SpringBoot系列之配置文件占位符使用

SpringBoot系列之配置文件占位符使用

Springboot占位符支持的有随机数和配置的值等等，本博客主要介绍的是随机数和获取属性配置值的简单用法

• 随机数获取

支持的写法有：

${random.value}、${random.int}、${random.long}、${random.uuid}
${random.int(10)}、${random.int(1024,65536)} .etc

• 获取属性配置的值

user.userName= root(${user.address.tel})
user.address.tel= 15899988899

ok，写个例子实践一下

user.properties

user.userName= root(${user.address.tel})
user.isAdmin= true
user.regTime= 2019/11/01
user.isOnline= 1
user.maps.k1=${random.int}
user.maps.k2=v2
user.lists=${random.uuid},${random.value}
user.address.tel= 15899988899
user.address.name=上海浦东区

User类

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

import java.util.Date;
import java.util.List;
import java.util.Map;

@Component//将组件添加到Spring容器
@PropertySource(value = "classpath:user.properties",encoding = "utf-8")
@ConfigurationProperties(prefix = "user")//属性进行映射
public class User {

private String userName;
private boolean isAdmin;
private Date regTime;
private Long isOnline;
private Map<String,Object> maps;
private List<Object> lists;
private Address address;

@Override
public String toString() {
return "User{" +
"userName='" + userName + '\'' +
", isAdmin=" + isAdmin +
", regTime=" + regTime +
", isOnline=" + isOnline +
", maps=" + maps +
", lists=" + lists +
", address=" + address +
'}';
}

public String getUserName() {
return userName;
}

public void setUserName(String userName) {
this.userName = userName;
}

public boolean isAdmin() {
return isAdmin;
}

public void setAdmin(boolean admin) {
isAdmin = admin;
}

public Date getRegTime() {
return regTime;
}

public void setRegTime(Date regTime) {
this.regTime = regTime;
}

public Long getIsOnline() {
return isOnline;
}

public void setIsOnline(Long isOnline) {
this.isOnline = isOnline;
}

public Map<String, Object> getMaps() {
return maps;
}

public void setMaps(Map<String, Object> maps) {
this.maps = maps;
}

public List<Object> getLists() {
return lists;
}

public void setLists(List<Object> lists) {
this.lists = lists;
}

public Address getAddress() {
return address;
}

public void setAddress(Address address) {
this.address = address;
}
}

Address类：：

package com.example.springboot.properties.bean;

/**
* <pre>
*
* </pre>
*
* @author nicky
* <pre>
* 修改记录
* 修改后版本: 修改人： 修改日期: 2019年11月03日 修改内容:
* </pre>
*/
public class Address {
private String tel;
private String name;

@Override
public String toString() {
return "Address{" +
"tel='" + tel + '\'' +
", name='" + name + '\'' +
'}';
}

public String getTel() {
return tel;
}

public void setTel(String tel) {
this.tel = tel;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}
}

写个junit测试类获取

package com.example.springboot.properties;

import com.example.springboot.properties.bean.User;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ApplicationContext;

@SpringBootTest
class SpringbootPropertiesConfigApplicationTests {

@Autowired
User user;

@Test
public void testConfigurationProperties(){
System.out.println(user);
}

}User{userName='root(15899988899)', isAdmin=false, regTime=Fri Nov 01 00:00:00 CST 2019, isOnline=1, maps={k2=v2, k1=366784341}, lists=[2c9f4a24-23d9-4507-b446-f8e92c82608f, 0c61b1f7321714f374ba16f88c1bb587], address=Address{tel='15899988899', name='上海浦东区'}}