03ae97b2eb
Spring Framework 6.2 introduced support for an escape character for
property placeholders (by default '\'). However, as of Spring Framework
6.2.6, there was no way to either escape the escape character or disable
escape character support.
For example, given a `username` property configured with the value of
`Jane.Smith` and a `DOMAIN\${username}` configuration string, property
placeholder replacement used to result in `DOMAIN\Jane.Smith` prior to
6.2 but now results in `DOMAIN${username}`. Similarly, an attempt to
escape the escape character via `DOMAIN\\${username}` results in
`DOMAIN\${username}`.
In theory, one should be able to disable use of an escape character
altogether, and that is currently possible by invoking
setEscapeCharacter(null) on AbstractPropertyResolver and
PlaceholderConfigurerSupport (the superclass of
PropertySourcesPlaceholderConfigurer).
However, in reality, there are two hurdles.
- As of 6.2.6, an invocation of setEscapeCharacter(null) on a
PropertySourcesPlaceholderConfigurer applied to its internal
top-level PropertySourcesPropertyResolver but not to any nested
PropertySourcesPropertyResolver, which means that the `null` escape
character could not be effectively applied.
- Users may not have an easy way to explicitly set the escape character
to `null` for a PropertyResolver or
PropertySourcesPlaceholderConfigurer. For example, Spring Boot
auto-configures a PropertySourcesPlaceholderConfigurer with the
default escape character enabled.
This first issue above has recently been addressed by gh-34861.
This commit therefore addresses the second issue as follows.
- To allow developers to easily revert to the pre-6.2 behavior without
changes to code or configuration strings, this commit introduces a
`spring.placeholder.escapeCharacter.default` property for use with
SpringProperties which globally sets the default escape character that
is automatically configured in AbstractPropertyResolver and
PlaceholderConfigurerSupport.
- Setting the property to an empty string sets the default escape
character to `null`, effectively disabling the default support for
escape characters.
spring.placeholder.escapeCharacter.default =
- Setting the property to any other character sets the default escape
character to that specific character.
spring.placeholder.escapeCharacter.default = ~
- Setting the property to a string containing more than one character
results in an exception.
- Developers are still able to configure an explicit escape character
in AbstractPropertyResolver and PlaceholderConfigurerSupport if they
choose to do so.
- Third-party components that wish to rely on the same feature can
invoke AbstractPropertyResolver.getDefaultEscapeCharacter() to obtain
the globally configured default escape character.
See gh-9628
See gh-34315
See gh-34861
Closes gh-34865
|
||
|---|---|---|
| .github | ||
| .idea | ||
| buildSrc | ||
| framework-api | ||
| framework-bom | ||
| framework-docs | ||
| framework-platform | ||
| gradle | ||
| integration-tests | ||
| spring-aop | ||
| spring-aspects | ||
| spring-beans | ||
| spring-context | ||
| spring-context-indexer | ||
| spring-context-support | ||
| spring-core | ||
| spring-core-test | ||
| spring-expression | ||
| spring-instrument | ||
| spring-jcl | ||
| spring-jdbc | ||
| spring-jms | ||
| spring-messaging | ||
| spring-orm | ||
| spring-oxm | ||
| spring-r2dbc | ||
| spring-test | ||
| spring-tx | ||
| spring-web | ||
| spring-webflux | ||
| spring-webmvc | ||
| spring-websocket | ||
| src | ||
| .editorconfig | ||
| .gitattributes | ||
| .gitignore | ||
| .sdkmanrc | ||
| CONTRIBUTING.md | ||
| LICENSE.txt | ||
| README.md | ||
| SECURITY.md | ||
| build.gradle | ||
| gradle.properties | ||
| gradlew | ||
| gradlew.bat | ||
| import-into-eclipse.md | ||
| import-into-idea.md | ||
| settings.gradle | ||
| update_copyright_headers.sh | ||
README.md
Spring Framework 
This is the home of the Spring Framework: the foundation for all Spring projects. Collectively the Spring Framework and the family of Spring projects are often referred to simply as "Spring".
Spring provides everything required beyond the Java programming language for creating enterprise applications for a wide range of scenarios and architectures. Please read the Overview section of the reference documentation for a more complete introduction.
Code of Conduct
This project is governed by the Spring Code of Conduct. By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to spring-code-of-conduct@spring.io.
Access to Binaries
For access to artifacts or a distribution zip, see the Spring Framework Artifacts wiki page.
Documentation
The Spring Framework maintains reference documentation (published and source), GitHub wiki pages, and an API reference. There are also guides and tutorials across Spring projects.
Micro-Benchmarks
See the Micro-Benchmarks wiki page.
Build from Source
See the Build from Source wiki page and the CONTRIBUTING.md file.
Continuous Integration Builds
Information regarding CI builds can be found in the Spring Framework Concourse pipeline documentation.
Stay in Touch
Follow @SpringCentral, @SpringFramework, and its team members on 𝕏. In-depth articles can be found at The Spring Blog, and releases are announced via our releases feed.
License
The Spring Framework is released under version 2.0 of the Apache License.