注入是将依赖注入对象的过程.方法注入用于将值对象设置为对象的依赖项.请参阅下面的示例.
示例
创建名为GuiceTester的java类.
import com.google.inject.AbstractModule;import com.google.inject.Guice;import com.google.inject.ImplementedBy;import com.google.inject.Inject;import com.google.inject.Injector;import com.google.inject.name.Named;import com.google.inject.name.Names;public class GuiceTester { public static void main(String[] args) { Injector injector = Guice.createInjector(new TextEditorModule()); TextEditor editor = injector.getInstance(TextEditor.class); editor.makeSpellCheck(); } }class TextEditor { private SpellChecker spellChecker; @Inject public TextEditor( SpellChecker spellChecker) { this.spellChecker = spellChecker; } public void makeSpellCheck() { spellChecker.checkSpelling(); } }//Binding Moduleclass TextEditorModule extends AbstractModule { @Override protected void configure() { bind(String.class) .annotatedWith(Names.named("JDBC")) .toInstance("jdbc:mysql://localhost:5326/emp"); } }@ImplementedBy(SpellCheckerImpl.class)interface SpellChecker { public void checkSpelling();}//spell checker implementationclass SpellCheckerImpl implements SpellChecker { private String dbUrl; public SpellCheckerImpl(){} @Inject public void setDbUrl(@Named("JDBC") String dbUrl) { this.dbUrl = dbUrl; } @Override public void checkSpelling() { System.out.println("Inside checkSpelling." ); System.out.println(dbUrl); }}
输出
编译并运行文件,你会看到以下输出.
Inside checkSpelling.jdbc:mysql://localhost:5326/emp