spring boot学习2之properties配置文件读取

时间：2025-02-13 17:11:19
=classpath:
=d:/logs


##tomcat set###
=80
#session 超时时间
-timeout=60
###########

hello=hello china!!!

=china school
=second grade three class
[0].name=tom
[1].name=jack
在代码中@Value注入到属性中 
@Controller
@RequestMapping("/")
public class HelloController {

	public static Logger LOG = ();
	
	@Value("${hello}")
	private String hello;
	
	@Value("${}")
	private String schoolName;

@ConfigurationProperties

 如果想把某种相关的配置，注入到某个配置类中，比如上面的中看到的配置项，想注入到ClassConfig配置类中 
package ;

import ;
import ;

import ;
import ;

@Component("classConfig")
@ConfigurationProperties(prefix="class")
public class ClassConfig {

	private String schoolName;
	
	private String className;
	
	private List<StudentConfig> students = new ArrayList<StudentConfig>();

	public String getSchoolName() {
		return schoolName;
	}

	public void setSchoolName(String schoolName) {
		 = schoolName;
	}

	public void setClassName(String className) {
		 = className;
	}

	public void setStudents(List<StudentConfig> students) {
		 = students;
	}

	public String getClassName() {
		return className;
	}

	public List<StudentConfig> getStudents() {
		return students;
	}
	
	
}
 这样就会把中以class.开头的配置项给注入进来
我们看到代码中@ConfigurationProperties并没有指明properties，那默认的就是。那是否有地方指明properties的路径呢？在版本1.5.1之前可以@ConfigurationProperties(prefix="class",location="classpath:/")，但是1.5.2版本没有location了，需要用@PropertySource("classpath:/") 
package ;

import ;
import ;
import ;

@Component("studentConfig")
@ConfigurationProperties
@PropertySource("classpath:/")
public class StudentConfig {

	private String name;
	

	public String getName() {
		return name;
	}
	
	public void setName(String name) {
		 = name;
	}
	
}

测试下 
package ;

import org.;
import org.;
import ;
import ;
import ;
import ;
import ;

import ;
import ;

@Controller
@RequestMapping("/")
public class HelloController {

	public static Logger LOG = ();
	
	@Value("${hello}")
	private String hello;
	
	@Value("${}")
	private String schoolName;
	
	@Autowired
	private ClassConfig classConfig;
	
	@Autowired
	private StudentConfig studentConfig;
	
	@RequestMapping(value="/hello")
	@ResponseBody
	public String hello(){
		("=======使用@Value注入获取.....===========");
		("hello="+hello+"   schoolName=" + schoolName);
		("======使用@ConfigurationProperties注入获取.....============");
		("schoolName=" + ());
		("className=" + ());
		("student[0].name=" + ().get(0).getName());
		
		("studentConfig...name=" + ());
		
		return "hello";
	}
}
打印结果 
2017-05-17 15:20:49.677  INFO 72996 --- [p-nio-80-exec-1]         : FrameworkServlet 'dispatcherServlet': initialization completed in 19 ms
2017-05-17 15:20:49.677 [http-nio-80-exec-1] INFO   - FrameworkServlet 'dispatcherServlet': initialization completed in 19 ms
=======使用@Value注入获取.....===========
hello=hello china!!!   schoolName=china school
======使用@ConfigurationProperties注入获取.....============
schoolName=china school
className=second grade three class
student[0].name=tom
studentConfig...name=xiao hong


 源码下载



相关文章