读取Properties配置文件值

app.xml

<!-- 引用 -->

<context:property-placeholder ignore-resource-not-found="true"
                                      location="classpath*:/application.properties,classpath*:/application.development.properties"/>
        

use.java

@Value( "${jdbc.url}" )
private String jdbcUrl;

//spring property placeholders 使用: ${key:defaultValue}

//或

@Autowired
private Environment env;
...
env.getProperty("jdbc.url");