spring boot的基本配置——spring boot的全局配置文件——读取应用配置——@ConfigurationProperties注解

package com.test.controller.model;
 
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
 
 
@Component//使用Component注解，声明一个组件，被控制器依赖注入
@ConfigurationProperties(prefix = "obj")//obj为配置文件中key的前缀
public class StudentProperties
{
    private String ssname;
    private int ssage;
 
    public String getSname()
    {
        return ssname;
    }
 
    public void setSname(String sname)
    {
        this.ssname = sname;
    }
 
    public int getSage()
    {
        return ssage;
    }
 
    public void setSage(int sage)
    {
        this.ssage = sage;
    }
 
    @Override
    public String toString() {
        return "StudentProperties [ssname=" + ssname + ", ssage=" + ssage + "]";
    }
}

package com.test.controller;
 
import com.test.controller.model.StudentProperties;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
 
@Controller
public class StartMainController
{
    @Autowired
    StudentProperties studentProperties;
 
 
 
    @Autowired
    private Environment ev;
 
    @Value("key_test_001")
    private  String as;
 
    @RequestMapping("/12")
    @ResponseBody
    public String home12()
    {
        return "hello---12";
    }
 
 
    @RequestMapping("/123")
    @ResponseBody
    public String home123()
    {
        return "hello---123";
    }
 
    @RequestMapping("/1234")
    @ResponseBody
    public String home1234()
    {
        return ev.getProperty("key_test");
    }
 
    @RequestMapping("/12345")
    @ResponseBody
    public String home12345()
    {
        return as;
    }
 
    @RequestMapping("/123456")
    @ResponseBody
    public String home123456()
    {
        return studentProperties.toString();
    }
 
 
}