acme
上面讲到了yaml来配置属性，也提到了properties，所以这里便用properties来配置属性。
其实和上面没有什么太大的不同，代码再来添加一遍，和前面的代码大同小异。
首先pom.xml文件
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>cc.acme_me</groupId> <artifactId>springboot-yaml</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springboot-yaml</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
接着是程序入口：
package cc.acme_me.springbootyaml;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringbootYamlApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootYamlApplication.class, args);
}
} 再接着分别是三个Entity类User、Role和Card
package cc.acme_me.springbootyaml.entity;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
import java.util.*;
/**
* User entity
*
* @author acme
* @ConfigurationProperties 注解用于标识注释参数 prefix标识对应的前缀
* @Component 标识注入Spring容器中(只有注入Spring容器才能使用)
*/
@ConfigurationProperties(prefix = "user")
@Component
public class User {
private Integer id;
private String userName;
private String password;
private Date registerDate;
private Integer privilegeLevel;
private Role role;
private List<String> hobbies = new ArrayList<>();
private Map<Integer, Card> card = new HashMap<>();
/**
* 重新toString方法方便查看内容
*/
@Override
public String toString() {
return "User{" +
"id=" + id +
", userName='" + userName + '\'' +
", password='" + password + '\'' +
", registerDate=" + registerDate +
", privilegeLevel=" + privilegeLevel +
", role=" + role +
", hobbies=" + hobbies +
", card=" + card +
'}';
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
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 Date getRegisterDate() {
return registerDate;
}
public void setRegisterDate(Date registerDate) {
this.registerDate = registerDate;
}
public Integer getPrivilegeLevel() {
return privilegeLevel;
}
public void setPrivilegeLevel(Integer privilegeLevel) {
this.privilegeLevel = privilegeLevel;
}
public Role getRole() {
return role;
}
public void setRole(Role role) {
this.role = role;
}
public List<String> getHobbies() {
return hobbies;
}
public void setHobbies(List<String> hobbies) {
this.hobbies = hobbies;
}
public Map<Integer, Card> getCard() {
return card;
}
public void setCard(Map<Integer, Card> card) {
this.card = card;
}
}package cc.acme_me.springbootyaml.entity;
/**
* 权限
*
* @author acme
*/
public class Role {
private Integer id;
private String level;
/**
* 重新toString方法方便查看内容
*/
@Override
public String toString() {
return "Role{" +
"id=" + id +
", level='" + level + '\'' +
'}';
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getLevel() {
return level;
}
public void setLevel(String level) {
this.level = level;
}
}package cc.acme_me.springbootyaml.entity;
import java.util.Date;
/**
* 银行卡
*
* @author acme
*/
public class Card {
private Integer id;
private String cardNumber;
private String cvv;
private Date startDate;
private Date endDate;
/**
* 重新toString方法方便查看内容
*/
@Override
public String toString() {
return "Card{" +
"id=" + id +
", cardNumber='" + cardNumber + '\'' +
", cvv='" + cvv + '\'' +
", startDate=" + startDate +
", endDate=" + endDate +
'}';
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getCardNumber() {
return cardNumber;
}
public void setCardNumber(String cardNumber) {
this.cardNumber = cardNumber;
}
public String getCvv() {
return cvv;
}
public void setCvv(String cvv) {
this.cvv = cvv;
}
public Date getStartDate() {
return startDate;
}
public void setStartDate(Date startDate) {
this.startDate = startDate;
}
public Date getEndDate() {
return endDate;
}
public void setEndDate(Date endDate) {
this.endDate = endDate;
}
} 还有就是properties文件的配置了
server.port=8080 ################User################ user.id=1 user.user-name=admin user.password=321 user.register_date=2023//03//03 user.privilegeLevel=15 user.role.id=2 user.role.level=Administrators user.hobbies=\u5531,\u8DF3,RAP,\u7BEE\u7403 ################分隔符 好看点################ user.card.1.id=1 user.card.1.cardNumber=123 user.card.1.cvv=321 user.card.1.startDate=2000//01//01 user.card.1.endDate=2010//01//01 ################分隔符 好看点################ user.card.2.id=2 user.card.2.cardNumber=456 user.card.2.cvv=654 user.card.2.startDate=2010//01//01 user.card.2.endDate=2020//01//01
这里有两点需要注意的：
一、是关于properties文件的编码问题，可以看到，我在user.hobbies参数后面都是\u开始，这个是什么意思呢？\u开头表示这一个Unicode编码的字符，为了解决中文乱码问题，可以在IDE工具里面去设置工具来解决，但是相比之下我更推荐我上面这种方式。如果去改IDE的编码，换了一个环境，换了一个编码，就要再去改一遍。当然，使用Unicode编码字符串也是有坏处的，就比如上面这一段，直接看并不知道这里面的内容是啥，是不是中文都不一定。
这里这个小问题一笔带过，properties中文要记得注意编码问题！
二、例如我entity中的User类，用户名是userName为什么这里配置的是user-name？还有register_date？一个变成了短杠，一个用下划线隔开？这个其实是针对驼峰标识的单词，可以使用这两种方式。比如我下面的cardNum就还是使用的驼峰标识，原来的属性名。
最后上测试类和测试结果：
package cc.acme_me.springbootyaml;
import cc.acme_me.springbootyaml.entity.User;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
/**
* Spring Boot单元测试
*
* @author acme
*/
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringbootYamlApplicationTests {
@Autowired
private User user;
@Test
public void contextLoads() {
System.out.println(user);
}
}测试结果表示，配置正常。