Difference between revisions of "Spring tips"
From DarkWiki
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<source lang="java"> | <source lang="java"> | ||
@GetMapping("/api/test/pagination") | @GetMapping("/api/test/pagination") | ||
| − | public Page<String> | + | public Page<String> pager(@PageableDefault(sort = "name",direction = Sort.Direction.ASC) Pageable pageable) { |
return new PageImpl<>(List.of("test"),pageable,1); | return new PageImpl<>(List.of("test"),pageable,1); | ||
} | } | ||
Revision as of 11:51, 2 April 2020
Configuration
@Value
Simple setting of values.
@Value("${prop.strName:default value}}")
private String localDir;
@Value("${prop.intName:14}}")
private int localDir;
Apply a setting, defaulting to a subdirectory of the temporary folder.
@Value("${prop.name:#{systemProperties['java.io.tmpdir']+'/subdir'}}")
private String localDir;
When a value is not present in the application.properties file, assume null.
@Value("${prop.name:#{null}}")
private String remoteUrl;
Noteworthy classes
| Class | Notes |
|---|---|
| ClassPathScanningCandidateComponentProvider | Used for scanning for annotated classes etc. See: https://gist.github.com/skempken/dbb2ad55d213cd6a1f50 |
| SpringDataWebProperties | A good example of how Spring configuration properties are bound from YML (etc.) |
Further reading
A list of configuration properties can be found here: https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html
Data
Pageable
Given an endpoint:
@GetMapping("/api/test/pagination")
public Page<String> pager(@PageableDefault(sort = "name",direction = Sort.Direction.ASC) Pageable pageable) {
return new PageImpl<>(List.of("test"),pageable,1);
}
It can be called using:
http://localhost:8080/api/test/pagination?sort=andy,desc&sort=age,asc
