8.RESTful案例

一：准备工作

和传统 CRUD 一样，实现对员工信息的增删改查。

①搭建环境

添加相关依赖

web.xml

springmvc.xml

②准备实体类

public class Employee {
    private Integer id;
    private String lastName;
    private String email;
    //1 male, 0 female
    private Integer gender;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getLastName() {
        return lastName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public Integer getGender() {
        return gender;
    }
    public void setGender(Integer gender) {
        this.gender = gender;
    }
    public Employee(Integer id, String lastName, String email, Integer
            gender) {
        super();
        this.id = id;
        this.lastName = lastName;
        this.email = email;
        this.gender = gender;
    }
    public Employee() {
    }
}

 ③准备dao模拟数据

@Repository
public class EmployeeDao {
    private static Map employees = null;
 
    static {
        employees = new HashMap();
        employees.put(1001, new Employee(1001, "E-AA", "aa@163.com", 1));
        employees.put(1002, new Employee(1002, "E-BB", "bb@163.com", 1));
        employees.put(1003, new Employee(1003, "E-CC", "cc@163.com", 0));
        employees.put(1004, new Employee(1004, "E-DD", "dd@163.com", 0));
        employees.put(1005, new Employee(1005, "E-EE", "ee@163.com", 1));
    }
    private static Integer initId = 1006;
 
    public void save(Employee employee) {
        if (employee.getId() == null) {
            employee.setId(initId++);
        }
        employees.put(employee.getId(), employee);
    }
    public Collection getAll() {
        return employees.values();
    }
    public Employee get(Integer id) {
        return employees.get(id);
    }
    public void delete(Integer id) {
        employees.remove(id);
    }
}

二：功能清单 

功能                                     URL地址                       请求方式

访问首页√                             /                                    GET

查询全部数据√                      /                                   employee GET

删除√                                    /                                   employee/2 DELETE

跳转到添加数据页面√           /                                   toAdd GET

执行保存√                             /                                   employee POST

跳转到更新数据页面√           /                                  employee/2 GET

执行更新√                             /