stream().sorted()排序报错

Question

{

//对集合就行排序的时候报错
List<CityRainInfoExcelVO> sortList = voList.stream().sorted(Comparator.comparing(CityRainInfoExcelVO::getRainfall).reversed()).collect(Collectors.toList());

// CityRainInfoExcelVO类中实现了Comparable接口，重写了compareTo方法
    @Override
    public int compareTo(@NotNull CityRainInfoExcelVO o) {
        return rainfall.compareTo(o.getRainfall());
    }

java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to com.xxx.xxx.xxx.common.VO.CityRainInfoExcelVO
at java.util.Comparator.lambda$comparing$77a9974f$1(Comparator.java:469)
at java.util.Collections$ReverseComparator2.compare(Collections.java:5232)
at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355)
at java.util.TimSort.sort(TimSort.java:234)
at java.util.Arrays.sort(Arrays.java:1512)
at java.util.stream.SortedOps$SizedRefSortingSink.end(SortedOps.java:348)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:483)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)

Answer 1

Rainfall 属性的排序 和你CityRainInfoExcelVO 啥关系呢。
又不是根据CityRainInfoExcelVO 排序
如果Rainfall 是自定义类，它实现Comparable接口