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。