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Web

在appdot的工程中，选用了SpringMVC 3作为Web层的实现，选用它的原因很多，此处不再详细论述，本质上还是认为它足够简单纯朴。

本章节主要讲述怎样编写Controller和Web页面，当然是以我们要求的方式。

创建PersonControllerTest

测试Spring MVC的程序是很容易的，Spring的Controller是一种轻量化设计，并且Spring也提供了Mock库来方便测试，例如Servlet API的Mock实现。

在src/test/java/**/web目录下，创建PersonControllerTest.java类

package org.appdot.tutorial.web;
 
import org.appdot.test.spring.BaseControllerTestCase;
import org.springframework.beans.factory.annotation.Autowired;
 
import java.util.List;
import java.util.Map;
 
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
 
public class PersonControllerTest extends BaseControllerTestCase {
	@Autowired
	private PersonController controller;

	@Autowired
	private PersonManager personManager;

	

	@Test
	public void testList() {
		Model model = new RedirectAttributesModelMap();
		personController.list(model);
		Assert.assertNotNull(model.asMap().get("personList"));
		Assert.assertFalse(model.asMap().isEmpty());
	}

	@Test
	public void testSavePerson() {
		Person person = personManager.get(-2L);
		person.setFirstName("changed");
		personController.save(person, new RedirectAttributesModelMap());
	}
}

创建支持查询Person的PersonController

在src/main/java/**/web目录下创建PersonController.java类

@Controller
@RequestMapping(value = "/persons")
public class PersonController {

	private PersonManager personManager;

	@RequestMapping(value = { "list", "" })
	public String list(Model model) {
		List<Person> persons = personManager.getAll();
		model.addAttribute("personList", persons);
		return "persons";
	}

	@RequestMapping(value = "save")
	public String save(Person person, RedirectAttributes redirectAttributes) {
		personManager.save(person);
		redirectAttributes.addFlashAttribute("message", "创建新人类" + person.getLoginName() + "成功");
		return "redirect:/persons/";
	}

	@Autowired
	@Qualifier("personManager")
	public void setPersonManager(PersonManager personManager) {
		this.personManager = personManager;
	}
}

运行PersonControllerTest “mvn test -Dtest=PersonControllerTest”

创建persons.jsp页面，展示CRUD的功能

<%@ page contentType="text/html;charset=UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<c:set var="ctx" value="${pageContext.request.contextPath}" />

<head>
<title>人类管理</title>
<meta name="menu" content="SystemManagementMenu" />
</head>


<c:if test="${not empty message}">
	<div id="message" class="alert alert-success">
		<button data-dismiss="alert" class="close">×</button>
		${message}
	</div>
</c:if>

<table id="contentTable" class="table table-striped table-bordered table-condensed">
	<caption>用户列表</caption>
	<thead>
		<tr>
			<th>名字</th>
			<th>姓氏</th>
		</tr>
	</thead>
	<tbody>
		<c:forEach items="${personList}" var="person">
			<tr>
				<td><a href="${ctx}/persons/update/${person.id}" id="editLink-${person.firstName}">${person.firstName}</a></td>
				<td>${person.lastName}</td>
				<td><a href="${ctx}/persons/delete/${person.id}">删除</a></td>
			</tr>
		</c:forEach>
	</tbody>
</table>
<div>
	<a class="btn" href="${ctx}/persons/create">创建人类</a>
</div>

运行 mvn jetty:run 浏览器打开http://localhost:8080/persons

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