springboot_数据增删改查

1、员工列表展示

• thymeleaf提取公共页面
  • 提取：th:fragment="sidebar"
  • 插入：<div th:replace="~{commons/commons::sidebar}"></div>
    或者<div th:insert="~{commons/commons::sidebar}"></div>
  • 如果传递参数：使用():
    <div th:insert="~{commons/commons::sidebar(active='main.html')}"></div>
  • 接收判断：
    <a th:class="${active=='main.html'?'nav-link active':'nav-link'}" th:href="@{/index.html}">
• 列表循环展示
  • Controller返回前端数据:

    @Controller
    public class EmployeeController {
        @Autowired
        EmployeeDao employeeDao;
    
        @RequestMapping("/emps")
        public String list(Model model){
            Collection<Employee> employees = employeeDao.getAllEmployee();
            model.addAttribute("emps",employees);
            return "emp/list";
        }
    }
    

  • 遍历循环：

    <tr th:each="emp:${emps}">
        <td th:text="${emp.getId()}"></td>
        <td th:text="${emp.getLastName()}"></td>
        <td th:text="${emp.getEmail()}"></td>
        <td th:text="${emp.getGender()==0?'女':'男'}"></td>
        <td th:text="${emp.getDepartment().getDepartmentName()}"></td>
        <td th:text="${#dates.format(emp.getBirth(),'yyyy-MM-dd HH:mm:ss')}"></td>
    </tr>
    

2、添加员工

• 提交按钮

  <!-- 设置action，进入对应的controller  请求方法：post -->
  <form th:action="@{/emp}" method="post">
  

  //进入@PostMapping的controller
  @PostMapping("/emp")
  public String addEmp(Employee employee){
      System.out.println(employee);
      employeeDao.add(employee);
      return "redirect:/emps";
  }
  

• 跳转到添加页面

  <!-- 点击添加添加员工，进行页面跳转 -->
  <h2><a class="btn btn-sm btn-success" th:href="emp">添加员工</a></h2>
  

  //对应的controller，@GetMapping,此controller进行页面的跳转
  //model设置departments参数返回前端显示
  @GetMapping("/emp")
  public String toAddPage(Model model){
      Collection<Department> department = departmentDao.getDepartment();
      model.addAttribute("departments",department);
      return "emp/add";
  }
  

    <!-- 前端遍历departments进行显示 -->
    <select class="form-control" name="department.id">
        <option th:each="dept:${departments}" th:text="${dept.getDepartmentName()}" th:value="${dept.getId()}"></option>
    </select>
  

• 添加员工成功
• 返回首页

  @PostMapping("/emp")
      public String addEmp(Employee employee){
          System.out.println(employee);
          employeeDao.add(employee);
          //重定向到员工信息页面，
          return "redirect:/emps";
      }
  

  //跳转到对应这，返回list页面。
  @RequestMapping("/emps")
  public String list(Model model){
  Collection<Employee> employees = employeeDao.getAllEmployee();
  model.addAttribute("emps",employees);
  return "emp/list";
  }
  

标签：springboot,改查,employee,String,emps,增删,model,public,emp
来源： https://www.cnblogs.com/jsit-dj-it/p/14952202.html