\nSo, let’s start\u00a0Spring Bean Definition Inheritance.<\/p>\n
![\"Spring](\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/Spring-Bean-Definition-Inheritance-with-Eclipse-IDE-01.jpg\")
<\/a>Spring Bean Definition Inheritance with Bean Definition Template<\/p><\/div>\n
2. Bean Definition Inheritance<\/h2>\n
The child beans definition inherits configuration data from the definition of the parent. Along with that the child definition has the ability to override some of the values while adding others when needed. The Java class<\/strong> <\/a>inheritance has nothing to do with the Spring Bean definition<\/strong><\/a> but the concept of inheritance is applied. You have the power of defining the parent bean as a template and the other child beans can inherit the required configuration from the parent bean. Let\u2019s define a working example using Eclipse IDE in Bean Definition Inheritance having the following steps:<\/p>\n Read about Spring Transaction Management – Types and Methods<\/a><\/strong><\/p>\n Now after defining the Java files, you see the configuration file Beans.xml where HelloWorld beans which has properties message2 and message1. Next, the HelloIndia bean has to be defined as the child of HelloWorld by using parent attribute. Then the child beans inherit the message 2 property and override the message 1 property introducing another property message 3. You also have the possibility of creating the Bean Definition Template which is used by the other child bean definitions without giving much effort. So while you are defining the Bean Definition Template you shouldn\u2019t specify the class attribute but the abstract attribute. Also, you should specify the abstract attribute with the value \u201ctrue\u201d which is shown as below:<\/p>\n The parent Bean can\u2019t be instantiated by its own as it is incomplete and is marked as abstract. Therefore, when the definition is abstract then its advisable to use it as a pure template Bean Definition only. Hence, in this session, we learned Spring framework Beans Definition Inheritance. The more detailed analysis was done by showing a working example using Eclipse IDE. Also, without putting much effort you can create a Bean Definition Template which is used by the other child beans definition. Furthermore, if you have any query regarding\u00a0Bean\u00a0Definition Inheritance, feel free to ask in the comment section. 1. Objective This is the last article featuring the Spring Beans where you will be learning about the Spring Bean Definition Inheritance. You should know that a bean definition contains a lot of information...<\/p>\n","protected":false},"author":5,"featured_media":20370,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[64],"tags":[1683,1685,3732,6709,13208],"class_list":["post-20360","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-spring","tag-bean-definition-inheritance","tag-bean-definition-template","tag-definition-inheritance-in-spring-bean","tag-inheritance-in-spring-using-annotation","tag-spring-inherited"],"yoast_head":"\n
\nLet’s read about Java Inheritance in detail<\/strong><\/a><\/p>\n3. Bean Definition Inheritance Example using\u00a0Eclipse IDE<\/h2>\n
\n
i. The code for the HelloWorld.java<\/h3>\n
package com.example;\u00a0\r\npublic class HelloWorld {\r\n\u00a0\u00a0 private String message1;\r\n\u00a0\u00a0 private String message2;\r\n\u00a0\u00a0 public void setMessage1(String message){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 this.message1 = message;\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public void setMessage2(String message){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 this.message2 = message;\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public void getMessage1(){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(\"World Message1 : \" + message1);\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public void getMessage2(){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(\"World Message2 : \" + message2);\r\n\u00a0\u00a0 }\r\n}<\/pre>\nii. The following is the code for HelloIndia.java<\/h3>\n
package com.example;\r\npublic class HelloIndia {\r\n\u00a0\u00a0 private String message1;\r\n\u00a0\u00a0 private String message2;\r\n\u00a0\u00a0 private String message3;\r\n\u00a0\u00a0 public void setMessage1(String message){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 this.message1 = message;\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public void setMessage2(String message){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 this.message2 = message;\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public void setMessage3(String message){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 this.message3 = message;\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public void getMessage1(){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(\"India Message1 : \" + message1);\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public void getMessage2(){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(\"India Message2 : \" + message2);\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public void getMessage3(){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(\"India Message3 : \" + message3);\r\n\u00a0\u00a0 }\r\n}<\/pre>\niii. MainApp.java is defined as follows<\/h3>\n
package com.example;\r\nimport org.springframework.context.ApplicationContext;\r\nimport org.springframework.context.support.ClassPathXmlApplicationContext;\u00a0\r\npublic class MainApp {\r\n\u00a0\u00a0 public static void main(String[] args) {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 ApplicationContext context = new ClassPathXmlApplicationContext(\"Beans.xml\");\u00a0\u00a0\u00a0\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 HelloWorld objA = (HelloWorld) context.getBean(\"helloWorld\");\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 objA.getMessage1();\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 objA.getMessage2();\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 HelloIndia objB = (HelloIndia) context.getBean(\"helloIndia\");\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 objB.getMessage1();\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 objB.getMessage2();\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 objB.getMessage3();\r\n\u00a0\u00a0 }\r\n}<\/pre>\n
\nHave a look at Spring Beans Autowiring – Modes with Eclipse IDE Example<\/strong><\/a>
\nThe Beans.xml is as follow:<\/strong><\/p>\n<?xml version = \"1.0\" encoding = \"UTF-8\"?>\r\n<beans xmlns = \"http:\/\/www.springframework.org\/schema\/beans\"\r\n\u00a0\u00a0 xmlns:xsi = \"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"\r\n\u00a0\u00a0 xsi:schemaLocation = \"http:\/\/www.springframework.org\/schema\/beans\r\n\u00a0\u00a0 http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.0.xsd\">\r\n\u00a0\u00a0 <bean id = \"helloWorld\" class = \"com.example.HelloWorld\">\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <property name = \"message1\" value = \"Hello World!\"\/>\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <property name = \"message2\" value = \"Hello Second World!\"\/>\r\n\u00a0\u00a0 <\/bean>\r\n\u00a0\u00a0 <bean id =\" helloIndia\" class = \"com.example.HelloIndia\" parent = \"helloWorld\">\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <property name = \"message1\" value = \"Hello India!\"\/>\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <property name = \"message3\" value = \"Namaste India!\"\/>\r\n\u00a0\u00a0 <\/bean>\r\n<\/beans><\/pre>\n
4. The Bean Definition Template<\/h2>\n
<?xml version = \"1.0\" encoding = \"UTF-8\"?>\r\n<beans xmlns = \"http:\/\/www.springframework.org\/schema\/beans\"\r\n\u00a0\u00a0 xmlns:xsi = \"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"\r\n\u00a0\u00a0 xsi:schemaLocation = \"http:\/\/www.springframework.org\/schema\/beans\r\n\u00a0\u00a0 http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.0.xsd\">\r\n\u00a0 <bean id = \"beanTeamplate\" abstract = \"true\">\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <property name = \"message1\" value = \"Hello World!\"\/>\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <property name = \"message2\" value = \"Hello Second World!\"\/>\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <property name = \"message3\" value = \"Namaste India!\"\/>\r\n\u00a0\u00a0 <\/bean>\r\n\u00a0 <bean id = \"helloIndia\" class = \"com.example.HelloIndia\" parent = \"beanTeamplate\">\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <property name = \"message1\" value = \"Hello India!\"\/>\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <property name = \"message3\" value = \"Namaste India!\"\/>\r\n\u00a0\u00a0 <\/bean>\r\n<\/beans><\/pre>\n
\nSo, this was all about Spring Bean Definition Inheritance. Hope you like our explanation.<\/p>\n5. Conclusion<\/h2>\n
\nRelated Topic – Spring BeanPostProcessors <\/strong><\/a>
\nFor reference<\/a><\/strong><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"