创建名为“defaultServletHandlerMapping”的 bean 时出错

Posted 2023-02-26

【中文标题】创建名为“defaultServletHandlerMapping”的 bean 时出错

【英文标题】：Error creating bean with name 'defaultServletHandlerMapping

【发布时间】：2016-04-04 00:29:40

【问题描述】：

这是一个spring（带有spring security）+java+maven在eclipse上的应用。提交注册表单时遇到以下错误。随后查看我的其余文件：

HTTP Status 500 - Request processing failed; nested exception is 
org.springframework.beans.factory.BeanCreationException:
 Error creating bean with name 'defaultServletHandlerMapping' defined in class 
org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration: 
Bean instantiation via factory method failed; nested exception is 
org.springframework.beans.BeanInstantiationException: Failed to instantiate 
[org.springframework.web.servlet.HandlerMapping]:
 Factory method 'defaultServletHandlerMapping'
 threw exception; nested exception is java.lang.IllegalArgumentException:
 A ServletContext is required to configure default servlet handling

我的文件：

AppInit

package com.myapp.config;

import org.springframework.security.web.context.*;

public class AppInit       extends AbstractSecurityWebApplicationInitializer                    

MyApp 配置文件：

package com.myapp.config;

import org.springframework.context.annotation.Bean;
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.jdbc.datasource.DriverManagerDataSource;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
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;

import com.myapp.JDBC.EmailJDBC;
import com.myapp.JDBC.LastIdJDBC;
import com.myapp.JDBC.LoginJDBC;
import com.myapp.JDBC.PersonJDBC;

@EnableWebMvc //mvc:annotation-driven
@Configuration

@ComponentScan(basePackages = "com.myapp" )//, excludeFilters =  
//@Filter(type = FilterType.ANNOTATION, value = Configuration.class) )

public class myappConfig extends WebMvcConfigurerAdapter 

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) 
        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
    

    @Bean
    public InternalResourceViewResolver viewResolver() 
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setViewClass(JstlView.class);
        viewResolver.setPrefix("/WEB-INF/views/jsp/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    

    @Bean
    public DriverManagerDataSource getDatasource()
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setPassword("1234567");
        dataSource.setUrl("jdbc:mysql://localhost:3306/myapp");
        dataSource.setUsername("root");
        return dataSource;
    
    @Bean
    public LoginJDBC getLoginBean()
        LoginJDBC bean = new LoginJDBC();
        bean.setDataSource(new myappConfig().getDatasource());
        return bean;
    
    @Bean
    public PersonJDBC getPersonBean()
        PersonJDBC bean = new PersonJDBC();
        bean.setDataSource(new myappConfig().getDatasource());
        return bean;
    
    @Bean
    public EmailJDBC getEmailBean()
        EmailJDBC bean = new EmailJDBC();
        bean.setDataSource(new myappConfig().getDatasource());
        return bean;
    
    @Bean
    public LastIdJDBC getLastIdBean()
        LastIdJDBC bean = new LastIdJDBC();
        bean.setDataSource(new myappConfig().getDatasource());
        return bean;
    

WebInit 文件：

package com.myapp.config;

import javax.servlet.Filter;

import org.springframework.core.annotation.Order;
import org.springframework.web.filter.HiddenHttpMethodFilter;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;


public class myappWebInit extends
        AbstractAnnotationConfigDispatcherServletInitializer 

    @Override
    protected Class<?>[] getServletConfigClasses() 
        return new Class[]  myappConfig.class ;
    

    @Override
    protected String[] getServletMappings() 
        return new String[]  "/","/login", "/signuPerson","/regPerson","/regPersonSuccess" ;
    

    @Override
    protected Class<?>[] getRootConfigClasses() 
        return new Class[]  RootConfiguration.class ;
    
    @Override
    protected Filter[] getServletFilters() 
        return new Filter[]  new HiddenHttpMethodFilter() ;
    

安全配置文件：

package com.myapp.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.*;
import org.springframework.security.web.csrf.CsrfTokenRepository;
import org.springframework.security.web.csrf.HttpSessionCsrfTokenRepository;

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled=true)
public class SecurityConfig extends WebSecurityConfigurerAdapter
    @Autowired
    private CsrfTokenRepository csrfTokenRepository() 
     
        HttpSessionCsrfTokenRepository repository = new HttpSessionCsrfTokenRepository(); 
        repository.setSessionAttributeName("_csrf");
        return repository; 
    

    @Override
    protected void configure(HttpSecurity http) throws Exception 

    http
        .csrf()
            .csrfTokenRepository(csrfTokenRepository())
            .and()
        .authorizeRequests()
            .antMatchers("/resources/**", "/signuPerson").permitAll()
            .anyRequest().authenticated()
            .and()
        .formLogin()
            .loginPage("/login")
            //.failureUrl(authenticationFailureUrl)
            .permitAll()
            .and()
        .logout()
            .permitAll();


    
    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception 
        auth
            .inMemoryAuthentication()
                .withUser("user").password("password").roles("USER");
    

我很抱歉放了很多东西。我已经尝试过解决与此类似的问题，但它没有锻炼。任何提示将不胜感激。提前致谢！

【问题讨论】：

尝试删除文件 AppInit 并重建您的应用程序！告诉我它是否有帮助！

@Mr.Arjun 我试过了，但问题没有解决。我想问题出在注册控制器的级别。不知何故，请求处理程序没有很好地定义。但我不知道该怎么做。此外，我找不到程序试图创建和实例化的“defaultHandlerBean”。谢谢！

【参考方案1】：

我在此平台上类似问题的解决方案的帮助下解决了这个问题。

我通过在 myappconfig 文件中添加以下注释来排除配置过滤器的扫描：

@EnableWebMvc 
@Configuration
@ComponentScan(
  basePackages = "com.myapp" , 
  excludeFilters =  
    @Filter(type = FilterType.ANNOTATION, value = Configuration.class)
  
)

这样做之后，问题并没有解决。

然后我删除了@EnableWebMvc 并放入 myappinit 文件，问题就解决了。

我的猜测是 @EnableWebMvc 和 @ComponentScan(basePackages = "com.myapp" , excludeFilters = @Filter(type = FilterType.ANNOTATION, value = Configuration.class) ) 不应该在同一个配置文件中。