服务器端

@RestController
@RequestMapping("/teacher")
public class TeacherController {
    @Resource
    private TeacherService teacherService;

    @GetMapping({"/v1/getTop10TeacherByName/","/v1/getTop10TeacherByName/{name}"})
    public ResultBean<List<EntryBean>> getTop10TeacherByName(@PathVariable(value = "name",required = false) String name) {
        List<EntryBean> list = teacherService.getTop10TeacherByName(name);
        return ResultBeanUtil.success(list);
    }

}

返回数据示例，比如请求：/teacher/v1/getgetTop10TeacherByName/大，返回数据：

[
    {
        "code": 200,
        "msg": "成功",
        "data": [
            {
                "id": 2,
                "name": "史宇大"
            },
            {
                "id": 1,
                "name": "蔡大伟"
            },
            {
                "id": 3,
                "name": "秦大"
            }
        ]
    }
]

vue页面

<template>
	<div style="padding: 100px">
		<el-autocomplete
			v-model="selectedName"
			value-key="name"
			:fetch-suggestions="handleSearch"
			clearable
			placeholder="请输入关键字"
			@select="handleSelect"
		/>
	</div>
</template>

<script setup lang="ts">
import { getTop10TeacherByName } from "@/views/data/teacher/api/teacher";
import { onMounted, ref } from "vue";

// 游戏
const selectedName = ref("");

// 查询
const handleSearch = (queryString: string, callback: (args: EntryBean[]) => void) => {
	if (queryString) {
		getTop10TeacherByName({ name: queryString }).then(res => {
			console.log("从后台查询数据", res);
			if (res && res.code === 200 && res.data) {
				const results = queryString
					? res.data.filter(tmp => {
							return tmp.name.toLowerCase().indexOf(queryString.toLowerCase()) != -1;
					  })
					: res.data;
				callback(results);
			}
		});
	}
};

// 选择
const handleSelect = (item: EntryBean) => {
	console.log("用户选择的：", item.id, item.name);
};

onMounted(() => {});
</script>

效果