SpringBoot学习（三）-----配置Bean

一.配置Bean的方式一

我们可以使用注解@ImportResource引入SpringBean.xml

首先建立一个SpringBoot,添加SpringBootApp.java、beans.xml、HelloService.java、SpringBoottest.java如下：

HelloService.java

package com.zk.service;

public class HelloService {

}

beans.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

<bean id="HelloService" class="com.zk.service.HelloService"></bean>
</beans>

SpringBootApp.java

package com.zk.myspringboot005Controller;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ImportResource;
@SpringBootApplication
@ImportResource(locations={"classpath:beans.xml"})
//@ImportResource：导入spring配置文件让配置文件的内容生效
public class SpringBootApp{

	public static void main(String[]args){
		SpringApplication.run(SpringBootApp.class, args);
	}
}

SpringBoottest.java

package com.zk.myspringboottest;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Import;
import org.springframework.test.context.junit4.SpringRunner;

import com.zk.myspringboot005Controller.SpringBootApp;
import com.zk.service.HelloService;

@RunWith(SpringRunner.class)
@SpringBootTest(classes={SpringBootApp.class})
@Import(HelloService.class)
public class SpringBoottest {
	
	@Autowired
	private ConfigurableApplicationContext ioc;
	
	HelloService helloservice;
	
	@Test
	public void testHelloService(){
		System.out.println(ioc.containsBean("HelloService"));
	}
	
}

　运行SpringBoottest.class，运行结果如下：

 这里需要注意，使用@ImportResource引入bean.xml

//@ImportResource：导入spring配置文件让配置文件的内容生效
@ImportResource(locations={"classpath:beans.xml"})

二.配置Bean的方式二

SpringBootApp.java

package com.zk.myspringboot005Controller;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ImportResource;
@SpringBootApplication
public class SpringBootApp{

	public static void main(String[]args){
		SpringApplication.run(SpringBootApp.class, args);
	}
}

ConfigBean.java

package com.zk.myspringboot005Controller;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.zk.service.HelloService;

/*
 * 指明当前类是配置类,用当前类代替Spring
 * 在配置文件中使用Bean标签增加组件。
 * */
@Configuration
public class ConfigBean {
	@Bean
	public HelloService HelloService(){
		return new HelloService();
	}
}

HelloService.java

package com.zk.service;

public class HelloService {
	public static void sayHello(){
		System.out.println("Hello,Service");
	}
}

SpringBoottest.java

package com.zk.myspringboottest;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.test.context.junit4.SpringRunner;

import com.zk.myspringboot005Controller.SpringBootApp;
import com.zk.service.HelloService;

@RunWith(SpringRunner.class)
@SpringBootTest(classes={SpringBootApp.class})
public class SpringBoottest {
	@Autowired
	private ConfigurableApplicationContext ioc;
	
	HelloService helloservice;
	
	@Autowired
        private ApplicationContext ac;
	
	@Test
	public void testHelloService(){
		System.out.println(ioc.containsBean("HelloService"));
		helloservice.sayHello();
		boolean flag=ac.containsBean("HelloService");
		System.out.println(flag);
	}
	
}

运行结果如下：

pom.xml文件配置

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.zk.myspringboot_003</groupId>
  <artifactId>myspringBoot_003</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <properties>
	<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
    <finalName>myspringboot_003</finalName>
  </build>
  <dependencies>
	    <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-configuration-processor</artifactId>
			<optional>true</optional>
		</dependency>
		<!-- 继承父包 -->
		<dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-test</artifactId>
         <scope>test</scope>
         </dependency>
         <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-autoconfigure</artifactId>
        </dependency>
	</dependencies>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.3.RELEASE</version>
	</parent>  
</project>