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HoweChen/TransferKeysInMapToUppercase.java

Created December 18, 2019 07:02
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[转换Map里的所有key变为大写]#Java
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TransferKeysInMapToUppercase.java
Map<String, List<Long>> capitalKeyToValueMap = procDefInfoDto.getPermissionToRole()
.entrySet()
.stream()
.collect(Collectors.toMap(stringListEntry -> stringListEntry.getKey().toUpperCase(), Map.Entry::getValue));
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