时间:2021-07-01 10:21:17 帮助过:6人阅读
前端框架分段繁杂,框架本身也是日新月异,但是不免还是有很多好的框架,例如jQuery,但是jQuery本身的很多类库有比较杂乱,AngularJs和jQuery都作为前端框架,都有自己适合的场景,本文主要讲解AngularJs和SpringMvc的整合,代码来自于GitHub,自己下载下来看了一下,写点自己对于整合的理解。
目录
1.为什么使用AngularJs
2.SpringMvc和AngularJs整合使用
3.总结
一、为什么要使用AngulaJs
AngularJS通过为开发者呈现一个更高层次的抽象来简化应用的开发。如同其他的抽象技术一样,这也会损失一部分灵活性。换句话说,并不是所有的应用都适合用AngularJS来做。AngularJS主要考虑的是构建CRUD应用。幸运的是,至少90%的WEB应用都是CRUD应用。
二、SpringMvc和AngularJs整合使用
项目结构
使用JavaConfig配置Spring
使用thymeleaf作为模板代替JSP
使用BootStrap
使用AngularJs
使用JavaConfig配置Spring
public class AppInitializer implements WebApplicationInitializer { public void onStartup(ServletContext servletContext) throws ServletException { AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext(); rootContext.register(AppConfig.class); servletContext.addListener(new ContextLoaderListener(rootContext)); AnnotationConfigWebApplicationContext dispatcherContext = new AnnotationConfigWebApplicationContext(); dispatcherContext.register(WebMvcConfig.class); ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", new DispatcherServlet(dispatcherContext)); dispatcher.setLoadOnStartup(1); dispatcher.addMapping("/"); } }
这个配置类是用来代替web.xml文件的,主要是注册监听器,Web的相关配置
包含了AppConfig和WebMvcConfig两个类
@Configuration@EnableWebMvc@ComponentScan(basePackages = "com.xvitcoder.springmvcangularjs")@Import({ThymeleafConfig.class})public class WebMvcConfig extends WebMvcConfigurerAdapter { @Override public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) { configurer.enable(); } @Override public void addResourceHandlers(final ResourceHandlerRegistry registry) { registry.addResourceHandler("/resources/**").addResourceLocations("/resources/"); } @Override public void configureMessageConverters(List<HttpMessageConverter<?>> converters) { converters.add(new MappingJackson2HttpMessageConverter()); super.configureMessageConverters(converters); } }
继承了WebMvcConfigurerAdapter
重写了三个方法,分别配置了Handler,资源拦截和Converter
@Configurationpublic class ThymeleafConfig { @Bean public ServletContextTemplateResolver templateResolver() { ServletContextTemplateResolver resolver = new ServletContextTemplateResolver(); resolver.setPrefix("/WEB-INF/html/"); resolver.setSuffix(".html"); resolver.setTemplateMode("HTML5"); resolver.setCacheable(false); return resolver; } @Bean public SpringTemplateEngine templateEngine() { SpringTemplateEngine engine = new SpringTemplateEngine(); engine.setTemplateResolver(templateResolver()); return engine; } @Bean public ThymeleafViewResolver thymeleafViewResolver() { ThymeleafViewResolver resolver = new ThymeleafViewResolver(); resolver.setTemplateEngine(templateEngine()); return resolver; } }
这里配置Thymeleaf模板
AngularJs的使用
项目结构
重点解释下这里面的东西,在IndexController中默认会将页面跳转到index.html页面,index.html页面时这样的:
<!doctype html><html lang="en" ng-app="AngularSpringApp"><head> <meta charset="utf-8"/> <title>Service App</title> <link rel="stylesheet" href="resources/css/app.css"/> <link rel="stylesheet" href="resources/bootstrap/css/bootstrap.min.css" /></head><body><div id="wrapper"> <ul class="menu"> <li><a href="#/cars">Cars</a></li> <li><a href="#/trains">Trains</a></li> <li><a href="#/railwaystations">Railway Station</a></li> </ul> <hr class="" /> <div ng-view=""></div></div><script src="resources/js/lib/angular/angular.js"></script><script src="resources/js/app.js"></script><script src="resources/js/services.js"></script><script src="resources/js/controllers/RailwayStationController.js"></script><script src="resources/js/controllers/CarController.js"></script><script src="resources/js/controllers/TrainController.js"></script><script src="resources/js/filters.js"></script><script src="resources/js/directives.js"></script></body>
这里引入了很多js文件
注意<html ng-app="AngularSpringApp">
这是AngularJs的执行流程:从index.html开始,找到app.js文件,从app.js文件中根据路径找到相应的controller.js文件,controller.js文件将从后台获得数据返回到相应的html页面进行展示
模块是angularJs很重要的概念
var AngularSpringApp = {}; var App = angular.module('AngularSpringApp', ['AngularSpringApp.filters', 'AngularSpringApp.services', 'AngularSpringApp.directives']);// Declare app level module which depends on filters, and servicesApp.config(['$routeProvider', function ($routeProvider) { $routeProvider.when('/cars', { templateUrl: 'cars/layout', controller: CarController }); $routeProvider.when('/trains', { templateUrl: 'trains/layout', controller: TrainController }); $routeProvider.when('/railwaystations', { templateUrl: 'railwaystations/layout', controller: RailwayStationController }); $routeProvider.otherwise({redirectTo: '/cars'}); }]);
根据路径找到相应的controller和template模板
var CarController = function($scope, $http) { $scope.fetchCarsList = function() { $http.get('cars/carlist.json').success(function(carList){ $scope.cars = carList; }); }; $scope.addNewCar = function(newCar) { $http.post('cars/addCar/' + newCar).success(function() { $scope.fetchCarsList(); }); $scope.carName = ''; }; $scope.removeCar = function(car) { $http.delete('cars/removeCar/' + car).success(function() { $scope.fetchCarsList(); }); }; $scope.removeAllCars = function() { $http.delete('cars/removeAllCars').success(function() { $scope.fetchCarsList(); }); }; $scope.fetchCarsList(); };
使用$http服务向后台发送ajax请求,获取数据
<div class="input-append"> <input style="width:358px; margin-left: 100px;" class="span2" type="text" ng-model="carName" required="required" min="1" /> <button class="btn btn-primary" ng-disabled="!carName" ng-click="addNewCar(carName)">Add Car</button></div><h3 style="margin-left:100px;">Car List</h3><div class="alert alert-info" style="width:400px;margin-left:100px;" ng-show="cars.length == 0"> No cars found</div><table class="table table-bordered table-striped" style="width:450px; margin-left: 100px;" ng-show="cars.length > 0"> <thead> <tr> <th style="text-align: center; width: 25px;">Action</th> <th style="text-align: center;">Car Name</th> </tr> </thead> <tbody> <tr ng-repeat="car in cars"> <td style="width:70px;text-align:center;"><button class="btn btn-mini btn-danger" ng-click="removeCar(car)">Remove</button></td> <td>{{car}}</td> </tr> </tbody></table><button style="margin-left:100px;" class="btn btn-danger" ng-show="cars.length > 1" ng-click="removeAllCars()">Remove All Cars</button>
使用相应的标签接收数据和控制显示等操作
三、 总结
界面有点朴素,但是无法掩饰AngularJs带来的这种方便快捷的操作,我们不需要在过度关注DOM操作,这种从前端引入后端的思想也是一次创新,目前我也只是懂点皮毛,很多理念和用法也不会使用,这篇文章算是给AngularJs开个头。
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