不能自动关联所谓的简单属性,如原语、字符串和类

我是春天的新手,希望学习细节。我在读关于自动布线的书 You cannot autowire so-called simple properties such as primitives, Strings, and Classes (and arrays of such simple properties) here .

1) 我不明白这是什么意思 Classes 在这里

2) 他们说你不能自动连线原始人但我试过了 Integer 包装器类,它们仍然不工作,为什么?请参见下面的代码。

豆:

<bean id="teacher" class="com.climesoft.webapp.model.Teacher"
        autowire="byName">
</bean>
<bean id="id" class="java.lang.Integer">
            <constructor-arg value="20" />
</bean>

Java类:

public class Teacher {

    private String name;
//  private int id;
    private Integer id; // for autowiring
    private String phone;
    private Course course;


    public Course getCourse() {
        return course;
    }

    public void setCourse(Course course) {
        this.course = course;
    }

    public Teacher() {
        System.out.println("Calling Teacher No Param Constructor");
    }

    public Teacher(String name, Integer id, String phone) {
        this.name = name;
        this.id = id;
        this.phone = phone;

        System.out.println("Calling Teacher Param Constructor");
    }

    public String getName() {
        System.out.println("Calling Teacher getName");
        return name;
    }
    public void setName(String name) {
        System.out.println("Calling Teacher setName");
        this.name = name;
    }
    public Integer getId() {
        System.out.println("Calling Teacher getId");
        return id;
    }
    public void setId(Integer id) {
        System.out.println("Calling Teacher setId");
        this.id = id;
    }
    public String getPhone() {
        System.out.println("Calling Teacher getPhone");
        return phone;
    }
    public void setPhone(String phone) {
        System.out.println("Calling Teacher setPhone");
        this.phone = phone;
    }

    @Override
    public String toString() {
        return "Teacher [name=" + name + ", id=" + id + ", phone=" + phone + ", course=" + course + "]";
    }


}