【java8stream工具】-创新互联
java8 stream 工具
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//
新闻名称:【java8stream工具】-创新互联
网页地址:http://scyanting.com/article/diocdd.html
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.commons.collections4.CollectionUtils;
public class StreamUtil {
private StreamUtil() {
throw new IllegalArgumentException(“Utility class”);
}
public static void consumerList(List list, Consumer consumer) {
if (!CollectionUtils.isEmpty(list)) {
list.stream().forEach(consumer);
}
}
public staticListmapList(Listlist, Functionfunction) {
return CollectionUtils.isEmpty(list) ? Collections.emptyList() : (List)list.stream().map(function).collect(Collectors.toList());
}
public staticListfilterList(Listlist, Predicatepredicate) {
return CollectionUtils.isEmpty(list) ? Collections.emptyList() : (List)list.stream().filter(predicate).collect(Collectors.toList());
}
public staticListmultiFilterList(Listlist, Predicate... predicates) {
if (CollectionUtils.isEmpty(list)) {
return Collections.emptyList();
} else {
Streamstream = list.stream();
Predicate[] var3 = predicates;
int var4 = predicates.length;
for(int var5 = 0; var5< var4; ++var5) {
Predicatepredicate = var3[var5];
stream = stream.filter(predicate);
}
return (List)stream.collect(Collectors.toList());
}
}
public staticMaplistToMap(Listlist, Functionfunction) {
return CollectionUtils.isEmpty(list) ? Collections.emptyMap() : (Map)list.stream().collect(Collectors.toMap(function, Function.identity()));
}
public staticListfilterAndMapList(Listlist, Predicatepredicate, Functionfunction) {
return CollectionUtils.isEmpty(list) ? Collections.emptyList() : (List)list.stream().filter(predicate).map(function).collect(Collectors.toList());
}
public staticMapfilter2Map(Setlist, Predicatepredicate, FunctionkeyFunction, FunctionvalueFunction) {
return CollectionUtils.isEmpty(list) ? Collections.emptyMap() : (Map)list.stream().filter(predicate).collect(Collectors.toMap(keyFunction, valueFunction));
}
public staticMapmapCollect2Map(Listlist, FunctionmapFunction, FunctionkeyFunction) {
return CollectionUtils.isEmpty(list) ? Collections.emptyMap() : (Map)list.stream().map(mapFunction).collect(Collectors.toMap(keyFunction, Function.identity()));
}
public staticMapcollect2Map(Listlist, FunctionkeyFunction, FunctionvalueFunction) {
return CollectionUtils.isEmpty(list) ? Collections.emptyMap() : (Map)list.stream().collect(Collectors.toMap(keyFunction, valueFunction));
}
public staticMap>list2GroupMap(Listlist, FunctionkeyFunction) {
return CollectionUtils.isEmpty(list) ? Collections.emptyMap() : (Map)list.stream().collect(Collectors.groupingBy(keyFunction));
}
public staticListlistDistinct(Listlist) {
return (List)list.stream().distinct().collect(Collectors.toList());
}
public staticListlist2MapAndDistinct(Listlist, Functionfunction) {
return (List)list.stream().map(function).distinct().collect(Collectors.toList());
}
}
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新闻名称:【java8stream工具】-创新互联
网页地址:http://scyanting.com/article/diocdd.html