SpringBoot入门之SpringBoot读取自定义properties文件 11

布满荆棘的人生 2021-11-09 00:18 827阅读 0赞

# 11. SpringBoot读取自定义properties文件 #

**注意:自定义配置文件只能使用.propeties的后缀自定义.**

## 11.1 resources下创建一个mail.properties配置文件 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70]

mail.host=acece.com
    mail.port=25
    mail.username=啊策策
    mail.password=123456

## 11.2 domain包下创建一个MailProperties.java类 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 1]  
**需要在MailProperties.java上添加3个注解,这样才能使MailProperties.java和mail.properties配置文件产生映射关系.**

*  @ConfigurationProperties(prefix = “mail”): 因为MailProperties.java中的成员变量只有后缀,而mail.properties中每一行配置文件是由前缀**mail**和后缀**成员变量**两部分组成,所以要配置好前缀.
 *  @PropertySource(value=“classpath:mail.properties”): 指明自定义的配置文件路径
 *  @Configuration或者@Component: 包扫描, 就是SpringBoot启动时,加载MailProperties.java类,创建对象.

package com.acece.domain;
    
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.PropertySource;
    import org.springframework.stereotype.Component;
    
    /** * @author 啊策策 * @date 2019-08-06 19:09 */
    @ConfigurationProperties(prefix = "mail") //配置文件的前缀
    @PropertySource(value = "classpath:mail.properties") //写明自定义的配置文件路径
    @Configuration //包扫描,springBoot启动自动创建该mailproperties对象
    public class MailProperties { 
    
        private String host;
        private String port;
        private String username;
        private String password;
    
    
        @Override
        public String toString() { 
            return "MailProperties{" +
                    "host='" + host + '\'' +
                    ", port='" + port + '\'' +
                    ", username='" + username + '\'' +
                    ", password='" + password + '\'' +
                    '}';
        }
    }

## 11.3 test包下生成测试代码 ##

还是在之前读取application.properties配置文件的类中,生成新的@Test方法,  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 2]

package com.acece;
    
    import com.acece.domain.MailProperties;
    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.core.env.Environment;
    import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
    
    /** * @author 啊策策 * @date 2019-08-06 18:17 */
    @RunWith(SpringJUnit4ClassRunner.class)
    @SpringBootTest(classes=SpringBootApplicationRunner.class)
    public class SpringBootReadThing { 
    
        @Autowired
        private Environment environment;
    
        /** * 读取application.properties配置文件 */
        @Test
        public void readProperties(){ 
            System.out.println(environment.getProperty("spring.datasource.url")+"*****************");
        }
    
        /** * 读取自定义的mail.properties配置文件 */
        @Test
        public void readSelfDefine(){ 
            System.err.println(environment.getProperty("mail.host")+"******************88");
        }
    }

## 11.4 启动@Test readSelfDefine()方法 ##

![在这里插入图片描述][20190807115438718.png]  
控制台打印出结果, **自定义配置文件读取成功~**

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70]: /images/20211108/5b12d870238d4f8e9ec679278289b6f7.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 1]: /images/20211108/c95d213f83b54f31b06e9764e892605f.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjY0MTkwOQ_size_16_color_FFFFFF_t_70 2]: /images/20211108/5498de3e831544ea943479dd7507fcf6.png
[20190807115438718.png]: /images/20211108/ed0513f27a2c4148be60c35f53587bbd.png