applicationi.properties
application.yml 以数据为中心，比json xml更适合做配置文件
k: v 表示一对键值对 空格缩进控制层级关系，左对齐的一列数据都是同一层级
字面量：123 aaa字符串默认不用引号 true
""不转义，所以特殊字符比如换行生效
''转义，所以特殊字符当成普通字符无效
对象，map属性值
对象还是k: v
在下一行写
friends:
lastname: zhangsan
age: 20
行内写法：
friends: {lastname: zhangsan,age: 18}
数组List、Set， pets: - cat - dog - pig 行内写法： pets: [cat,dog,pig]
干活：
创建bean目录写一个person类，一个dog类
@ConfigurationProperties将配置文件中配置的每一个属性的值，映射到这个组件中
package com.tabctrlshift.springboot.bean;
import org.springframework.boot.context.properties.ConfigurationProperties;
import java.util.Date;
import java.util.List;
import java.util.Map;
/**
* @ConfigurationProperties将配置文件中配置的每一个属性的值，映射到这个组件中
* prefix = "person"配置文件中这个下面的所有属性进行一一映射
*/
//类中所有属性和配置文件中相关的配置进行绑定
@ConfigurationProperties(prefix = "person")
public class Person {
private String lastName;
private Integer age;
private boolean boos;
private Date birth;
private Map<String,Object> maps;
private List<Object> lists;
private Dog dog;
@Override
public String toString() {
return "Person{" +
"lastName='" + lastName + '\'' +
", age=" + age +
", boos=" + boos +
", birth=" + birth +
", maps=" + maps +
", lists=" + lists +
", dog=" + dog +
'}';
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public boolean isBoos() {
return boos;
}
public void setBoos(boolean boos) {
this.boos = boos;
}
public Date getBirth() {
return birth;
}
public void setBirth(Date birth) {
this.birth = birth;
}
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 Dog getDog() {
return dog;
}
public void setDog(Dog dog) {
this.dog = dog;
}
}
package com.tabctrlshift.springboot.bean;
public class Dog {
private String name;
private String age;
@Override
public String toString() {
return "Dog{" +
"name='" + name + '\'' +
", age='" + age + '\'' +
'}';
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
}
application.yml写入配置
server:
port: 8081
person:
lastName: zhangsan
age: 18
boss: false
birth: 2017/12/12
maps: {k1: v1,k2: 12}
lists:
- list
- zhaoliu
dog:
name: 小狗
age: 2
错误提示：
添加相关的依赖就有元数据提示了
<!--导入配置文件处理器，配置文件绑定就会有输入提示--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency>
配置好了重新启动main
@Component 添加到容器中
下面开始测试
package com.tabctrlshift.springboot;
import com.tabctrlshift.springboot.bean.Person;
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
*
* 可以在测试期间类似编码一样进行自动注入等容器的功能
*/
//用spring的驱动器来跑，而不是junit
@RunWith(SpringRunner.class)
//springboot的单元测试
@SpringBootTest
public class SpringBoot02ConfigApplicationTests {
@Autowired
Person person;
@Test
// 在这运行
public void contextLoads() {
// 简写so就可以联想出来
System.out.println(person);
}
}
运行测试，控制台打印出来ok
Person{lastName='zhangsan', age=18, boos=false, birth=Tue Dec 12 00:00:00 CST 2017, maps={k1=v1, k2=12}, lists=[list, zhaoliu], dog=Dog{name='小狗', age='2'}}
配置文件、javabean，导入配置文件处理器这样编写配置就有提示了
@ConfigurationProperties
同样如果用.properties文件也会有提示
有中文 文件编码也要改一下
#server.port=8081 #配置文件默认utf-8 person.age=18 person.birth=2017/12/12 person.boos=false person.last-name=张三 person.lists=a,b,c person.maps.k1=v1 person.maps.k2=v2 person.maps.k3=v3 person.dog.name=dog person.dog.age=15
上面是application.properties代码例子