@AuditAction(requestName = "导出全部人员信息") @PostMapping(value = "/exportall/cadre") public ResponseEntity<byte[]> exportAllCadre(@RequestBody Map<String, String> map, HttpServletRequest request, CadreQuery queryParams) { HashMap<String, String[]> requestParams = new HashMap<>(); requestParams.putAll(request.getParameterMap()); requestParams.put("transferSituation", new String[] {"0"}); JPAPage<Cadre> findPage = cadreService.findPage(PageRequest.of(0, Integer.MAX_VALUE), queryParams); List<Cadre> cadreList = findPage.getContent(); List<CadreExportVO> excelData = new ArrayList<CadreExportVO>(); if(cadreList != null){ for(Cadre cadre : cadreList){ CadreExportVO vo = CadreExportVO.make(cadre,null); excelData.add(vo); } } byte[] byteArray = EasyExcelUtil.writeDataToByteArray(excelData, CadreExportVO.class); return ResponseEntityUtil.downloadFile(byteArray, FileNameUtil.generateFileName("人员信息")); }

这段代码是一个Java Spring Boot的Controller，处理POST请求，路径为"/exportall/cadre"，用于导出全部人员信息。它从request获取参数，然后通过调用cadreService的findPage方法查询所有人员信息，并将查询结果转换成excelData列表，最后使用EasyExcelUtil将excelData转换为字节数组。最终返回一个ResponseEntity对象，其中包含了导出的excel文件的字节数组和文件名。

相关问题

#include <bits/stdc++.h> using namespace std; class Student { protected: string name_; bool sex_; int grade_; Student next; public: Student(string name, bool sex, int grade):name(name), sex(sex),grade(grade) { cout<<"A student named by "<<name<<" is created!"<<endl; } ~Student() { cout<<"A student named by "<<name<<" is erased."<<endl; } void showInfo() { cout<<"name = "<<name<<", sex = " <<sex_<<", grade = "<<grade_<<";"; } Student getNext() { return next; } void setNext(Student* s) { next=s; } }; class StudentCadre:public Student { protected: string position_; public: StudentCadre(string name, bool sex, int grade, string pos) :Student(name,sex,grade),position(pos) { cout<<"A student cadre with position "<<position<<" is created."<<endl; } ~StudentCadre(){cout<<"A student named by "<<name<<" is erased."<<endl;} void showInfo() { cout<<"name = "<<name<<", sex = " <<sex<<", grade = "<<grade<<"; position = "<<position_<<"."; } }; int main() { int num; string name, position; bool sex; int grade; Student *header, *student, curStudent; cin>>name>>sex>>grade>>position; header = new StudentCadre(name, sex, grade,position); curStudent = header; cin>>num; for (int i = 0; i < num; i++) { cin>>name>>sex>>grade; student = new Student(name, sex, grade); curStudent -> setNext(student); curStudent = curStudent -> getNext(); } ((StudentCadre)header) -> showInfo(); cout<<endl; curStudent = header; while (curStudent -> getNext() != NULL) { curStudent = curStudent -> getNext(); curStudent->showInfo(); cout<<endl; } curStudent = header; while (curStudent != NULL) { student = curStudent; curStudent = curStudent -> getNext(); delete student; } return 0; }这段代码有什么问题

这段代码存在以下问题：

1. 在 `Student` 类中，`next` 成员变量应该是一个指向 `Student` 类型的指针，而不是 `Student` 类型本身。正确的定义应该是 `Student *next;`。
2. 在 `StudentCadre` 类中，构造函数中应该调用父类 `Student` 的构造函数，而不是尝试重新定义 `name`、`sex` 和 `grade`。正确的调用方式应该是 `Student(name, sex, grade)`。
3. 在 `StudentCadre` 类中，构造函数中应该将 `pos` 赋值给成员变量 `position_`，而不是 `position`。正确的赋值语句应该是 `position_ = pos;`。
4. 在 `main` 函数中，声明 `curStudent` 时应该是 `Student *curStudent;`，而不是 `Student curStudent;`。同时，由于 `header` 是一个指向 `Student` 类型的指针，因此在调用 `showInfo()` 函数时需要进行类型转换，即 `(StudentCadre *)header->showInfo();`。
5. 在 `main` 函数中，最后删除链表时，应该先将 `header` 的下一个节点保存下来，再删除 `header`，然后将下一个节点作为新的 `header`，直到链表为空。正确的删除链表的代码应该是：

curStudent = header;
while (curStudent != NULL) {
    student = curStudent;
    curStudent = curStudent->getNext();
    delete student;
}

以上是我发现的问题，希望对你有帮助。

优化#include<iostream>using namespace std;class Teacher{protected: string name; int age; char gender; string address; string phone; string title;public: void display(){ cout<<"Name: "<<name<<endl; cout<<"Age: "<<age<<endl; cout<<"Gender: "<<gender<<endl; cout<<"Address: "<<address<<endl; cout<<"Phone: "<<phone<<endl; cout<<"Title: "<<title<<endl; }};class Cadre{protected: string name; int age; char gender; string address; string phone; string post;public: void display(){ cout<<"Name: "<<name<<endl; cout<<"Age: "<<age<<endl; cout<<"Gender: "<<gender<<endl; cout<<"Address: "<<address<<endl; cout<<"Phone: "<<phone<<endl; cout<<"Post: "<<post<<endl; }};class Teacher_Cadre:public Teacher, public Cadre{private: double wages;public: void show(){ Teacher::display(); cout<<"Post: "<<Cadre::post<<endl; cout<<"Wages: "<<wages<<endl; }};int main(){ Teacher_Cadre tc; tc.name="Tom"; tc.age=30; tc.gender='M'; tc.address="Beijing"; tc.phone="123456789"; tc.title="Professor"; tc.post="Manager"; tc.wages=10000; tc.show(); return 0;}

代码本身没有什么问题，但是可以优化一下：

1. 在 Teacher 和 Cadre 类中，有很多重复的属性和方法，可以抽象出一个基类来，减少冗余代码。

2. 在 Teacher 和 Cadre 类中，属性和方法都是 protected 的，可以将它们改为 private ，并添加相应的访问函数（如 getName()、getAge() 等）。

3. 可以使用构造函数来对对象进行初始化，避免在 main 函数中逐个赋值。

优化后的代码如下：

#include <iostream>
#include <string>
using namespace std;

class Person {
protected:
    string name;
    int age;
    char gender;
    string address;
    string phone;
public:
    Person(string n, int a, char g, string addr, string ph) : name(n), age(a), gender(g), address(addr), phone(ph) {}
    string getName() { return name; }
    int getAge() { return age; }
    char getGender() { return gender; }
    string getAddress() { return address; }
    string getPhone() { return phone; }
};

class Teacher : public Person {
private:
    string title;
public:
    Teacher(string n, int a, char g, string addr, string ph, string t) : Person(n, a, g, addr, ph), title(t) {}
    string getTitle() { return title; }
    void display() {
        cout << "Name: " << name << endl;
        cout << "Age: " << age << endl;
        cout << "Gender: " << gender << endl;
        cout << "Address: " << address << endl;
        cout << "Phone: " << phone << endl;
        cout << "Title: " << title << endl;
    }
};

class Cadre : public Person {
private:
    string post;
public:
    Cadre(string n, int a, char g, string addr, string ph, string p) : Person(n, a, g, addr, ph), post(p) {}
    string getPost() { return post; }
    void display() {
        cout << "Name: " << name << endl;
        cout << "Age: " << age << endl;
        cout << "Gender: " << gender << endl;
        cout << "Address: " << address << endl;
        cout << "Phone: " << phone << endl;
        cout << "Post: " << post << endl;
    }
};

class Teacher_Cadre : public Teacher, public Cadre {
private:
    double wages;
public:
    Teacher_Cadre(string n, int a, char g, string addr, string ph, string t, string p, double w) : Teacher(n, a, g, addr, ph, t), Cadre(n, a, g, addr, ph, p), wages(w) {}
    void show() {
        Teacher::display();
        cout << "Post: " << Cadre::post << endl;
        cout << "Wages: " << wages << endl;
    }
};

int main() {
    Teacher_Cadre tc("Tom", 30, 'M', "Beijing", "123456789", "Professor", "Manager", 10000);
    tc.show();
    return 0;
}