我开始学习Spring MVC，并且在开发项目时遇到了一些问题。我的控制器类能够处理第一个请求“ /”并提供给我主页。从主页上单击href我要重定向到另一个页面，即ContactForm。我在控制器类中定义相同的内容。
在控制器类和JSP页面下面。
Home.jsp
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Contact Manager Home</title>
</head>
<body>
<div align="center">
<h1>Contact List</h1>
<h3><a href="/newContact">New Contact</a></h3>
<table border="1">
<th>No</th>
<th>Name</th>
<th>Email</th>
<th>Address</th>
<th>Telephone</th>
<th>Action</th>
<c:forEach var="contact" items="${listContact}" varStatus="status">
<tr>
<td>${status.index + 1}</td>
<td>${contact.name}</td>
<td>${contact.email}</td>
<td>${contact.address}</td>
<td>${contact.telephone}</td>
<td>
<a href="/editContact?id=${contact.id}">Edit</a>
<a href="/deleteContact?id=${contact.id}">Delete</a>
</td>
</tr>
</c:forEach>
</table>
</div>
</body>
</html>
ContactForm.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>New/Edit Contact</title>
</head>
<body>
<div align="center">
<h1>New/Edit Contact</h1>
<form:form action="saveContact" method="post" modelAttribute="contact">
<table>
<form:hidden path="id"/>
<tr>
<td>Name:</td>
<td><form:input path="name" /></td>
</tr>
<tr>
<td>Email:</td>
<td><form:input path="email" /></td>
</tr>
<tr>
<td>Address:</td>
<td><form:input path="address" /></td>
</tr>
<tr>
<td>Telephone:</td>
<td><form:input path="telephone" /></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="Save"></td>
</tr>
</table>
</form:form>
</div>
</body>
</html>
控制器类
@Controller
public class HomeController {
@Autowired
private ContactDAO contactDAO;
@RequestMapping(value = "/")
public ModelAndView listContact(ModelAndView model) throws IOException{
List<Contact> listContact = contactDAO.list();
model.addObject("listContact", listContact);
model.setViewName("home");
return model;
}
@RequestMapping(value = "/newContact", method = RequestMethod.GET)
public ModelAndView newContact(ModelAndView model) {
Contact newContact = new Contact();
model.addObject("contact", newContact);
model.setViewName("ContactForm");
return model;
}
@RequestMapping(value = "/saveContact", method = RequestMethod.POST)
public ModelAndView saveContact(@ModelAttribute Contact contact) {
contactDAO.saveOrUpdate(contact);
return new ModelAndView("redirect:/");
}
@RequestMapping(value = "/deleteContact", method = RequestMethod.GET)
public ModelAndView deleteContact(HttpServletRequest request) {
int contactId = Integer.parseInt(request.getParameter("id"));
contactDAO.delete(contactId);
return new ModelAndView("redirect:/");
}
@RequestMapping(value = "/editContact", method = RequestMethod.GET)
public ModelAndView editContact(HttpServletRequest request) {
int contactId = Integer.parseInt(request.getParameter("id"));
Contact contact = contactDAO.get(contactId);
ModelAndView model = new ModelAndView("ContactForm");
model.addObject("contact", contact);
return model;
}
请提供您的宝贵建议。提前致谢
您正在犯一个根本性的错误。假设您的项目名称为neeraj-proj，因此访问的网址为localhost:8080/neeraj-proj。当您点击link时<h3><a href="/newContact"></h3>，实际上是在点击localhost:8080/newContact而不是localhost:8080/neeraj-proj/newContact
解决方法是简单地将a附加
.到您的所有href links。例如<h3><a href="./newContact">New Contact</a></h3>注意：浏览器认为
localhost:8080是base url或host url。
相似地 <a href="./editContact?id=${contact.id}">Edit</a>
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