在Spring Framework中使用registerShutdownHook（） [英] using registerShutdownHook() in the Spring Framework

问题描述

我在线阅读本教程。
http://www.tutorialspoint.com/spring/spring_bean_life_cycle.htm

I am following this tutorial online to the letter. http://www.tutorialspoint.com/spring/spring_bean_life_cycle.htm

但是当我到达这一行时，我在使用Eclipse
时遇到错误：
context.registerShutdownHook（）;

But I get the errors when using Eclipse when I get to this line: context.registerShutdownHook();

Eclipse说：

此行的多个标记
- 语法错误，插入AssignmentOperator Expression以完成
赋值
- 语法错误，插入;以完成语句
- 方法registerShutdownHook（）未定义类型
ApplicationContext

"Multiple markers at this line - Syntax error, insert "AssignmentOperator Expression" to complete Assignment - Syntax error, insert ";" to complete Statement - The method registerShutdownHook() is undefined for the type ApplicationContext"

我正在完全遵循本教程。我的所有变量名都完全相同。我的代码与他的完全相同。我不确定是什么问题。

I am following this tutorial exactly. All of my variable names are exactly the same.My code is exactly the same as his. I am not sure what is wrong.

我做错了什么，可以做些什么来解决这个问题，以便我可以继续教程。

What am I doing wrong, what can be done to fix this so that I can continue the tutorial.

package com.tutorialspoint;

import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MainApp
{
    public static void main(String[] args)
    {
        AbstractApplicationContext context = new ClassPathXmlApplicationContext("Beans.xml");

        HelloWorld obj = (HelloWorld)context.getBean("helloWorld");
        obj.getMessage();
        context.registerShutdownHook();
    }
}

推荐答案

错误似乎上下文是 ApplicationContext ，而在教程中，它应该是 AbstractApplicationContext

For the error it seems that context is a object of ApplicationContext, whereas in tutorial it should be an object of AbstractApplicationContext

我只是在猜你写了这个

public class MainApp {
   public static void main(String[] args) {

      ApplicationContext context = 
                          new ClassPathXmlApplicationContext("Beans.xml");//error here

      HelloWorld obj = (HelloWorld) context.getBean("helloWorld");
      obj.getMessage();
      context.registerShutdownHook();
   }
}

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