每日笔记---使用@ConfigurationProperties读取yml配置
每日笔记---使用@ConfigurationProperties读取yml配置
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 |
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); |
