Spring之注释理解

注释分类：

• @Required
• @Autowired
• @Qualifer

一. @Required

public class Student {
    private Integer age;
    private String name;
    @Required
    public void setAge(Integer age) {
        this.age = age;
    }
    public Integer getAge() {
        return age;
    }

    @Required
    public void setName(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }

<!-- Definition for student bean -->
    <bean id="student" class="com.zhw.test.Student">
        <property name="name" value="Zara" />
        <property name="age" value="25" />
        
        <!-- try without passing age and check the result :result表明：在student中使用过@required注释过的属性必须包含在bean的property属性中-->

result表明：在student中使用过@required注释过的属性必须包含在bean的property属性中,否则报错