Spring的copy属性

Spring 的 BeanUtils.copyProperties()实现的是浅拷贝

ClassA

public class ClassA {
    private Integer age;
    private String name;
    private ClassC c;

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getName() {
        return name;
    }

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

    public ClassC getC() {
        return c;
    }

    public void setC(ClassC c) {
        this.c = c;
    }

    @Override
    public String toString() {
        return "ClassA{" +
                "age=" + age +
                ", name='" + name + '\'' +
                ", c=" + c +
                '}';
    }
}
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ClassB

public class ClassB {
    private Integer age;
    private String name;
    private String other;
    private ClassC d;
    private ClassD c;

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getName() {
        return name;
    }

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

    public String getOther() {
        return other;
    }

    public void setOther(String other) {
        this.other = other;
    }

    public ClassD getC() {
        return c;
    }

    public void setC(ClassD c) {
        this.c = c;
    }


    public ClassC getD() {
        return d;
    }

    public void setD(ClassC d) {
        this.d = d;
    }

    @Override
    public String toString() {
        return "ClassB{" +
                "age=" + age +
                ", name='" + name + '\'' +
                ", other='" + other + '\'' +
                ", c=" + c +
                ", d=" + d +
                '}';
    }
}

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ClassC

public class ClassC {
    private String name;

    public String getName() {
        return name;
    }

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

    @Override
    public String toString() {
        return "ClassC{" +
                "name='" + name + '\'' +
                '}';
    }
}
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ClassD

public class ClassD {
    private String name;

    public String getName() {
        return name;
    }

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

    @Override
    public String toString() {
        return "ClassD{" +
                "name='" + name + '\'' +
                '}';
    }
}
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main

    public static void main(String[] args) {
        ClassA a=new ClassA();
        a.setAge(10);
        a.setName("A");
        ClassC c=new ClassC();
        c.setName("C");
        a.setC(c);

        ClassB b=new ClassB();
        b.setAge(111);
        b.setName("B");
        ClassC c1=new ClassC();
        c1.setName("C1");
        b.setD(c1);
        ClassD d=new ClassD();
        d.setName("D");
        b.setC(d);
        System.out.println("我是改变前的a"+a);
        System.out.println("我是改变前的b"+b);
        System.out.println("我是改变前的c"+c);
        BeanUtils.copyProperties(a,b);
        System.out.println("我是改变后的a"+a);
        System.out.println("我是改变后的b"+b);
        System.out.println("我是改变后的c"+c);

    }
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结果

b只复制和a属性类型相同的值