{"id":20227,"date":"2018-07-05T04:10:06","date_gmt":"2018-07-05T04:10:06","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=20227"},"modified":"2018-09-15T12:27:21","modified_gmt":"2018-09-15T06:57:21","slug":"spring-beans-autowiring","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/spring-beans-autowiring\/","title":{"rendered":"Spring Beans Autowiring &#8211; Modes with Eclipse IDE Example"},"content":{"rendered":"<div class='__iawmlf-post-loop-links' style='display:none;' data-iawmlf-post-links='[{&quot;id&quot;:1901,&quot;href&quot;:&quot;https:\\\/\\\/en.wikipedia.org\\\/wiki\\\/Spring_Framework&quot;,&quot;archived_href&quot;:&quot;http:\\\/\\\/web-wp.archive.org\\\/web\\\/20251003105514\\\/https:\\\/\\\/en.wikipedia.org\\\/wiki\\\/Spring_Framework&quot;,&quot;redirect_href&quot;:&quot;&quot;,&quot;checks&quot;:[{&quot;date&quot;:&quot;2025-12-10 07:30:46&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2025-12-15 12:34:55&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2025-12-19 00:53:54&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2025-12-22 07:31:03&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2025-12-28 18:03:16&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-01-02 18:56:25&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-01-05 21:42:16&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-01-11 11:07:56&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-01-18 16:10:39&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-01-24 11:15:10&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-02 10:03:18&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-06 11:15:36&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-11 05:03:27&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-16 13:02:34&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-21 05:52:52&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-02-25 03:33:37&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-03-03 07:27:11&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-03-15 08:39:30&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-03-18 09:30:46&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-04-01 17:30:57&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-04-11 21:45:34&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-04-16 07:00:58&quot;,&quot;http_code&quot;:503},{&quot;date&quot;:&quot;2026-04-21 06:40:46&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-04-24 15:27:59&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-04-27 16:08:07&quot;,&quot;http_code&quot;:429},{&quot;date&quot;:&quot;2026-04-30 17:25:41&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-05-06 03:04:02&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-05-14 20:58:34&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-05-18 03:05:48&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-05-21 18:04:49&quot;,&quot;http_code&quot;:429},{&quot;date&quot;:&quot;2026-05-25 06:08:23&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-06-02 05:46:48&quot;,&quot;http_code&quot;:200},{&quot;date&quot;:&quot;2026-06-10 06:21:50&quot;,&quot;http_code&quot;:200}],&quot;broken&quot;:false,&quot;last_checked&quot;:{&quot;date&quot;:&quot;2026-06-10 06:21:50&quot;,&quot;http_code&quot;:200},&quot;process&quot;:&quot;done&quot;}]'><\/div>\n<h2>1. Objective<\/h2>\n<p>In our previous tutorial, we studied <a href=\"https:\/\/data-flair.training\/blogs\/spring-batch\/\"><strong>Spring Batch<\/strong><\/a> and in this Spring Beans Tutorial, we will learn about Spring Beans Autowiring. Along with that, you will learn about the modes of Autowiring in <strong><a href=\"https:\/\/data-flair.training\/blogs\/spring-framework-tutorial\/\">Spring Framework<\/a><\/strong>, is used to instruct the Spring container to use autowiring for DI. There will also be working an example using Eclipse IDE.<br \/>\nSo, let&#8217;s start Spring Beans Autowiring.<\/p>\n<div id=\"attachment_20234\" style=\"width: 1210px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/Spring-Beans-Auto-Wiring-01-1.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-20234\" class=\"wp-image-20234 size-full\" src=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/Spring-Beans-Auto-Wiring-01-1.jpg\" alt=\"Spring Beans Autowiring - Modes with Eclipse IDE Example\" width=\"1200\" height=\"628\" srcset=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/Spring-Beans-Auto-Wiring-01-1.jpg 1200w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/Spring-Beans-Auto-Wiring-01-1-150x79.jpg 150w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/Spring-Beans-Auto-Wiring-01-1-300x157.jpg 300w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/Spring-Beans-Auto-Wiring-01-1-768x402.jpg 768w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/Spring-Beans-Auto-Wiring-01-1-1024x536.jpg 1024w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/a><p id=\"caption-attachment-20234\" class=\"wp-caption-text\">Spring Beans Autowiring &#8211; Modes with Eclipse IDE Example<\/p><\/div>\n<h2>2. What is Spring Beans Autowiring?<\/h2>\n<p>There are several collaborating beans used for developing the Spring application. Spring Beans Autowiring helps in making the relationship between them. In the previous sessions, you have understood the concept of using the &lt;bean&gt; to declare beans. Also, injecting &lt;bean&gt; using the elements like &lt;constructor-arg&gt; and &lt;property&gt; which helps in cutting down the amount of XML configuration. Autowiring in Spring Beans helps in reducing the efforts of writing properties.<br \/>\n<a href=\"https:\/\/data-flair.training\/blogs\/spring-bean\/\"><strong>Let&#8217;s know brief about Spring Beans\u00a0<\/strong><\/a><br \/>\nAll the Spring Beans autowiring should be specified at autowire attribute inside element\u00a0 &lt;bean&gt;, &lt;\/bean&gt;.<\/p>\n<h2>3. Spring Autowiring Modes<\/h2>\n<p>Before you start let\u2019s define a working example using Eclipse IDE with the following steps:<\/p>\n<ul>\n<li>Make a project named SpringEx under package com.example. It should be under src folder in the created project name.<\/li>\n<li>Put the required Spring libraries using External JARs option.<\/li>\n<li>Define classes TextEditor.java, SpellChecker.java, MainApp.java under the defined package.<\/li>\n<li>Define Bean config files Bean.xml.<\/li>\n<li>Use the <a href=\"https:\/\/data-flair.training\/blogs\/java-file-class\/\"><strong>Java files<\/strong><\/a> and bean configuration to run the application as defined below.<\/li>\n<\/ul>\n<p><strong>The code for java file TextEditor:<\/strong><br \/>\npackage com.example;<\/p>\n<pre class=\"EnlighterJSRAW\">public class TextEditor {\r\n\u00a0\u00a0 private SpellChecker spellChecker;\r\n\u00a0\u00a0 private String name;\r\n\u00a0\u00a0 public void setSpellChecker( SpellChecker spellChecker ){\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 this.spellChecker = spellChecker;\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public SpellChecker getSpellChecker() {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 return spellChecker;\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public void setName(String name) {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 this.name = name;\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public String getName() {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 return name;\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public void spellCheck() {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 spellChecker.checkSpelling();\r\n\u00a0\u00a0 }\r\n}<\/pre>\n<p><strong>The SpellChecker.java is as follow:<\/strong><br \/>\npackage com.example;<\/p>\n<pre class=\"EnlighterJSRAW\">public class SpellChecker {\r\n\u00a0\u00a0 public SpellChecker() {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(\"Inside SpellChecker constructor.\" );\r\n\u00a0\u00a0 }\r\n\u00a0\u00a0 public void checkSpelling() {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(\"Inside checkSpelling.\" );\r\n\u00a0\u00a0 }\r\n}<\/pre>\n<p><strong><a href=\"https:\/\/data-flair.training\/blogs\/spring-logging\/\">Read about Integration of Spring Logging with log4j \u2013 Eclipse IDE Coding<\/a><\/strong><br \/>\n<strong>The code for MainApp java file:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\">import org.springframework.context.ApplicationContext;\r\nimport org.springframework.context.support.ClassPathXmlApplicationContext;\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\");\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 TextEditor te = (TextEditor) context.getBean(\"tetEditor\");\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 te.spellCheck();\r\n\u00a0\u00a0 }\r\n}<\/pre>\n<p>After creating those file run them. You will get the following message as output:<br \/>\n<strong>Inside SpellChecker constructor.<\/strong><br \/>\n<strong>Inside checkSpelling.<\/strong><br \/>\nThere are several Spring Beans Autowiring modes available used for instructing the Spring container to use autowiring for DI. The autowiring at bean level is controlled using the autowire attribute having possible values:<\/p>\n<div id=\"attachment_20235\" style=\"width: 774px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/5930068495205484135.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-20235\" class=\"wp-image-20235 size-full\" src=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/5930068495205484135.png\" alt=\"Spring Beans Autowiring Modes\" width=\"764\" height=\"394\" srcset=\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/5930068495205484135.png 764w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/5930068495205484135-150x77.png 150w, https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/07\/5930068495205484135-300x155.png 300w\" sizes=\"auto, (max-width: 764px) 100vw, 764px\" \/><\/a><p id=\"caption-attachment-20235\" class=\"wp-caption-text\">Spring Beans Autowiring Modes<\/p><\/div>\n<h3>i. no<\/h3>\n<p>This is the default setting that is there is no autowiring in Spring Beans. Explicit bean reference is needed for wiring. The below is an example of autowiring \u2018no\u2019:<\/p>\n<pre class=\"EnlighterJSRAW\">&lt;bean class=\"com.example.sdnext.autowiring\"&gt;\r\n\u00a0\u00a0 &lt;property name=\"center\"&gt;\r\n&lt;\/property&gt;&lt;\/bean&gt;\r\n&lt;bean class=\"com.example.sdnext.autowiring\"&gt;&lt;\/bean&gt;<\/pre>\n<p><strong><a href=\"https:\/\/data-flair.training\/blogs\/spring-custom-event\/\">Do you How to Design Customised Events in Spring framework<\/a><\/strong><\/p>\n<h3>ii. byName<\/h3>\n<p>This autowiring mode is specified byName in the XML config file. It tries to match and wires the properties with beans which are defined by same names in a configuration file. Then if the match is found it will inject those beans else it won\u2019t be wired.<br \/>\nThe Beans.xml file with autowiring is as defined:<\/p>\n<pre class=\"EnlighterJSRAW\">&lt;?xml version = \"1.0\" encoding = \"UTF-8\"?&gt;\r\n&lt;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\"&gt;\r\n\u00a0\u00a0 &lt;!-- Definition for textEditor bean --&gt;\r\n\u00a0\u00a0 &lt;bean id = \"textEditor\" class = \"com.example.TextEditor\" autowire = \"byName\"&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;property name = \"name\" value = \"Generic Text Editor\" \/&gt;\r\n\u00a0\u00a0 &lt;\/bean&gt;\r\n\u00a0\u00a0 &lt;!-- Definition for spellChecker bean --&gt;\r\n\u00a0\u00a0 &lt;bean id = \"spellChecker\" class = \"com.example.SpellChecker\"&gt;&lt;\/bean&gt;\r\n&lt;\/beans&gt;<\/pre>\n<h3>iii. ByType<\/h3>\n<p>This autowiring mode is specified byType in the XML config file. It tries to match and wires the properties with beans which are defined by same names in a configuration file. Then if the match is found it will inject those beans else it won\u2019t be wired.<br \/>\nThe same example can be taken just replacing the Beans.xml file which is defined as below:<\/p>\n<pre class=\"EnlighterJSRAW\">&lt;?xml version = \"1.0\" encoding = \"UTF-8\"?&gt;\r\n&lt;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\"&gt;\r\n\u00a0\u00a0 &lt;!-- Definition for textEditor bean --&gt;\r\n\u00a0\u00a0 &lt;bean id = \"textEditor\" class = \"com.example.TextEditor\" autowire = \"byType\"&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;property name = \"name\" value = \"Generic Text Editor\" \/&gt;\r\n\u00a0\u00a0 &lt;\/bean&gt;\r\n\u00a0\u00a0 &lt;!-- Definition for spellChecker bean --&gt;\r\n\u00a0\u00a0 &lt;bean id = \"SpellChecker\" class = \"com.example.SpellChecker\"&gt;&lt;\/bean&gt;\r\n&lt;\/beans&gt;<\/pre>\n<h3>iv. constructor<\/h3>\n<p>This is similar to byType but it applies to the arguments of the constructor. The container of Spring sees the beans with an autowire attribute is set as a constructor in XML config file. Then it tries to match and wires with exactly one of the beans in the config file. If that match is found then it will inject those beans else it won\u2019t get wired.<\/p>\n<pre class=\"EnlighterJSRAW\">&lt;?xml version = \"1.0\" encoding = \"UTF-8\"?&gt;\r\n&lt;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\"&gt;\r\n\u00a0\u00a0 &lt;!-- Definition for textEditor bean --&gt;\r\n\u00a0\u00a0 &lt;bean id = \"textEditor\" class = \"com.example.TextEditor\"\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 autowire = \"constructor\"&gt;\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 &lt;constructor-arg value = \"Generic Text Editor\"\/&gt;\r\n\u00a0\u00a0 &lt;\/bean&gt;\r\n\u00a0\u00a0 &lt;!-- Definition for spellChecker bean --&gt;\r\n\u00a0\u00a0 &lt;bean id = \"SpellChecker\" class = \"com.example.SpellChecker\"&gt;&lt;\/bean&gt;\r\n&lt;\/beans&gt;<\/pre>\n<p><strong><a href=\"https:\/\/data-flair.training\/blogs\/spring-mvc-framework\/\">Let&#8217;s Explore Spring MVC Framework &#8211; Integration of MVC with Spring<\/a><\/strong><\/p>\n<h3>v. autodetect<\/h3>\n<p>If in a case where a default constructor is found Spring uses \u2018constructor\u2019. Else it tries to use the \u201cbyType\u201d.<\/p>\n<pre class=\"EnlighterJSRAW\">&lt;bean autowire=\"autodetect\" class=\"com.example.sdnext.autowiring\"&gt;&lt;\/bean&gt;\r\n&lt;bean class=\"com.example.sdnext.autowiring\"&gt;&lt;\/bean&gt;<\/pre>\n<p>So, this was all about Spring Beans Autowiring. Hope you like our explanation.<\/p>\n<h2>4. Conclusion<\/h2>\n<p>Hence, in this session, we learned about the autowiring in Spring Framework and how it is used in a Spring application. We also learned about the various auto wiring modes available along with the working example using Eclipse IDE. Furthermore, if you have any query, feel free to ask in the comment section.<br \/>\nRelated Topic &#8211; <strong><a href=\"https:\/\/data-flair.training\/blogs\/spring-bean-life-cycle\/\">Spring Bean Life cycle<\/a><\/strong><br \/>\n<strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/Spring_Framework\">For reference<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. Objective In our previous tutorial, we studied Spring Batch and in this Spring Beans Tutorial, we will learn about Spring Beans Autowiring. Along with that, you will learn about the modes of Autowiring&#46;&#46;&#46;<\/p>\n","protected":false},"author":5,"featured_media":20234,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[64],"tags":[1249,1257,1271,1272,1274,2254,2259,2926,3702,9089,13235,13266,13267,13268],"class_list":["post-20227","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-spring","tag-auto-wiring-in-spring-framework","tag-autodetect","tag-autowiring-in-spring-beans","tag-autowiring-in-spring-example-byname","tag-autowiring-modes-in-spring-beans","tag-byname","tag-bytype","tag-constructor","tag-default-autowiring-in-spring","tag-no","tag-spring-autowire-qualifier","tag-spring-beans-auto-wiring","tag-spring-beans-auto-wiring-modes","tag-spring-beans-autowiring"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Spring Beans Autowiring - 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