首先声明一点,springboot获取资源文件,需要看是
1》从spring boot默认的application.properties资源文件中获取
2》还是从自定义的资源文件中获取
带着这个想法去看下面几种方式
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1》从spring boot默认的application.properties资源文件中获取
先给出来application.properties的内容
#方式1
com.sxd.type1 = type1
com.sxd.title1 = 使用@ConfigurationProperties获取配置文件
#方式2
com.sxd.type2 = type2
com.sxd.title2 = 使用@Value获取配置文件
#方式3
com.sxd.type3 = type3
com.sxd.title3 = 使用Environment获取资源文件
#map
com.sxd.login[username] = sxd
com.sxd.login[password] = admin123
com.sxd.login[callback] =
#list
com.sxd.comList[0] = com1
com.sxd.comList[1] = com2
com.sxd.comList[2] = com3
View Code
①===第一种方式:使用@ConfigurationProperties获取配置文件
先搞一个绑定资源文件的bean
注意属性名和资源文件中的属性名相一致。
package com.sxd.beans;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@Component
@ConfigurationProperties(prefix = "com.sxd")
//@PropertySource("classpath:/application.properties")
//不用这个注解,默认就是加载application.properties资源文件
public class User {
private String type1;
private String title1;
private Map<String,String> login = new HashMap<>();
private List<String> comList = new ArrayList<>();
public String getType1() {
return type1;
}
public void setType1(String type1) {
this.type1 = type1;
}
public String getTitle1() {
return title1;
}
public void setTitle1(String title1) {
this.title1 = title1;
}
public Map<String, String> getLogin() {
return login;
}
public void setLogin(Map<String, String> login) {
this.login = login;
}
public List<String> getComList() {
return comList;
}
public void setComList(List<String> comList) {
this.comList = comList;
}
}
View Code
然后在启动类中使用
package com.sxd.secondemo;
import com.sxd.beans.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@SpringBootApplication
@EnableConfigurationProperties(User.class)
public class SecondemoApplication {
@Autowired
User user;
@RequestMapping("/")
public String hello(){
user.getLogin().forEach((k,v)->{
System.out.println("map的键:"+k+">>map的值:"+v);
});
user.getComList().forEach(i->{
System.out.println("list的值:"+i);
});
return user.getType1()+user.getTitle1();
}
public static void main(String[] args) {
SpringApplication.run(SecondemoApplication.class, args);
}
}
View Code
结果如下:
控制台打印:
访问地址:
②===第二种方式:使用@Value获取配置文件
这里不用搞一个绑定资源文件的bean了。
只需要在你想用的地方使用@Value调用你想要的属性名对应的值即可。
package com.sxd.secondemo;
import com.sxd.beans.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@SpringBootApplication
public class SecondemoApplication {
@Value("${com.sxd.type2}")
private String type;
@Value("${com.sxd.title2}")
private String title;
@RequestMapping("/")
public String hello(){
return type+title;
}
public static void main(String[] args) {
SpringApplication.run(SecondemoApplication.class, args);
}
}
View Code
访问结果:
③===第三种方式:使用Environment获取资源文件
也不用提前做什么使用,Environment就是一个全局的资源池,application.properties中的属性值都可以从这里获取到。
package com.sxd.secondemo;
import com.sxd.beans.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.core.env.Environment;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@SpringBootApplication
public class SecondemoApplication {
@Autowired
Environment environment;
@RequestMapping("/")
public String hello(){
return environment.getProperty("com.sxd.type3")+environment.getProperty("com.sxd.title3");
}
public static void main(String[] args) {
SpringApplication.run(SecondemoApplication.class, args);
}
}
View Code
运行结果:
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2》从自定义的资源文件中获取属性值
①===第一种方式:使用@ConfigurationProperties获取配置文件
自定义资源文件如下:
然后指定绑定自定义资源文件
package com.sxd.beans;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;
@Component
@ConfigurationProperties(prefix = "com.sxd")
@PropertySource("classpath:/test.properties")
//需要用这个注解,默认就是加载application.properties资源文件,替换@ConfigurationProperties取消location属性的效果
public class User {
private String type1;
private String title1;
public String getType1() {
return type1;
}
public void setType1(String type1) {
this.type1 = type1;
}
public String getTitle1() {
return title1;
}
public void setTitle1(String title1) {
this.title1 = title1;
}
}
View Code
最后在启动类中使用一下
package com.sxd.secondemo;
import com.sxd.beans.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.core.env.Environment;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@SpringBootApplication
@EnableConfigurationProperties(User.class)
public class SecondemoApplication {
@Autowired
User user;
@RequestMapping("/")
public String hello(){
return user.getType1()+user.getTitle1();
}
public static void main(String[] args) {
SpringApplication.run(SecondemoApplication.class, args);
}
}
View Code
运行结果:
②===第二种方式:使用@Value获取配置文件
先设定一个自定义资源文件
如下,自定义资源文件需要满足application-{profile}.properties格式
然后在application.properties文件中指明加载这个资源文件
spring.profiles.active=test
#spring.profiles.include=test
这两种哪种都可以加载上自定义的资源文件,后面的test就是上面{profile}的值
最后在启动类中使用@Value获取自定义资源文件中的属性,这个时候自定义的资源文件已经在application,properties文件中被指明要被加载了,因此是可以被获取到的
package com.sxd.secondemo;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@SpringBootApplication
public class SecondemoApplication {
@Value("${com.sxd.type2}")
private String type;
@Value("${com.sxd.title2}")
private String title;
@RequestMapping("/")
public String hello(){
return type+title;
}
public static void main(String[] args) {
SpringApplication.run(SecondemoApplication.class, args);
}
}
View Code
运行结果:
③===第三种方式:使用Environment获取资源文件
首先还是写一个自定义的资源文件,文件命名同上面第二种方式一样
接着,在application.properties中声明加载这个自定义的资源文件
最后在启动类中,也就是哪里使用就在那里自动注入Environment.
package com.sxd.secondemo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.core.env.Environment;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@SpringBootApplication
public class SecondemoApplication {
@Autowired
Environment environment;
@RequestMapping("/")
public String hello(){
return environment.getProperty("com.sxd.type3")+environment.getProperty("com.sxd.title3");
}
public static void main(String[] args) {
SpringApplication.run(SecondemoApplication.class, args);
}
}
View Code
运行结果:
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