如何在Tomcat中读取webapp上下文之外的属性文件 [英] How to read a properties file outside my webapp context in Tomcat

问题描述

我有这个要求，我的webapp需要从Tomcat webapps目录之外的属性文件中读取，例如从$ CATALINA_HOME / properties / myapp.properties读取。我尝试了几件事，但到目前为止没有运气

I have this requirement that my webapp needs to read from a properties file outside the Tomcat webapps directory, for example from $CATALINA_HOME/properties/myapp.properties. I have tried several things but so far no luck

推荐答案

有多种方法。

1. 使用环境变量


2. 使用系统属性


3. 将其设置为应用程序上下文参数Web.xml

下面是一个示例，显示选项1和选项2

Heres a sample ,that showsOption 1 and Option 2

try {

    //Use Any Environmental Variable , here i have used CATALINA_HOME
    String propertyHome = System.getenv("CATALINA_HOME");           
    if(null == propertyHome){

        //This is a system property that is  passed
        // using the -D option in the Tomcat startup script
        propertyHome  =  System.getProperty("PROPERTY_HOME");
    }


    String filePath= propertyHome+"/properties/myapp.properties";

    Properties property = new Properties();         
    property.load(SystemTest.class.getClassLoader().getResourceAsStream(filePath));
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

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