后端

数据回显，根据ID回显

 @GetMapping("/findById/{id}")
    public Users findById(@PathVariable("id") Integer id){
        return usersRepository.findById(id).get();
    }

修改数据，根据回显的数据回显

  @PutMapping("/update")
    public String update(@RequestBody Users users){
        Users result = usersRepository.save(users);
        if (result!= null){
            return "success";
        }else {
            return "SB, this is error";
        }
    }

前端

写一个路由，支持修改跳转

import UserUpdate from "../views/UserUpdate.vue";


    {
        path: '/userUpate',
        component: UserUpdate
    }

UserUpdate.vue

<template>
    <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
        <el-form-item label="ID">
            <el-input v-model="ruleForm.id" readOnly></el-input>
        </el-form-item>
        <el-form-item label="名称" prop="name">
            <el-input v-model="ruleForm.name"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password">
            <el-input v-model="ruleForm.password"></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
            <el-input v-model="ruleForm.email"></el-input>
        </el-form-item>
        <el-form-item label="生日" prop="birthday">
            <el-input v-model="ruleForm.birthday"></el-input>
        </el-form-item>
        <el-form-item>
            <el-button type="primary" @click="submitForm('ruleForm')">修改</el-button>
            <el-button @click="resetForm('ruleForm')">重置</el-button>
        </el-form-item>
    </el-form>
</template>

<script>
    export default {
        data() {
            return {
                ruleForm: {
                    id: '',
                    name: '',
                    password: '',
                    email: '',
                    birthday: ''
                },
                rules: {
                    name: [
                        {required: true, message: '名称不能为空', trigger: 'blur'},
                    ],
                    password: [
                        {required: true, message: '密码不能为空', trigger: 'blur'}
                    ],
                    email: [
                        {required: true, message: '邮箱不能为空', trigger: 'blur'},
                        {type: 'email', message: '邮箱格式不正确', trigger: 'blur'}
                    ],
                    birthday: [
                        {required: true, message: '生日不能为空', trigger: 'blur'}
                    ]
                }
            };
        },
        methods: {
            submitForm(formName) {
                const _this = this
                this.$refs[formName].validate((valid) => {
                    if (valid) {
                        axios.put('http://localhost:8181/user/update',this.ruleForm).then(function (resp){
                            if (resp.data == 'success'){
                                alert('修改成功')
                            }
                        })
                    } else {
                        return false;
                    }
                });
            },
            resetForm(formName) {
                this.$refs[formName].resetFields();
            }
        },
        created(){
            const _this = this
            axios.get('http://localhost:8181/user/findById/'+this.$route.query.id).then(function (resp){
                _this.ruleForm = resp.data
            })

        }
    }
</script>