我正在尝试从列表对象中收集2个数据字段。
我正在使用Employee对象:
public class Employee
{
private long id;
private Source source;
private String name;
private String gender;
// getters
private Builder toBuilder(Builder builder)
{
builder.id = this.summaryDataId;
builder.name = this.name;
builder.gender = this.gender;
builder.source = this.source;
return builder;
}
将员工数据放入服务类别的列表中
final List<Employee> employeeData = employeeDao.retrieveEmployeeData(emp.getID());
,然后尝试创建带有employeeId和sourceid的列表(例如:1234:3)。为此,我正在尝试使用collectors.toList
List<String> employeeCollector = employeeData.stream()
.filter(s -> s.getId != null)
.filter(s -> s.getSource() != null && s.getSource().getId() != null)
.collect(Collectors.toList());
我如何使用collectors.toLis()获取employeeid:souceid格式>
我正在尝试从列表对象中收集2个数据字段。我正在使用Employee对象:public class Employee {private long id;私人来源;私有字符串名称;私有字符串...
您只需要执行中间操作map
来提取员工ID和源ID,>
List<String> employeeCollector = employeeData.stream()
.filter(s -> s.getId != null)
.filter(s -> s.getSource() != null && s.getSource().getId() != null)
.map(s-> String.format("%s:%s",s.getId(),s.getSource().getId()))
.collect(Collectors.toList());