SpringBoot的读取properties文件的方式

转载：https://www.imooc.com/article/18252
一、@ConfigurationProperties方式
自定义配置类：PropertiesConfig.java

package com.zyd.property.config;

import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.boot.context.properties.ConfigurationProperties;
//import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

/**
 * 对应上方配置文件中的第一段配置
 * @author <a href="mailto:yadong.zhang0415@gmail.com">yadong.zhang</a>
 * @date 2017年6月1日 下午4:34:18 
 * @version V1.0
 * @since JDK ： 1.7
 */
@Component
@ConfigurationProperties(prefix = "com.zyd")
// PropertySource默认取application.properties
// @PropertySource(value = "config.properties")
public class PropertiesConfig {

    public String type3;
    public String title3;
    public Map<String, String> login = new HashMap<String, String>();
    public List<String> urls = new ArrayList<>();

    public String getType3() {
        return type3;
    }

    public void setType3(String type3) {
        this.type3 = type3;
    }

    public String getTitle3() {
        try {
            return new String(title3.getBytes("ISO-8859-1"), "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return title3;
    }

    public void setTitle3(String title3) {
        this.title3 = title3;
    }

    public Map<String, String> getLogin() {
        return login;
    }

    public void setLogin(Map<String, String> login) {
        this.login = login;
    }

    public List<String> getUrls() {
        return urls;
    }

    public void setUrls(List<String> urls) {
        this.urls = urls;
    }

} 
程序启动类：Applaction.java

package com.zyd.property;

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

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.zyd.property.config.PropertiesConfig;

/**
 * @author <a href="mailto:yadong.zhang0415@gmail.com">yadong.zhang</a>
 * @date 2017年6月1日 下午3:49:30 
 * @version V1.0
 * @since JDK ： 1.7
 */
@SpringBootApplication
@RestController
public class Applaction {

    @Autowired
    private PropertiesConfig propertiesConfig;

    /**
     * 
     * 第一种方式：使用`@ConfigurationProperties`注解将配置文件属性注入到配置对象类中
     * 
     * @author zyd
     * @throws UnsupportedEncodingException
     * @since JDK 1.7
     */
    @RequestMapping("/config")
    public Map<String, Object> configurationProperties() {
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("type", propertiesConfig.getType3());
        map.put("title", propertiesConfig.getTitle3());
        map.put("login", propertiesConfig.getLogin());
        map.put("urls", propertiesConfig.getUrls());
        return map;
    }

    public static void main(String[] args) throws Exception {
        SpringApplication application = new SpringApplication(Applaction.class);
        application.run(args);
    }
}
访问结果：

{"title":"使用@ConfigurationProperties获取配置文件","urls":["http://ztool.cc","http://ztool.cc/format/js","http://ztool.cc/str2image","http://ztool.cc/json2Entity","http://ztool.cc/ua"],"login":{"username":"zhangdeshuai","callback":"http://www.flyat.cc","password":"zhenshuai"},"type":"Springboot - @ConfigurationProperties"}
二、使用@Value注解方式
程序启动类：Applaction.java

package com.zyd.property;

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

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author <a href="mailto:yadong.zhang0415@gmail.com">yadong.zhang</a>
 * @date 2017年6月1日 下午3:49:30 
 * @version V1.0
 * @since JDK ： 1.7
 */
@SpringBootApplication
@RestController
public class Applaction {

    @Value("${com.zyd.type}")
    private String type;

    @Value("${com.zyd.title}")
    private String title;

    /**
     * 
     * 第二种方式：使用`@Value("${propertyName}")`注解
     * 
     * @author zyd
     * @throws UnsupportedEncodingException
     * @since JDK 1.7
     */
    @RequestMapping("/value")
    public Map<String, Object> value() throws UnsupportedEncodingException {
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("type", type);
        // *.properties文件中的中文默认以ISO-8859-1方式编码，因此需要对中文内容进行重新编码
        map.put("title", new String(title.getBytes("ISO-8859-1"), "UTF-8"));
        return map;
    }

    public static void main(String[] args) throws Exception {
        SpringApplication application = new SpringApplication(Applaction.class);
        application.run(args);
    }
}
访问结果：

{"title":"使用@Value获取配置文件","type":"Springboot - @Value"}