在src/main/resources下添加配置文件application.properties
例如修改端口号
#端口号 server.port=8089
分环境配置
在src/main/resources下添加,application-pro.properties,application-dev.properties和application.properties三个文件
application.properties
spring.profiles.active=dev
application-pro.properties
#端口号 server.port=80 #自定义端口号读取 my.name=pzr.dev
application-dev.properties
#端口号 server.port=8089 #自定义端口号读取 my.name=pzr.pro
当application.propertie设置spring.profiles.active=dev时,则说明是指定使用application-dev.properties文件进行配置
1、@PropertySource配置文件路径设置,在类上添加注解,如果在默认路径下可以不添加该注解。
需要用@PropertySource的有:
多配置文件引用,若取两个配置文件中有相同属性名的值,则取值为最后一个配置文件中的值
在application.properties中的文件,直接使用@Value读取即可,applicarion的读取优先级最高
@PropertySource({"classpath:config/my.properties","classpath:config/config.properties"}) public class TestController
2、@Value属性名,在属性名上添加该注解
@Value("${my.name}") private String myName;
示例1:使用@Value读取application.properties里的配置内容
配置文件application.properties
spring.application.name=springbootdemo server.port=8080 mail.username=application-duan mail.password=application-duan123456
启动类
package com.dxz.property5; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; @SpringBootApplication public class TestProperty5 { public static void main(String[] args) { //SpringApplication.run(TestProperty1.class, args); new SpringApplicationBuilder(TestProperty5.class).web(true).run(args); } }
测试类:
package com.dxz.property5; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.PropertySource; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController @RequestMapping("/task") //@PropertySource("classpath:mail.properties") public class TaskController { @Value("${mail.username}") private String userName; @Value("${mail.password}") private String password; @RequestMapping(value = { "/", "" }) public String hellTask() { System.out.println("userName:" + userName); System.out.println("password:" + password); return "hello task !!"; } }
结果:
userName:application-duan password:application-duan123456
示例2:使用@Value+@PropertySource读取其它配置文件(多个)内容
读取mail.properties配置
package com.dxz.property5; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.PropertySource; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController @RequestMapping("/task") @PropertySource("classpath:mail.properties") public class TaskController { @Value("${mail.smtp.auth}") private String userName; @Value("${mail.from}") private String password; @RequestMapping(value = { "/", "" }) public String hellTask() { System.out.println("userName:" + userName); System.out.println("password:" + password); return "hello task !!"; } }
结果:
userName:false password:me@localhost
测试类
package com.dxz.property6; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.PropertySource; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.bind.annotation.RestController; @RestController @RequestMapping("/task") @PropertySource({ "classpath:mail.properties", "classpath:db.properties" }) public class TaskController { // 在application.properties中的文件,直接使用@Value读取即可,applicarion的读取优先级最高 @Value("${mail.username}") private String myName; // 如果多个文件有重复的名称的属性话,最后一个文件中的属性生效 @Value("${mail.port}") private String port; @Value("${db.username}") private String dbUserName; @Autowired ObjectProperties objectProperties; @RequestMapping("/test") @ResponseBody String test() { String result = "myName:" + myName + "\n port:" + port + "\n dbUserName:" + dbUserName + "\n objectProperties:" + objectProperties; System.out.println("result:=" + result); return result; } }
启动类
package com.dxz.property6; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; @SpringBootApplication public class TestProperty6 { public static void main(String[] args) { //SpringApplication.run(TestProperty1.class, args); new SpringApplicationBuilder(TestProperty6.class).web(true).run(args); } }
ObjectProperties.java
package com.dxz.property6; import java.util.ArrayList; import java.util.List; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component; /** * 配置文件映射对象 * @author DELL */ @Component @PropertySource("classpath:config/object.properties") @ConfigurationProperties(prefix = "obj") public class ObjectProperties { private String name; private String age; // 集合必须初始化,如果找不到就是空集合,会报错 private ListclassName = new ArrayList (); public List getClassName() { return className; } public void setClassName(List className) { this.className = className; } 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; } @Override public String toString() { return "ObjectProperties [name=" + name + ", age=" + age + ", className=" + className + "]"; } }
object.properties
#自定义属性读取 obj.name=obj.name obj.age=obj.age obj.className[0]=obj.className[0] obj.className[1]=obj.className[1]
db.properties
db.username=admin db.password=xxxxx mail.port=xxxx
结果:http://localhost:8080/task/test/
result:=myName:application-duan port:2555 dbUserName:admin objectProperties:ObjectProperties [name=obj.name, age=obj.age, className=[obj.className[0], obj.className[1]]]