在Spring Boot中使用 @ConfigurationProperties 注解， @EnableConfigurationProperties
但 Spring Boot 提供了另一种方式 ，能够根据类型校验和管理application中的bean。 这里会介绍如何使用@ConfigurationProperties。
继续使用mail做例子。配置放在mail.properties文件中。属性必须命名规范才能绑定成功。举例：
1 protocol and PROTOCOL will be bind to protocol field of a bean
2 smtp-auth , smtp_auth , smtpAuth will be bind to smtpAuth field of a bean
3 smtp.auth will be bind to … hmm to smtp.auth field of a bean!
Spring Boot 使用一些松的规则来绑定属性到@ConfigurationProperties bean 并且支持分层结构（hierarchical structure）。
开始创建一个@ConfigurationProperties bean:
package com.dxz.property; import org.springframework.boot.context.properties.ConfigurationProperties; @ConfigurationProperties(locations = "classpath:mail.properties", ignoreUnknownFields = false, prefix = "mail")
public class MailProperties {
private String host;
private int port;
private String from;
private String username;
private String password;
private Smtp smtp; // ... getters and setters
public String getHost() {
return host;
} public void setHost(String host) {
this.host = host;
} public int getPort() {
return port;
} public void setPort(int port) {
this.port = port;
} public String getFrom() {
return from;
} public void setFrom(String from) {
this.from = from;
} 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 Smtp getSmtp() {
return smtp;
} public void setSmtp(Smtp smtp) {
this.smtp = smtp;
} @Override
public String toString() {
return "MailProperties [host=" + host + ", port=" + port + ", from=" + from + ", username=" + username
+ ", password=" + password + ", smtp=" + smtp + "]";
} public static class Smtp {
private boolean auth;
private boolean starttlsEnable; public boolean isAuth() {
return auth;
} public void setAuth(boolean auth) {
this.auth = auth;
} public boolean isStarttlsEnable() {
return starttlsEnable;
} public void setStarttlsEnable(boolean starttlsEnable) {
this.starttlsEnable = starttlsEnable;
} }
}
如下属性中创建 ( mail.properties )：
mail.host=localhost
mail.port=25
mail.smtp.auth=false
mail.smtp.starttls-enable=false
mail.from=me@localhost
mail.username=duan
mail.password=duan123456
上例中我们用@ConfigurationProperties注解就可以绑定属性了。ignoreUnknownFields = false告诉Spring Boot在有属性不能匹配到声明的域的时候抛出异常。开发的时候很方便! prefix 用来选择哪个属性的prefix名字来绑定。
请注意setters 和 getters 需要在@ConfigurationProperties bean中创建! 与@Value注解相反。
我们需要用属性来配置 application。 有至少两种方式来创建@ConfigurationProperties。即可以搭配@Configuration 注解来提供 @Beans 也可以单独使用并注入 @Configuration bean。
方案1:定义spring的一个实体bean装载配置文件信息，其它要使用配置信息是注入该实体bean
package com.dxz.property3; import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component; @Component
@ConfigurationProperties(locations = "classpath:mail.properties", ignoreUnknownFields = false, prefix = "mail")
public class MailProperties {
private String host;
private int port;
private String from;
private String username;
private String password;
private Smtp smtp; // ... getters and setters
public String getHost() {
return host;
} public void setHost(String host) {
this.host = host;
} public int getPort() {
return port;
} public void setPort(int port) {
this.port = port;
} public String getFrom() {
return from;
} public void setFrom(String from) {
this.from = from;
} 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 Smtp getSmtp() {
return smtp;
} public void setSmtp(Smtp smtp) {
this.smtp = smtp;
} @Override
public String toString() {
return "MailProperties [host=" + host + ", port=" + port + ", from=" + from + ", username=" + username
+ ", password=" + password + ", smtp=" + smtp + "]";
} public static class Smtp {
private boolean auth;
private boolean starttlsEnable; public boolean isAuth() {
return auth;
} public void setAuth(boolean auth) {
this.auth = auth;
} public boolean isStarttlsEnable() {
return starttlsEnable;
} public void setStarttlsEnable(boolean starttlsEnable) {
this.starttlsEnable = starttlsEnable;
} }
}
启动及测试类：
package com.dxz.property3; import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController; @RestController
@SpringBootApplication
//@EnableConfigurationProperties(MailProperties.class)
public class TestProperty3 { @Autowired
private MailProperties mailProperties; @RequestMapping(value = "/hello", method = RequestMethod.GET)
@ResponseBody
public String hello() {
System.out.println("mailProperties" + mailProperties);
return "hello world";
} public static void main(String[] args) {
//SpringApplication.run(TestProperty1.class, args);
new SpringApplicationBuilder(TestProperty3.class).web(true).run(args); }
}
结果：
mailPropertiesMailProperties [host=localhost, port=25, from=me@localhost, username=duan, password=duan123456, smtp=com.dxz.property3.MailProperties$Smtp@37cebacb]
方案2：@Bean+@ConfigurationProperties
我们还可以把@ConfigurationProperties还可以直接定义在@bean的注解上，这是bean实体类就不用@Component和@ConfigurationProperties了
package com.dxz.property4;
public class MailProperties {
private String host;
private int port;
private String from;
private String username;
private String password;
private Smtp smtp;
// ... getters and setters
public String getHost() {
return host;
}
public void setHost(String host) {
this.host = host;
}
public int getPort() {
return port;
}
public void setPort(int port) {
this.port = port;
}
public String getFrom() {
return from;
}
public void setFrom(String from) {
this.from = from;
}
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 Smtp getSmtp() {
return smtp;
}
public void setSmtp(Smtp smtp) {
this.smtp = smtp;
}
@Override
public String toString() {
return "MailProperties [host=" + host + ", port=" + port + ", from=" + from + ", username=" + username
+ ", password=" + password + ", smtp=" + smtp + "]";
}
public static class Smtp {
private boolean auth;
private boolean starttlsEnable;
public boolean isAuth() {
return auth;
}
public void setAuth(boolean auth) {
this.auth = auth;
}
public boolean isStarttlsEnable() {
return starttlsEnable;
}
public void setStarttlsEnable(boolean starttlsEnable) {
this.starttlsEnable = starttlsEnable;
}
}
}
配置类（启动类）
package com.dxz.property4; import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean; @SpringBootApplication
public class TestProperty4 { @Bean
@ConfigurationProperties(locations = "classpath:mail.properties", prefix = "mail")
public MailProperties mailProperties(){
MailProperties mp = new MailProperties();
System.out.println("zheli " + mp);
return mp; } public static void main(String[] args) {
//SpringApplication.run(TestProperty1.class, args);
new SpringApplicationBuilder(TestProperty4.class).web(true).run(args); }
}
测试类：
package com.dxz.property4; import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController; @RestController
@RequestMapping("/task")
public class TaskController { @Autowired
MailProperties mailProperties; @RequestMapping(value = {"/",""})
public String hellTask(){
System.out.println("mailProperties" +mailProperties);
return "hello task !!";
} }
结果：
方案3:@ConfigurationProperties + @EnableConfigurationProperties
我们和上面例子一样注解属性，然后用 Spring的@Autowire来注入 mail configuration bean:
package com.dxz.property; import org.springframework.boot.context.properties.ConfigurationProperties; @ConfigurationProperties(locations = "classpath:mail.properties", ignoreUnknownFields = false, prefix = "mail")
public class MailProperties {
private String host;
private int port;
private String from;
private String username;
private String password;
private Smtp smtp; // ... getters and setters
public String getHost() {
return host;
} public void setHost(String host) {
this.host = host;
} public int getPort() {
return port;
} public void setPort(int port) {
this.port = port;
} public String getFrom() {
return from;
} public void setFrom(String from) {
this.from = from;
} 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 Smtp getSmtp() {
return smtp;
} public void setSmtp(Smtp smtp) {
this.smtp = smtp;
} @Override
public String toString() {
return "MailProperties [host=" + host + ", port=" + port + ", from=" + from + ", username=" + username
+ ", password=" + password + ", smtp=" + smtp + "]";
} public static class Smtp {
private boolean auth;
private boolean starttlsEnable; public boolean isAuth() {
return auth;
} public void setAuth(boolean auth) {
this.auth = auth;
} public boolean isStarttlsEnable() {
return starttlsEnable;
} public void setStarttlsEnable(boolean starttlsEnable) {
this.starttlsEnable = starttlsEnable;
} }
}
启动类及测试类：
package com.dxz.property; import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController; @RestController
@SpringBootApplication
@EnableConfigurationProperties(MailProperties.class)
public class TestProperty1 { @Autowired
private MailProperties mailProperties; @RequestMapping(value = "/hello", method = RequestMethod.GET)
@ResponseBody
public String hello() {
System.out.println("mailProperties" + mailProperties);
return "hello world";
} public static void main(String[] args) {
//SpringApplication.run(TestProperty1.class, args);
new SpringApplicationBuilder(TestProperty1.class).web(true).run(args); }
}
结果：
请注意@EnableConfigurationProperties注解。该注解是用来开启对@ConfigurationProperties注解配置Bean的支持。也就是@EnableConfigurationProperties注解告诉Spring Boot 能支持@ConfigurationProperties。如果不指定会看到如下异常:
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.dxz.property.MailProperties] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
注意: 还有其他办法 (Spring Boot 总是有其他办法!) 让@ConfigurationProperties beans 被添加 – 用@Configuration或者 @Component注解, 这样就可以在 component scan时候被发现了。
总结：
@ConfigurationProperties很方便使用。 比用@Value注解好吗? 在特定的方案中是的,这只是一个选择问题。
看下Spring Boot的文档有更多的关于typesafe configuration 属性
转自原文：https://www.cnblogs.com/duanxz/p/4520571.html
在Spring Boot中使用 @ConfigurationProperties 注解， @EnableConfigurationProperties的更多相关文章
- 在Spring Boot中使用 @ConfigurationProperties 注解
但 Spring Boot 提供了另一种方式 ,能够根据类型校验和管理application中的bean. 这里会介绍如何使用@ConfigurationProperties.继续使用mail做例子. ...
- Spring Boot 中使用 @ConfigurationProperties 注解
@ConfigurationProperties 主要作用:绑定 application.properties 中的属性 例如: @Configuration public class DataSou ...
- 在Spring Boot中使用 @ConfigurationProperties 注解 （二十六）
@ConfigurationProperties主要作用:就是绑定application.properties中的属性 java代码 @Configuration public class DataS ...
- 利用 Spring Boot 中的 @ConfigurationProperties，优雅绑定配置参数
使用 @Value("${property}") 注释注入配置属性有时会很麻烦,尤其是当你使用多个属性或你的数据是分层的时候. Spring Boot 引入了一个可替换的方案 -- ...
- Spring Boot中使用MyBatis注解配置详解（1）
之前在Spring Boot中整合MyBatis时,采用了注解的配置方式,相信很多人还是比较喜欢这种优雅的方式的,也收到不少读者朋友的反馈和问题,主要集中于针对各种场景下注解如何使用,下面就对几种常见 ...
- 如何优雅地在 Spring Boot 中使用自定义注解，AOP 切面统一打印出入参日志 | 修订版
欢迎关注个人微信公众号: 小哈学Java, 文末分享阿里 P8 资深架构师吐血总结的 <Java 核心知识整理&面试.pdf>资源链接!! 个人网站: https://www.ex ...
- Spring Boot 中使用 @Transactional 注解配置事务管理
事务管理是应用系统开发中必不可少的一部分.Spring 为事务管理提供了丰富的功能支持.Spring 事务管理分为编程式和声明式的两种方式.编程式事务指的是通过编码方式实现事务:声明式事务基于 AOP ...
- Spring Boot中使用@Transactional注解配置事务管理
事务管理是应用系统开发中必不可少的一部分.Spring 为事务管理提供了丰富的功能支持.Spring 事务管理分为编程式和声明式的两种方式.编程式事务指的是通过编码方式实现事务:声明式事务基于 AOP ...
- Spring boot中相关的注解
一.相关类中使用的注解 @RestController:REST风格的控制器 @RequestMapping:配置URL和方法之间的映射 @SpringBootApplication:应用程序入口类 ...
随机推荐
- android之自定义弹框
step1 创建窗体 final AlertDialog dialog =new Builder(this).create(); step2 获取View View viewDialog =View. ...
- 搭建ldap自助修改密码系统--Self Service Password
系统版本:centos6 Self Service Password版本:1.1 服务安装: 安装依赖:yum install php70-ldap.x86_64 -y (版本尽量大于5.3,否则会提 ...
- MSF基础应用
实践目标 掌握metasploit的基本应用方式. 具体需要完成(1)ms08_067;(2)ms11_050:(3)Adobe(4)成功应用任何一个辅助模块. 报告 虚拟机:可以找我拷贝(我一般都在 ...
- host文件的作用
什么是host文件 Hosts是一个没有扩展名的系统文件,其基本作用就是将一些常用的网址域名与其对应的IP地址建立一个关联“数据库”,当用户在浏览器中输入一个需要登录的网址时,系统会首先自动从Host ...
- Codeforces 375C Circling Round Treasures - 最短路 - 射线法 - 位运算
You have a map as a rectangle table. Each cell of the table is either an obstacle, or a treasure wit ...
- topcoder srm 698 div1 -3
1.定义重复串$S=T+T$,即$S$可以表示成一个串的叠加.给定一个串$s$,可以通过删除字符.修改字符.增加字符来使得其变为重复串.问最少的次数. 思路:首先将$s$分成个串$s_{0},s_{1 ...
- CSS的再深入3（更新中···）
在前面,我们学习了标准文档流,但在实际制作的过程中,用标准文档流书写显然是不现实的,因此,我们来了解几种脱离标准文档流的方法: 1.float 浮动 float:left/right:(左浮/右浮) ...
- Android 充电信息的获取【转】
本文转载自:https://blog.csdn.net/wateryi/article/details/50834821 在android系统中,电池信息是由BatteryService.java统一 ...
- 360搜索引擎取真实地址-python代码
还是个比较简单的,不像百度有加密算法 分析 http://www.so.com/link?url=http%3A%2F%2Fedu.sd.chinamobile.com%2Findex%2Fnews. ...
- SQL 多行合并一行
select stuff((select ',' + CONVERT(VARCHAR(50),id)+'' from tab_menu group by id for xml path('')), ...