使用lambda表达式处理集合，返回字典结果

1. 实体类：

@Data
public class Student {private String id;private String name;private BigDecimal scor;public Student(String id, String name, BigDecimal scor) {this.id = id;this.name = name;this.scor = scor;}}

2. 定义字段类：

@Data
public class Dict {private String key;private String value;
}

3. 测试Demo

public class DictMapDemo {public static void main(String[] args) {Student zhang = new Student("1", "zhang", new BigDecimal(10));Student li = new Student("2", "li", new BigDecimal(20));Student wang = new Student("3", "wang", null);List students = Arrays.asList(zhang, li, wang);List collect = students.stream().map(x -> {Dict dict = new Dict();dict.setKey(x.getId());dict.setValue(x.getName());return dict;}).collect(Collectors.toList());System.out.println(collect); // [Dict(key=1, value=zhang), Dict(key=2, value=li), Dict(key=3, value=wang)]}
}

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