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Commit4a500dc

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spring import annotation
1 parent4978f0c commit4a500dc

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7 files changed

+176
-0
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7 files changed

+176
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packagecommon;
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publicclassSpellChecker {
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publicSpellChecker() {
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System.out.println("Inside SpellChecker constructor.");
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}
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publicvoidcheckSpelling() {
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System.out.println("Inside checkSpelling.");
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}
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}
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packagecommon;
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importlombok.Getter;
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publicclassTextEditor {
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@Getter
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privateSpellCheckerspellChecker;
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// I have to comment this out when using inner bean method to inject
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// dependency
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publicTextEditor(SpellCheckerspellChecker) {
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System.out.println("Inside TextEditor constructor.");
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this.spellChecker =spellChecker;
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}
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publicvoidspellCheck() {
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spellChecker.checkSpelling();
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}
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// I have to comment out the setter method if I'm using constructor based
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// dependency injection
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// a setter method to inject the dependency.
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// public void setSpellChecker(SpellChecker spellChecker) {
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// System.out.println("Inside setSpellChecker.");
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// this.spellChecker = spellChecker;
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// }
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// a getter method to return spellChecker
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//public SpellChecker getSpellChecker() {
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//return spellChecker;
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//}
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publicvoidinit() {
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System.out.println("Inside init() method.");
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}
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publicvoidcleanup() {
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System.out.println("Inside cleanup() method.");
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}
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}
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packagespring_import_annotation;
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/** This is a class used for MainApp to demo @Import annotation. */
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publicclassApp1 {
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publicApp1() {
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setup();
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work();
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cleanup();
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}
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privatevoidcleanup() {
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System.out.println("This is App1: I'm cleaning myself up!");
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}
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privatevoidwork() {
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System.out.println("This is App1: I'm working now!");
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}
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privatevoidsetup() {
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System.out.println("This is App1: I'm setting myself up!");
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}
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publicvoiddoCooler() {
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System.out.println("This is App1: doing something cool!");
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}
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}
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packagespring_import_annotation;
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/** This is a class used for MainApp to demo @Import annotation.*/
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importorg.springframework.context.annotation.Bean;
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importorg.springframework.context.annotation.Configuration;
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@Configuration
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publicclassApp1Config {
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@Bean
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publicApp1app1() {
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returnnewApp1();
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}
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}
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packagespring_import_annotation;
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/** This is a class used for MainApp to demo @Import annotation. */
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publicclassApp2 {
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publicApp2() {
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setup();
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work();
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cleanup();
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}
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privatevoidcleanup() {
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System.out.println("This is App2: I'm cleaning myself up!");
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}
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privatevoidwork() {
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System.out.println("This is App2: I'm working now!");
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}
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privatevoidsetup() {
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System.out.println("This is App2: I'm setting myself up!");
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}
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publicvoiddoCool() {
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System.out.println("This is App2: doing something cool!");
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}
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}
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packagespring_import_annotation;
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/** This is a class used for MainApp to demo @Import annotation.*/
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importorg.springframework.context.annotation.Bean;
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importorg.springframework.context.annotation.Configuration;
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importorg.springframework.context.annotation.Import;
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importcommon.TextEditor;
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@Configuration
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@Import(App1Config.class)
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publicclassApp2Config {
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@Bean
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publicApp1app1() {
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returnnewApp1();
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}
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@Bean
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publicApp2app2() {
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returnnewApp2();
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}
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@Bean(initMethod ="init",destroyMethod ="cleanup")
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publicTextEditortextEditor() {
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returnnewTextEditor(null);
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}
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}
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packagespring_import_annotation;
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/** This is a class to demo @Import annotation.
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* Pay special attention to Config classes and normal classes, they are used
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* in different places, don't misuse them.
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*
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* This pkg of application didn't use beans.xml at all! Cool!
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* All annotation based configuration to use Spring!*/
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importorg.springframework.context.ApplicationContext;
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importorg.springframework.context.annotation.AnnotationConfigApplicationContext;
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importcommon.TextEditor;
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publicclassMainAppForDemoImportAnnotation {
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publicstaticvoidmain(String[]args) {
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ApplicationContextctx =newAnnotationConfigApplicationContext(App2Config.class);
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// now both beans A and B will be available...
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App1app1 =ctx.getBean(App1.class);
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App2app2 =ctx.getBean(App2.class);
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app2.doCool();
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app1.doCooler();
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common.TextEditorte =ctx.getBean(TextEditor.class);
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System.out.println("That's the end of the program.");
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}
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}

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