SpringMVC使用案例分享

@Controller
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    @GetMapping
    public ResponseEntity> getAllEmployees() {
        List employees = employeeService.getAllEmployees();
        return new ResponseEntity<>(employees, HttpStatus.OK);
    }

    @GetMapping("/{id}")
    public ResponseEntity getEmployeeById(@PathVariable("id") long id) {
        Employee employee = employeeService.getEmployeeById(id);
        if (employee != null) {
            return new ResponseEntity<>(employee, HttpStatus.OK);
        } else {
            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }
    }

    @PostMapping
    public ResponseEntity createEmployee(@RequestBody Employee employee) {
        Employee createdEmployee = employeeService.createEmployee(employee);
        return new ResponseEntity<>(createdEmployee, HttpStatus.CREATED);
    }

    @PutMapping("/{id}")
    public ResponseEntity updateEmployee(@PathVariable("id") long id, @RequestBody Employee employee) {
        Employee updatedEmployee = employeeService.updateEmployee(id, employee);
        if (updatedEmployee != null) {
            return new ResponseEntity<>(updatedEmployee, HttpStatus.OK);
        } else {
            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }
    }

    @DeleteMapping("/{id}")
    public ResponseEntity deleteEmployee(@PathVariable("id") long id) {
        boolean deleted = employeeService.deleteEmployee(id);
        if (deleted) {
            return new ResponseEntity<>(HttpStatus.NO_CONTENT);
        } else {
            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }
    }
}

该案例展示了如何使用SpringMVC构建一个基本的员工管理系统接口。通过使用@Controller注解，我们定义了处理员工相关请求的控制器类EmployeeController。

在该控制器类中，我们使用@Autowired注解自动注入了EmployeeService，来处理与员工相关的业务逻辑。

通过使用@GetMapping注解，我们定义了用于获取所有员工、按照员工ID获取员工以及创建员工的方法。

同样地，@PutMapping注解用于更新员工信息，@DeleteMapping注解用于删除员工信息。

在每个方法的实现中，我们调用了EmployeeService中的相应方法来处理员工的业务逻辑，并根据处理结果返回不同的HTTP状态码和响应体。

通过这个案例，我们可以初步了解如何使用SpringMVC构建一个简单的RESTful风格的接口，并实现员工管理的相关操作。