Spring 通过单利模式，单利方法获取对象--factory-method="getInstance"(二)

1

<bean id="a"
class="com.ioc.A" factory-method="getInstance">
<property name="b" ref="b" />
<property name="c" ref="c" />
</bean>

2
package com.ioc;

public class A {

B b;
C c;

public A() {
}
public A(String title)
{
System.out.println("i am single");
}

public B getB() {
return b;
}
public void setB(B b) {
this.b = b;
}
public C getC() {
return c;
}
public void setC(C c) {
this.c = c;
}
@Override
public String toString() {
return "A [b=" + b + ", c=" + c + "]";
}
public static A a = null;
public static A getInstance()
{
if(a == null)
{
a = new A("hello");
}
return a;
}
}