Spring Boot 之注解@Component @ConfigurationProperties(prefix = "sms") 使用@ConfigurationProperties读取yml配置

从spring-boot开始，已经支持yml文件形式的配置，@ConfigurationProperties的大致作用就是通过它可以把properties或者yml配置直接转成对象

@Component注解表明是组件，可被自动发现，@ConfigurationProperties注解之前是location属性表明配置文件位置，prefix表示读取的配置信息的前缀，但新版本中废除了location属性（网上说是1.5.2之后），故只写前缀，默认读取application.yml中数据。重点！！一定要在这个类中写getter和setter，否则配置中的属性值无法自动注入

例如：

配置文件:
sms.url=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
sms.appkey=XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
sms.secret=XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
sms.signName=XXXXXXXXXXXXXXXXXXXXXXXXXXX
sms.tplCode=XXXXXXXXXXXXXXXXXXXXXXXXXXXX
sms.type=normal

JAVA代码：
@Component
@ConfigurationProperties(prefix = "sms")
public class SmsSettings {
    
    private  String url ="";
    private  String appkey ="";
    private  String secret ="";
    private  String signName ="";
    private  String tplCode ="";
    private  String type ="";
    private  String open ="";
    private  String tplCode2 ="";
    
    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    public String getAppkey() {
        return appkey;
    }
    public void setAppkey(String appkey) {
        this.appkey = appkey;
    }
    public String getSecret() {
        return secret;
    }
    public void setSecret(String secret) {
        this.secret = secret;
    }
    public String getSignName() {
        return signName;
    }
    public void setSignName(String signName) {
        this.signName = signName;
    }
    public String getTplCode() {
        return tplCode;
    }
    public void setTplCode(String tplCode) {
        this.tplCode = tplCode;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    public String getOpen() {
        return open;
    }
    public void setOpen(String open) {
        this.open = open;
    }
    public String getTplCode2() {
        return tplCode2;
    }
    public void setTplCode2(String tplCode2) {
        this.tplCode2 = tplCode2;
    }
    
}

通过注解@ConfigurationProperties来配置redis

@Configuration    
@EnableAutoConfiguration  
public class RedisConfig {  
      
    @Bean    
    @ConfigurationProperties(prefix="spring.redis.poolConfig")    
    public JedisPoolConfig getRedisConfig(){    
        JedisPoolConfig config = new JedisPoolConfig();  
        return config;    
    }    
        
    @Bean    
    @ConfigurationProperties(prefix="spring.redis")    
    public JedisConnectionFactory getConnectionFactory(){    
        JedisConnectionFactory factory = new JedisConnectionFactory();    
        factory.setUsePool(true);  
        JedisPoolConfig config = getRedisConfig();    
        factory.setPoolConfig(config);    
        return factory;    
    }    
        
        
    @Bean    
    public RedisTemplate<?, ?> getRedisTemplate(){    
        RedisTemplate<?,?> template = new StringRedisTemplate(getConnectionFactory());    
        return template;    
    }    
      
}  

1.添加pom依赖

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

 2.application.yml文件中添加需要配置的属性，注意缩进

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Myyml:   username: cs   password: 123456   url: jdbc:mysql://localhost:3306/test   driver: com.mysql.jdbc.Driver

 3.新建一个类，@Component注解表明是组件，可被自动发现，@ConfigurationProperties注解之前是location属性表明配置文件位置，prefix表示读取的配置信息的前缀，但新版本中废除了location属性（网上说是1.5.2之后），故只写前缀，默认读取application.yml中数据。重点！！一定要在这个类中写getter和setter，否则配置中的属性值无法自动注入

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package com.cs.background.util;     import lombok.ToString; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component;     @Component @ConfigurationProperties(prefix = "Myyml") public class User{     //数据库连接相关     private String url;     private String driver;     private String username;     private String password;       public String getUrl() {         return url;     }       public void setUrl(String url) {         this.url = url;     }       public String getDriver() {         return driver;     }       public void setDriver(String driver) {         this.driver = driver;     }       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;     } }

 4.Controller类中执行自动注入，获取属性

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//自动注入    @Autowired private User user;<br> //方法体内获取属性值 String url=user.getUrl();<br>System.out.print(url);

 5.启动springboot入口类，调用对应controller对应的方法，控制台打印获取的值。