java - 没有工厂的 Spring Bean 怎么能有工厂的方法呢？

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经过调查代码，我发现:

 <bean id="TestBean" class="com.test.checkDate"
 factory-method="getPreviousDate">
 <constructor-arg value .............

 ...............................

怎么可能呢？
谢谢。

最佳答案

来自文档

<bean id="exampleBean" class="examples.ExampleBean"
      factory-method="createInstance">
  <constructor-arg ref="anotherExampleBean"/>
  <constructor-arg ref="yetAnotherBean"/>
  <constructor-arg value="1"/>
</bean>

<bean id="anotherExampleBean" class="examples.AnotherBean"/>
<bean id="yetAnotherBean" class="examples.YetAnotherBean"/>

public class ExampleBean {

    // a private constructor
    private ExampleBean(...) {
      ...
    }

    // a static factory method; the arguments to this method can be
    // considered the dependencies of the bean that is returned,
    // regardless of how those arguments are actually used.
    public static ExampleBean createInstance (
            AnotherBean anotherBean, YetAnotherBean yetAnotherBean, int i) {

        ExampleBean eb = new ExampleBean (...);
        // some other operations...
            return eb;
    }
}

关于java - 没有工厂的 Spring Bean 怎么能有工厂的方法呢？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/7952548/