Java Spring缓存在doFilter中不工作

如果从doFilter调用，则Spring缓存不工作

请注意，如果不是从doFilter（）调用，Spring缓存将工作（例如，如果是从rest服务调用）

如何在doFilter（）中启用缓存？（doFilter中可能不允许缓存？）

@配置
@启用缓存
公共类CredentialsInjectionFilter实现javax.servlet.Filter{
@豆子
公共缓存管理器缓存管理器（）{
SimpleCacheManager cacheManager=新的SimpleCacheManager（）；
cacheManager.setCaches（Arrays.asList(
新的ConcurrentMapCache（“租户”）
));
返回缓存管理器；
}
@凌驾
public void doFilter（ServletRequest ServletRequest、ServletResponse ServletResponse、FilterChain FilterChain）
抛出IOException、ServletException{
显示器（5）；
doFilter（servletRequest，servletResponse）；
}
@可缓存（“租户”）
公共无效显示（整数）{
//如果缓存工作正常，则在第一次调用后将不会执行下面的代码
对于（inti=0；i如何扩展org.springframework.web.filter.GenericFilterBean，并将缓存细节移动到单独的服务类中

缓存服务

import java.util.Arrays;

import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.cache.concurrent.ConcurrentMapCache;
import org.springframework.cache.support.SimpleCacheManager;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

    @Component
    public class CacheService{

        @Bean
        public CacheManager cacheManager() {
            SimpleCacheManager cacheManager = new SimpleCacheManager();
            cacheManager.setCaches(Arrays.asList(
                    new ConcurrentMapCache("tenants")               
                ));
            return cacheManager;
        }


        @Cacheable("tenants")
        public void display(int number) {
            // if cache working properly, code below will not execute after the first calling
            for(int i=0; i<50; i++) {   
                   System.out.println("ramon called" +number);
            }
        }
    }

您正在将@Cacheable应用于一个不返回任何内容（void返回类型）的方法。在这种情况下，您希望发生什么？
import java.util.Arrays;

import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.cache.concurrent.ConcurrentMapCache;
import org.springframework.cache.support.SimpleCacheManager;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

    @Component
    public class CacheService{

        @Bean
        public CacheManager cacheManager() {
            SimpleCacheManager cacheManager = new SimpleCacheManager();
            cacheManager.setCaches(Arrays.asList(
                    new ConcurrentMapCache("tenants")               
                ));
            return cacheManager;
        }


        @Cacheable("tenants")
        public void display(int number) {
            // if cache working properly, code below will not execute after the first calling
            for(int i=0; i<50; i++) {   
                   System.out.println("ramon called" +number);
            }
        }
    }

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.filter.GenericFilterBean;

@Component
public class CredentialsInjectionFilter extends GenericFilterBean {

    @Autowired
    private CacheService cacheService;

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
    throws IOException, ServletException {
        cacheService.display(5);
        filterChain.doFilter(servletRequest, servletResponse);
    }
}