两个集合之间数据传递(PO,VO数据交互)

 

public class Student {
    private int id;
    private String name;
    private String sex;

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

 

public class RSStudent {
    private String name;
    private String sex;

    public RSStudent() {
    
    }
    
    public RSStudent(Student stu) {     //构造赋值
        this.setName(stu.getName());
        this.setSex(stu.getSex());
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }
}

 

public static void fun() {
        // 创建多个对象放进stuList集合中
        List<Student> stuList = new ArrayList<Student>();
        for (int i = 0; i < 4; i++) {
            Student stu = new Student();
            stu.setId(1 + i);
            stu.setName("张三" + i);
            stu.setSex(i%2==0?"男":"女");
            stuList.add(stu);
        }

        // 把stuList集合中的对象放到rsList集合中(每次遍历都会把创建rs对象,并给其成员赋值，然后把赋完值之后rs对象添加到rsList集合中)
        List<RSStudent> rsList = new ArrayList<RSStudent>();
        for (Student student : stuList) { // 遍历stuList集合中的student对象
            RSStudent rsObj = new RSStudent(student);// 创建对象，把遍历出来的每个student对象传递到构造方法中
            rsList.add(rsObj);
        }
        
        //遍历rsList集合
        
        for (RSStudent rsStudent : rsList) {
            System.out.println(rsStudent.getName()+"---"+rsStudent.getSex());
            
        }

    }