精通SpringBoot——第十一篇：使用自定义配置

今天这篇文章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

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：

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...
浮躁的社会，浮躁的人生，唯有代码，宁静致远。（又开始装13了,见谅.....）

最后，以上示例代码可在我的github.com中找到。 我的个人公众号：developlee的潇洒人生。 关注了也不一定更新，更新就不得了了。