参考地址 https://www.cnblogs.com/mycs-home/p/8352140.html
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
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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 @Autowiredprivate User user;<br>
//方法体内获取属性值String url=user.getUrl();<br>System.out.print(url); |