springboot启动时过滤不需要注入的类

Posted 2021-01-30 蓝团青

在springbootApplication启动类上加入注解

@ComponentScan(excludeFilters = @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = XX.class))

 

 

 

public @interface ComponentScan {
    .....................
    /**
     * Specifies which types are not eligible for component scanning.
     * @see #resourcePattern
     */
    Filter[] excludeFilters() default {};

    .........................
    /**
     * Declares the type filter to be used as an {@linkplain ComponentScan#includeFilters
     * include filter} or {@linkplain ComponentScan#excludeFilters exclude filter}.
     */
    @Retention(RetentionPolicy.RUNTIME)
    @Target({})
    @interface Filter {

        /**
         * The type of filter to use.
         * <p>Default is {@link FilterType#ANNOTATION}.
         * @see #classes
         * @see #pattern
         */
        FilterType type() default FilterType.ANNOTATION;
        ...........................
    }
}

其中@ComponentScan 注解属性excludeFilters可以过滤多个类型的类的加载,其中有内部类,可以指定过滤的类型,上面是指定class文件进行过滤,也可以指定其他类型的

public enum FilterType {

    /**
     * Filter candidates marked with a given annotation.
     * @see org.springframework.core.type.filter.AnnotationTypeFilter
     */
    ANNOTATION,

    /**
     * Filter candidates assignable to a given type.
     * @see org.springframework.core.type.filter.AssignableTypeFilter
     */
    ASSIGNABLE_TYPE,

    /**
     * Filter candidates matching a given AspectJ type pattern expression.
     * @see org.springframework.core.type.filter.AspectJTypeFilter
     */
    ASPECTJ,

    /**
     * Filter candidates matching a given regex pattern.
     * @see org.springframework.core.type.filter.RegexPatternTypeFilter
     */
    REGEX,

    /** Filter candidates using a given custom
     * {@link org.springframework.core.type.filter.TypeFilter} implementation.
     */
    CUSTOM

}