SSM实现批量删除功能

批量删除功能的实现

其实实现这个功能还是挺简单的 因为我这是直接拼接的，所以用了DOM方法来获取id
话不多说直接上代码
首先是复选框全选和反选
这里的话

获取最上面一个复选框的状态同步到拼接的复选框

 $("#check11").click(function () { var hz = $("#check11").prop("checked"); $(".qx").prop('checked',hz); }); 

直接看checkbox就好

    $.ajax({
                 url: "/reader",
                 type: "get",
                 dataType: "json",
                 success:function (result) {
                     var dataTR = "";
                     $.each(result, function (index, value) {
                         dataTR +=
                             "<tr>" +
                             "<td>" + value.readerId + "</td>" +
                             "<td>" + value.name + "</td>" +
                             "<td>" + value.sex + "</td>" +
                             "<td>" + value.birth + "</td>" +
                             "<td>" + value.address + "</td>" +
                             "<td>" + value.telcode + "</td>" +
                             "<td>" +
                             "<input type='checkbox' class='qx'> " +
                             "</td>" +
                             "</tr>";
                     });
                     $("#tbody").html(dataTR);
                 }
             });

下面是ajax请求

 $("#delete").click(function () {
             var zhi = $('input:checkbox:checked');
             var id = '';
             var str = '';
             $.each(zhi,function(){
               id = this.parentNode.parentNode.firstChild.innerHTML;
                             if(id!=null){
                                 str += id+",";
                             }
                 swal({
                    title:"确定要删除这"+zhi.length+'个数据吗',
                     showCancelButton: true,
                     confirmButtonColor: "#DD6B55",
                     confirmButtonText: "确定！",
                     cancelButtonText: "取消！",
                     closeOnConfirm: false,
                     closeOnCancel: false
                 },function (isConfirm) {
                      var s = JSON.stringify(str);
                      console.log(s);
                     if(isConfirm){
                         $.ajax({
                            url:"/reader1",
                             type:"post",
                             dataType: "json",
                             data:{"str":s},
                             success:function (result) {
                                 if(result=="success"){
                                     swal('删除成功','','success');
                                     getAll();
                                 }else {
                                swal("取消！", "停留在此页面", "info");
                                 }
                             }
                         });
                     }else {
                         swal("取消！", ", "info");
                     }
                 });
             });
         });

这里注意var定义一定要放在each方法的外部并且要给赋值’ ';不然的话JSON转换成字符串的时候会
为空

dao层

  int deleteByPrimaryKey(Integer readerId); 

Mapper

 <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer"> delete from reader_info where reader_id = #{readerId,jdbcType=INTEGER} </delete> 

service层

int deleteByPrimaryKey(Integer readerId);

impl

 package gentleman.service;

 import gentleman.bean.User;
 import gentleman.dao.Userdao;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;

 import java.util.List;

 @Service
 @Transactional
 public class serviceimpl implements UserService {

     @Autowired
     private Userdao userdao;

     @Override
     public void deleteUserById(int id) throws Exception {
         userdao.deleteUserById(id);
     }
 }

Controller层

 package gentleman.Controller;

 import com.alibaba.fastjson.JSON;
 import gentleman.service.reader_infoservice;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseBody;

 @Controller
 public class CountDown {
         @Autowired
         private reader_infoservice reader;

     @RequestMapping("/reader1")
     @ResponseBody
     public String deleteByPrimaryKey(String str){
         String substring = str.substring(1,str.length()-1);
         String[] split = substring.split(",");
         try {
             for (int i = 0; i < split.length; i++) {
                  reader.deleteByPrimaryKey(Integer.parseInt(split[i]));
             }
              return JSON.toJSONString("success");
         } catch (NumberFormatException e) {
             e.printStackTrace();
             return JSON.toJSONString("fail");
         }
     }
 }

这里需要注意的就是JSON传过来的字符串是"id,id,id"的形式，如果想转成int类型
需要先把第一个位置和最后一个位置上的双引号去掉；