java code:

@Component("authorizationConfig")
@ConfigurationProperties(prefix = "auth")
@RefreshScope
public class AuthProperties {

    public Map<String, Resource> resources;
    public Map<String, Resource> getResources() {
        return resources;
    }

    public void setResources(Map<String, Resource> resources) {
        this.resources = resources;
    }

    /**
     * 验签资源类
     */
    public static class Resource {

        private Set<String> allow;
        private Set<String> forbid;

        public void setAllow(Set<String> allow) {
            this.allow = allow;
        }

        public void setForbid(Set<String> forbid) {
            this.forbid = forbid;
        }
    }
}
Caused by: org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'auth.resources.allow' to java.util.Set<java.lang.String>
    at org.springframework.boot.context.properties.bind.Binder.handleBindError(Binder.java:391)
    at org.springframework.boot.context.properties.bind.Binder.bind(Binder.java:354)
    at org.springframework.boot.context.properties.bind.Binder.lambda$bindDataObject$5(Binder.java:477)
    at org.springframework.boot.context.properties.bind.JavaBeanBinder.bind(JavaBeanBinder.java:100)
    at org.springframework.boot.context.properties.bind.JavaBeanBinder.bind(JavaBeanBinder.java:88)
    at org.springframework.boot.context.properties.bind.JavaBeanBinder.bind(JavaBeanBinder.java:64)
    at org.springframework.boot.context.properties.bind.Binder.lambda$bindDataObject$6(Binder.java:480)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
    at java.base/java.util.AbstractList$RandomAccessSpliterator.tryAdvance(AbstractList.java:706)
    at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:129)
    at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:527)
    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:513)
    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
    at java.base/java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:150)
    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    at java.base/java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:647)
    at org.springframework.boot.context.properties.bind.Binder.fromDataObjectBinders(Binder.java:488)
    at org.springframework.boot.context.properties.bind.Binder.lambda$bindDataObject$7(Binder.java:479)
    at org.springframework.boot.context.properties.bind.Binder$Context.withIncreasedDepth(Binder.java:597)
    at org.springframework.boot.context.properties.bind.Binder$Context.withDataObject(Binder.java:583)
    at org.springframework.boot.context.properties.bind.Binder.bindDataObject(Binder.java:479)
    at org.springframework.boot.context.properties.bind.Binder.bindObject(Binder.java:418)
    at org.springframework.boot.context.properties.bind.Binder.bind(Binder.java:350)
    at org.springframework.boot.context.properties.bind.Binder.lambda$bindAggregate$2(Binder.java:439)
    at org.springframework.boot.context.properties.bind.Binder$Context.withSource(Binder.java:568)
    at org.springframework.boot.context.properties.bind.Binder.lambda$bindAggregate$3(Binder.java:440)
    at org.springframework.boot.context.properties.bind.AggregateElementBinder.bind(AggregateElementBinder.java:39)
    at org.springframework.boot.context.properties.bind.MapBinder$EntryBinder.lambda$bindEntries$0(MapBinder.java:172)
    at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1220)
    at org.springframework.boot.context.properties.bind.MapBinder$EntryBinder.bindEntries(MapBinder.java:172)
    at org.springframework.boot.context.properties.bind.MapBinder.bindAggregate(MapBinder.java:74)
    at org.springframework.boot.context.properties.bind.AggregateBinder.bind(AggregateBinder.java:56)
    at org.springframework.boot.context.properties.bind.Binder.lambda$bindAggregate$4(Binder.java:442)
    at org.springframework.boot.context.properties.bind.Binder$Context.withIncreasedDepth(Binder.java:597)
    at org.springframework.boot.context.properties.bind.Binder.bindAggregate(Binder.java:442)
    at org.springframework.boot.context.properties.bind.Binder.bindObject(Binder.java:403)
    at org.springframework.boot.context.properties.bind.Binder.bind(Binder.java:350)
    at org.springframework.boot.context.properties.bind.Binder.lambda$bindDataObject$5(Binder.java:477)
    at org.springframework.boot.context.properties.bind.JavaBeanBinder.bind(JavaBeanBinder.java:100)
    at org.springframework.boot.context.properties.bind.JavaBeanBinder.bind(JavaBeanBinder.java:88)
    at org.springframework.boot.context.properties.bind.JavaBeanBinder.bind(JavaBeanBinder.java:64)
    at org.springframework.boot.context.properties.bind.Binder.lambda$bindDataObject$6(Binder.java:480)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
    at java.base/java.util.AbstractList$RandomAccessSpliterator.tryAdvance(AbstractList.java:706)
    at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:129)
    at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:527)
    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:513)
    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
    at java.base/java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:150)
    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    at java.base/java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:647)
    at org.springframework.boot.context.properties.bind.Binder.fromDataObjectBinders(Binder.java:488)
    at org.springframework.boot.context.properties.bind.Binder.lambda$bindDataObject$7(Binder.java:479)
    at org.springframework.boot.context.properties.bind.Binder$Context.withIncreasedDepth(Binder.java:597)
    at org.springframework.boot.context.properties.bind.Binder$Context.withDataObject(Binder.java:583)
    at org.springframework.boot.context.properties.bind.Binder.bindDataObject(Binder.java:479)
    at org.springframework.boot.context.properties.bind.Binder.bindObject(Binder.java:418)
    at org.springframework.boot.context.properties.bind.Binder.bind(Binder.java:350)
    at org.springframework.boot.context.properties.bind.Binder.bind(Binder.java:339)
    at org.springframework.boot.context.properties.bind.Binder.bind(Binder.java:269)
    at org.springframework.boot.context.properties.bind.Binder.bind(Binder.java:256)
    at org.springframework.boot.context.properties.ConfigurationPropertiesBinder.bind(ConfigurationPropertiesBinder.java:94)
    at org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor.bind(ConfigurationPropertiesBindingPostProcessor.java:96)
    ... 26 common frames omitted
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.Comparable.compareTo(Object)" because "k1" is null
    at java.base/java.util.TreeMap.compare(TreeMap.java:1569)
    at java.base/java.util.TreeMap.addEntryToEmptyMap(TreeMap.java:776)
    at java.base/java.util.TreeMap.put(TreeMap.java:785)
    at java.base/java.util.TreeMap.put(TreeMap.java:534)
    at java.base/java.util.TreeSet.add(TreeSet.java:255)
    at java.base/java.util.stream.ReduceOps$3ReducingSink.accept(ReduceOps.java:169)
    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)
    at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
    at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762)
    at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276)
    at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
    at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1845)
    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
    at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
    at org.springframework.boot.context.properties.bind.IndexedElementsBinder.assertNoUnboundChildren(IndexedElementsBinder.java:139)
    at org.springframework.boot.context.properties.bind.IndexedElementsBinder.bindIndexed(IndexedElementsBinder.java:113)
    at org.springframework.boot.context.properties.bind.IndexedElementsBinder.bindIndexed(IndexedElementsBinder.java:86)
    at org.springframework.boot.context.properties.bind.IndexedElementsBinder.bindIndexed(IndexedElementsBinder.java:70)
    at org.springframework.boot.context.properties.bind.CollectionBinder.bindAggregate(CollectionBinder.java:48)
    at org.springframework.boot.context.properties.bind.AggregateBinder.bind(AggregateBinder.java:56)
    at org.springframework.boot.context.properties.bind.Binder.lambda$bindAggregate$4(Binder.java:442)
    at org.springframework.boot.context.properties.bind.Binder$Context.withIncreasedDepth(Binder.java:597)
    at org.springframework.boot.context.properties.bind.Binder.bindAggregate(Binder.java:442)
    at org.springframework.boot.context.properties.bind.Binder.bindObject(Binder.java:403)
    at org.springframework.boot.context.properties.bind.Binder.bind(Binder.java:350)
    ... 87 common frames omitted

Comment From: JoePolo

spring boot version: 3.4.3 spring cloud version: 2024.0.0