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Spring Boot 启动时修改上下文

• 为了让项目在启东时，加载到封装的JAR中的国际化文件
• 在封装JAR是增加以下配置类
• 可用于更改启动上下文中的信息
• 依赖

        <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-autoconfigure</artifactId><version>2.7.18</version></dependency>

• 示例

import org.apache.commons.lang3.StringUtils;
import org.springframework.context.ApplicationContextInitializer;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.Ordered;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.Environment;
import org.springframework.core.env.MapPropertySource;import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.Set;public class EnviromentAutoConfigration implements ApplicationContextInitializer<ConfigurableApplicationContext>, Ordered {@Overridepublic int getOrder() {return Integer.MAX_VALUE;}@Overridepublic void initialize(ConfigurableApplicationContext applicationContext) {ConfigurableEnvironment environment = applicationContext.getEnvironment();HashMap<String, Object> properties = new HashMap<>();properties.put("spring.messages.basename", getMessagesBasenameProperty(environment));MapPropertySource propertySource = new MapPropertySource("", properties);environment.getPropertySources().addFirst(propertySource);}
/*
*读取指定的国际化文件
*/private static String getMessagesBasenameProperty(Environment environment) {LinkedHashSet<Object> basenames = new LinkedHashSet<>();String basenameString = environment.getProperty("spring.messages.basename");if (StringUtils.isNoneBlank(basenameString)) {basenames.addAll(Set.of(basenameString.split(",")));}basenames.add("messages/xxx_messages");return String.join(",",basenames);}
}

resources目录下META-INF文件夹spring.factories文件配置指定类

#上下文，环境配置，这个会先读取
org.springframework.cloud.BootstrapConfiguration=xxx.EnviromentAutoConfigration
#读取@Configuration注解的配置文件
org.springframework.boot.autoconfigure.EnableAutoConfiguration=