在 MyBatis 中，可以使用相同的 SQL 映射语句进行批量删除和单个删除。

前端代码：

后端代码：

controller

service层接口

效果：（点击操作列的删除，可删除一行数据。勾选多个多选框再点击批量删除，可删除多个）

前端代码：

html 复制代码

<el-input placeholder="请输入姓名" v-model="keyWord" style="width: 400px">
  <el-button slot="append" icon="el-icon-search" @click="selectAllUser()"></el-button>
</el-input>
<el-button type="primary" @click="batchDeleteUser()">批量删除</el-button>
<el-table :data="tableData" border style="width: 100%" @selection-change="handleSelectionChange">
  <el-table-column type="selection" width="55"></el-table-column>
  <el-table-column prop="name" label="姓名" width="180"></el-table-column>
  <el-table-column prop="phone" label="电话" width="180"></el-table-column>
  <el-table-column prop="grades" label="班级" width="180"></el-table-column>
  <el-table-column prop="operate" label="操作" align="center" fixed="right">
    <template slot-scope="scope">
      <!-- (scope.row.userId)用于获取当前行数据对象中的用户ID（或其他字段） -->
      <el-button size="mini" type="text" @click="openDialog(scope.row)">编辑</el-button>
      <el-button size="mini" type="text" @click="deleteOneUser(scope.row)">删除</el-button>
    </template>
  </el-table-column>
</el-table>

javascript 复制代码

export default {
  data() {
    return {
      tableData: [],
      selectedIds: [], // 存储选中行的ID的数组
      
    }
  },
  methods: {
     //判断用户选择了什么
    handleSelectionChange(selection) {
      this.selectedIds = selection.map(item => item.id);
    },
    //删除用户（删除多个）
    batchDeleteUser() {
      this.deleteUser(this.selectedIds)
    },
    //删除用户（删除单个）
    deleteOneUser(row) {
      let selectIdArray = [];
      selectIdArray.push(row.id);
      this.deleteUser(selectIdArray)
    },
    //删除用户逻辑
    deleteUser(selectIdArray) {
      this.$confirm('确认删除？')
        .then(() => {
          //点击确定后的逻辑
          this.$axios({
            method: "post",
            url: "http://localhost:8080/api/user/deleteUser",
            data: selectIdArray
          }).then((res) => {
            if (res.data.code === '200') {
              this.$message({
                message: res.data.message,
                type: "success"
              });
              this.selectAllUser();
            } else {
              this.$message({
                message: res.data.message,
                type: "failed"
              });
            }
          })
        })
        .catch(() => {});
    }
  }
}

后端代码：

controller

java 复制代码

@RestController
@RequestMapping("/user")
public class UserController {
    @Autowired
    UserService userService;

    //删除用户
    @PostMapping("/deleteUser")
    public Result deleteUser(@RequestBody String[] userArray){
        return  userService.deleteUser(Arrays.asList(userArray));
    }
  
}

service层接口

java 复制代码

public interface UserService {

    Result deleteUser(List<String> UserList);
}

service接口的实现

java 复制代码

public Result deleteUser(List<String> userList) {
    // 判断userList是否为空
    if (CollectionUtils.isEmpty(userList)) {
        // 如果是空，则返回删除成功信息和删除数量为0
        return Result.succeed("删除成功", 0);
    }

    // 调用userMapper.deleteUser方法来删除指定的用户
    int count = userMapper.deleteUser(userList);

    // 判断删除是否成功
    if (count == userList.size()) {
        // 如果全部删除成功，则返回删除成功信息和删除的用户数量
        return Result.succeed("删除成功", count);
    } else {
        // 如果只有部分删除成功，则返回部分删除成功信息和删除的用户数量
        return Result.succeed("删除部分成功", count);
    }
}

mapper层接口

java 复制代码

public interface UserMapper {

    int deleteUser(List<String> userList);

}

xml

XML 复制代码

    <update id="deleteUser">
        update user
        set
        status='0'
        where id in
        <foreach collection="list" item="item" open="(" close=")" separator=",">
            #{item}
        </foreach>
    </update>

数据库

sql

sql 复制代码

/*
 Navicat Premium Data Transfer

 Source Server         : database
 Source Server Type    : MySQL
 Source Server Version : 80029
 Source Host           : localhost:3306
 Source Schema         : score_management_db

 Target Server Type    : MySQL
 Target Server Version : 80029
 File Encoding         : 65001

 Date: 18/02/2024 13:52:16
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user`  (
  `userId` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '账号',
  `name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '姓名',
  `password` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '密码',
  `phone` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '手机号',
  `grades` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '班级',
  `sex` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '性别',
  `age` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '年龄',
  `address` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '地址',
  `status` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT '1' COMMENT '状态',
  `id` int NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 11 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('zhangsan', '张三', '1234', '1778299200', '软件一班', '男', '341', '广西1', '1', 1);
INSERT INTO `user` VALUES ('zhangsi', '张四', '1234', '1778299200', '软件一班', '男399999', '3嗯嗯嗯', '广v', '1', 2);
INSERT INTO `user` VALUES ('liuliu', '刘六', '1234', '1778299200', '软件二班', '男', '34', '广西', '1', 3);
INSERT INTO `user` VALUES ('1', '陈万祥222', '1', '55566777888', '软件二班', NULL, NULL, NULL, '0', 10);
INSERT INTO `user` VALUES ('laoxiaming', '劳霞明', 'laoxiaming', '4646436', '软件二班', NULL, NULL, NULL, '1', 11);

SET FOREIGN_KEY_CHECKS = 1;