软件编程
位置:首页>> 软件编程>> java编程>> SpringBoot四种读取properties文件的方式(小结)

SpringBoot四种读取properties文件的方式(小结)

作者:猿敲月下码  发布时间:2023-10-10 03:25:14 

标签:Spring,Boot,读取,properties

前言

在项目开发中经常会用到配置文件,配置文件的存在解决了很大一份重复的工作。今天就分享四种在Springboot中获取配置文件的方式。

注:前三种测试配置文件为springboot默认的application.properties文件


#######################方式一#########################
com.zyd.type3=Springboot - @ConfigurationProperties
com.zyd.title3=使用@ConfigurationProperties获取配置文件
#map
com.zyd.login[username]=zhangdeshuai
com.zyd.login[password]=zhenshuai
com.zyd.login[callback]=http://www.flyat.cc
#list
com.zyd.urls[0]=http://ztool.cc
com.zyd.urls[1]=http://ztool.cc/format/js
com.zyd.urls[2]=http://ztool.cc/str2image
com.zyd.urls[3]=http://ztool.cc/json2Entity
com.zyd.urls[4]=http://ztool.cc/ua

#######################方式二#########################
com.zyd.type=Springboot - @Value
com.zyd.title=使用@Value获取配置文件

#######################方式三#########################
com.zyd.type2=Springboot - Environment
com.zyd.title2=使用Environment获取配置文件

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" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >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" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >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


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" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >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"}

三、使用Environment

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.core.env.Environment;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
* @author <a href="mailto:yadong.zhang0415@gmail.com" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >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 Environment env;

/**
  *
  * 第三种方式:使用`Environment`
  *
  * @author zyd
  * @throws UnsupportedEncodingException
  * @since JDK 1.7
  */
 @RequestMapping("/env")
 public Map<String, Object> env() throws UnsupportedEncodingException {
   Map<String, Object> map = new HashMap<String, Object>();
   map.put("type", env.getProperty("com.zyd.type2"));
   map.put("title", new String(env.getProperty("com.zyd.title2").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Environment获取配置文件","type":"Springboot - Environment"}

四、使用PropertiesLoaderUtils

app-config.properties


#### 通过注册 * (`Listeners`) + `PropertiesLoaderUtils`的方式
com.zyd.type=Springboot - Listeners
com.zyd.title=使用Listeners + PropertiesLoaderUtils获取配置文件
com.zyd.name=zyd
com.zyd.address=Beijing
com.zyd.company=in

PropertiesListener.java 用来初始化加载配置文件


package com.zyd.property.listener;

import org.springframework.boot.context.event.ApplicationStartedEvent;
import org.springframework.context.ApplicationListener;

import com.zyd.property.config.PropertiesListenerConfig;

/**
* 配置文件 * ,用来加载自定义配置文件
*
* @author <a href="mailto:yadong.zhang0415@gmail.com" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >yadong.zhang</a>
* @date 2017年6月1日 下午3:38:25
* @version V1.0
* @since JDK : 1.7
*/
public class PropertiesListener implements ApplicationListener<ApplicationStartedEvent> {

private String propertyFileName;

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

@Override
 public void onApplicationEvent(ApplicationStartedEvent event) {
   PropertiesListenerConfig.loadAllProperties(propertyFileName);
 }
}

PropertiesListenerConfig.java 加载配置文件内容


package com.zyd.property.config;

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

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

/**
* 第四种方式:PropertiesLoaderUtils
*
* @author <a href="mailto:yadong.zhang0415@gmail.com" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >yadong.zhang</a>
* @date 2017年6月1日 下午3:32:37
* @version V1.0
* @since JDK : 1.7
*/
public class PropertiesListenerConfig {
 public static Map<String, String> propertiesMap = new HashMap<>();

private static void processProperties(Properties props) throws BeansException {
   propertiesMap = new HashMap<String, String>();
   for (Object key : props.keySet()) {
     String keyStr = key.toString();
     try {
       // PropertiesLoaderUtils的默认编码是ISO-8859-1,在这里转码一下
       propertiesMap.put(keyStr, new String(props.getProperty(keyStr).getBytes("ISO-8859-1"), "utf-8"));
     } catch (UnsupportedEncodingException e) {
       e.printStackTrace();
     } catch (java.lang.Exception 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).toString();
 }

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

Applaction.java 启动类


package com.zyd.property;

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

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.PropertiesListenerConfig;
import com.zyd.property.listener.PropertiesListener;

/**
* @author <a href="mailto:yadong.zhang0415@gmail.com" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >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 {
 /**
  *
  * 第四种方式:通过注册 * (`Listeners`) + `PropertiesLoaderUtils`的方式
  *
  * @author zyd
  * @throws UnsupportedEncodingException
  * @since JDK 1.7
  */
 @RequestMapping("/listener")
 public Map<String, Object> listener() {
   Map<String, Object> map = new HashMap<String, Object>();
   map.putAll(PropertiesListenerConfig.getAllProperty());
   return map;
 }

public static void main(String[] args) throws Exception {
   SpringApplication application = new SpringApplication(Applaction.class);
   // 第四种方式:注册 *
   application.addListeners(new PropertiesListener("app-config.properties"));
   application.run(args);
 }
}

访问结果:

{"com.zyd.name":"zyd","com.zyd.address":"Beijing","com.zyd.title":"使用Listeners + PropertiesLoaderUtils获取配置文件","com.zyd.type":"Springboot - Listeners","com.zyd.company":"in"}

来源:https://blog.csdn.net/thc1987/article/details/78789426

0
投稿

猜你喜欢

手机版 软件编程 asp之家 www.aspxhome.com