Vue.js + Spring Boot + H2 Database [embedded mode] example | Spring Data JPA + RestAPIs CRUD example

H2 database is an open source that provides JDBC API to connect to Java applications. It also provides browser based console for convenient use. In this Vue.js Spring Boot tutorial, we show you Vue.js Http Client & Spring Boot Server example that uses Spring JPA to do CRUD with H2 Database and Vue.js as a front-end technology to make request and receive response.

Related Posts:
– Integrate H2 database with SpringBoot & Spring JPA in Embedded mode
– Vue Router example – with Nav Bar, Dynamic Route & Nested Routes

Technologies

– Java 1.8
– Maven 3.3.9
– Spring Tool Suite – Version 3.8.4.RELEASE
– Spring Boot: 2.0.5.RELEASE

– Vue 2.5.17
– Vue Router 3
– Axios 0.18.0

Overview

This is full-stack Architecture:

Demo

1. Spring Boot Server

2. Vue.js Client

Practice

1. Spring Boot Server

– Customer class corresponds to entity and table customer.
– CustomerRepository is an interface extends CrudRepository, will be autowired in CustomerController for implementing repository methods and custom finder methods.
– CustomerController is a REST Controller which has request mapping methods for RESTful requests such as: getAllCustomers, postCustomer, deleteCustomer, findByAge, updateCustomer.
– Configuration for Spring Datasource and Spring JPA properties in application.properties
– Dependencies for Spring Boot and H2 Database in pom.xml

1.1 Dependency

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
  <groupId>com.h2database</groupId>
  <artifactId>h2</artifactId>
  <scope>runtime</scope>
</dependency>

1.2 Data Model

model/Customer.java

package com.ozenero.spring.restapi.h2.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "customer")
public class Customer {

  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  private long id;

  @Column(name = "name")
  private String name;

  @Column(name = "age")
  private int age;

  @Column(name = "active")
  private boolean active;

  public Customer() {
  }

  public Customer(String name, int age) {
    this.name = name;
    this.age = age;
    this.active = false;
  }

  public long getId() {
    return id;
  }

  public void setName(String name) {
    this.name = name;
  }

  public String getName() {
    return this.name;
  }

  public void setAge(int age) {
    this.age = age;
  }

  public int getAge() {
    return this.age;
  }

  public boolean isActive() {
    return active;
  }

  public void setActive(boolean active) {
    this.active = active;
  }

  @Override
  public String toString() {
    return "Customer [id=" + id + ", name=" + name + ", age=" + age + ", active=" + active + "]";
  }
}

1.3 JPA Repository

repo/CustomerRepository.java

package com.ozenero.spring.restapi.h2.repo;

import java.util.List;

import org.springframework.data.repository.CrudRepository;

import com.ozenero.spring.restapi.h2.model.Customer;

public interface CustomerRepository extends CrudRepository {
  List findByAge(int age);
}

1.4 REST Controller

controller/CustomerController.java

package com.ozenero.spring.restapi.h2.controller;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.ozenero.spring.restapi.h2.model.Customer;
import com.ozenero.spring.restapi.h2.repo.CustomerRepository;

@CrossOrigin(origins = "http://localhost:4200")
@RestController
@RequestMapping("/api")
public class CustomerController {

  @Autowired
  CustomerRepository repository;

  @GetMapping("/customers")
  public List getAllCustomers() {
    System.out.println("Get all Customers...");

    List customers = new ArrayList<>();
    repository.findAll().forEach(customers::add);

    return customers;
  }

  @PostMapping("/customer")
  public Customer postCustomer(@RequestBody Customer customer) {

    Customer _customer = repository.save(new Customer(customer.getName(), customer.getAge()));
    return _customer;
  }

  @DeleteMapping("/customer/{id}")
  public ResponseEntity deleteCustomer(@PathVariable("id") long id) {
    System.out.println("Delete Customer with ID = " + id + "...");

    repository.deleteById(id);

    return new ResponseEntity<>("Customer has been deleted!", HttpStatus.OK);
  }

  @GetMapping("customers/age/{age}")
  public List findByAge(@PathVariable int age) {

    List customers = repository.findByAge(age);
    return customers;
  }

  @PutMapping("/customer/{id}")
  public ResponseEntity updateCustomer(@PathVariable("id") long id, @RequestBody Customer customer) {
    System.out.println("Update Customer with ID = " + id + "...");

    Optional customerData = repository.findById(id);

    if (customerData.isPresent()) {
      Customer _customer = customerData.get();
      _customer.setName(customer.getName());
      _customer.setAge(customer.getAge());
      _customer.setActive(customer.isActive());
      return new ResponseEntity<>(repository.save(_customer), HttpStatus.OK);
    } else {
      return new ResponseEntity<>(HttpStatus.NOT_FOUND);
    }
  }
}

1.5 Configuration for Spring Datasource & JPA properties

application.properties

spring.h2.console.enabled=true
spring.h2.console.path=/h2_console
spring.datasource.url=jdbc:h2:file:~/h2/testdb
spring.datasource.username=sa
spring.datasource.password=
spring.datasource.driverClassName=org.h2.Driver
spring.jpa.hibernate.ddl-auto = update
spring.jpa.show-sql=true

*Note:
– jdbc:h2:mem is for in-memory databases.
– jdbc:h2:file is for disk-based databases.

More details at: H2 Database URL Overview

2. Vue.js Client

– package.json with 3 main modules: vue, vue-router, axios.
– 4 components: CustomersList, Customer, AddCustomer, SearchCustomer.
– router.js defines routes, each route has a path and maps to a component.
– http-common.js initializes HTTP Client with baseUrl and headers for axios HTTP methods.
– vue.config.js configures port for Vue App.

For more details about how to use Vue Router in this example, please visit:
Vue Router example – with Nav Bar, Dynamic Route & Nested Routes

2.0 Setup Vue Project & Router

Init Project

Point cmd to the folder you want to save Project folder, run command:
vue create vue-springboot

You will see 2 options, choose default:

Add Vue Router to Project

– Run command: npm install vue-router.
– Import router to src/main.js:

import Vue from "vue";
import App from "./App.vue";
import router from './router'

Vue.config.productionTip = false;

new Vue({
  router, // inject the router to make whole app router-aware
  render: h => h(App)
}).$mount("#app");

Define Routes

src/router.js:

import Vue from "vue";
import Router from "vue-router";
import CustomersList from "./components/CustomersList.vue";
import AddCustomer from "./components/AddCustomer.vue";
import SearchCustomers from "./components/SearchCustomers.vue";
import Customer from "./components/Customer.vue";

Vue.use(Router);

export default new Router({
  mode: "history",
  routes: [
    {
      path: "/",
      name: "customers",
      alias: "/customer",
      component: CustomersList,
      children: [
        {
          path: "/customer/:id",
          name: "customer-details",
          component: Customer,
          props: true
        }
      ]
    },
    {
      path: "/add",
      name: "add",
      component: AddCustomer
    },
    {
      path: "/search",
      name: "search",
      component: SearchCustomers
    }
  ]
});

App template with Navbar and router-view

src/App.vue:

<template>
    <div id="app" class="container-fluid">
        <div class="site-info">
            <h1>ozenero</h1>
            <h3>Vue SpringBoot example</h3>
        </div>
        <nav>
            <router-link class="btn btn-primary" to="/">Customers</router-link>
            <router-link class="btn btn-primary" to="/add">Add</router-link>
            <router-link class="btn btn-primary" to="/search">Search</router-link>
        </nav>
        <br/>
        <router-view/>
    </div>
</template>

<script>
export default {
  name: "app"
};
</script>

<style>
.site-info {
  color: blue;
  margin-bottom: 20px;
}

.btn-primary {
  margin-right: 5px;
}

.container-fluid {
  text-align: center;
}
</style>

2.1 Initialize HTTP Client

Install axios with command: npm install axios.
Then create http-common.js file:

import axios from "axios";

export default axios.create({
  baseURL: "http://localhost:8080/api",
  headers: {
    "Content-type": "application/json",
  }
});

2.2 Components

List of Items

components/CustomersList.vue

<template>
    <div class="list row">
        <div class="col-md-6">
            <h4>Customers List</h4>
            <ul>
                <li v-for="(customer, index) in customers" :key="index">
                    <router-link :to="{
                            name: 'customer-details',
                            params: { customer: customer, id: customer.id }
                        }">
                            {{customer.name}}
                    </router-link>
                </li>
            </ul>
        </div>
        <div class="col-md-6">
            <router-view @refreshData="refreshList"></router-view>
        </div>
    </div>
</template>

<script>
import http from "../http-common";

export default {
  name: "customers-list",
  data() {
    return {
      customers: []
    };
  },
  methods: {
    /* eslint-disable no-console */
    retrieveCustomers() {
      http
        .get("/customers")
        .then(response => {
          this.customers = response.data; // JSON are parsed automatically.
          console.log(response.data);
        })
        .catch(e => {
          console.log(e);
        });
    },
    refreshList() {
      this.retrieveCustomers();
    }
    /* eslint-enable no-console */
  },
  mounted() {
    this.retrieveCustomers();
  }
};
</script>

<style>
.list {
  text-align: left;
  max-width: 450px;
  margin: auto;
}
</style>

Item Details

components/Customer.vue

<template>
  <div v-if="this.customer">
    <h4>Customer</h4>
    <div>
      <label>Name: </label> {{this.customer.name}}
    </div>
    <div>
      <label>Age: </label> {{this.customer.age}}
    </div>
    <div>
      <label>Active: </label> {{this.customer.active}}
    </div>
  
    <span v-if="this.customer.active"
      v-on:click="updateActive(false)"
      class="button is-small btn-primary">Inactive</span>
    <span v-else
      v-on:click="updateActive(true)"
      class="button is-small btn-primary">Active</span>
  
    <span class="button is-small btn-danger" v-on:click="deleteCustomer()">Delete</span>
  </div>
  <div v-else>
    <br/>
    <p>Please click on a Customer...</p>
  </div>
</template>

<script>
import http from "../http-common";

export default {
  name: "customer",
  props: ["customer"],
  methods: {
    /* eslint-disable no-console */
    updateActive(status) {
      var data = {
        id: this.customer.id,
        name: this.customer.name,
        age: this.customer.age,
        active: status
      };

      http
        .put("/customer/" + this.customer.id, data)
        .then(response => {
          this.customer.active = response.data.active;
          console.log(response.data);
        })
        .catch(e => {
          console.log(e);
        });
    },
    deleteCustomer() {
      http
        .delete("/customer/" + this.customer.id)
        .then(response => {
          console.log(response.data);
          this.$emit("refreshData");
          this.$router.push('/');
        })
        .catch(e => {
          console.log(e);
        });
    }
    /* eslint-enable no-console */
  }
};
</script>

Add Item

components/AddCustomer.vue

<template>
  <div class="submitform">
    <div v-if="!submitted">
        <div class="form-group">
          <label for="name">Name</label>
          <input type="text" class="form-control" id="name" required v-model="customer.name" name="name">
        </div>
    
        <div class="form-group">
          <label for="age">Age</label>
          <input type="number" class="form-control" id="age" required v-model="customer.age" name="age">
        </div>
    
        <button v-on:click="saveCustomer" class="btn btn-success">Submit</button>
    </div>
    
    <div v-else>
      <h4>You submitted successfully!</h4>
      <button class="btn btn-success" v-on:click="newCustomer">Add</button>
    </div>
  </div>
</template>

<script>
import http from "../http-common";

export default {
  name: "add-customer",
  data() {
    return {
      customer: {
        id: 0,
        name: "",
        age: 0,
        active: false
      },
      submitted: false
    };
  },
  methods: {
    /* eslint-disable no-console */
    saveCustomer() {
      var data = {
        name: this.customer.name,
        age: this.customer.age
      };

      http
        .post("/customer", data)
        .then(response => {
          this.customer.id = response.data.id;
          console.log(response.data);
        })
        .catch(e => {
          console.log(e);
        });

      this.submitted = true;
    },
    newCustomer() {
      this.submitted = false;
      this.customer = {};
    }
    /* eslint-enable no-console */
  }
};
</script>

<style>
.submitform {
  max-width: 300px;
  margin: auto;
}
</style>

Search Items

components/SearchCustomers.vue

<template>
  <div class="searchform">
    <h4>Find by Age</h4>
    <div class="form-group">
      <input type="number" class="form-control" id="age" required v-model="age" name="age">
    </div>
 
    <div class="btn-group">
      <button v-on:click="searchCustomers" class="btn btn-success">Search</button>
    </div>

    <ul class="search-result">
      <li v-for="(customer, index) in customers" :key="index">
        <h6>{{customer.name}} ({{customer.age}})</h6>
      </li>
    </ul>
  </div>
</template>

<script>
import http from "../http-common";

export default {
  name: "search-customer",
  data() {
    return {
      age: 0,
      customers: []
    };
  },
  methods: {
    /* eslint-disable no-console */
    searchCustomers() {
      http
        .get("/customers/age/" + this.age)
        .then(response => {
          this.customers = response.data; // JSON are parsed automatically.
          console.log(response.data);
        })
        .catch(e => {
          console.log(e);
        });
    }
    /* eslint-enable no-console */
  }
};
</script>

<style>
.searchform {
  max-width: 300px;
  margin: auto;
}
.search-result {
  margin-top: 20px;
  text-align: left;
}
</style>

2.3 Configure Port for Vue App

vue.config.js

module.exports = {
  devServer: {
    port: 4200
  }
}

Run

– Spring Boot Server: mvn clean install and mvn spring-boot:run.
– Vue.js Client: npm run serve.

Open Browser with Url: http://localhost:4200/.

Source Code

– SpringBootRestH2Database
– vue-springboot