Maven can'；t使用流操作链编译java

正如标题所说，当我试图编译一段包含一系列流操作的代码时，我遇到了一个问题

这在IDE中不会发生（使用eclipse和IntelliJ进行了尝试），但当我在控制台中尝试“mvn clean install”时，它会抛出以下错误：

[ERROR] .collect(Collectors.joining("&"));
[ERROR] ^^^^^^^

[ERROR] The method collect(Collector<? super Object,A,R>) in the type Stream<Object> is not applicable for the arguments (Collector<CharSequence,capture#1-of ?,String>)
[ERROR] 
[ERROR] Found 1 error and 0 warnings.
[ERROR] -> [Help 1]

[ERROR].collect（收集器.加入（&））；
[错误]^^^^^^^
[错误]方法collect（Collector在调用mvn之前尝试导出JAVA\u HOME。看来，您的默认设置是java7。
我无法用JDK 1.8.0\u 74（使用Maven 3.3.9）重现它。第一个代码段编译得很好。在我们真正帮助解决maven问题之前，您需要发布pom中的构建插件设置。@Tunaki有一个好主意，在
javac
补丁中解决了许多流问题。Eclipse将使用与maven不同的编译器。请尝试最新版本的Java，这在我遇到类似问题。也无法使用JDK 1.8.051重新编程。是否可以发布
pom.xml
？您可以运行
mvn帮助：effective pom
来展开所有变量、托管插件和依赖项以及配置文件，以查看最终的设置。检查输出中的编译器插件设置，验证您是否使用了编译器你以为你是。
package com.stackoverflow.test;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

public class StreamMavenTest {


    public static void main(String[] args) {
        List<Department> depts = initDepts();
        String unpaidReferences = depts.stream()
                .flatMap(dpto -> dpto.people.stream()
                        .filter(ppl -> ppl.lastname != null && ppl.name != null)
                        .map(ppl -> ppl.name + "|" + ppl.lastname))
                .collect(Collectors.joining("&"));
        System.out.println(unpaidReferences);
    }

    private static List<Department> initDepts() {
        List<Department> depts = new ArrayList<Department>();
        Department dep1 = new Department();
        dep1.people = new ArrayList<Person>();
        dep1.people.add(new Person("Baudouin","Quy"));
        dep1.people.add(new Person("Sigmund","Zebedaios"));
        dep1.people.add(new Person("Bernd","Edwyn"));
        depts.add(dep1);
        Department dep2 = new Department();
        dep2.people = new ArrayList<Person>();
        dep2.people.add(new Person("Olanrewaju","Jorgen"));
        dep2.people.add(new Person("Stanislovas","Adalberto"));
        dep2.people.add(new Person("Manuel","'Avshalom"));
        depts.add(dep2);
        return depts;
    }

    public static class Department{
        List<Person> people;
    }


    public static class Person{
        String name;
        String lastname;

        public Person(String name, String lastname){
            this.name = name;
            this.lastname = lastname;
        }
    }

}

public static void main(String[] args) {
  List<Department> depts = initDepts();
  Stream<String> flatMap = depts.stream()
          .flatMap(dpto -> dpto.people.stream()
                  .filter(ppl -> ppl.lastname != null && ppl.name != null)
                  .map(ppl -> ppl.name + "|" + ppl.lastname));
  String unpaidReferences = flatMap
          .collect(Collectors.joining("&"));
  System.out.println(unpaidReferences);
}