自定义test.properties文件

my.name = leif
my.age = 24

方法一

使用@value注解

package com.fas.demo.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/my")
@PropertySource("classpath:test.properties")
public class MyController {
    @Value("${my.name}")
    private String name;
    @Value("${my.age}")
    private int age;

    @GetMapping("/test")
    @ResponseBody
    public String test() {
        return name + " - " + age;
    }
}

方法二

使用Environment类

package com.fas.demo.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/my")
@PropertySource("classpath:test.properties")
public class MyController {
    @Autowired
    private Environment environment;

    @GetMapping("/test")
    @ResponseBody
    public String test() {
        return environment.getProperty("my.name") + " - " + environment.getProperty("my.age");
    }
}

方法三

使用@ConfigurationProperties注解

package com.fas.demo.configuration;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

@Configuration
@ConfigurationProperties(prefix = "my")
@PropertySource("classpath:test.properties")
public class MyPropertiesConfiguration {
    private String name;
    private int age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

package com.fas.demo.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.fas.demo.configuration.MyPropertiesConfiguration;

@Controller
@RequestMapping("/my")
public class MyController {
    @Autowired
    private MyPropertiesConfiguration myPropertiesConfiguration;

    @GetMapping("/test")
    @ResponseBody
    public String test() {
        return myPropertiesConfiguration.getName() + " - " + myPropertiesConfiguration.getAge();
    }
}

方法四

使用注册监听器

package com.fas.demo.configuration;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import org.springframework.core.io.support.PropertiesLoaderUtils;

public class MyPropertiesConfiguration {
    public static Map<String, String> propertiesMap = new HashMap<String, String>();

    private static void processProperties(Properties properties) {
        for (Object key : properties.keySet()) {
            String keyString = key.toString();

            try {
                propertiesMap.put(keyString, new String(properties.getProperty(keyString).getBytes("ISO-8859-1"), "utf-8"));
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        }
    }

    public static void loadAllProperties(String propertyFileName) {
        try {
            Properties properties = PropertiesLoaderUtils.loadAllProperties(propertyFileName);
            processProperties(properties);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static String getProperty(String name) {
        return propertiesMap.get(name);
    }

    public static Map<String, String> getAllProperty() {
        return propertiesMap;
    }
}

package com.fas.demo.listener;

import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;

import com.fas.demo.configuration.MyPropertiesConfiguration;

public class MyPropertiesListener implements ApplicationListener<ApplicationEvent> {
    private String propertyFileName;

    public MyPropertiesListener(String propertyFileName) {
        this.propertyFileName = propertyFileName;
    }

    @Override
    public void onApplicationEvent(ApplicationEvent event) {
        MyPropertiesConfiguration.loadAllProperties(propertyFileName);
    }
}

package com.fas.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import com.fas.demo.listener.MyPropertiesListener;

@SpringBootApplication
public class DemoApplication {
    public static void main(String[] args) {
        SpringApplication springApplication = new SpringApplication(DemoApplication.class);
        springApplication.addListeners(new MyPropertiesListener("test.properties"));
        springApplication.run(args);
    }
}

package com.fas.demo.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.fas.demo.configuration.MyPropertiesConfiguration;

@Controller
@RequestMapping("/my")
public class MyController {
    @GetMapping("/test")
    @ResponseBody
    public String test() {
        return MyPropertiesConfiguration.getProperty("my.name") + " - " + MyPropertiesConfiguration.getProperty("my.age");
    }
}