如何使用Stream流操作将list中所有map的某个值拼接成字符串
list.stream().map(p->p.get("name")).collect(Collectors.joining(","));
package com.huifer.concurrence.issues;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;public class C {
public static void main(String[] args) {
List<Map<String, String>> list = new ArrayList<>();
Map<String, String> m = new HashMap();
m.put("name", "樟树街");
Map<String, String> m1 = new HashMap();
m1.put("name", "樟树街1");
Map<String, String> m2 = new HashMap();
m2.put("name", "樟树街1");
list.add(m);
list.add(m2);
list.add(m1);
String s= list.stream().map(p->p.get("name")).collect(Collectors.joining(","));
System.out.println(s);
}
}Output:
樟树街,樟树街1,樟树街2
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