404错误的Spring MVC应用程序
问题描述:
我的Spring版本是5.x,而tomcat版本是8.5,所以根据介绍,他们将支持在没有web.xml的情况下运行的web应用程序,但是我得到了404错误,请参阅下面的项目结构:404错误的Spring MVC应用程序
我用这个URL来访问我的应用程序,但得到404错误:
http://localhost:8080/SpringMVC/
见下面我的代码:
个RootConfig.java:
package spittr.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@Configuration
@ComponentScan(basePackages= {"spitter"},
excludeFilters= {@Filter(type=FilterType.ANNOTATION, value=EnableWebMvc.class)}
)
public class RootConfig {
}
WebConfig.java:
package spittr.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
@Configuration
@EnableWebMvc
@ComponentScan("spittr.web")
public class WebConfig implements WebMvcConfigurer{
public ViewResolver viewResolver()
{
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/views/");
resolver.setSuffix(".jsp");
resolver.setExposeContextBeansAsAttributes(true);
return resolver;
}
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer)
{
configurer.enable();
}
}
SpittrWebAppInitializer.java:
package spittr.config;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
public class SpittrWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
return new Class<?>[] {RootConfig.class};
}
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class<?>[] {WebConfig.class};
}
@Override
protected String[] getServletMappings() {
return new String[] {"/"};
}
}
HomeController.java:
package spittr.web;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
public class HomeController {
@RequestMapping(value="/",method=RequestMethod.GET)
public String home()
{
System.out.println("test");
return "home";
}
}
回到Home.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>this is the Home Jsp page</title>
</head>
<body>
<h1>Hello, Spring MVC!</h1>
</body>
</html>
从Eclipse控制台,我可以看到输出的“测试”,这意味着Spring上下文找出控制器,但似乎无法找到jsp页面,我不知道原因,有人能告诉我我的代码有什么问题吗?
答
尝试在WebConfig#viewResolver()
方法的顶部添加@Bean注释。所以,Spring容器管理你的方法为bean,你的自定义配置可能会起作用。
@Bean
public ViewResolver viewResolver(){}
Indicates that a method produces a bean to be managed by the Spring container.
尝试加入公共的ViewResolver视图解析器()方法的顶部@Bean注解。 –
非常感谢,先生。现在正在工作。 – user2575502
不客气。 –