Spring Boot支持在系统加载的时候配置随机数。
添加config/random.properties文件,添加以下内容:
#随机32位MD5字符串 user.random.secret=${random.value} #随机int数字 user.random.intNumber=${random.int} #随机long数字 user.random.longNumber=${random.long} #随便uuid user.random.uuid=${random.uuid} #随机10以内的数字 user.random.lessTen=${random.int(10)} #随机1024~65536之内的数字 user.random.range=${random.int[1024,65536]}
添加绑定类:
import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component; @Component @ConfigurationProperties(prefix = "user.random") @PropertySource(value = { "config/random.properties" }) public class RandomConfig { private String secret; private int intNumber; private int lessTen; private int range; private long longNumber; private String uuid; public String getSecret() { return secret; } public void setSecret(String secret) { this.secret = secret; } public int getIntNumber() { return intNumber; } public void setIntNumber(int intNumber) { this.intNumber = intNumber; } public int getLessTen() { return lessTen; } public void setLessTen(int lessTen) { this.lessTen = lessTen; } public int getRange() { return range; } public void setRange(int range) { this.range = range; } public long getLongNumber() { return longNumber; } public void setLongNumber(long longNumber) { this.longNumber = longNumber; } public String getUuid() { return uuid; } public void setUuid(String uuid) { this.uuid = uuid; } }
输出如下:
secret=83a5c3402ef936a37842dc6de3d1af0f intNumber=1816149855 lessTen=1 range=37625 longNumber=8449008776720010146 uuid=e5bc2091-1599-45b1-abd7-e3721ac77e6b
具体的生成细节可以参考Spring Boot的配置类:
org.springframework.boot.context.config.RandomValuePropertySource