使用 com.luv2code.springsecurity.demo.config.DemoAppConfig 中定义的名称 'viewResolver' 创建 bean 时出错

Question

我在上下文初始化方面遇到了问题。我不使用 xml-配置文件。我想在没有 xml 的情况下进行 spring 配置，但出现错误。请帮忙解决

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'viewResolver' defined in com.luv2code.springsecurity.demo.config.DemoAppConfig: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.ViewResolver]: Factory method 'viewResolver' threw exception; nested exception is java.lang.WhosebugError
    org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:625)
    org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1287)

我的 DemoAppConfig

package com.luv2code.springsecurity.demo.config;

import org.springframework.context.annotation.Bean;
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.EnableWebMvc;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.luv2code.springsecurity.demo")
public class DemoAppConfig {
    
    @Bean
    public ViewResolver viewResolver() {
        
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        
        viewResolver.setPrefix("/WEB-INF/view/");
        viewResolver.setSuffix(".jsp");
        
        return viewResolver();
    }
    
}

我的 WebInit

public class MySpringMvcDisptacherServletInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        // TODO Auto-generated method stub
        return new Class[] {DemoAppConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        // TODO Auto-generated method stub
        return new String[] { "/" };
    }

}

我知道我的问题出在 DemoAppConfig 中，但我就是找不到它。它必须与 Resolver 一起使用。但是我没有得到我想要的结果。

Answer 1

viewResolver() 方法调用自身。这永远不会结束，直到堆栈（跟踪方法调用）耗尽容量——“堆栈溢出”。

请参阅 the answer to "What is a WhosebugError?" 以获得出色的 in-depth 解释。

我想你不想再次调用 viewResolver()，而是想 return 局部变量 viewResolver（注意，这里没有括号）。

Answer 2

尝试return return 视图解析器；代替 return viewResolver();

@Configuration
@EnableWebMvc
@ComponentScan(basePackages="com.luv2code.springsecurity.demo")
public class DemoAppConfig {

    // define a bean for ViewResolver

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

使用 com.luv2code.springsecurity.demo.config.DemoAppConfig 中定义的名称 'viewResolver' 创建 bean 时出错

Error creating bean with name 'viewResolver' defined in com.luv2code.springsecurity.demo.config.DemoAppConfig

java

spring

spring-mvc

javabeans

maven