教你SpringMVC RESTFul实体类创建及环境搭建

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新建一个 module 模块，创建 maven 工程，步骤跟以前一样，各种配置文件内容也可以拷贝修改一下即可。

新建个 bean 包，创建实体类 Employee：

package com.pingguo.rest.bean;
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() {}
}

新建一个 dao 包，创建 EmployeeDao 类，这里不使用数据库，直接存放一些静态数据：

@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);
    }
}

dao 中实现了几个增删改查的操作，代替与数据库的交互：

controller 包下新建 EmployeeController 类：

@Controller
public class EmployeeController {
    @Autowired
    private EmployeeDao employeeDao;
}

接下来就可以一个个的实现功能了，大概有：

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