我们经常会遇到泛型转换泛型的时候，今天我们就介绍下使用java1.8和普通转换，其中测试数据自行添加

@Data
public class Study1{private  String no;      // 学号private  String name;	 // 姓名
}@Data
public class Study2{private  String no;      // 学号private  String name;	 // 姓名
}

一、List<Object> 转 List<String>

List<Study1> study1List = Lists.newArrayList();
List<String> stringList = study1List.stream().map(Study::getNo ).collect(Collectors.toList());

二、List<Object> 转 List<Object> 

List<Study1> study1List = Lists.newArrayList();
List<Study> studyList = study1List.stream().collect(Collectors.collectingAndThen(Collectors.toCollection(() -> new TreeSet<>(Comparator.comparing(obj -> obj.getNo()))), ArrayList::new));

三、List<Object1> 转 List<Object2>

List<Study1> study1List = Lists.newArrayList();
List<Study2> study2List = study1List.stream().map(study -> {Study2 study2= new Study2();study2.setNo(study.getNo());study2.setName(study.getName());return study2;}).collect(Collectors.toList());

四、List<Object1> 转 List<Object2>(普通转换)

// BeanUtils.copyProperties 前提属性，类型必须相同
List<Study1> study1List = Lists.newArrayList();
List<Study2> study2List = Lists.newArrayList();for(Study1 study: study1List ){Study2 study2 = new Study2();BeanUtils.copyProperties(study, study2);study2List.add(study2);
}