spring-boot系列3：配置文件@ConfigurationProperties

熟悉spring的同学，都知道spring的xml配置文件。下面主要讲解一下@ConfigurationProperties注解类的用法。

知识点

@Configuation等价于<Beans></Beans>

@Bean等价于<Bean></Bean>

@ComponentScan等价于<context:component-scan base-package=”com.dxz.demo”/>

@ConfigurationProperties 主要用来把properties配置文件转化为bean（类）来使用的

需要引入的maven依赖：

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
        </dependency>

举一个简单的案例，先了解一下，然后通过转载的一个博客来了解一下springboot的配置文件的详细讲解。

application.properties

userName=yunxi.shi
password=123456

UserPojo.java

package com.configuration;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;

@Configuration
@ConfigurationProperties
public class UserPojo {

	private String userName;
	private String password;
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	@Override
	public String toString() {
		return "UserPojo [userName=" + userName + ", password=" + password + "]";
	}
	
}

DemoController.java

package com.controller;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.configuration.UserPojo;


 
@RestController
public class DemoController {
	
	@Autowired
	private  UserPojo user;

    @RequestMapping("/hello")
    public String hello(){
        return "hello,spring-boot!!!";
    }
    
    
    @RequestMapping("/user")
    public String user(){
        return user.toString();
    }
}

Application.java

package com.configuration;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;

@Configuration
@ConfigurationProperties
public class UserPojo {

	private String userName;
	private String password;
	public String getUserName() {
		return userName;
	}
	public void setUserName(String userName) {
		this.userName = userName;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	@Override
	public String toString() {
		return "UserPojo [userName=" + userName + ", password=" + password + "]";
	}
	
}

配置文件的详解，我发现了一个很不多的博主写的。

【SpringBoot】— Spring Boot配置文件详解