springboot系列 | 配置文件

其他 2018-09-10 10:29:57 阅读次数: 0
版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/u011320740/article/details/79239827

可采用该网站https://start.spring.io/进行springboot项目创建

生成pom.xml文件内容：

<?xml version="1.0" encoding="UTF-8"?>
<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.cwh</groupId>
	<artifactId>springbootConfig</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>springbootConfig</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.10.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>


</project>
以下都使用该pom.xml文件

一、自定义属性

当我们新建一个springboot项目时该目录/src/main/resources下会有一个application.properties配置文件，我们自定义属性在该文件进行自定义，添加以下两个属性：

my.name: cwh
my.age: 25
然后进行读取配置文件的属性值： 

package com.cwh.springbootConfig.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @Value("${my.name}")
    private String name;
    @Value("${my.age}")
    private int age;

    @RequestMapping(value = "/hello")
    public String hello(){
        return "hello:"+name+":"+age;
    }

}
运行以下代码即可： 

package com.cwh.springbootConfig;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringbootConfigApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringbootConfigApplication.class, args);
	}
}
通过浏览器访问http://localhost:8080/hello: 

hello:cwh:25


二、配置文件属性值注入实体类

配置文件添加如下内容：

my.name: cwh
my.age: 25
my.number:  ${random.int}
my.uuid ${random.uuid}
my.max: ${random.int(10)}
my.value: ${random.value}
my.greeting: hi,i'm  ${my.name}
实体类： 

package com.cwh.springbootConfig.model;

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


@ConfigurationProperties(prefix = "my")
//@Component
public class User {

	private String name;
    private int age;
    private int number;
    private String uuid;
    private int max;
    private String value;
    private String greeting;
	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;
	}
	public int getNumber() {
		return number;
	}
	public void setNumber(int number) {
		this.number = number;
	}
	public String getUuid() {
		return uuid;
	}
	public void setUuid(String uuid) {
		this.uuid = uuid;
	}
	public int getMax() {
		return max;
	}
	public void setMax(int max) {
		this.max = max;
	}
	public String getValue() {
		return value;
	}
	public void setValue(String value) {
		this.value = value;
	}
	public String getGreeting() {
		return greeting;
	}
	public void setGreeting(String greeting) {
		this.greeting = greeting;
	}
    
    
}
注意： "@ConfigurationProperties"主动加载resource下的application.properties文件

新建controller: 

package com.cwh.springbootConfig.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.cwh.springbootConfig.model.User;

@RestController
@EnableConfigurationProperties({User.class})
public class UserController {

	@Autowired
    User user;

    @RequestMapping(value = "/user")
    public String user(){
        return user.getGreeting()+" >>>>"+user.getName()+" >>>>"+ user.getUuid()+" >>>>"+user.getMax();
    }
}
注意：@EnableConfigurationProperties({User.class})如果有该注解那么User里不需要@Component这个注解，如果User里写有@Component，该注解可以不需要


运行浏览器访问http://localhost:8080/user:

hi,i'm cwh >>>>cwh >>>>b86fa46c-b294-474e-8df9-a7c1848a61a2 >>>>8

三、自定义配置文件
新建自定义配置文件test.properties： 

hello.name: menco
hello.age: 25
hello.number:  ${random.int}
hello.uuid ${random.uuid}
hello.max: ${random.int(10)}
hello.value: ${random.value}
hello.greeting: hi,i'm  ${hello.name}
实体类： 

package com.cwh.springbootConfig.model;

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

@Configuration
@PropertySource(value = "classpath:test.properties")
@ConfigurationProperties(prefix = "hello")


//@Component
public class User {

	private String name;
    private int age;
    private int number;
    private String uuid;
    private int max;
    private String value;
    private String greeting;
	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;
	}
	public int getNumber() {
		return number;
	}
	public void setNumber(int number) {
		this.number = number;
	}
	public String getUuid() {
		return uuid;
	}
	public void setUuid(String uuid) {
		this.uuid = uuid;
	}
	public int getMax() {
		return max;
	}
	public void setMax(int max) {
		this.max = max;
	}
	public String getValue() {
		return value;
	}
	public void setValue(String value) {
		this.value = value;
	}
	public String getGreeting() {
		return greeting;
	}
	public void setGreeting(String greeting) {
		this.greeting = greeting;
	}
    
    
}
注意："@ConfigurationProperties"主动加载resource下的application.properties文件，如果自定义一个其他名配置文件可以加上以上两个注解@Configuration和@PropertySource,需要注意一点是：自定义的test.properties如果也是和application.properties的prefix一样的话，那么他还是会去自动加载application.properties文件
运行访问http://localhost:8080/user： 

hi,i'm menco >>>>menco >>>>bd054df6-5565-48a5-b99e-c3611481c910 >>>>1

四、多配置文件切换

新建application-dev.properties，命名规则application-***.properties：

my.name: dev
my.age: 25
my.number:  ${random.int}
my.uuid ${random.uuid}
my.max: ${random.int(10)}
my.value: ${random.value}
my.greeting: hi,i'm  ${my.name}
在application.properties添加如下内容： 

##use application-dev.properties
spring.profiles.active: dev
注意：dev对应上面配置文件的命名规则***

实体类：

package com.cwh.springbootConfig.model;

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

@ConfigurationProperties(prefix = "my")

//@Component
public class User {

	private String name;
    private int age;
    private int number;
    private String uuid;
    private int max;
    private String value;
    private String greeting;
	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;
	}
	public int getNumber() {
		return number;
	}
	public void setNumber(int number) {
		this.number = number;
	}
	public String getUuid() {
		return uuid;
	}
	public void setUuid(String uuid) {
		this.uuid = uuid;
	}
	public int getMax() {
		return max;
	}
	public void setMax(int max) {
		this.max = max;
	}
	public String getValue() {
		return value;
	}
	public void setValue(String value) {
		this.value = value;
	}
	public String getGreeting() {
		return greeting;
	}
	public void setGreeting(String greeting) {
		this.greeting = greeting;
	}
    
    
}

运行访问http://localhost:8080/user：

hi,i'm dev >>>>dev >>>>bd054df6-5565-48a5-b99e-c3611481c910 >>>>1

源码下载地址： https://github.com/Menc0/springbootConfig






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