Spring Boot + AngularJS + Spring Data + JPA CRUD App Example

This post hasn't been updated for 3 years

Trong bài trước tôi đã có giới thiệu về Spring Boot, 1 framework rất mạnh mẽ được xây dựng dựạ trên backbone của Spring Framework, giúp giảm tải cấu hình, tăng tốc quá trình phát triển.

Ở bài này, tôi sẽ demo 1 ứng dụng thêm, sửa, xóa sử dụng Spring Boot kết hợp với AngularJS, JPA và MySQL.

- Các công nghệ có sử trong project:

Spring Boot 1.4.3.RELEASE
Spring 4.3.5.RELEASE
Spring data JPA 1.10.6.RELEASE
Hibernate 5.0.11.Final
MySQL 5.1.40
H2 1.4.187
AngularJS 1.5.8
Maven 3.1
JDK 1.8
Intellij IDEA

1. Cấu trúc Project:

2. Dependency của project:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
 
    <groupId>com.websystique.springboot</groupId>
    <artifactId>SpringBootCRUDApplicationExample</artifactId>
    <version>1.0.0</version>
    <packaging>jar</packaging>
 
    <name>SpringBootCRUDApplicationExample</name>
 
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.3.RELEASE</version>
    </parent>
 
    <properties>
        <java.version>1.8</java.version>
        <h2.version>1.4.187</h2.version>
    </properties>
 
    <dependencies>
        <!-- Add typical dependencies for a web application -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- Add freemarker template support -->     
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>
        <!-- Add JPA support -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <!-- Add Hikari Connection Pooling support -->
        <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP</artifactId>
        </dependency>
        <!-- Add H2 database support [for running with local profile] -->
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>${h2.version}</version>
        </dependency>
        <!-- Add MySQL database support [for running with PRODUCTION profile] -->    
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.5</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin><!-- Include if you want to make an executable jar[FAT JAR which 
                includes all dependencies along with sprinboot loader] that you can run on 
                    commandline using java -jar NAME -->
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

spring-boot-starter-parent: Cung cấp các default hữu ích của maven, cung cấp các thành phần quản lý dependency trong trường hợp bạn có thể quên khai báo version của các dependencies. spring-boot-starter-web: Cung cấp các container điển hình của WEB MVC + Embeded. spring-boot-starter-freemarker: Cung cấp các template của thư viện rất phổ biến trong java là freemarker. spring-boot-starter-data-jpa: Cung cấp spring-data để thiết lập các thành phần JPA abstraction, giúp thao tác dễ dàng với tầng DAO.

3. Spring Boot Application [Main class]

package com.websystique.springboot;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Import;
 
import com.websystique.springboot.configuration.JpaConfiguration;
 
 
@Import(JpaConfiguration.class)
@SpringBootApplication(scanBasePackages={"com.websystique.springboot"})
public class SpringBootCRUDApp {
 
    public static void main(String[] args) {
        SpringApplication.run(SpringBootCRUDApp.class, args);
    }
}

@SpringBootApplication là sự kết hợp của các annotation @EnableAutoConfiguration, @Configuration & @ComponentScan.
Spring Boot @SpringBootApplication cố gắng cấu hình tự động ứng dựng dựa trên các thành phần dependencies mà bạn đã added,. Ngay khi chúng ta added spring-boot-starter-web , Spring sẽ cấu hình cho ứng dụng web.

4. JPA configuration.

Spring Data @EnableJpaRepositories : Annocation enable JPA repositories. Nó sẽ scan xác định packages cho Spring Data repositories.
Spring Boot DataSourceProperties: là các class hữu dụng cho việc cấu hình data source.
Spring Boot DataSourceBuilder: là các builder, giúp mapping các properties datasource.

package com.websystique.springboot.configuration;
 
import java.util.Properties;
 
import javax.naming.NamingException;
import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;
 
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.env.Environment;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.JpaVendorAdapter;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
 
import com.zaxxer.hikari.HikariDataSource;
 
@Configuration
@EnableJpaRepositories(basePackages = "com.websystique.springboot.repositories",
        entityManagerFactoryRef = "entityManagerFactory",
        transactionManagerRef = "transactionManager")
@EnableTransactionManagement
public class JpaConfiguration {
 
    @Autowired
    private Environment environment;
 
    @Value("${datasource.sampleapp.maxPoolSize:10}")
    private int maxPoolSize;
 
    /*
     * Populate SpringBoot DataSourceProperties object directly from application.yml 
     * based on prefix.Thanks to .yml, Hierachical data is mapped out of the box with matching-name
     * properties of DataSourceProperties object].
     */
    @Bean
    @Primary
    @ConfigurationProperties(prefix = "datasource.sampleapp")
    public DataSourceProperties dataSourceProperties(){
        return new DataSourceProperties();
    }
 
    /*
     * Configure HikariCP pooled DataSource.
     */
    @Bean
    public DataSource dataSource() {
        DataSourceProperties dataSourceProperties = dataSourceProperties();
            HikariDataSource dataSource = (HikariDataSource) DataSourceBuilder
                    .create(dataSourceProperties.getClassLoader())
                    .driverClassName(dataSourceProperties.getDriverClassName())
                    .url(dataSourceProperties.getUrl())
                    .username(dataSourceProperties.getUsername())
                    .password(dataSourceProperties.getPassword())
                    .type(HikariDataSource.class)
                    .build();
            dataSource.setMaximumPoolSize(maxPoolSize);
            return dataSource;
    }
 
    /*
     * Entity Manager Factory setup.
     */
    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() throws NamingException {
        LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
        factoryBean.setDataSource(dataSource());
        factoryBean.setPackagesToScan(new String[] { "com.websystique.springboot.model" });
        factoryBean.setJpaVendorAdapter(jpaVendorAdapter());
        factoryBean.setJpaProperties(jpaProperties());
        return factoryBean;
    }
 
    /*
     * Provider specific adapter.
     */
    @Bean
    public JpaVendorAdapter jpaVendorAdapter() {
        HibernateJpaVendorAdapter hibernateJpaVendorAdapter = new HibernateJpaVendorAdapter();
        return hibernateJpaVendorAdapter;
    }
 
    /*
     * Here you can specify any provider specific properties.
     */
    private Properties jpaProperties() {
        Properties properties = new Properties();
        properties.put("hibernate.dialect", environment.getRequiredProperty("datasource.sampleapp.hibernate.dialect"));
        properties.put("hibernate.hbm2ddl.auto", environment.getRequiredProperty("datasource.sampleapp.hibernate.hbm2ddl.method"));
        properties.put("hibernate.show_sql", environment.getRequiredProperty("datasource.sampleapp.hibernate.show_sql"));
        properties.put("hibernate.format_sql", environment.getRequiredProperty("datasource.sampleapp.hibernate.format_sql"));
        if(StringUtils.isNotEmpty(environment.getRequiredProperty("datasource.sampleapp.defaultSchema"))){
            properties.put("hibernate.default_schema", environment.getRequiredProperty("datasource.sampleapp.defaultSchema"));
        }
        return properties;
    }
 
    @Bean
    @Autowired
    public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
        JpaTransactionManager txManager = new JpaTransactionManager();
        txManager.setEntityManagerFactory(emf);
        return txManager;
    }
}

5. Property file [application.yml]

Thông thường theo truyền thống chúng ta hay sử dụng file .properties, nhưng trong Spring Boot còn hộ trợ YAML cung cấp thư viện **SnakeYAML ** , nó thường xuyên được sử dụng ngay từ lúc start project. YAML các tập hợp cha của JSON, rất tiện lợi cho việc phân cấp dữ liệu. src/main/resources/application.yml:

---
server:
  port: 8080
  contextPath: /SpringBootCRUDApp
---
spring:
  profiles: default
  active: default
datasource:
  sampleapp:
    url: jdbc:h2:~/test
    username: SA
    password:
    driverClassName: org.h2.Driver
    defaultSchema:
    maxPoolSize: 10
    hibernate:
      hbm2ddl.method: create-drop
      show_sql: true
      format_sql: true
      dialect: org.hibernate.dialect.H2Dialect
---
spring:
  profiles: prod
  active: prod
datasource:
  sampleapp:
    url: jdbc:mysql://localhost:3306/websystique
    username: root
    password:
    driverClassName: com.mysql.jdbc.Driver
    defaultSchema:
    maxPoolSize: 20
    hibernate:
      hbm2ddl.method: update
      show_sql: true
      format_sql: true
      dialect: org.hibernate.dialect.MySQLDialect

6. Model

User.java

package com.websystique.springboot.model;
 
import org.hibernate.validator.constraints.NotEmpty;
 
import javax.persistence.*;
import java.io.Serializable;
 
@Entity
@Table(name="APP_USER")
public class User implements Serializable{
 
    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    private Long id;
 
    @NotEmpty
    @Column(name="NAME", nullable=false)
    private String name;
 
    @Column(name="AGE", nullable=false)
    private Integer age;
 
    @Column(name="SALARY", nullable=false)
    private double salary;
 
--- getter/setter omitted to save space
}

7. Spring-Data repositories

package com.websystique.springboot.repositories;
 
import com.websystique.springboot.model.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
 
@Repository
public interface UserRepository extends JpaRepository<User, Long> {
 
    User findByName(String name);
 
}

8. Service

Controller sẽ sử dụng các service này cho các hoạt động liên quan đến User. Service sử dụng spring-data repositories cho việc access và update user.


package com.websystique.springboot.service;
 
import com.websystique.springboot.model.User;
import java.util.List;
 
public interface UserService {
     
    User findById(Long id);
 
    User findByName(String name);
 
    void saveUser(User user);
 
    void updateUser(User user);
 
    void deleteUserById(Long id);
 
    void deleteAllUsers();
 
    List<User> findAllUsers();
 
    boolean isUserExist(User user);
}

package com.websystique.springboot.service;
 
import java.util.List;
 
import com.websystique.springboot.model.User;
import com.websystique.springboot.repositories.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
 
@Service("userService")
@Transactional
public class UserServiceImpl implements UserService{
 
    @Autowired
    private UserRepository userRepository;
 
    public User findById(Long id) {
        return userRepository.findOne(id);
    }
 
    public User findByName(String name) {
        return userRepository.findByName(name);
    }
 
    public void saveUser(User user) {
        userRepository.save(user);
    }
 
    public void updateUser(User user){
        saveUser(user);
    }
 
    public void deleteUserById(Long id){
        userRepository.delete(id);
    }
 
    public void deleteAllUsers(){
        userRepository.deleteAll();
    }
 
    public List<User> findAllUsers(){
        return userRepository.findAll();
    }
 
    public boolean isUserExist(User user) {
        return findByName(user.getName()) != null;
    }
 
}

9. Controllers

Trong ví dụ này chúng ta sử dụng 2 controller, 1 sử dụng cho việc view, 1 để handle REST API.

package com.websystique.springboot.controller;
 
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
 
@Controller
public class AppController {
 
    @RequestMapping("/")
    String home(ModelMap modal) {
        modal.addAttribute("title","CRUD Example");
        return "index";
    }
 
    @RequestMapping("/partials/{page}")
    String partialHandler(@PathVariable("page") final String page) {
        return page;
    } 
}


package com.websystique.springboot.controller;
 
import java.util.List;
 
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.util.UriComponentsBuilder;
 
import com.websystique.springboot.model.User;
import com.websystique.springboot.service.UserService;
import com.websystique.springboot.util.CustomErrorType;
 
@RestController
@RequestMapping("/api")
public class RestApiController {
 
    public static final Logger logger = LoggerFactory.getLogger(RestApiController.class);
 
    @Autowired
    UserService userService; //Service which will do all data retrieval/manipulation work
 
    // -------------------Retrieve All Users---------------------------------------------
 
    @RequestMapping(value = "/user/", method = RequestMethod.GET)
    public ResponseEntity<List<User>> listAllUsers() {
        List<User> users = userService.findAllUsers();
        if (users.isEmpty()) {
            return new ResponseEntity(HttpStatus.NO_CONTENT);
            // You many decide to return HttpStatus.NOT_FOUND
        }
        return new ResponseEntity<List<User>>(users, HttpStatus.OK);
    }
 
    // -------------------Retrieve Single User------------------------------------------
 
    @RequestMapping(value = "/user/{id}", method = RequestMethod.GET)
    public ResponseEntity<?> getUser(@PathVariable("id") long id) {
        logger.info("Fetching User with id {}", id);
        User user = userService.findById(id);
        if (user == null) {
            logger.error("User with id {} not found.", id);
            return new ResponseEntity(new CustomErrorType("User with id " + id 
                    + " not found"), HttpStatus.NOT_FOUND);
        }
        return new ResponseEntity<User>(user, HttpStatus.OK);
    }
 
    // -------------------Create a User-------------------------------------------
 
    @RequestMapping(value = "/user/", method = RequestMethod.POST)
    public ResponseEntity<?> createUser(@RequestBody User user, UriComponentsBuilder ucBuilder) {
        logger.info("Creating User : {}", user);
 
        if (userService.isUserExist(user)) {
            logger.error("Unable to create. A User with name {} already exist", user.getName());
            return new ResponseEntity(new CustomErrorType("Unable to create. A User with name " + 
            user.getName() + " already exist."),HttpStatus.CONFLICT);
        }
        userService.saveUser(user);
 
        HttpHeaders headers = new HttpHeaders();
        headers.setLocation(ucBuilder.path("/api/user/{id}").buildAndExpand(user.getId()).toUri());
        return new ResponseEntity<String>(headers, HttpStatus.CREATED);
    }
 
    // ------------------- Update a User ------------------------------------------------
 
    @RequestMapping(value = "/user/{id}", method = RequestMethod.PUT)
    public ResponseEntity<?> updateUser(@PathVariable("id") long id, @RequestBody User user) {
        logger.info("Updating User with id {}", id);
 
        User currentUser = userService.findById(id);
 
        if (currentUser == null) {
            logger.error("Unable to update. User with id {} not found.", id);
            return new ResponseEntity(new CustomErrorType("Unable to upate. User with id " + id + " not found."),
                    HttpStatus.NOT_FOUND);
        }
 
        currentUser.setName(user.getName());
        currentUser.setAge(user.getAge());
        currentUser.setSalary(user.getSalary());
 
        userService.updateUser(currentUser);
        return new ResponseEntity<User>(currentUser, HttpStatus.OK);
    }
 
    // ------------------- Delete a User-----------------------------------------
 
    @RequestMapping(value = "/user/{id}", method = RequestMethod.DELETE)
    public ResponseEntity<?> deleteUser(@PathVariable("id") long id) {
        logger.info("Fetching & Deleting User with id {}", id);
 
        User user = userService.findById(id);
        if (user == null) {
            logger.error("Unable to delete. User with id {} not found.", id);
            return new ResponseEntity(new CustomErrorType("Unable to delete. User with id " + id + " not found."),
                    HttpStatus.NOT_FOUND);
        }
        userService.deleteUserById(id);
        return new ResponseEntity<User>(HttpStatus.NO_CONTENT);
    }
 
    // ------------------- Delete All Users-----------------------------
 
    @RequestMapping(value = "/user/", method = RequestMethod.DELETE)
    public ResponseEntity<User> deleteAllUsers() {
        logger.info("Deleting All Users");
 
        userService.deleteAllUsers();
        return new ResponseEntity<User>(HttpStatus.NO_CONTENT);
    }

Class helper để gửi các error từ API trong JSON

package com.websystique.springboot.util;
 
 
public class CustomErrorType {
 
    private String errorMessage;
 
    public CustomErrorType(String errorMessage){
        this.errorMessage = errorMessage;
    }
 
    public String getErrorMessage() {
        return errorMessage;
    }
 
}

10. Sử dụng MySQL setup database cho ứng dụng.

create table APP_USER (
   id BIGINT NOT NULL AUTO_INCREMENT,
   name VARCHAR(30) NOT NULL,
   age  INTEGER NOT NULL,
   salary REAL NOT NULL,
   PRIMARY KEY (id)
);
   
/* Populate USER Table */
INSERT INTO APP_USER(name,age,salary)
VALUES ('Dat',23,1000000000);
   
INSERT INTO APP_USER(name,age,salary)
VALUES ('Jose',23,5000000000);

Front-end

1. Freemarker Templates

src/main/resources/templates/index.ftl

<!DOCTYPE html>
 
<html lang="en" ng-app="crudApp">
    <head>
        <title>${title}</title>
        <link href="css/bootstrap.css" rel="stylesheet"/>
        <link href="css/app.css" rel="stylesheet"/>
    </head>
    <body>
 
        <div ui-view></div>
        <script src="js/lib/angular.min.js" ></script>
        <script src="js/lib/angular-ui-router.min.js" ></script>
        <script src="js/lib/localforage.min.js" ></script>
        <script src="js/lib/ngStorage.min.js"></script>
        <script src="js/app/app.js"></script>
        <script src="js/app/UserService.js"></script>
        <script src="js/app/UserController.js"></script>
    </body>
</html>

src/main/resources/templates/list.ftl:


<div class="generic-container">
    <div class="panel panel-default">
        <!-- Default panel contents -->
        <div class="panel-heading"><span class="lead">Specific User </span></div>
        <div class="panel-body">
            <div class="formcontainer">
                <div class="alert alert-success" role="alert" ng-if="ctrl.successMessage">{{ctrl.successMessage}}</div>
                <div class="alert alert-danger" role="alert" ng-if="ctrl.errorMessage">{{ctrl.errorMessage}}</div>
                <form ng-submit="ctrl.submit()" name="myForm" class="form-horizontal">
                    <input type="hidden" ng-model="ctrl.user.id" />
                    <div class="row">
                        <div class="form-group col-md-12">
                            <label class="col-md-2 control-lable" for="uname">Name</label>
                            <div class="col-md-7">
                                <input type="text" ng-model="ctrl.user.name" id="uname" class="username form-control input-sm" placeholder="Enter your name" required ng-minlength="3"/>
                            </div>
                        </div>
                    </div>
 
                    <div class="row">
                        <div class="form-group col-md-12">
                            <label class="col-md-2 control-lable" for="age">Age</label>
                            <div class="col-md-7">
                                <input type="text" ng-model="ctrl.user.age" id="age" class="form-control input-sm" placeholder="Enter your Age." required ng-pattern="ctrl.onlyIntegers"/>
                            </div>
                        </div>
                    </div>
     
                    <div class="row">
                        <div class="form-group col-md-12">
                            <label class="col-md-2 control-lable" for="salary">Salary</label>
                            <div class="col-md-7">
                                <input type="text" ng-model="ctrl.user.salary" id="salary" class="form-control input-sm" placeholder="Enter your Salary." required ng-pattern="ctrl.onlyNumbers"/>
                            </div>
                        </div>
                    </div>
 
                    <div class="row">
                        <div class="form-actions floatRight">
                            <input type="submit"  value="{{!ctrl.user.id ? 'Add' : 'Update'}}" class="btn btn-primary btn-sm" ng-disabled="myForm.$invalid || myForm.$pristine">
                            <button type="button" ng-click="ctrl.reset()" class="btn btn-warning btn-sm" ng-disabled="myForm.$pristine">Reset Form</button>
                        </div>
                    </div>
                </form>
            </div>
        </div>    
    </div>
    <div class="panel panel-default">
        <!-- Default panel contents -->
        <div class="panel-heading"><span class="lead">List of Users </span></div>
        <div class="panel-body">
            <div class="table-responsive">
                <table class="table table-hover">
                    <thead>
                    <tr>
                        <th>ID</th>
                        <th>NAME</th>
                        <th>AGE</th>
                        <th>SALARY</th>
                        <th width="100"></th>
                        <th width="100"></th>
                    </tr>
                    </thead>
                    <tbody>
                    <tr ng-repeat="u in ctrl.getAllUsers()">
                        <td>{{u.id}}</td>
                        <td>{{u.name}}</td>
                        <td>{{u.age}}</td>
                        <td>{{u.salary}}</td>
                        <td><button type="button" ng-click="ctrl.editUser(u.id)" class="btn btn-success custom-width">Edit</button></td>
                        <td><button type="button" ng-click="ctrl.removeUser(u.id)" class="btn btn-danger custom-width">Remove</button></td>
                    </tr>
                    </tbody>
                </table>      
            </div>
        </div>
    </div>
</div>

Static resources: chứa resource của project: js, css, image...

- Error Page src/main/resources/templates/error.ftl

<!DOCTYPE html>
 
<html lang="en">
<head>
    <link rel="stylesheet" type="text/css" href="css/bootstrap.css" />
</head>
<body>
    <div class="container">
        <div class="jumbotron alert-danger">
            <h1>Oops. Something went wrong</h1>
            <h2>${status} ${error}</h2>
        </div>
    </div>
</body>
 
</html>

2. AngularJs [ui-router based app]

src/main/resources/static/js/app.js


var app = angular.module('crudApp',['ui.router','ngStorage']);
 
app.constant('urls', {
    BASE: 'http://localhost:8080/SpringBootCRUDApp',
    USER_SERVICE_API : 'http://localhost:8080/SpringBootCRUDApp/api/user/'
});
 
app.config(['$stateProvider', '$urlRouterProvider',
    function($stateProvider, $urlRouterProvider) {
 
        $stateProvider
            .state('home', {
                url: '/',
                templateUrl: 'partials/list',
                controller:'UserController',
                controllerAs:'ctrl',
                resolve: {
                    users: function ($q, UserService) {
                        console.log('Load all users');
                        var deferred = $q.defer();
                        UserService.loadAllUsers().then(deferred.resolve, deferred.resolve);
                        return deferred.promise;
                    }
                }
            });
        $urlRouterProvider.otherwise('/');
    }]);

src/main/resources/static/js/UserService.js


'use strict';
 
angular.module('crudApp').factory('UserService',
    ['$localStorage', '$http', '$q', 'urls',
        function ($localStorage, $http, $q, urls) {
 
            var factory = {
                loadAllUsers: loadAllUsers,
                getAllUsers: getAllUsers,
                getUser: getUser,
                createUser: createUser,
                updateUser: updateUser,
                removeUser: removeUser
            };
 
            return factory;
 
            function loadAllUsers() {
                console.log('Fetching all users');
                var deferred = $q.defer();
                $http.get(urls.USER_SERVICE_API)
                    .then(
                        function (response) {
                            console.log('Fetched successfully all users');
                            $localStorage.users = response.data;
                            deferred.resolve(response);
                        },
                        function (errResponse) {
                            console.error('Error while loading users');
                            deferred.reject(errResponse);
                        }
                    );
                return deferred.promise;
            }
 
            function getAllUsers(){
                return $localStorage.users;
            }
 
            function getUser(id) {
                console.log('Fetching User with id :'+id);
                var deferred = $q.defer();
                $http.get(urls.USER_SERVICE_API + id)
                    .then(
                        function (response) {
                            console.log('Fetched successfully User with id :'+id);
                            deferred.resolve(response.data);
                        },
                        function (errResponse) {
                            console.error('Error while loading user with id :'+id);
                            deferred.reject(errResponse);
                        }
                    );
                return deferred.promise;
            }
 
            function createUser(user) {
                console.log('Creating User');
                var deferred = $q.defer();
                $http.post(urls.USER_SERVICE_API, user)
                    .then(
                        function (response) {
                            loadAllUsers();
                            deferred.resolve(response.data);
                        },
                        function (errResponse) {
                           console.error('Error while creating User : '+errResponse.data.errorMessage);
                           deferred.reject(errResponse);
                        }
                    );
                return deferred.promise;
            }
 
            function updateUser(user, id) {
                console.log('Updating User with id '+id);
                var deferred = $q.defer();
                $http.put(urls.USER_SERVICE_API + id, user)
                    .then(
                        function (response) {
                            loadAllUsers();
                            deferred.resolve(response.data);
                        },
                        function (errResponse) {
                            console.error('Error while updating User with id :'+id);
                            deferred.reject(errResponse);
                        }
                    );
                return deferred.promise;
            }
 
            function removeUser(id) {
                console.log('Removing User with id '+id);
                var deferred = $q.defer();
                $http.delete(urls.USER_SERVICE_API + id)
                    .then(
                        function (response) {
                            loadAllUsers();
                            deferred.resolve(response.data);
                        },
                        function (errResponse) {
                            console.error('Error while removing User with id :'+id);
                            deferred.reject(errResponse);
                        }
                    );
                return deferred.promise;
            }
 
        }
    ]);

src/main/resources/static/js/UserController.js


'use strict';
 
angular.module('crudApp').controller('UserController',
    ['UserService', '$scope',  function( UserService, $scope) {
 
        var self = this;
        self.user = {};
        self.users=[];
 
        self.submit = submit;
        self.getAllUsers = getAllUsers;
        self.createUser = createUser;
        self.updateUser = updateUser;
        self.removeUser = removeUser;
        self.editUser = editUser;
        self.reset = reset;
 
        self.successMessage = '';
        self.errorMessage = '';
        self.done = false;
 
        self.onlyIntegers = /^\d+$/;
        self.onlyNumbers = /^\d+([,.]\d+)?$/;
 
        function submit() {
            console.log('Submitting');
            if (self.user.id === undefined || self.user.id === null) {
                console.log('Saving New User', self.user);
                createUser(self.user);
            } else {
                updateUser(self.user, self.user.id);
                console.log('User updated with id ', self.user.id);
            }
        }
 
        function createUser(user) {
            console.log('About to create user');
            UserService.createUser(user)
                .then(
                    function (response) {
                        console.log('User created successfully');
                        self.successMessage = 'User created successfully';
                        self.errorMessage='';
                        self.done = true;
                        self.user={};
                        $scope.myForm.$setPristine();
                    },
                    function (errResponse) {
                        console.error('Error while creating User');
                        self.errorMessage = 'Error while creating User: ' + errResponse.data.errorMessage;
                        self.successMessage='';
                    }
                );
        }
 
        function updateUser(user, id){
            console.log('About to update user');
            UserService.updateUser(user, id)
                .then(
                    function (response){
                        console.log('User updated successfully');
                        self.successMessage='User updated successfully';
                        self.errorMessage='';
                        self.done = true;
                        $scope.myForm.$setPristine();
                    },
                    function(errResponse){
                        console.error('Error while updating User');
                        self.errorMessage='Error while updating User '+errResponse.data;
                        self.successMessage='';
                    }
                );
        }
 
        function removeUser(id){
            console.log('About to remove User with id '+id);
            UserService.removeUser(id)
                .then(
                    function(){
                        console.log('User '+id + ' removed successfully');
                    },
                    function(errResponse){
                        console.error('Error while removing user '+id +', Error :'+errResponse.data);
                    }
                );
        }
 
        function getAllUsers(){
            return UserService.getAllUsers();
        }
 
        function editUser(id) {
            self.successMessage='';
            self.errorMessage='';
            UserService.getUser(id).then(
                function (user) {
                    self.user = user;
                },
                function (errResponse) {
                    console.error('Error while removing user ' + id + ', Error :' + errResponse.data);
                }
            );
        }
        function reset(){
            self.successMessage='';
            self.errorMessage='';
            self.user={};
            $scope.myForm.$setPristine(); //reset Form
        }
    }
    ]);