spring无法读取properties文件数据问题详解

1. controller中无法读取config.properties文件

controller中注入的@Value配置是从servlet-context.xml配置文件中获取的;service中注入的@Value配置可以从applicationContext.xml中获取的。所以,如果要在controller中注入属性配置,需要在相应servlet文件中添加配置,同applicationContext.xml中一样。

专注于为中小企业提供做网站、网站设计服务,电脑端+手机端+微信端的三站合一,更高效的管理,为中小企业右江免费做网站提供优质的服务。我们立足成都,凝聚了一批互联网行业人才,有力地推动了近1000家企业的稳健成长,帮助中小企业通过网站建设实现规模扩充和转变。


  
    
       classpath:jdbc.properties
      classpath:config.properties
     
  
  

2.service中无法读取config.properties文件

查看配置文件是否有多个。如果配置的路径是classpath:config.properties, 鼠标点击文件。如果显示”multiple implementations”, 表示有多个文件,查看其他的文件中是否有需要的配置项,没有的话,很可能就是加载了其他文件的配置项。这时,将路径改为classpath*:config.properties即可。

查看日志,发现:

[2017-01-05 16:45:02 INFO ] [main] (org.springframework.context.support.PropertySourcesPlaceholderConfigurer:?) - Loading properties file from URL [jar:file:/home/admin/creative-task/lib/xxxx-common-1.5.7.jar!/config.properties]

[2017-01-05 16:45:02 INFO ] [main] (org.springframework.context.support.PropertySourcesPlaceholderConfigurer:?) - Loading properties file from URL [file:/home/admin/creative-task/conf/config.properties]

加载了两个config.properties文件。

3.关于诊断:

1)首先确认是否正确加载了配置文件。查看日志:

正常日志如下:

[2017-01-05 16:45:02 INFO ] [main] (org.springframework.context.support.PropertySourcesPlaceholderConfigurer:?) - Loading properties file from URL [file:/home/admin/creative-task/conf/config.properties]

 异常日志如下:

[2017-01-05 16:39:39 ERROR] [main] (Main:22) - Could not load properties; nested exception is java.io.FileNotFoundException: class path resource [config.properties] cannot be opened because it does not exist

org.springframework.beans.factory.BeanInitializationException: Could not load properties; nested exception is java.io.FileNotFoundException: class path resource [config.properties] cannot be opened because it does not exist 

如果文件没有加载,则查看路径是否匹配等。

2)如果文件加载ok,查看配置属性是否正确加载。

查看tomcat启动的debug日志:

正常日志如下:

[2017-01-05 16:45:04 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Searching for key 'adx.id' in [environmentProperties]

[2017-01-05 16:45:04 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Searching for key 'adx.id' in [systemProperties]

[2017-01-05 16:45:04 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Searching for key 'adx.id' in [systemEnvironment]

[2017-01-05 16:45:04 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Could not find key 'adx.id' in any property source. Returning [null]

[2017-01-05 16:45:04 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Searching for key 'adx.id' in [localProperties]

[2017-01-05 16:45:04 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Found key 'adx.id' in [localProperties] with type [String] and value '1'

异常日志如下:

[2017-01-05 16:34:01 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Searching for key 'adx.id' in [environmentProperties]

[2017-01-05 16:34:01 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Searching for key 'adx.id' in [systemProperties]

[2017-01-05 16:34:01 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Searching for key 'adx.id' in [systemEnvironment]

[2017-01-05 16:34:01 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Could not find key 'adx.id' in any property source. Returning [null]

[2017-01-05 16:34:01 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Searching for key 'adx.id' in [localProperties]

[2017-01-05 16:34:01 DEBUG] [main] (org.springframework.core.env.PropertySourcesPropertyResolver:?) - Could not find key 'adx.id' in any property source. Returning [null]

更多关于spring读取properties文件数据的文章请查看下面的相关文章


文章题目:spring无法读取properties文件数据问题详解
本文来源:http://pwwzsj.com/article/jpggij.html