精通SpringBoot：使用自定义配置

给大家介绍自定义配置的两种方式
第一式：使用@ConfigurationProperties，且看代码

package com.developlee.customconfig.config;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.NestedConfigurationProperty;
import org.springframework.context.annotation.Configuration;

/**
* @author Lensen
* @desc
* @since 2018/8/22 12:59
*/
@Configuration
@ConfigurationProperties(prefix = “one-app”)
public class OneAppConfig {

@NestedConfigurationProperty
public Account account = new Account();

public String appName;

public Account getAccount() {
    return account;
}

public void setAccount(Account account) {
    this.account = account;
}

public String getAppName() {
    return appName;
}

public void setAppName(String appName) {
    this.appName = appName;
}

public class Account {
    private String username;
    private String password;
    private String age;

    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;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }
}

}
很明显，这就是我们要在properties文件中要配置的配置项。
再看第二种方式

/**
* @author Lensen
* @desc
* @since 2018/8/22 13:19
*/
@Configuration
public class TwoAppConfig {
@Value(“${two-app.welcome.message}”)
public String twoAppWelcomeMessage;

@Value("${two-app.welcome.person}")
public String twoAppWelcomePerson;

public String getTwoAppWelcomeMessage() {
    return twoAppWelcomeMessage;
}

public void setTwoAppWelcomeMessage(String twoAppWelcomeMessage) {
    this.twoAppWelcomeMessage = twoAppWelcomeMessage;
}

public String getTwoAppWelcomePerson() {
    return twoAppWelcomePerson;
}

public void setTwoAppWelcomePerson(String twoAppWelcomePerson) {
    this.twoAppWelcomePerson = twoAppWelcomePerson;
}

}
这个就简单粗暴啦。没有第一种方式结构那么清晰，具体怎么使用，完全取决于项目配置项的关联关系和复杂度，需要大家根据实际情况权衡。
接下来我写了个简单的测试类，来获取我们的配置信息
先看配置文件：

one-app:
app-name: OneAPP
account:
username: Lensen
password: Orcl
age: 22

two-app:
welcome:
message: welcome to lensen’s bolg
person: LENSEN
一个简单的Controller类

package com.developlee.customconfig.controller;

import com.developlee.customconfig.config.OneAppConfig;
import com.developlee.customconfig.config.TwoAppConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
* @author Lensen
* @desc
* @since 2018/8/22 16:40
*/
@RestController
public class AppController {
@Autowired
private OneAppConfig oneAppConfig;
@Autowired
private TwoAppConfig twoAppConfig;

@GetMapping("/hello")
public ResponseEntity getConfig() {
    String str1 = "oneAppConfig: " + oneAppConfig.getAppName() + oneAppConfig.getAccount().getUsername()
            + oneAppConfig.getAccount().getPassword() + oneAppConfig.getAccount().getAge();
    String str2 = "twoAppConfig: " + twoAppConfig.getTwoAppWelcomePerson() + twoAppConfig.getTwoAppWelcomeMessage();
    return new ResponseEntity(str1 +"~~~~~~~"+ str2, HttpStatus.OK);
}

}
在地址栏输入http:localhost:8080/hello, 回车
image
也可以自己指定文件，只需在类上加上注解@PropertySource注解就好了~~

@Configuration
@PropertySource(“classpath:my.properties”)
public class ThreeConfig {

@Value("${my.name}")
private String myName;

public String getMyName() {
    return myName;
}

public void setMyName(String myName) {
    this.myName = myName;
}

}
my.properties文件内容：

my.name=developlee
测试结果：
image

如果配置文件是yml格式的，则要使用YamlPropertiesFactoryBean来加载并设置到PropertySourcesPlaceholderConfigurer中

// 加载YML格式自定义配置文件
@Bean
public static PropertySourcesPlaceholderConfigurer properties() {
PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();
YamlPropertiesFactoryBean yaml = new YamlPropertiesFactoryBean();
yaml.setResources(new FileSystemResource(“config.yml”));//File引入
// yaml.setResources(new ClassPathResource(“youryml.yml”));//class引入
configurer.setProperties(yaml.getObject());
return configurer;
end…

精通SpringBoot：使用自定义配置

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