读取application文件
在application.yml或者properties文件中添加：
info.address=USA
info.company=Spring
info.degree=high
@Value注解读取方式
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import org.springframework.beans.factory.annotation.Value;import org.springframework.stereotype.Component;
@Componentpublic class InfoConfig1 {
@Value("${info.address}") private String address;
@Value("${info.company}") private String company;
@Value("${info.degree}") private String degree;
public String getAddress() { return address; }
public void setAddress(String address) { this.address = address; }
public String getCompany() { return company; }
public void setCompany(String company) { this.company = company; }
public String getDegree() { return degree; }
public void setDegree(String degree) { this.degree = degree; }
}
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@ConfigurationProperties注解读取方式
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@Component@ConfigurationProperties(prefix = "info")public class InfoConfig2 {
private String address; private String company; private String degree;
public String getAddress() { return address; }
public void setAddress(String address) { this.address = address; }
public String getCompany() { return company; }
public void setCompany(String company) { this.company = company; }
public String getDegree() { return degree; }
public void setDegree(String degree) { this.degree = degree; }
}
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读取指定文件
资源目录下建立config/db-config.properties:
db.username=root\
db.password=123456
@[email protected]注解读取方式
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@Component@PropertySource(value = { "config/db-config.properties" })public class DBConfig1 {
@Value("${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; }
}
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注意：@PropertySource不支持yml文件读取。
@[email protected]注解读取方式
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@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; }
}
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Environment读取方式
以上所有加载出来的配置都可以通过Environment注入获取到。
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@Autowiredprivate Environment env; // 获取参数String getProperty(String key); |
总结
从以上示例来看，Spring Boot可以通过@PropertySource,@Value,@Environment,@ConfigurationProperties来绑定变量。
http://www.javastack.cn/article/2017/spring-boot-load-config/
原文地址：https://www.cnblogs.com/panchanggui/p/10764090.html
时间： 2024-07-29 20:53:52