При попытке сделать простую программу для Spring MVC я всегда получал одну и ту же ошибку при запуске http://localhost:8080/project_name/:
404 - the requested resource is not available
Это архитектурный проект:
src
| +--com
| +--memorynotfound
| +--config
| |--ServletInitializer.java
| |--WebConfig.java
| +--controller
| |--HomeController.java
| +--resources
| +--webapp
| +--WEB-INF
| +--views
| |--index.jsp
Вот файлы в пакете com.memorynotfound.config
:
ServletInitializer.java
package com.memorynotfound.config;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
public class ServletInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class[] { WebConfig.class };
}
@Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
@Override
protected Class<?>[] getRootConfigClasses() {
return null;
}
}
WebConfig.java
package com.memorynotfound.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;
@Configuration
@EnableWebMvc
@ComponentScan(basePackages="com.memorynotfound")
public class WebConfig extends WebMvcConfigurerAdapter {
@Bean
public InternalResourceViewResolver viewResolver(){
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setViewClass(JstlView.class);
viewResolver.setPrefix("/WEB-INF/views/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
}
Файлы в пакете com.memorynotfound.controller
:
HomeController.java
package com.memorynotfound.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.ui.ModelMap;
@Controller
@RequestMapping("/")
public class HomeController {
@RequestMapping(method = RequestMethod.GET)
public String index(ModelMap model){
System.out.println("This is a test ================>");
model.addAttribute("message", "Spring MVC Java Configuration Example");
return "index";
}
}
И, наконец, файл Jsp:
index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Spring MVC Java Configuration Example</title>
</head>
<body>
${message}
</body>
</html>