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https://gitee.com/dromara/RuoYi-Cloud-Plus.git
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update 优化 StreamUtils 方法过滤null值
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@@ -2,7 +2,6 @@ package com.ruoyi.common.core.utils;
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import cn.hutool.core.collection.CollUtil;
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import cn.hutool.core.map.MapUtil;
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import cn.hutool.core.util.StrUtil;
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import lombok.AccessLevel;
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import lombok.NoArgsConstructor;
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@@ -31,6 +30,7 @@ public class StreamUtils {
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if (CollUtil.isEmpty(collection)) {
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return CollUtil.newArrayList();
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}
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// 注意此处不要使用 .toList() 新语法 因为返回的是不可变List 会导致序列化问题
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return collection.stream().filter(function).collect(Collectors.toList());
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}
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@@ -55,7 +55,7 @@ public class StreamUtils {
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*/
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public static <E> String join(Collection<E> collection, Function<E, String> function, CharSequence delimiter) {
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if (CollUtil.isEmpty(collection)) {
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return StrUtil.EMPTY;
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return StringUtils.EMPTY;
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}
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return collection.stream().map(function).filter(Objects::nonNull).collect(Collectors.joining(delimiter));
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}
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@@ -71,7 +71,8 @@ public class StreamUtils {
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if (CollUtil.isEmpty(collection)) {
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return CollUtil.newArrayList();
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}
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return collection.stream().sorted(comparing).collect(Collectors.toList());
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// 注意此处不要使用 .toList() 新语法 因为返回的是不可变List 会导致序列化问题
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return collection.stream().filter(Objects::nonNull).sorted(comparing).collect(Collectors.toList());
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}
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/**
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@@ -88,7 +89,7 @@ public class StreamUtils {
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if (CollUtil.isEmpty(collection)) {
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return MapUtil.newHashMap();
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}
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return collection.stream().collect(Collectors.toMap(key, Function.identity(), (l, r) -> l));
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return collection.stream().filter(Objects::nonNull).collect(Collectors.toMap(key, Function.identity(), (l, r) -> l));
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}
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/**
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@@ -107,7 +108,7 @@ public class StreamUtils {
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if (CollUtil.isEmpty(collection)) {
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return MapUtil.newHashMap();
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}
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return collection.stream().collect(Collectors.toMap(key, value, (l, r) -> l));
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return collection.stream().filter(Objects::nonNull).collect(Collectors.toMap(key, value, (l, r) -> l));
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}
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/**
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@@ -125,7 +126,7 @@ public class StreamUtils {
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return MapUtil.newHashMap();
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}
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return collection
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.stream()
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.stream().filter(Objects::nonNull)
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.collect(Collectors.groupingBy(key, LinkedHashMap::new, Collectors.toList()));
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}
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@@ -146,7 +147,7 @@ public class StreamUtils {
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return MapUtil.newHashMap();
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}
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return collection
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.stream()
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.stream().filter(Objects::nonNull)
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.collect(Collectors.groupingBy(key1, LinkedHashMap::new, Collectors.groupingBy(key2, LinkedHashMap::new, Collectors.toList())));
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}
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@@ -167,7 +168,7 @@ public class StreamUtils {
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return MapUtil.newHashMap();
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}
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return collection
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.stream()
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.stream().filter(Objects::nonNull)
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.collect(Collectors.groupingBy(key1, LinkedHashMap::new, Collectors.toMap(key2, Function.identity(), (l, r) -> l)));
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}
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@@ -189,6 +190,7 @@ public class StreamUtils {
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.stream()
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.map(function)
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.filter(Objects::nonNull)
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// 注意此处不要使用 .toList() 新语法 因为返回的是不可变List 会导致序列化问题
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.collect(Collectors.toList());
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}
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