使用AnnotationConfigApplicationContext可以实现基于Java的配置类加载Spring的应用上下文。避免使用application.xml进行配置。相比XML配置，更加便捷。
示例
AppConfig.java
package com.myapp.config; import com.myapp.Entitlement; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class AppConfig { @Bean(name="entitlement") public Entitlement entitlement() { Entitlement ent= new Entitlement(); ent.setName("Entitlement"); ent.setTime(1); return ent; } @Bean(name="entitlement2") public Entitlement entitlement2() { Entitlement ent= new Entitlement(); ent.setName("Entitlement2"); ent.setTime(2); return ent; } }
注：
@Configuration可理解为用spring的时候xml里面的<beans>标签
@Bean可理解为用spring的时候xml里面的<bean>标签
Entitlement.java
package com.myapp; public class Entitlement { private String name; private int time; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getTime() { return time; } public void setTime(int time) { this.time = time; } }
测试
JavaConfigTest.java
package com.myapp; import com.myapp.config.AppConfig; import org.springframework.context.annotation.AnnotationConfigApplicationContext; public class JavaConfigTest { public static void main(String[] arg) { AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(); ctx.register(AppConfig.class); ctx.refresh(); Entitlement ent = (Entitlement)ctx.getBean("entitlement"); System.out.println(ent.getName()); System.out.println(ent.getTime()); Entitlement ent2 = (Entitlement)ctx.getBean("entitlement2"); System.out.println(ent2.getName()); System.out.println(ent2.getTime()); ctx.close(); } }
结果
Entitlement 1 Entitlement2 2
使用AnnotationConfigApplicationContext可以实现基于Java的配置类加载Spring的应用上下文。避免使用application.xml进行配置。相比XML配置，更加便捷。示例
AppConfig.java
package com.myapp.config; import com.myapp.Entitlement; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class AppConfig { @Bean(name="entitlement") public Entitlement entitlement() { Entitlement ent= new Entitlement(); ent.setName("Entitlement"); ent.setTime(1); return ent; } @Bean(name="entitlement2") public Entitlement entitlement2() { Entitlement ent= new Entitlement(); ent.setName("Entitlement2"); ent.setTime(2); return ent; } }
注：
@Configuration可理解为用spring的时候xml里面的<beans>标签
@Bean可理解为用spring的时候xml里面的<bean>标签
Entitlement.java
package com.myapp; public class Entitlement { private String name; private int time; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getTime() { return time; } public void setTime(int time) { this.time = time; } }
测试
JavaConfigTest.java
package com.myapp; import com.myapp.config.AppConfig; import org.springframework.context.annotation.AnnotationConfigApplicationContext; public class JavaConfigTest { public static void main(String[] arg) { AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(); ctx.register(AppConfig.class); ctx.refresh(); Entitlement ent = (Entitlement)ctx.getBean("entitlement"); System.out.println(ent.getName()); System.out.println(ent.getTime()); Entitlement ent2 = (Entitlement)ctx.getBean("entitlement2"); System.out.println(ent2.getName()); System.out.println(ent2.getTime()); ctx.close(); } }
结果
Entitlement 1 Entitlement2 2