Spring Boot 之整合 EasyUI 打造 Web 应用
SpringBootTutorial :: Web :: UI :: EasyUI
EasyUI 是一个简单的用户界面组件的集合。由于 EasyUI 已经封装好大部分 UI 基本功能,能帮用户减少大量的 js 和 css 代码。所以,EasyUI 非常适合用于开发简单的系统或原型系统。
本文示例使用技术点:
Spring Boot:主要使用了 spring-boot-starter-web、spring-boot-starter-data-jpa
EasyUI:按需加载,并没有引入所有的 EasyUI 特性
数据库:为了测试方便,使用 H2
简介
什么是 EasyUI?
easyui 是基于 jQuery、Angular.、Vue 和 React 的用户界面组件的集合。
easyui 提供了构建现代交互式 javascript 应用程序的基本功能。
使用 easyui,您不需要编写许多 javascript 代码,通常通过编写一些 HTML 标记来定义用户界面。
完整的 HTML5 网页框架。
使用 easyui 开发你的产品时可以大量节省你的时间和规模。
easyui 使用非常简单但功能非常强大。
Spring Boot 整合 EasyUI
配置
application.properties 修改:
spring.mvc.view.prefix = /views/spring.mvc.view.suffix = .html
引入 easyui
EasyUI 下载地址:http://www.jeasyui.cn/download.html
在 src/main/resources/static
目录下引入 easyui。
然后在 html 中引用:
<!DOCTYPE html><html> <head> <meta charset="UTF-8" /> <link rel="stylesheet" type="text/css" href="../lib/easyui/themes/bootstrap/easyui.css" /> <link rel="stylesheet" type="text/css" href="../lib/easyui/themes/icon.css" /> <link rel="stylesheet" type="text/css" href="../lib/easyui/themes/color.css" /> <script type="text/javascript" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="../lib/easyui/jquery.min.js"></script> <script type="text/javascript" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="../lib/easyui/jquery.easyui.min.js" ></script> <script type="text/javascript" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="../lib/easyui/locale/easyui-lang-zh_CN.js" ></script> </head> <body> <!-- 省略 --> </body></html>
引入 easyui 后,需要使用哪种组件,可以查看相关文档或 API,十分简单,此处不一一赘述。
实战
引入 maven 依赖
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </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-tomcat</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> </dependency> <dependency> <groupId>commons-collections</groupId> <artifactId>commons-collections</artifactId> <version>3.2.2</version> </dependency> </dependencies>
使用 JPA
为了使用 JPA 技术访问数据,我们需要定义 Entity 和 Repository
定义一个 Entity:
@Entitypublic class User { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; private String firstName; private String lastName; private String phone; private String email; protected User() {} public User(String firstName, String lastName, String phone, String email) { this.firstName = firstName; this.lastName = lastName; this.phone = phone; this.email = email; } // 略 getter/setter}
定义一个 Repository:
public interface UserRepository extends CrudRepository<User, Long> { List<User> findByLastName(String lastName); }
使用 Web
首页 Controller,将 web 请求定向到指定页面(下面的例子定向到 index.html)
@Controllerpublic class IndexController { @RequestMapping(value = {"", "/", "index"}) public String index() { return "index"; } }
此外,需要定义一个 Controller,提供后台的 API 接口
@Controllerpublic class UserController { @Autowired private UserRepository customerRepository; @RequestMapping(value = "/user", method = RequestMethod.GET) public String user() { return "user"; } @ResponseBody @RequestMapping(value = "/user/list") public ResponseDTO<User> list() { Iterable<User> all = customerRepository.findAll(); List<User> list = IteratorUtils.toList(all.iterator()); return new ResponseDTO<>(true, list.size(), list); } @ResponseBody @RequestMapping(value = "/user/add") public ResponseDTO<User> add(User user) { User result = customerRepository.save(user); List<User> list = new ArrayList<>(); list.add(result); return new ResponseDTO<>(true, 1, list); } @ResponseBody @RequestMapping(value = "/user/save") public ResponseDTO<User> save(@RequestParam("id") Long id, User user) { user.setId(id); customerRepository.save(user); List<User> list = new ArrayList<>(); list.add(user); return new ResponseDTO<>(true, 1, list); } @ResponseBody @RequestMapping(value = "/user/delete") public ResponseDTO delete(@RequestParam("id") Long id) { customerRepository.deleteById(id); return new ResponseDTO<>(true, null, null); } }
使用 EasyUI
接下来,我们要使用前面定义的后台接口,仅需要在 EasyUI API 中指定 url
即可。
请留意下面示例中的 url 字段,和实际接口是一一对应的。
<!DOCTYPE html><html> <head> <title>Complex Layout - jQuery EasyUI Demo</title> <meta charset="UTF-8" /> <link rel="stylesheet" type="text/css" href="../lib/easyui/themes/bootstrap/easyui.css" /> <link rel="stylesheet" type="text/css" href="../lib/easyui/themes/icon.css" /> <link rel="stylesheet" type="text/css" href="../lib/easyui/themes/color.css" /> <script type="text/javascript" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="../lib/easyui/jquery.min.js"></script> <script type="text/javascript" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="../lib/easyui/jquery.easyui.min.js" ></script> <script type="text/javascript" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="../lib/easyui/locale/easyui-lang-zh_CN.js" ></script> <style type="text/css"> body { font-family: microsoft yahei; } </style> </head> <body> <div style="width:100%"> <h2>基本的 CRUD 应用</h2> <p>数据来源于后台系统</p> <table id="dg" title="Custom List" class="easyui-datagrid" url="/user/list" toolbar="#toolbar" pagination="true" rownumbers="true" fitColumns="true" singleSelect="true" > <thead> <tr> <th field="id" width="50">ID</th> <th field="firstName" width="50">First Name</th> <th field="lastName" width="50">Last Name</th> <th field="phone" width="50">Phone</th> <th field="email" width="50">Email</th> </tr> </thead> </table> <div id="toolbar"> <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-add" plain="true" onclick="newUser()" >添加</a > <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-edit" plain="true" onclick="editUser()" >修改</a > <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-remove" plain="true" onclick="destroyUser()" >删除</a > </div> <div id="dlg" class="easyui-dialog" style="width:400px" data-options="closed:true,modal:true,border:'thin',buttons:'#dlg-buttons'" > <form id="fm" method="post" novalidate style="margin:0;padding:20px 50px" > <h3>User Information</h3> <div style="margin-bottom:10px"> <input name="firstName" class="easyui-textbox" required="true" label="First Name:" style="width:100%" /> </div> <div style="margin-bottom:10px"> <input name="lastName" class="easyui-textbox" required="true" label="Last Name:" style="width:100%" /> </div> <div style="margin-bottom:10px"> <input name="phone" class="easyui-textbox" required="true" label="Phone:" style="width:100%" /> </div> <div style="margin-bottom:10px"> <input name="email" class="easyui-textbox" required="true" validType="email" label="Email:" style="width:100%" /> </div> </form> </div> <div id="dlg-buttons"> <a href="javascript:void(0)" class="easyui-linkbutton c6" iconCls="icon-ok" onclick="saveUser()" style="width:90px" >Save</a > <a href="javascript:void(0)" class="easyui-linkbutton" iconCls="icon-cancel" onclick="javascript:$('#dlg').dialog('close')" style="width:90px" >Cancel</a > </div> </div> <script type="text/javascript"> var url; function newUser() { $('#dlg') .dialog('open') .dialog('center') .dialog('setTitle', 'New User'); $('#fm').form('clear'); url = '/user/add'; } function editUser() { var row = $('#dg').datagrid('getSelected'); if (row) { $('#dlg') .dialog('open') .dialog('center') .dialog('setTitle', 'Edit User'); $('#fm').form('load', row); url = '/user/save'; } } function saveUser() { $('#fm').form('submit', { url: url, onSubmit: function() { return $(this).form('validate'); }, success: function(result) { var result = eval('(' + result + ')'); if (result.errorMsg) { $.messager.show({ title: 'Error', msg: result.errorMsg }); } else { $('#dlg').dialog('close'); // close the dialog $('#dg').datagrid('reload'); // reload the user data } } }); } function destroyUser() { var row = $('#dg').datagrid('getSelected'); if (row) { $.messager.confirm( 'Confirm', 'Are you sure you want to destroy this user?', function(r) { if (r) { $.post( '/user/delete', { id: row.id }, function(result) { if (result.success) { $('#dg').datagrid('reload'); // reload the user data } else { $.messager.show({ // show error message title: 'Error', msg: result.errorMsg }); } }, 'json' ); } } ); } } </script> </body></html>
完整示例
请参考 源码
运行方式:
mvn clean package -DskipTests=truejava -jar target/
在浏览器中访问:http://localhost:8080/
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作者:静默虚空
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