@Value
annotation works on new releases of Spring (tested on v3.2.2)
Here is how it is done:
1. Map your properties file in spring configuration file
<!--Import Info:
xmlns:context="http://www.springframework.org/schema/context"
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;
<context:property-placeholder location="classpath:/app-config.properties" />
2. Create app-config.properties inside (root) your source folder
my.property=test
my.property2=test2
3. Create a controller class
@Controller
public class XRDSBuilder
{
@Value("${my.property}")
private String myProperty;
public String getMyProperty() { return myProperty; }
}
Spring will automatically map the content of my.property to your variable inside the controller
[Mapping to a list][1]
Property value:
my.list.property=test,test2,test3
Controller class configuration:
@Value("#{'${my.list.property}'.split(',')}")
private List<String> myListProperty;
[Advanced mapping][2]
@Component("PropertySplitter")
public class PropertySplitter {
/**
* Example: one.example.property = KEY1:VALUE1,KEY2:VALUE2
*/
public Map<String, String> map(String property) {
return this.map(property, ",");
}
/**
* Example: one.example.property = KEY1:VALUE1.1,VALUE1.2;KEY2:VALUE2.1,VALUE2.2
*/
public Map<String, List<String>> mapOfList(String property) {
Map<String, String> map = this.map(property, ";");
Map<String, List<String>> mapOfList = new HashMap<>();
for (Entry<String, String> entry : map.entrySet()) {
mapOfList.put(entry.getKey(), this.list(entry.getValue()));
}
return mapOfList;
}
/**
* Example: one.example.property = VALUE1,VALUE2,VALUE3,VALUE4
*/
public List<String> list(String property) {
return this.list(property, ",");
}
/**
* Example: one.example.property = VALUE1.1,VALUE1.2;VALUE2.1,VALUE2.2
*/
public List<List<String>> groupedList(String property) {
List<String> unGroupedList = this.list(property, ";");
List<List<String>> groupedList = new ArrayList<>();
for (String group : unGroupedList) {
groupedList.add(this.list(group));
}
return groupedList;
}
private List<String> list(String property, String splitter) {
return Splitter.on(splitter).omitEmptyStrings().trimResults().splitToList(property);
}
private Map<String, String> map(String property, String splitter) {
return Splitter.on(splitter).omitEmptyStrings().trimResults().withKeyValueSeparator(":").split(property);
}
}
Property value:
my.complex.property=test1:value1,test2:value2
Controller class:
@Value("#{PropertySplitter.map('${my.complex.property}')}")
Map<String, String> myComplexProperty;
[1]:
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[2]:
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]
