ssm项目之删除员工

删除可以分为单个删除和批量删除

一、单个删除

employeeController.java

/**
     * 删除员工
     * @param id
     * @return
     */
    @ResponseBody
    @RequestMapping(value="/emp/{id}", method=RequestMethod.DELETE)
    public Msg deleteEmpById(@PathVariable("id")Integer id) {
        //Integer id = Integer.parseInt(id);
        employeeService.deleteEmp(id);
        return Msg.success();
    }

employeeService.java

/**
     * 员工删除
     * @param id
     */
    public void deleteEmp(Integer id) {
        employeeMapper.deleteByPrimaryKey(id);

    }

index.jsp

//单个删除
    $(document).on("click",".delete_btn", function(){
        //1、弹出确认删除对话框
        var empName = $(this).parents("tr").find("td:eq(2)").text();
        var empId = $(this).attr("del-id");
        if(confirm("确认删除【" + empName + "】吗?")) {
            //确认，发送 Ajax
            $.ajax({
                url: "${APP_PATH}/emp/" + empId,
                type: "DELETE",
                success: function(result) {
                    alert(result.msg);
                    //回到本页
                    to_page(currentPage);
                }
            });
        }
    });

二、批量删除

先完成前面那个点击最上面全选全不选的功能

//完成全选全不选
    $("#check_all").click(function() {
        //prop修改和读取原生dom属性的值
        $(".check_item").prop("checked", $(this).prop("checked"));
    });

    $(document).on("click",".check_item", function() {
        var flag = $(".check_item:checked").length == $(".check_item").length;
        $("#check_all").prop("checked", flag);
    });

点击批量删除

//点击全部删除，就批量删除
    $("#emp_delete_all_btn").click(function() {
        var empNames = "";
        var del_idstr = "";
        $.each($(".check_item:checked"), function() {
            empNames += $(this).parents("tr").find("td:eq(2)").text() + ",";
            del_idstr += $(this).parents("tr").find("td:eq(1)").text() + "-";
        });
        empNames = empNames.substring(0, empNames.length - 1);
        del_idstr = del_idstr.substring(0, del_idstr.length - 1);
        if(confirm("确认删除【" + empNames + "】吗?")) {
            $.ajax({
                url:"${APP_PATH}/emp/" + del_idstr,
                type:"DELETE",
                success:function(result) {
                    alert(result.msg);
                    to_page(currentPage);
                }
            });
        }
    });

批量删除的直接用横杠拼接起来，单个删除和批量删除放在一起处理

EmployeeController.java

/**
     * 单个或批量删除员工
     * @param id
     * @return
     */
    @ResponseBody
    @RequestMapping(value="/emp/{ids}", method=RequestMethod.DELETE)
    public Msg deleteEmpById(@PathVariable("ids")String ids) {
        //批量删除
        if(ids.contains("-")) {
            List<Integer> del_ids = new ArrayList<>();
            String[] str_ids = ids.split("-");
            for(String string : str_ids) {
                del_ids.add(Integer.parseInt(string));
            }
            employeeService.deleteBatch(del_ids);
        } else {
            //单个删除
            Integer id = Integer.parseInt(ids);
            employeeService.deleteEmp(id);
        }

        return Msg.success();
    }

EmployeeService.java

/**
     * 员工单个删除
     * @param id
     */
    public void deleteEmp(Integer id) {
        employeeMapper.deleteByPrimaryKey(id);

    }
    /**
     * 批量删除
     * @param ids
     */
    public void deleteBatch(List<Integer> ids) {
        EmployeeExample example = new EmployeeExample();
        Criteria criteria = example.createCriteria();
        //delete from xxxx where emp_id in (1,2,3)
        criteria.andEmpIdIn(ids);
        employeeMapper.deleteByExample(example);

    }

测试

单个

批量

这样CRUD就做完了，不过Controller里的一些逻辑啥的最好放在Service层，毕竟Service层才是主要写逻辑的，反正怎么顺手怎么来吧