wiring

Spring Autowiring @Qualifier example

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In Spring, @Qualifier means, which bean is qualify to autowired on a field. See following scenario : Autowiring Example See below example, it will autowired a “person” bean into customer’s person property. package com.mkyong.common; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; public class Customer { @Autowired private Person person; //… } But, two similar beans “com.mkyong.common.Person” are declared …

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Spring Autowiring by AutoDetect

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In Spring, “Autowiring by AutoDetect“, means chooses “autowire by constructor” if default constructor (argument with any data type), otherwise uses “autowire by type“. See an example of Spring “auto wiring by autodetect”. Auto wiring the “kungfu” bean into “panda”, via constructor or type (base on the implementation of panda bean). <bean id="panda" class="com.mkyong.common.Panda" autowire="autodetect" /> …

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Spring Autowiring by Constructor

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In Spring, “Autowiring by Constructor” is actually autowiring by Type in constructor argument. It means, if data type of a bean is same as the data type of other bean constructor argument, auto wire it. See a full example of Spring auto wiring by constructor. 1. Beans Two beans, developer and language. package com.mkyong.common; public …

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Spring Autowiring by Type

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In Spring, “Autowiring by Type” means, if data type of a bean is compatible with the data type of other bean property, auto wire it. For example, a “person” bean exposes a property with data type of “ability” class, Spring will find the bean with same data type of class “ability” and wire it automatically. …

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Spring Autowiring by Name

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In Spring, “Autowiring by Name” means, if the name of a bean is same as the name of other bean property, auto wire it. For example, if a “customer” bean exposes an “address” property, Spring will find the “address” bean in current container and wire it automatically. And if no matching found, just do nothing. …

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Spring Auto-Wiring Beans with @Autowired annotation

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In last Spring auto-wiring in XML example, it will autowired the matched property of any bean in current Spring container. In most cases, you may need autowired property in a particular bean only. In Spring, you can use @Autowired annotation to auto wire bean on the setter method, constructor or a field. Moreover, it can …

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Spring Auto-Wiring Beans

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In Spring framework, you can wire beans automatically with auto-wiring feature. To enable it, just define the “autowire” attribute in <bean>. <bean id="customer" class="com.mkyong.common.Customer" autowire="byName" /> In Spring, 5 Auto-wiring modes are supported. no – Default, no auto wiring, set it manually via “ref” attribute byName – Auto wiring by property name. If the name …

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