springboot @value 注解的使用

1，通过@value来注入对应的值，直接在字段上添加@value 获取application.properties文件中的值。

@Configuration
public class DemoConfig {
    
    @Value("${jdbc.driver}")
    private String driver;
    
    @Value("${jdbc.url}")
    private String url;
    
    @Value("${jdbc.username}")
    private String username;
    
    @Value("${jdbc.password}")
    private String password;

    public DemoConfig() {
        System.out.println(password);
    }

    public String getDriver() {
        return driver;
    }

    public void setDriver(String driver) {
        this.driver = driver;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    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;
    }

    @Override
    public String toString() {
        return "DemoConfig [driver=" + driver + ", url=" + url + ", username=" + username + ", password=" + password
                + "]";
    }

    
    
    

}

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