirect('student/index');    }else{      return redirect()->back();    }  }  //更新數據操作  public function update(Request $request,$id){    $student = Student::find($id);    if($request->isMethod('POST')){      //Validator類驗證      $validator = /Validator::make($request->input(),[        'Student.name'=>'required|min:2|max:20',        'Student.age' =>'required|integer',        'Student.sex' =>'required|integer',      ],[        'required'=>':attribute 為必填項',        'min'=>':attribute長度不符合要求',        'integer'=>':attribute必須為整數',      ],[        'Student.name'=>'姓名',        'Student.age' =>'年齡',        'Student.sex' =>'性別'      ]);      //withInput保持數據      if($validator->fails()){        return redirect()->back()->withErrors($validator)->withInput();      }      $data = $request->input('Student');      $student->name = $data['name'];      $student->age = $data['age'];      $student->sex = $data['sex'];      if($student->save()){        return redirect('student/index')->with('success','修改成功-'.$id);      }    }    return view('student.update',[      'student'=>$student,    ]);  }  //信息詳情  public function detail($id){    $student = Student::find($id);    return view('student.detail',[      'student'=>$student,    ]);  }  //刪除操作  public function delete($id){    $student = Student::find($id);    if($student->delete()){      return redirect('student/index')->with('success','刪除成功-'.$id);    }else{      return redirect('student/index')->with('error','刪除失敗-'.$id);    }  }}