启用禁用员工
Controller
路径参数前面加上@Path~注解来获取参数
@PostMapping("/status/{status}")
@ApiOperation("启用禁用员工")
public Result StartOrStop(@PathVariable("status") Integer status, Long id){
log.info("启用禁用");
employeeService.StartOrStop(status,id);
return Result.success();
}
Service
创建一个完整的类方便mapper插入数据.用于层之间交换数据方便
使用builder需要加上@builder注解在原类上,然后可以通过以下方式快速构建对象
@Override
public void StartOrStop(Integer status, Long id) {
Employee employee = Employee.builder().status(status).id(id).build();
employeeMapper.update(employee);
}
Mapper
使用动态sql
id="update"意思是将这段sql代码取名为update,这样以后可以直接以这个名字来调用
parameterType="Employee"是指明,这个sql的传入参数是Emp格式,下面set的参数都会从中获取
使用<if>标签也可以防止sql注入
<update id="update" parameterType="Employee">
update employee
<set>
<if test ="name != null">name = #{name},</if>
</set
>
where id = #{id}
</update>
员工分页查询
Controller
使用Dto类方便前端页面传入的数据和Controller层交互
返回值使用Result.success中,可以返回Object类型的方法直接返回结果
pageResult类含有: 数据条数/数据集合
@GetMapping("/page")
@ApiOperation("员工分页查询")
public Result<PageResult> page(EmployeePageQueryDTO employeePageQueryDTO){
log.info("员工分页查询,参数为{}",employeePageQueryDTO);
PageResult pageResult = employeeService.pageQuery(employeePageQueryDTO);
return Result.success(pageResult);
}
Service
使用分页查询插件(PageHelper),传入页码和每页记录数
这里的page<>中填入你的查询类,page是插件中自带的类,可以从中获取总记录数和结果,再封装到PageResult返回
@Override
public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO)
{
PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
long total = page.getTotal();
List<Employee> records = page.getResult();
return new PageResult(total,records);
}
}
Mapper
resultType规定了数据结果的格式
<select id="pageQuery" resultType="com.sky.entity.Employee">
select * from employee
<where>
<if test="name != null and name !=''">
and name like concat('%',#{name},'%')
</if>
</where>
</select>
编辑员工
Controller
路径参数使用@PathVariable来接收
@GetMapping("/{id}")
@ApiOperation("查询员工信息")
public Result<Employee> select(@PathVariable Long id){
log.info("查询员工信息");
Employee employee = employeeService.select(id);
return Result.success(employee);
}
@PutMapping
@ApiOperation("修改员工")
public Result update(@RequestBody EmployeeDTO employeeDTO){
log.info("修改员工");
employeeService.update(employeeDTO);
return Result.success();
}
Service
update此时使用的是employee而非DTO,这时候需要用到对象拷贝
BeanUtils.copyProperties(employeeDTO,employee);
new一个employee, 然后把属性拷贝到里面去
@Override
public Employee select(Long id) {
return employeeMapper.select(id);
}
@Override
public void update(EmployeeDTO employeeDTO) {
Employee employee = new Employee();
BeanUtils.copyProperties(employeeDTO,employee);
employeeMapper.update(employee);
}
Mapper
@Select("select * from employee where id = #{id}")
Employee select(Long id);
void update(Employee employeeDTO);
