public class FileEncodingApplicationListener extends Object implements ApplicationListener<ApplicationEnvironmentPreparedEvent>, Ordered
ApplicationListenerthat halts application startup if the system file encoding does not match an expected value set in the environment. By default has no effect, but if you set
spring.mandatory_file_encoding(or some camelCase or UPPERCASE variant of that) to the name of a character encoding (e.g. "UTF-8") then this initializer throws an exception when the
file.encodingSystem property does not equal it.
The System property
file.encoding is normally set by the JVM in response to the
LC_ALL environment variables. It is used (along with other
platform-dependent variables keyed off those environment variables) to encode JVM
arguments as well as file names and paths. In most cases you can override the file
encoding System property on the command line (with standard JVM features), but also
consider setting the
LANG environment variable to an explicit
character-encoding value (e.g. "en_GB.UTF-8").
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