@ConfigurationProperties 注解使用
参考
@ConfigurationProperties 注解使用姿势，这一篇就够了
使用@ConfigurationProperties注解的要点
-
引入依赖spring-boot-configuration-processor
-
被注解的类是被注册到了Spring容器中的Bean。
方式一：@Component等组件注解和@ComponentScan组合，将组件注入Spring容器成为Bean。
方式二：@EnableConfigurationProperties({KeyWordConfig.class})注解。
-
被注解的属性有set方法。
-
使用@ConfigurationProperties注解和@Value注解
-
yml中键如果有特殊字符，可以使用引号括起来，如果有特殊字符注意转义。
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
@ConfigurationProperties注解实战
java代码配置springboot静态资源目录
参考mybatis-plus的crown项目
server:
port: 80
mozq:
# resource-map对应属性为resourceMap，连字符被去掉，连字符后面的首字母变大写了。
resource-map:
[/file/**]: "file:D:/00/00/"
[/img/**]: "file:D:/00/02/"
package com.mozq.boot.swagger01.properties;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import java.util.LinkedHashMap;
@Data
@ConfigurationProperties(prefix = MozqProperties.MOZQ_PREFIX)
public class MozqProperties {
public static final String MOZQ_PREFIX = "mozq";
private LinkedHashMap<String, String> resourceMap;
}
package com.mozq.boot.swagger01.config;
import com.mozq.boot.swagger01.properties.MozqProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import java.io.File;
@Configuration
@EnableConfigurationProperties({MozqProperties.class})
public class MozqConfig implements WebMvcConfigurer {
/*
这里注入了mozqProperties，但是不清楚原理，因为使用的是@EnableConfigurationProperties({MozqProperties.class})
MozqProperties对象并不是Spring中的bean。不能用注解直接注入。
*/
private MozqProperties mozqProperties;
public static final String USER_DIR = "user.dir";
public MozqConfig(MozqProperties mozqProperties){
this.mozqProperties = mozqProperties;
}
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
mozqProperties.getResourceMap().forEach((k,v)->{
// 因为直接使用"/file/**"会被过滤掉特殊字符，所以加上了中括号"[/file/**]"，使用的时候要去除掉。
String key = k.substring(1, k.length() - 1);
registry.addResourceHandler(key).addResourceLocations(v);
System.out.println(key + " " + v);
});
registry.addResourceHandler("/**").addResourceLocations("file:" + System.getProperty(USER_DIR) + File.separator);
System.out.println(System.getProperty(USER_DIR));
}
}
user.dir
package com.mozq.boot.swagger01.demo;
import com.mozq.boot.swagger01.config.MozqConfig;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
@RestController
public class DemoController {
/**
* springboot中"user.dir"属性得到的是jar包执行时，jar包所在的目录的磁盘路径，末尾不带文件分隔符。
* 如：jar包被放在"D:\Adobe"，则 System.getProperty("user.dir")得到的磁盘路径就是"D:\Adobe"
* @return
*/
@RequestMapping("/userDir")
public String userDir(){
String userDir = System.getProperty(MozqConfig.USER_DIR) + File.separator;
return userDir;
}
@RequestMapping("/realPath")
public String realPath(HttpServletRequest request){
String realPath = request.getServletContext().getRealPath("");
return realPath;
}
}
package com.mozq.freemarker.freemarker01.config;
import lombok.Data;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@ConfigurationProperties(prefix = "wechat")
@Data
public class KeyWordConfig {
@Value("keywordxxx")
private String keyword;//注入常量值：keywordxxx
@RequestMapping("/demo")
public String demo(){
System.out.println(keyword);
return keyword;
}
@Value("${xhpay.front}")
private String xhpay;
@RequestMapping("/demo2")
public String demo2(){
System.out.println(xhpay);
return xhpay;
}
@Value("${///}")
private String demo;
@RequestMapping("/demo3")
public String demo3(){
System.out.println(demo);
return demo;
}
@Value("${/account/tomcat:::\\\\}")
private String tomcat;
@RequestMapping("/demo4")
public String demo4(){
System.out.println(tomcat);
return tomcat;
}
}
"///": changzhou
"/account/delete": authc
"/account/tomcat:::\\\\": "<html>\"
<head><meta http-equiv='Content-Type' content='text/html; charset=UTF-8' /></head>
<body>
<p style='text-align:center;font-size: 48px;font-weight: bold;'>外卖前台联</p>
<p style='text-align:center;font-size: 48px;font-weight: bold;'>餐桌号：123</p>
<p style='Width:100%;text-align: left;font-weight: bold;'>支付时间：20191227143600320 </p>
<p style='Width:100%;text-align: left;font-weight: bold;'>支付状态：已支付</p>
</body>
</html>"
依赖和文件
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
##jwt配置
audience:
# 代表这个JWT的接收对象,存入audience
clientId: 098f6bcd4621d373cade4e832627b4f6
# 密钥, 经过Base64加密, 可自行替换
base64Secret: MDk4ZjZiY2Q0NjIxZDM3M2NhZGU0ZTgzMjYyN2I0ZjY=
# JWT的签发主体，存入issuer
name: restapiuser
# 过期时间，时间戳
expiresSecond: 172800
测试
package com.mozq.sb.jwt01.config;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.Date;
/**
* @description:
* @author: changzhou.xie@yuantiaokj.com
* @date: 2019/10/24 15:59
*/
@ConfigurationProperties("audience")
//@ConfigurationProperties(prefix = "audience", ignoreInvalidFields = true)
/*
@ConfigurationProperties 注解的bean必须先是spring中注册的bean。
如果不是则可以使用 @EnableConfigurationProperties(Audience.class) 来注册这个类。
或者使用@Component等组件将这个bean注册到spring中
@Import注解
*/
//@EnableConfigurationProperties(Audience.class)
@RestController
@Data
public class Audience {
String clientId;
String base64Secret;
String name;
String expiresSecond;
String password;//没有对应属性的则会是null。
/*
Failed to bind properties under 'audience' to com.mozq.sb.jwt01.config.Audience:
Property: audience.clientid
Value: 098f6bcd4621d373cade4e832627b4f6
Origin: class path resource [application.yml]:6:13
Reason: No setter found for property: client-id
*/
@RequestMapping("/clientId")
public String clientId(){
System.out.println(clientId);
System.out.println(base64Secret);
System.out.println(name);
System.out.println(expiresSecond);
return clientId;
/* 运行结果：
098f6bcd4621d373cade4e832627b4f6
MDk4ZjZiY2Q0NjIxZDM3M2NhZGU0ZTgzMjYyN2I0ZjY=
restapiuser
172800
*/
}
}
@ConfigurationProperties
public @interface ConfigurationProperties {
@AliasFor("prefix")
String value() default "";
/**
* The prefix of the properties that are valid to bind to this object. Synonym for
* {@link #value()}. A valid prefix is defined by one or more words separated with
* dots (e.g. {@code "acme.system.feature"}).
* @return the prefix of the properties to bind
*/
@AliasFor("value")
String prefix() default "";
/**
* Flag to indicate that when binding to this object invalid fields should be ignored.
* Invalid means invalid according to the binder that is used, and usually this means
* fields of the wrong type (or that cannot be coerced into the correct type).
* @return the flag value (default false)
* 是否忽略无效的字段，如果比如无法进行类型转换，则默认不忽略将报错。
*/
boolean ignoreInvalidFields() default false;
/**
* Flag to indicate that when binding to this object unknown fields should be ignored.
* An unknown field could be a sign of a mistake in the Properties.
* @return the flag value (default true)
*/
boolean ignoreUnknownFields() default true;
}
bugs
Failed to bind properties under 'audience.expires-second' to java.util.Date:
Property: audience.expiressecond
Value: 172800
Origin: class path resource [application.yml]:12:18
Reason: No converter found capable of converting from type [java.lang.Integer] to type [java.util.Date]