如何在spring mvc 4中添加resourcehandler 4 java配置

Question

我在spring mvc 4配置文件中添加resourceHandler，但它不起作用。當我加入這個Eclipse IDE中提供了錯誤並顯示提示刪除@覆蓋 這裏是我的代碼

package net.codejava.spring.config; 

import javax.servlet.ServletContext; 
import javax.servlet.ServletException; 
import javax.servlet.ServletRegistration; 

import org.springframework.web.WebApplicationInitializer; 
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext; 
import org.springframework.web.servlet.DispatcherServlet; 

public class SpringWebAppInitializer implements WebApplicationInitializer { 

@Override 
public void onStartup(ServletContext servletContext) throws ServletException { 
    AnnotationConfigWebApplicationContext appContext = new AnnotationConfigWebApplicationContext(); 
    appContext.register(ApplicationContextConfig.class); 

    ServletRegistration.Dynamic dispatcher = servletContext.addServlet(
      "SpringDispatcher", new DispatcherServlet(appContext)); 
    dispatcher.setLoadOnStartup(1); 
    dispatcher.addMapping("/"); 

} 

} 

ApplicationContextConfig：

package net.codejava.spring.config; 

import java.util.Properties; 

import javax.sql.DataSource; 

import net.codejava.spring.dao.UserDAO; 
import net.codejava.spring.dao.UserDAOImpl; 
import net.codejava.spring.model.User; 

import org.apache.commons.dbcp2.BasicDataSource; 
import org.hibernate.SessionFactory; 
import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.context.annotation.Bean; 
import org.springframework.context.annotation.ComponentScan; 
import org.springframework.context.annotation.Configuration; 
import org.springframework.orm.hibernate4.HibernateTransactionManager; 
import org.springframework.orm.hibernate4.LocalSessionFactoryBuilder; 
import org.springframework.transaction.annotation.EnableTransactionManagement; 
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; 
import org.springframework.web.servlet.view.InternalResourceViewResolver; 

@Configuration 
@ComponentScan("net.codejava.spring") 
@EnableTransactionManagement 
public class ApplicationContextConfig { 



public void addResourceHandlers(ResourceHandlerRegistry registry) { 
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/"); 
} 

    @Bean(name = "viewResolver") 
public InternalResourceViewResolver getViewResolver() { 
    InternalResourceViewResolver viewResolver = new InternalResourceViewResolver(); 
    viewResolver.setPrefix("/WEB-INF/views/"); 
    viewResolver.setSuffix(".jsp"); 
    return viewResolver; 
} 


@Bean(name = "dataSource") 
public DataSource getDataSource() { 
    BasicDataSource dataSource = new BasicDataSource(); 
    dataSource.setDriverClassName("com.mysql.jdbc.Driver"); 
    dataSource.setUrl("jdbc:mysql://localhost:3306/usersdb"); 
    dataSource.setUsername("root"); 
    dataSource.setPassword(""); 

    return dataSource; 
} 


private Properties getHibernateProperties() { 
    Properties properties = new Properties(); 
    properties.put("hibernate.show_sql", "true"); 
    properties.put("hibernate.dialect", "org.hibernate.dialect.MySQLDialect"); 
    return properties; 
} 

@Autowired 
@Bean(name = "sessionFactory") 
public SessionFactory getSessionFactory(DataSource dataSource) { 
    LocalSessionFactoryBuilder sessionBuilder = new LocalSessionFactoryBuilder(dataSource); 
    sessionBuilder.addProperties(getHibernateProperties()); 
    sessionBuilder.addAnnotatedClasses(User.class); 
    return sessionBuilder.buildSessionFactory(); 
} 

@Autowired 
@Bean(name = "transactionManager") 
public HibernateTransactionManager getTransactionManager(
     SessionFactory sessionFactory) { 
    HibernateTransactionManager transactionManager = new HibernateTransactionManager(
      sessionFactory); 

    return transactionManager; 
} 

@Autowired 
@Bean(name = "userDao") 
public UserDAO getUserDao(SessionFactory sessionFactory) { 
    return new UserDAOImpl(sessionFactory); 
    } 
} 

，你能解釋我爲什麼上面的類不exteding WebMvcConfigurerAdapter類感謝

Answer 1

您需要添加extends WebMvcConfigurerAdapter您ApplicationContextConfig類的定義，那麼你可以重寫/添加資源的處理程序

@Configuration 
@ComponentScan("net.codejava.spring") 
@EnableTransactionManagement 
public class ApplicationContextConfig extends WebMvcConfigurerAdapter { 


@Override 
public void addResourceHandlers(ResourceHandlerRegistry registry) { 
    registry.addResourceHandler("/images/**") 
      .addResourceLocations("classpath:/META-INF/resources/images/"); 
}