初识grails的效果

Grails应用实践

最新推荐文章于 2018-05-19 10:24:04 发布

原创最新推荐文章于 2018-05-19 10:24:04 发布 · 555 阅读

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写了个简单的增删查改的demo，用于了解grails的编程思路及风格，也便于自己以后查阅

User.groovy

package com.demo

class User {
	String name
    Integer age
	Date birthday
	
    static constraints = {
		name blank:false
		age blank:false
		birthday blank:false
    }
}

UserController.groovy

package com.demo

import grails.converters.JSON;

class UserController {
	
	def beforeInterceptor = {
		println "Tracing action ${actionUri}"
	}
	
	def index(){}

    def listByServer() { 
		def userList = User.findAll()
		
		render (contentType: "text/html") {
			table (style: "border:1") {
				for (u in userList) {
					tr(
						td(u.id), 
						td(u.name),
						td(u.birthday)
					)
				}
			}
		}
	}
	
	def upload(){
	}
	
	def doUpload() {
		def f = request.getFile('myFile')
		if (f.empty) {
			flash.message = 'file cannot be empty'
			render(view: 'upload')
			return
		}
		f.transferTo(new File('c:/myfile.txt'))
		response.sendError(200, 'Done')
	}
	
	def list(){
		[users : User.list()]
	}
	
	def detail() {
		def userId = request.getParameter("id")
		if (userId == null) {
			flash.message = "input your user id"
			render(view: 'detail')
		} else {
			def user = User.get(userId)
			if (user == null) {
				flash.message = "user does not exist"
				render(view: 'detail')
			} else {
				flash.message = "this user detail is shown as below"
				render (view:"detail", model:[userBean:user])
			}
		}
	}
	
	def edit() {
		def user = User.get(params.id)
		user.name = params.name
		user.birthday = params.birthday
		user.save();
		
		render "edit success"
	}
	
	def delete() {
		def returnMap = ['success':false, 'msg':'']
		def userId = request.getParameter("id")
		if (userId == null) {
			returnMap.msg = "user does not exist"
			render returnMap as JSON
		} else {
			def user = User.get(userId)
			if (user == null) {
				returnMap.msg = "user does not exist"
				render returnMap as JSON
			} else {
				user.delete();
				returnMap.msg = "delete success"
				returnMap.success = true
				render returnMap as JSON
			}
		}
	}
}

list.gsp

<html>
	<head>
		<meta name="layout" content="main">
		<title>Welcome</title>
	</head>
	<body id="welcome">
		<div id="container">
			<table>
				<thead>
					<tr>
						<th>ID</th>
						<th>NAME</th>
						<th>BIRTHDAY</th>
					</tr>
				</thead>
				<tbody>
					<g:each in="${users }" var="user">
						<tr>
							<td>${user.id }</td>
							<td>${user.name }</td>
							<td>${user.birthday }</td>
						</tr>
					</g:each>
				</tbody>
			</table>
		</div>
	</body>
</html>

detail.gsp

<html>
	<head>
		<meta name="layout" content="main">
		<title>Welcome</title>
		<g:javascript>
			function handleDelete(data) {
				$("#message").html(data.msg);
				if (data.success) {
					$("#edit").hide();
				}
			}
		</g:javascript>
	</head>
	<body id="welcome">
		<div id="container">
			<g:form action="detail" >
			<g:textField name="id"/>
			<g:submitButton name="submit"/>
			</g:form>
			${flash.message} <br />
			<g:if test="${userBean != null }">
			<g:formRemote url="[controller: 'user', action: 'edit']" update="message" name="edit">
				<g:textField name="id" value="${userBean.id }"/>
				<g:textField name="name" value="${userBean.name }"/>
				<g:datePicker name="birthday" value="${userBean.birthday }" />
			<input type="submit" value="EDIT" />
			<g:submitToRemote action="delete" onSuccess="handleDelete(data)" value="DELETE" />
			</g:formRemote>
			</g:if>
			<div id="message"></div>
		</div>
	</body>
</html>

效果如下图：