1、Springboot 注入装配到IOC容器方式

1、通过bean注解装配到IOC容器
     创建装配的类，如下

package com.sboot.pr.bean;

public class BeanPOJO {

	private int id;
	
	private String name;
	
	private int age;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}
	
	
}

通过bean注解装配BeanPOJO到IOC容器

package com.sboot.pr.config;

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

import com.sboot.pr.bean.BeanPOJO;



@Configuration
public class BeanConfig {

	
	@Bean(name = "beanPOJO")
	public BeanPOJO initBeanPOJO() {
		BeanPOJO pojo = new BeanPOJO();
		pojo.setId(1);
		pojo.setName("BeanPOJO");
		pojo.setAge(29);
		return pojo;
	}
}

把装配的BeanPOJO 注入

package com.sboot.pr.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import com.sboot.pr.bean.BeanPOJO;
import com.sboot.pr.bean.ComponentPOJO;
import com.sboot.pr.bean.ComponentScanPOJO;



@RestController
public class TestController {
	
	@Autowired
	private BeanPOJO beanPoJO;

	
	@GetMapping("/boot/getBeanPOJO")
	public BeanPOJO getBeanPOJO() {
		return beanPoJO;
	}
}

访问注入的BeanPOJO信息

http://localhost:1111/boot/getBeanPOJO

2、通过Component注解扫描装配bean到IOC容器

创建装配的类，如下

package com.sboot.pr.bean;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Component;


@Component("componentPOJO")
public class ComponentPOJO {

	@Value("2")
	private int id;
	
	@Value("ComponentPOJO")
	private String name;
	
	@Value("29")
	private int age;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}
	
	
}

把装配的ComponentPOJO  注入

package com.sboot.pr.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import com.sboot.pr.bean.BeanPOJO;
import com.sboot.pr.bean.ComponentPOJO;
import com.sboot.pr.bean.ComponentScanPOJO;



@RestController
public class TestController {
	
	
	@Autowired
	private ComponentPOJO componentPOJO;

    
	@GetMapping("/boot/getComponentPOJO")
	public ComponentPOJO getComponentPOJO() {
		return componentPOJO;
	}

}

 访问注入的ComponentPOJO 信息

http://localhost:1111/boot/getComponentPOJO

 3、通过ComponentScan注解扫描装配bean到IOC容器

创建装配的类，如下

package com.sboot.pr.bean;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;


@Configuration
@ComponentScan
public class ComponentScanPOJO {

	@Value("3")
	private int id;
	
	@Value("ComponentScanPOJO")
	private String name;
	
	@Value("29")
	private int age;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}
	
	
}

把装配的ComponentScanPOJO  注入

package com.sboot.pr.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import com.sboot.pr.bean.BeanPOJO;
import com.sboot.pr.bean.ComponentPOJO;
import com.sboot.pr.bean.ComponentScanPOJO;



@RestController
public class TestController {
	

	@Autowired
	private ComponentScanPOJO componentScanPOJO;

	
	@GetMapping("/boot/getComponentScanPOJO")
	public ComponentScanPOJO getComponentScanPOJO() {
		return componentScanPOJO;
	}
	
	
}

 访问注入的ComponentScanPOJO信息

http://localhost:1111/boot/getComponentScanPOJO