Could not resolve placeholder ' master.jdbc.url ' in string value ' ${master.jdbc.url} '

Org.springframework.beans.factory.BeanDefinitionStoreException:Invalid Bean definition with name ' Masterdatasource ' defined in file [C:\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\xinghe-mycenter-web\ Web-inf\classes\spring\applicationcontext-dbpool-c3p0.xml]: Could not resolve placeholder ' master.jdbc.url ' in string Value "${master.jdbc.url}"; Nested exception is java.lang.IllegalArgumentException:Could isn't resolve placeholder ' master.jdbc.url ' in string value ' $ {Master.jdbc.url} "

Obviously, the C3P0 connection pool is used in the project. This error occurs because the configuration file is missing and, strictly speaking, c3p0 cannot find a configuration item named "Master.jdbc.url" from the configuration file. Workaround: As shown in the following illustration, this is a MAVEN Web project that is created if there is no corresponding directory or file.
Jdbc.properties file content: You can actually call another name, but the extension is immutable.

# DataSource related
jdbc.driver.class=com.mysql.jdbc.driver

master.jdbc.url=jdbc:mysql:// 192.168.1.127:3306/testcs_dn?useunicode=true&characterencoding=utf-8&zerodatetimebehavior= Converttonull&transformedbitisboolean=true&relaxautocommit=true&useserverpreparedstmts=true
MASTER.JDBC.USERNAME=ABCD
master.jdbc.password=**********

Re-release: It is best to clean,publish usually no problem, it is difficult to talk about the situation of bad character ...