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!502 在CollectorUtil提交Collectors.toMap的对null友好实现，避免NPE

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Merge pull request !502 from 阿超/v5-dev
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Looly
2022-01-15 05:28:11 +00:00
committed by Gitee
parent da4d64fcbc 78ac9fcdef
commit 05ebfb44a9
3 changed files with 83 additions and 9 deletions
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7
hutool-core/src/test/java/cn/hutool/core/collection/CollStreamUtilTest.java
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@@ -150,6 +150,13 @@ public class CollStreamUtilTest {
compare.put(2L, map2);
Assert.assertEquals(compare, map);
// 对null友好
Map<Long, Map<Long, Student>> termIdClassIdStudentMap = CollStreamUtil.group2Map(Arrays.asList(null, new Student(2, 2, 1, "王五")), Student::getTermId, Student::getClassId);
Map<Long, Map<Long, Student>> termIdClassIdStudentCompareMap = new HashMap<Long, Map<Long, Student>>() {{
put(null, MapUtil.of(null, null));
put(2L, MapUtil.of(2L, new Student(2, 2, 1, "王五")));
}};
Assert.assertEquals(termIdClassIdStudentCompareMap, termIdClassIdStudentMap);
}
@Test