Spring中Bean的作用域与StepScope关系、疑问

栏目: Java · 发布时间: 7年前

内容简介:Spring中Bean的作用域与StepScope关系、疑问

Spring Bean有5个作用域,但是最近有需求在多个地方获取同一个Bean,只修改其中一个参数。那么Bean只在一个地方注入,修改属性就好,名字能一样吗?一系列问题

这个StepScope是什么鬼,5个默认的Scope能满足需求吗?

Bean scopes

Scope Description
singleton Scopes a single bean definition to a single object instance per Spring IoC container.
prototype Scopes a single bean definition to any number of object instances.
request Scopes a single bean definition to the lifecycle of a single HTTP request; that is each and every HTTP request will have its own instance of a bean created off the back of a single bean definition. Only valid in the context of a web-aware Spring ApplicationContext.
session Scopes a single bean definition to the lifecycle of a HTTP Session. Only valid in the context of a web-aware Spring ApplicationContext.
global session Scopes a single bean definition to the lifecycle of a global HTTP Session. Typically only valid when used in a portlet context. Only valid in the context of a web-aware Spring ApplicationContext.

通常我们使用的是singleton,默认也是。在测试中发现提供相同类型的Bean,需要指定不同的name标识(@Bean("three")),使用时对应@Qualifier("three")。


以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持 码农网

查看所有标签

猜你喜欢:

本站部分资源来源于网络,本站转载出于传递更多信息之目的,版权归原作者或者来源机构所有,如转载稿涉及版权问题,请联系我们

Understanding Machine Learning

Understanding Machine Learning

Shai Shalev-Shwartz、Shai Ben-David / Cambridge University Press / 2014 / USD 48.51

Machine learning is one of the fastest growing areas of computer science, with far-reaching applications. The aim of this textbook is to introduce machine learning, and the algorithmic paradigms it of......一起来看看 《Understanding Machine Learning》 这本书的介绍吧!

XML 在线格式化
XML 在线格式化

在线 XML 格式化压缩工具

正则表达式在线测试
正则表达式在线测试

正则表达式在线测试

HEX CMYK 转换工具
HEX CMYK 转换工具

HEX CMYK 互转工具