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

佚名 6年前 (2019-04-17) 随笔 1018人围观抢沙发百度已收录

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

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@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

1 2 3 4 5 <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

1 2 3 4 5 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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 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

1 2 3 4 5 //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。

1.添加pom依赖

1 2 3 4 5 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional> true </optional> </dependency>