Spring @PropertySource，如何读取不在类路径上但在WEB-INF下的文件

Spring version 4.2.2: What would be the Java Config replacement for the following:

Spring版本4.2.2：Java Config替代以下内容：

<bean id="placeholderConfig"
    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="location" value="/WEB-INF/conf/mars.properties" />
</bean>

I have the following in one of the Config. files:

我在其中一个Config中有以下内容。文件：

@Configuration
@EnableTransactionManagement
@ComponentScan
@PropertySource("file:WEB-INF/conf/mars.properties")
public class JpaConfig {

private static final String DB_DRIVER = "a";
private static final String DB_URL = "b";    
private static final String DB_USERNAME = "c";
private static final String DB_PASSWORD = "d";
private static final String DB_PLATFORM = "e";

@Resource
private Environment env;

@Bean(destroyMethod="close")
public DataSource dataSource() {
org.apache.tomcat.jdbc.pool.DataSource ds = new org.apache.tomcat.jdbc.pool.DataSource();
PoolProperties p = new PoolProperties();

p.setUrl(env.getProperty(DB_URL));
p.setDriverClassName(env.getProperty(DB_DRIVER));
p.setUsername(env.getProperty(DB_USERNAME));
p.setPassword(env.getProperty(DB_PASSWORD));
....
}

This results in the following runtime error:

这会导致以下运行时错误：

Caused by: java.io.FileNotFoundException: \WEB-INF\conf\mars.properties (The system cannot find the path specified)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)

I tried the following variations but to no avail:

我尝试了以下变化，但无济于事：

@PropertySource("file://WEB-INF/conf/mars.properties")

This is an XML configured based application I'm converting to Java Config.

这是一个基于XML配置的应用程序，我正在转换为Java Config。

1 个解决方案

#1

All you need is

所有你需要的是

@PropertySource("/WEB-INF/conf/mars.properties")

Spring will use DefaultResourceLoader#getResource(String). For paths starting with /, this delegates to getResourceByPath which is overriden by AbstractRefreshableWebApplicationContext (the superclass of AnnotationConfigWebApplicationContext which handles @Configuration).

Spring将使用DefaultResourceLoader＃getResource（String）。对于以/开头的路径，此委托给getResourceByPath，后者由AbstractRefreshableWebApplicationContext（处理@Configuration的AnnotationConfigWebApplicationContext的超类）覆盖。

This will then create a ServletContextResource which can successfully locate the resource relative to the servlet context.

然后，这将创建一个ServletContextResource，它可以成功地找到相对于servlet上下文的资源。

#1