Spring Boot读取配置文件与配置文件优先级
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SpringBoot
Spring Boot读取配置文件
1)通过注入ApplicationContext 或者 Environment对象来读取配置文件里的配置信息。
package com.ivan.config.controller;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.ApplicationContext;import org.springframework.core.env.Environment;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class ConfigController { @Autowired ApplicationContext context; @Autowired Environment environment; @RequestMapping(value="/config", method={RequestMethod.GET}) public String getConfigContent(){ String name = context.getEnvironment().getProperty("db.user.name"); return name; } @RequestMapping(value="/configEnv", method={RequestMethod.GET}) public String getConfigEnvironment(){ String name = environment.getProperty("db.user.name"); return name; } }
2)通过@ConfigurationProperties配合@PropertySource读取配置文件里的配置信息。
1:通过@PropertySource指定当前类里属性的配置文件地址,ConfigurationProperties可以指定配置的前缀,@Configuration用于定义一个配置类:
package com.ivan.config.entity;import org.springframework.boot.context.properties.ConfigurationProperties;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.PropertySource;@Configuration@PropertySource("classpath:config/druid.properties")@ConfigurationProperties(prefix = "druid")public class DruidConfig { private int initialSize; private int minIdle; private int maxActive; private int maxWait; private String validationQuery; private boolean testWhileIdle; private boolean testOnBorrow; private boolean testOnReturn; public int getInitialSize() { return initialSize; } public void setInitialSize(int initialSize) { this.initialSize = initialSize; } public int getMinIdle() { return minIdle; } public void setMinIdle(int minIdle) { this.minIdle = minIdle; } public int getMaxActive() { return maxActive; } public void setMaxActive(int maxActive) { this.maxActive = maxActive; } public int getMaxWait() { return maxWait; } public void setMaxWait(int maxWait) { this.maxWait = maxWait; } public String getValidationQuery() { return validationQuery; } public void setValidationQuery(String validationQuery) { this.validationQuery = validationQuery; } public boolean isTestWhileIdle() { return testWhileIdle; } public void setTestWhileIdle(boolean testWhileIdle) { this.testWhileIdle = testWhileIdle; } public boolean isTestOnBorrow() { return testOnBorrow; } public void setTestOnBorrow(boolean testOnBorrow) { this.testOnBorrow = testOnBorrow; } public boolean isTestOnReturn() { return testOnReturn; } public void setTestOnReturn(boolean testOnReturn) { this.testOnReturn = testOnReturn; } @Override public String toString() { return "DruidConfig [initialSize=" + initialSize + ", minIdle=" + minIdle + ", maxActive=" + maxActive + ", maxWait=" + maxWait + ", validationQuery=" + validationQuery + ", testWhileIdle=" + testWhileIdle + ", testOnBorrow=" + testOnBorrow + ", testOnReturn=" + testOnReturn + "]"; } }
2:对应的配置文件:
druid.initialSize=5 druid.minIdle=5 druid.maxActive=20 druid.maxWait=60000 druid.validationQuery=select 'x'druid.testWhileIdle=true druid.testOnBorrow=true druid.testOnReturn=true
作者:良辰美景TT
链接:https://www.jianshu.com/p/6fcd33551532
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