无法在 spring 启动时从配置中读取文件

Question

I am working on spring boot app and in my config file I have couple o file and I want to read them. so I have tried below stuffs.

-Dspring.profiles.active=local -Dserver.port=8080 -Dajp.port=0 -Dspring.datasource.url=jdbc:oracle:thin:@localhost:1521:OraDoc -Dspring.datasource.username=system -Dspring.datasource.password=MyPasswd123 -Dspring.config.additional-location=file:/Users/bharatsuthar/HGW/codebaseDevelopmentRepo1/data-generation-tool/rdk-factory-data-config/ -Dlogging.config=file:/Users/bharatsuthar/HGW/codebaseDevelopmentRepo1/data-generation-tool/rdk-factory-data-config/logback-spring.xml

I am able to read all files since spring is supporting this by using -Dspring.config.additional-location but I am not sure how to read test.pem file in my java code as a String only.

below is my test.pem file location under rdk-factory-data-config directory

[location of test pem file] ( https://i.stack.imgur.com/4T0Y8.png )

I tried with -Dspring.config.additional-location here i am able to read file like application.yml and application-dev.yml but how can I read the test.pem file to String in my java code. I want to read pem file into String so that I can read the data in my spring boot app.

content of pem file:

-----BEGIN CERTIFICATE-----
MIIChjCCAg2gAwIBAgIQKgFtzZclg1CxcBAHZDc2cTAKBggqhkjOPQQDAzAzMQsw
CQYDVQQGEwJTSzEUMBIGA1UEChMLUkRLIEZhY3RvcnkxDjAMBgNVBAMTBVNLIFIx
MB4XDTIyMTAxMzA5MDAzMloXDTQ3MTAxMzIzNTk1OVowMzELMAkGA1UEBhMCU0sx
FDASBgNVBAoTC1JESyBGYWN0b3J5MQ4wDAYDVQQDEwVTSyBDMTB2MBAGByqGSM49
AgEGBSuBBAAiA2IABDSRscO50mm3uzavmLTS2DEw/J/1dRp5nmyWJNMp+B0/w5y7
AAvOLtcJDpulCFCXa/UhEfvbGEVvDtS9jY75YtOqvQkPIIuE6IUC6kyTXZaPOe+3
WwYbzYxpOXuMDOzZbaOB5TCB4jAOBgNVHQ8BAf8EBAMCAQYwHQYDVR0OBBYEFJJS
jPquJiIZ49geOU/NCAsvRaPOMB8GA1UdIwQYMBaAFPS8o9tW37TZ6W+OKy7hznHt
FR0dMBIGA1UdEwEB/wQIMAYBAf8CAQAwNwYDVR0fBDAwLjAsoCqgKIYmaHR0cDov
L2NybC5yZGsudGVsZXNlasdfasdfsYy5kZS9ybC9TS19SMS5jcmwwQwYIKwYBBQUHAQEENzA1
MDMGCCsGAQUFBzAqwrrewrChidodHRwOi8vY3J0LnJkay50ZWxlc2VjLmRlL2NydC9TS19S
MS5jcnQwCgYIKoZIzj0EAwMDZwAwZAIwITubLwiMJ6KpTmyI41kOcCd3VzjbdPsx
NB3RZIBf4o3BYBzT1FQqbXvnYHsEGX/oAjAm8cTa9+tcLrrxN/RGwr53apg6FYlz
xRKbLjARTg/dFAn4W0w59XZXJ/fBZ4F6m5A=
-----END CERTIFICATE-----

I have tried this -

String s = new String(Files.readAllBytes(Paths.get("test.pem")));           System.out.println("s=" + s);

-> it gives me no such file exception -->

Caused by: java.nio.file.NoSuchFileException: test.pem

---> I don't want to give full absolute path since my requirement is to read from directory which is in the root of my spring boot folder

thank you so much

Answer 1

As far as I understand, -Dspring.config.additional-location reads any property file or equivalent of it. *.pem files are not equivalent of property files so they should be ignored. Read Spring documentation

What you should do instead, put a property in your property file specifying your.pem file location and later, use that property to read the contents of your.pem file in whatever format seems fit to you.