Springboot 读取自定义pro文件注入static静态变量方式

mailConfig.properties

#服务器mail.host=smtp.qq.com#端口号mail.port=587#邮箱账号mail.userName=hzy_daybreak_lc@foxmail.com#邮箱授权码mail.passWord=vxbkycyjkceocbdc#时间延迟mail.timeout=25000#发送人mail.emailForm=hzy_daybreak_lc@foxmail.com#发件人mail.personal=华夏衣裳#主题mail.subject=同袍用户激活#内容模板mail.html=您的邮箱验证码为：

MailConfig.java

/* * @(#)MailConfig.java Created on 2019年9月11日 * Copyright (c) 2019 ZDSoft Networks, Inc. All rights reserved. * $Id$ */package com.hxyc.config.properties; import org.springframework.beans.factory.annotation.Value;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.PropertySource;import org.springframework.stereotype.Component; /** * @author huangzy * @version $Revision: 1.0 $, $Date: 2019年9月11日 上午10:29:35 $ */@Configuration@PropertySource(value = 'classpath:config/mailConfig.properties', encoding = 'UTF-8')@Componentpublic class MailConfig { public static String host; public static Integer port; public static String userName; public static String passWord; public static String emailForm; public static String timeout; public static String personal; public static String html; public static String subject; /** * @return Returns the host. */ public static String getHost() {return host; } /** * @param host * The host to set. */ @Value('${mail.host}') public void setHost(String host) {MailConfig.host = host; } /** * @return Returns the port. */ public static Integer getPort() {return port; } /** * @param port * The port to set. */ @Value('${mail.port}') public void setPort(Integer port) {MailConfig.port = port; } /** * @return Returns the userName. */ public static String getUserName() {return userName; } /** * @param userName * The userName to set. */ @Value('${mail.userName}') public void setUserName(String userName) {MailConfig.userName = userName; } /** * @return Returns the passWord. */ public static String getPassWord() {return passWord; } /** * @param passWord * The passWord to set. */ @Value('${mail.passWord}') public void setPassWord(String passWord) {MailConfig.passWord = passWord; } /** * @return Returns the emailForm. */ public static String getEmailForm() {return emailForm; } /** * @param emailForm * The emailForm to set. */ @Value('${mail.emailForm}') public void setEmailForm(String emailForm) {MailConfig.emailForm = emailForm; } /** * @return Returns the timeout. */ public static String getTimeout() {return timeout; } /** * @param timeout * The timeout to set. */ @Value('${mail.timeout}') public void setTimeout(String timeout) {MailConfig.timeout = timeout; } /** * @return Returns the personal. */ public static String getPersonal() {return personal; } /** * @param personal * The personal to set. */ @Value('${mail.personal}') public void setPersonal(String personal) {MailConfig.personal = personal; } /** * @return Returns the html. */ public static String getHtml() {return html; } /** * @param html * The html to set. */ @Value('${mail.html}') public void setHtml(String html) {MailConfig.html = html; } /** * @return Returns the subject. */ public static String getSubject() {return subject; } /** * @param subject * The subject to set. */ @Value('${mail.subject}') public void setSubject(String subject) {MailConfig.subject = subject; } }springboot静态属性注入的解决第一种方式

通过springboot组件初始化生命周期进行属性（对象）赋值

@Componentpublic class DSHWechatApiUtil extends DSHBaseController { @Autowired private IThirdPartyAuthDao thirdPartyAuthDao; private static IThirdPartyAuthDao staticThirdPartyAuthDao;@PostConstruct public void init() {staticThirdPartyAuthDao = thirdPartyAuthDao; } public static JSONObject getAuthorizerToken(String componentAccessToken, String authorizerAppid, String authorizerRefreshToken) {JSONObject returnObject = new JSONObject();try { if (DSHUtils.isEmpty(componentAccessToken)) {componentAccessToken = staticThirdPartyAuthDao.selectWechatValue(DSHConstants.WECHAT_PARAMS.COMPONENT_ACCESS_TOKEN); }} catch (Exception e) { e.printStackTrace();}return returnObject; }}

可以看到，当DSHWechatApiUtil工具类组件进行初始化时，调用@PostConstruct注解标注的方法，对静态变量进行了赋值。

通过@Value()注解

@Value()注解不会对静态变量进行属性注入，通过第一种方式的思维，那么我们肯定得想个办法，在这个组件初始化时也来赋值。

第一种方式肯定也是可以的，先写一个属性，然后通过@Value()注解对这个属性进行赋值，最后通过@PostConstruct注解方式赋值给静态属性。

这里我们要采用另一个方式，这里的方式是通过set方法来赋值。属性是static修饰的，get方法也是static修饰的，但是set方法不能是static修饰，使用@Value()注解来修饰set方法。

这样就能成功注入。

第三种方式和第二种差不多，

@ConfigurationProperties(prefix = ProjectConfig.PROJECT_PREFIX)public class ProjectConfig { public static final String PROJECT_PREFIX = 'project'; /** * 系统版本号 */ private String version; /** * 项目名称 */ private String name; /** * 版权年份 */ private String copyrightYear; /** * 实例演示开关 */ private static boolean demoEnabled; /** * 获取地址ip开关 */ private static boolean addressEnabled; public String getVersion() {return version; } public void setVersion(String version) {this.version = version; } public String getName() {return name; } public void setName(String name) {this.name = name; } public String getCopyrightYear() {return copyrightYear; } public void setCopyrightYear(String copyrightYear) {this.copyrightYear = copyrightYear; } public boolean isDemoEnabled() {return demoEnabled; } public void setDemoEnabled(boolean demoEnabled) {ProjectConfig.demoEnabled = demoEnabled; } public static boolean isAddressEnabled() {return addressEnabled; } public void setAddressEnabled(boolean addressEnabled) {ProjectConfig.addressEnabled = addressEnabled; }}

如上述代码，只要把set方法设置为非静态，那么这个配置类的静态属性就能成功注入了。

以上为个人经验，希望能给大家一个参考，也希望大家多多支持好吧啦网。