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功能需求：实现选中一个或多个执行批量删除操作

在elementUI官网选择一个表格样式模板，Element - The world's most popular Vue UI framework

这里采用的是

将代码复制到前端，这里是index.vue

<template><el-button type="danger" plain icon="el-icon-delete" size="mini" @click="handleDeleteByBatch">删除</el-button><el-table ref="multipleTable" :data="tableData" tooltip-effect="dark" style="width: 100%"@selection-change="handleSelectionChange"><el-table-column type="selection" width="55"></el-table-column><el-table-column label="日期" width="120"><template slot-scope="scope">{{ scope.row.date }}</template></el-table-column><el-table-column prop="name" label="姓名" width="120"></el-table-column><el-table-column prop="address" label="地址" show-overflow-tooltip></el-table-column></el-table>
</template>
<script>export default {data() {return {//表格数据tableData: [],//多选idsmultipleSelection: []}},methods: {handleSelectionChange(row) {this.multipleSelection = row;}}}
</script>

添加删除方法

1.script处导入后端执行删除方法的文件a.js（位于api/student文件夹下）

<script>
import { deleteByBatch } from '@/api/student/a'
</script>

2.a.js

import request from '@/utils/request'// 批量删除
export function deleteByBatch(ids) {return request({url: '/student/deleteByBatch/'+ids,method: 'delete'})
}

3.添加删除方法，修改handleSelectionChange方法

将选中的数组对象中的id传给multipleSelection：this.multipleSelection = row.map(item => item.id);

// 多选handleSelectionChange(row) {console.log("选中row", row);this.multipleSelection = row.map(item => item.id);console.log("选中id", this.multipleSelection);},// 批量删除handleDeleteByBatch() {this.$confirm('确定删除选中的数据吗？', {confirmButtonText: "确定",cancelButtonText: "取消",type: "warning",}).then(() => {deleteByBatch(this.multipleSelection).then(res => {if (res.code === 200) {this.$message.success("删除成功");this.getCollectorList();} else {this.$message.error("删除失败");}})})},

后端代码

controller，AjaxResult是返回数据类型类，有需要的文末复制，更全面的代码可以gitee上下载ruoyi框架

@RestController
@RequestMapping("/student")
public class AController {@Autowiredprivate AService aService;@DeleteMapping("/deleteByBatch/{ids}")@ApiOperation("批量删除")public AjaxResult deleteByBatch( @PathVariable List<Long> ids){return AjaxResult.success(aService.deleteByBatch(ids));}
}

xml（此处做的逻辑删除）

<update id="deleteByBatch" parameterType="com.system.domain.A">update a set del_flag = 2 where id in<foreach collection="ids" item="id" open="(" separator="," close=")">#{id}</foreach></update>

AjaxResult

public class AjaxResult extends HashMap<String, Object>
{private static final long serialVersionUID = 1L;/** 状态码 */public static final String CODE_TAG = "code";/** 返回内容 */public static final String MSG_TAG = "msg";/** 数据对象 */public static final String DATA_TAG = "data";/*** 初始化一个新创建的 AjaxResult 对象，使其表示一个空消息。*/public AjaxResult(){}/*** 初始化一个新创建的 AjaxResult 对象* * @param code 状态码* @param msg 返回内容*/public AjaxResult(int code, String msg){super.put(CODE_TAG, code);super.put(MSG_TAG, msg);}/*** 初始化一个新创建的 AjaxResult 对象* * @param code 状态码* @param msg 返回内容* @param data 数据对象*/public AjaxResult(int code, String msg, Object data){super.put(CODE_TAG, code);super.put(MSG_TAG, msg);if (StringUtils.isNotNull(data)){super.put(DATA_TAG, data);}}/*** 返回成功消息* * @return 成功消息*/public static AjaxResult success(){return AjaxResult.success("操作成功");}/*** 返回成功数据* * @return 成功消息*/public static AjaxResult success(Object data){return AjaxResult.success("操作成功", data);}/*** 返回成功消息* * @param msg 返回内容* @return 成功消息*/public static AjaxResult success(String msg){return AjaxResult.success(msg, null);}/*** 返回成功消息* * @param msg 返回内容* @param data 数据对象* @return 成功消息*/public static AjaxResult success(String msg, Object data){return new AjaxResult(HttpStatus.SUCCESS, msg, data);}/*** 返回警告消息** @param msg 返回内容* @return 警告消息*/public static AjaxResult warn(String msg){return AjaxResult.warn(msg, null);}/*** 返回警告消息** @param msg 返回内容* @param data 数据对象* @return 警告消息*/public static AjaxResult warn(String msg, Object data){return new AjaxResult(HttpStatus.WARN, msg, data);}/*** 返回错误消息* * @return 错误消息*/public static AjaxResult error(){return AjaxResult.error("操作失败");}/*** 返回错误消息* * @param msg 返回内容* @return 错误消息*/public static AjaxResult error(String msg){return AjaxResult.error(msg, null);}/*** 返回错误消息* * @param msg 返回内容* @param data 数据对象* @return 错误消息*/public static AjaxResult error(String msg, Object data){return new AjaxResult(HttpStatus.ERROR, msg, data);}/*** 返回错误消息* * @param code 状态码* @param msg 返回内容* @return 错误消息*/public static AjaxResult error(int code, String msg){return new AjaxResult(code, msg, null);}/*** 是否为成功消息** @return 结果*/public boolean isSuccess(){return Objects.equals(HttpStatus.SUCCESS, this.get(CODE_TAG));}/*** 是否为警告消息** @return 结果*/public boolean isWarn(){return Objects.equals(HttpStatus.WARN, this.get(CODE_TAG));}/*** 是否为错误消息** @return 结果*/public boolean isError(){return Objects.equals(HttpStatus.ERROR, this.get(CODE_TAG));}/*** 方便链式调用** @param key 键* @param value 值* @return 数据对象*/@Overridepublic AjaxResult put(String key, Object value){super.put(key, value);return this;}
}