现在开发的主力语言已经从PHP转向Java,目前参与或负责公司的几个项目都是使用Spring Boot框架。用了差不多两三个月的Java,对比PHP就一个感觉:繁琐,Java比PHP繁琐的很!由于自己平时也在努力学习Java中,今天趁着有空闲来总结一下Spring Boot中读取配置的几种方式,加深一下自己的印象。
读取application文件
在application.yml或者properties文件中添加:
info.address=RPC info.company=Spring info.degree=high
1.@Value注解读取方式
import org.springframework.beans.factory.annotation.Value; import org.springframework.stereotype.Component; @Component public class InfoConfig { @Value("${info.address}") private String address; @Value("${info.company}") private String company; @Value("${info.degree}") private String degree; public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getCompany() { return company; } public void setCompany(String company) { this.company = company; } public String getDegree() { return degree; } public void setDegree(String degree) { this.degree = degree; } }
2.@ConfigurationProperties注解读取方式
@Component @ConfigurationProperties(prefix = "info") public class InfoConfig { private String address; private String company; private String degree; public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getCompany() { return company; } public void setCompany(String company) { this.company = company; } public String getDegree() { return degree; } public void setDegree(String degree) { this.degree = degree; } }
读取指定文件
资源目录下建立config/db-config.properties:
db.username=root
db.password=123456
@Component @PropertySource(value = { "config/db-config.properties"} ) public class DBConfig1 { @Value("${db.username}") private String username; @Value("${db.password}") private String password; 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; } }
注意:@PropertySource不支持yml文件读取。
2.@PropertySource+@ConfigurationProperties注解读取方式
@Component @ConfigurationProperties(prefix = "db") @PropertySource(value = {"config/db-config.properties"}) public class DBConfig2 { private String username; private String password; 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; } }
3.Environment读取方式
@Autowired private Environment environment; environment.getProperty("info.degree");
从以上示例来看,Spring Boot可以通过@PropertySource,@Value,@Environment,@ConfigurationProperties的相互配合来读取配置文件的内容,读取单个的配置Environment无疑是最霸道的方法。
最后更新于 2018-05-04 15:14:27 并被添加「java spring boot」标签,已有 8 位童鞋阅读过。