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Service 层实现
一、实验介绍
1.1 实验内容
本节课程主要利用 Spring 框架实现 Service 层。
1.2 实验知识点
- Spring 框架
1.3 实验环境
- JDK1.8
- Eclipse JavaEE
二、实验步骤
在项目 hrms
的目录 src/main/java
下新建包 com.shiyanlou.service
,作为 Servcie 层接口的包,新建包 com.shiyanlou.service.impl
作为 Servcie 层实现的包。
2.1 AdminService 接口与实现
在包 com.shiyanlou.service
下建一个 AdminService.java
接口文件,代码如下:
package com.shiyanlou.service;
import java.util.List;
import java.util.Map;
import com.shiyanlou.domain.Admin;
public interface AdminService {
/** 登录
*
* @param admin
* @return
*/
public Admin login(Admin admin);
/** 根据条件查询管理员
*
* @param map
* @return
*/
public List<Admin> findAdmins(Map<String, Object> map);
/** 根据条件查询管理员人数
*
* @param map
* @return
*/
public Integer getCount(Map<String, Object> map);
/** 添加管理员
*
* @param admin
* @return
*/
public Integer addAdmin(Admin admin);
/** 修改管理员
*
* @param admin
* @return
*/
public Integer updateAdmin(Admin admin);
/** 删除管理员
*
* @param id
* @return
*/
public Integer deleteAdmin(Integer id);
}
在包 com.shiyanlou.service.impl
下建一个类 AdminServiceImpl
实现上述的接口,代码如下:
package com.shiyanlou.service.impl;
import java.util.List;
import java.util.Map;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.shiyanlou.dao.AdminDao;
import com.shiyanlou.domain.Admin;
import com.shiyanlou.service.AdminService;
@Service("adminService")
public class AdminServiceImpl implements AdminService {
// 自动注入 DAO 对象
@Resource
private AdminDao adminDao;
// 实现接口中的方法
@Override
public Admin login(Admin admin) {
return adminDao.login(admin);
}
@Override
public List<Admin> findAdmins(Map<String, Object> map) {
return adminDao.findAdmins(map);
}
@Override
public Integer getCount(Map<String, Object> map) {
return adminDao.getCount(map);
}
@Override
public Integer addAdmin(Admin admin) {
return adminDao.addAdmin(admin);
}
@Override
public Integer updateAdmin(Admin admin) {
return adminDao.updateAdmin(admin);
}
@Override
public Integer deleteAdmin(Integer id) {
return adminDao.deleteAdmin(id);
}
}
2.2 PostService 接口与实现
在包 com.shiyanlou.service
下建一个 PostService.java
接口文件,代码如下:
package com.shiyanlou.service;
import java.util.List;
import java.util.Map;
import com.shiyanlou.domain.Post;
public interface PostService {
/** 根据条件查询公告
*
* @param map
* @return
*/
public List<Post>findPosts(Map<String, Object> map);
/** 根据条件查询公告数量
*
* @param map
* @return
*/
public Integer getCount(Map<String, Object> map);
/** 添加公告
*
* @param post
* @return
*/
public Integer addPost(Post post);
/** 修改公告
*
* @param post
* @return
*/
public Integer updatePost(Post post);
/** 删除公告
*
* @param id
* @return
*/
public Integer deletePost(Integer id);
/** 根据 ID 查询公告信息
*
* @param id
* @return
*/
public Post getPostById(Integer id);
}
在包 com.shiyanlou.service.impl
下建一个类 PostServiceImpl
实现上述的接口,代码如下:
package com.shiyanlou.service.impl;
import java.util.List;
import java.util.Map;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.shiyanlou.dao.PostDao;
import com.shiyanlou.domain.Post;
import com.shiyanlou.service.PostService;
@Service("postService")
public class PostServiceImpl implements PostService {
// 自动注入 DAO 对象
@Resource
private PostDao postDao;
// 实现接口中的方法
@Override
public List<Post> findPosts(Map<String, Object> map) {
return postDao.findPosts(map);
}
@Override
public Integer getCount(Map<String, Object> map) {
return postDao.getCount(map);
}
@Override
public Integer addPost(Post post) {
return postDao.addPost(post);
}
@Override
public Integer updatePost(Post post) {
return postDao.updatePost(post);
}
@Override
public Integer deletePost(Integer id) {
return postDao.deletePost(id);
}
@Override
public Post getPostById(Integer id) {
return postDao.getPostById(id);
}
}
2.3 DepartmentService 接口与实现
在包 com.shiyanlou.service
下建一个 DepartmentService.java
接口文件,代码如下:
package com.shiyanlou.service;
import java.util.List;
import java.util.Map;
import com.shiyanlou.domain.Department;
public interface DepartmentService {
/** 根据条件查询部门
*
* @param map
* @return
*/
public List<Department> findDepartments(Map<String, Object> map);
/** 根据条件查询部门数量
*
* @param map
* @return
*/
public Integer getCount(Map<String, Object> map);
/** 添加部门
*
* @param department
* @return
*/
public Integer addDepartment(Department department);
/** 修改部门
*
* @param department
* @return
*/
public Integer updateDepartment(Department department);
/** 删除部门
*
* @param id
* @return
*/
public Integer deleteDepartment(Integer id);
}
在包 com.shiyanlou.service.impl
下建一个类 DepartmentServiceImpl
实现上述的接口,代码如下:
package com.shiyanlou.service.impl;
import java.util.List;
import java.util.Map;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.shiyanlou.dao.DepartmentDao;
import com.shiyanlou.domain.Department;
import com.shiyanlou.service.DepartmentService;
@Service("departmentService")
public class DepartmentServiceImpl implements DepartmentService {
// 自动注入 DAO 对象
@Resource
private DepartmentDao departmentDao;
// 实现接口中的方法
@Override
public List<Department> findDepartments(Map<String, Object> map) {
return departmentDao.findDepartments(map);
}
@Override
public Integer getCount(Map<String, Object> map) {
return departmentDao.getCount(map);
}
@Override
public Integer addDepartment(Department department) {
return departmentDao.addDepartment(department);
}
@Override
public Integer updateDepartment(Department department) {
return departmentDao.updateDepartment(department);
}
@Override
public Integer deleteDepartment(Integer id) {
Integer flag = null;
// 如果删除关联外键的行记录,抛出异常
try {
flag = departmentDao.deleteDepartment(id);
} catch (Exception e) {
throw new RuntimeException();
}
return flag;
}
}
2.4 PositionService 接口与实现
在包 com.shiyanlou.service
下建一个 PositionService.java
接口文件,代码如下:
package com.shiyanlou.service;
import java.util.List;
import java.util.Map;
import com.shiyanlou.domain.Position;
public interface PositionService {
/** 根据条件查询职位
*
* @param map
* @return
*/
public List<Position> findPositions(Map<String, Object> map);
/** 根据条件查询职位数量
*
* @param map
* @return
*/
public Integer getCount(Map<String, Object> map);
/** 添加职位
*
* @param position
* @return
*/
public Integer addPosition(Position position);
/* 修改职位
*
* @param position
* @return
*/
public Integer updatePosition(Position position);
/** 删除职位
*
* @param id
* @return
*/
public Integer deletePosition(Integer id);
}
在包 com.shiyanlou.service.impl
下建一个类 PositionServiceImpl
实现上述的接口,代码如下:
package com.shiyanlou.service.impl;
import java.util.List;
import java.util.Map;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.shiyanlou.dao.PositionDao;
import com.shiyanlou.domain.Position;
import com.shiyanlou.service.PositionService;
@Service("positionService")
public class PositionServiceImpl implements PositionService {
// 自动注入 DAO 对象
@Resource
private PositionDao positionDao;
// 实现接口中的方法
@Override
public List<Position> findPositions(Map<String, Object> map) {
return positionDao.findPositions(map);
}
@Override
public Integer getCount(Map<String, Object> map) {
return positionDao.getCount(map);
}
@Override
public Integer addPosition(Position position) {
return positionDao.addPosition(position);
}
@Override
public Integer updatePosition(Position position) {
return positionDao.updatePosition(position);
}
@Override
public Integer deletePosition(Integer id) {
Integer flag = null;
// 如果删除关联外键的行记录,抛出异常
try {
flag = positionDao.deletePosition(id);
} catch (Exception e) {
throw new RuntimeException();
}
return flag;
}
}
2.5 EmployeeService 接口与实现
在包 com.shiyanlou.service
下建一个 EmployeeService.java
接口文件,代码如下:
package com.shiyanlou.service;
import java.util.List;
import java.util.Map;
import com.shiyanlou.domain.Employee;
import com.shiyanlou.domain.Post;
public interface EmployeeService {
/** 根据条件查询员工
*
* @param map
* @return
*/
public List<Post>findEmployees(Map<String, Object> map);
/** 根据条件查询员工人数
*
* @param map
* @return
*/
public Integer getCount(Map<String, Object> map);
/** 添加员工
*
* @param employee
* @return
*/
public Integer addEmployee(Employee employee);
/** 修改员工
*
* @param employee
* @return
*/
public Integer updateEmployee(Employee employee);
/** 删除员工
*
* @param id
* @return
*/
public Integer deleteEmployee(String id);
}
在包 com.shiyanlou.service.impl
下建一个类 EmployeeServiceImpl
实现上述的接口,代码如下:
package com.shiyanlou.service.impl;
import java.util.List;
import java.util.Map;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.shiyanlou.dao.EmployeeDao;
import com.shiyanlou.domain.Employee;
import com.shiyanlou.domain.Post;
import com.shiyanlou.service.EmployeeService;
@Service("employeeService")
public class EmployeeServiceImpl implements EmployeeService {
// 自动注入 DAO 对象
@Resource
private EmployeeDao employeeDao;
// 实现接口中的方法
@Override
public List<Post> findEmployees(Map<String, Object> map) {
return employeeDao.findEmployees(map);
}
@Override
public Integer getCount(Map<String, Object> map) {
return employeeDao.getCount(map);
}
@Override
public Integer addEmployee(Employee employee) {
Integer flag = null;
// 如果插入记录主键重复,抛出异常
try {
flag = employeeDao.addEmployee(employee);
} catch (Exception e) {
throw new RuntimeException();
}
return flag;
}
@Override
public Integer updateEmployee(Employee employee) {
return employeeDao.updateEmployee(employee);
}
@Override
public Integer deleteEmployee(String id) {
return employeeDao.deleteEmployee(id);
}
}
三、实验总结
到这里我们就完成了 Service 层的代码实现,下一节我们将完成 MyBatis 和 Spring 的整合及测试。
Service 层实现