在springboot框架中，配置文件永远是最核心的，小伙伴们知道springboot中配置文件的读取有哪几种常用方式吗?下面就一起来看看吧。
一、使用@ImportResource注解#
这个注解可以用来导入Spring的配置文件，使配置文件中内容注入到配置类中，参数是一个数组，并且可以注入多个配置文件。
示例：
在SpringBoot的resources目录下创建一个xml配置文件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="configBean" class="com.example.test.config.ConfigBean"> <property name="dbType" value="Oracle"/> <property name="driverClassName" value="jdbc.driver.Oracle.OracleDriver"/> <property name="host" value="127.0.0.1"/> <property name="userName" value="oracle"/> <property name="password" value="oracle"/> </bean> </beans>
创建配置类ConfigBean
package com.example.test.config;
import lombok.Getter;
import lombok.Setter;
import lombok.ToString;
/**
* @author Vincente
* @date 2020/07/12-12:29
* @desc 配置类
**/
@Setter
@Getter
@ToString
public class ConfigBean
{
private String dbType;
private String driverClassName;
private String host;
private String userName;
private String password;
}添加@ImportResource注解，在springboot项目的启动类添加
package com.example.test;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ImportResource;
@SpringBootApplication
@ImportResource(locations = {
"classpath:beans.xml"
})
public class TestApplication
{
public static void main(String[] args)
{
SpringApplication.run(TestApplication.class, args);
}
}测试代码
package com.example.test;
import com.example.test.config.ConfigBean;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@SpringBootTest
@RunWith(SpringRunner.class)
class TestApplicationTests
{
@Autowired
private ConfigBean configBean;
@Test
void testConfigBean()
{
System.out.println(configBean);
}
}结果
ConfigBean(dbType = Oracle, driverClassName = jdbc.driver.Oracle.OracleDriver, host = 127.0 .0 .1, userName = oracle, password = oracle)
二、@ConfigurationProperties注解与@Value注解
示例：
创建配置文件application.yml
db - config: db - type: Oracle driver - class - name: jdbc.driver.Ooracle.OracleDriver host: 127.0 .0 .1 user - name: Oracle password: Oracle server: port: 8080
创建配置类ConfigBean
package com.example.test.config;
import lombok.Getter;
import lombok.Setter;
import lombok.ToString;
import org.springframework.boot.context.properties.ConfigurationProperties;
/**
* @author Vincente
* @date 2020/07/12-12:29
* @desc 配置类
**/
@Setter
@Getter
@ToString
@ConfigurationProperties(prefix = "db-config")
public class ConfigBean
{
private String dbType;
private String driverClassName;
private String host;
private String userName;
private String password;
}测试代码
package com.example.test;
import com.example.test.config.ConfigBean;
import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import javax.annotation.Resource;
@SpringBootTest
@RunWith(SpringRunner.class)
class TestApplicationTests
{
@Resource
ConfigBean configBean;
@Value("${server.port}")
private String port;
@Test
void testConfigBean()
{
System.out.println(configBean);
System.out.println(port);
}
}输出结果
ConfigBean(dbType = Oracle, driverClassName = jdbc.driver.Ooracle.OracleDriver, host = 127.0 .0 .1, userName = Oracle, password = Oracle) 8080
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