我正在尝试访问计算机上的http://localhost:8080/EventTracker/greeting。但是，我收到404错误。我正在关注PluralSight Spring MVC4入门教程，看来我的代码与视频中的代码匹配。我正在使用两个Java文件WebConfig和WebAppInitializer来配置我的应用程序。我有什么想念的吗？我想我已经逐行复制，但仍然无法正常工作。
HelloController.java
@Controller
public class HelloController {
@RequestMapping(value="/greeting")
public String sayHello(Model model) {
model.addAttribute("greeting", "Hello World");
return "hello.jsp";
}
}
WebAppInitializer.java
public class WebAppInitializer implements WebApplicationInitializer{
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
WebApplicationContext context = getContext();
servletContext.addListener(new ContextLoaderListener(context) );
ServletRegistration.Dynamic dispatcher = servletContext.addServlet("DispatcherServlet", new DispatcherServlet(context) );
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("*.html");
}
private WebApplicationContext getContext() {
AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
context.setConfigLocation("com.pluralsight.WebConfig");
return context;
}
}
WebConfig.java
@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.pluralsight")
public class WebConfig {
}
hello.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h1>${greeting}</h1>
</body>
</html>
PST编辑于9/15 4:25 PM
使用http://localhost:8080/EventTracker/greeting.html时，仍然出现相同的错误，该错误是：
16:24:41.925 [http-nio-8080-exec-3] DEBUG o.s.web.servlet.DispatcherServlet - DispatcherServlet with name 'DispatcherServlet' processing GET request for [/EventTracker/greeting.html]
16:24:41.931 [http-nio-8080-exec-3] WARN o.s.web.servlet.PageNotFound - No mapping found for HTTP request with URI [/EventTracker/greeting.html] in DispatcherServlet with name 'DispatcherServlet'
16:24:41.931 [http-nio-8080-exec-3] DEBUG o.s.web.servlet.DispatcherServlet - Successfully completed request
最佳答案
因为这是我在Google中找到的第一个问题，在这里没有正确的答案，所以这对我有所帮助。
您应该在下一步中添加WebAppInitializer.java
context.register(com.pluralsight.WebConfig.class);
因此，您的文件应如下所示：
public class WebAppInitializer implements WebApplicationInitializer{
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
WebApplicationContext context = getContext();
servletContext.addListener(new ContextLoaderListener(context) );
ServletRegistration.Dynamic dispatcher = servletContext.addServlet("DispatcherServlet", new DispatcherServlet(context) );
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("*.html");
}
private WebApplicationContext getContext() {
AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
context.setConfigLocation("com.pluralsight.WebConfig");
context.register(com.pluralsight.WebConfig.class);
return context;
}
}