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I am using sprin version 4.3.8.RELEASE. also i am using @Value to inject values from property file, if the properties are string that no problem, but if the property is Integer that is a problem (i know there is many questions about this i tried all the answers but the issue still exist)
The property is
CONNECTION.TIME.OUT=100000
First solution
@Value("${CONNECTION.TIME.OUT}")
protected Integer connectionTimeOut;
Ecxeption
Failed to convert value of type 'java.lang.String' to required type 'java.lang.Integer'; nested exception is java.lang.NumberFormatException: For input string: "${CONNECTION.TIME.OUT}"
Second solution
@Value("#{new Integer('${CONNECTION.TIME.OUT}')}")
protected Integer connectionTimeOut;
Exception
EL1003E: A problem occurred whilst attempting to construct an object of type 'Integer' using arguments '(java.lang.String)'
Third solution
@Value("#{new Integer.parseInteger('${CONNECTION.TIME.OUT}')}")
protected Integer connectionTimeOut;
Exception
EL1003E: A problem occurred whilst attempting to construct an object of type 'Integer' using arguments '(java.lang.String)'
any ideas why is that
767
Spring @Value annotation is used to assign default values to variables and method arguments. We can read spring environment variables as well as system variables using @Value annotation.
@Value is a Java annotation that is used at the field or method/constructor parameter level and it indicates a default value for the affected argument. It is commonly used for injecting values into configuration variables - which we will show and explain in the next part of the article.
Property values can be injected directly into your beans using the @Value annotation, accessed via Spring's Environment abstraction or bound to structured objects via @ConfigurationProperties . Spring Boot uses a very particular PropertySource order that is designed to allow sensible overriding of values.
You can do this in Spring 3 using EL support. Example: @Value("#{systemProperties. databaseName}") public void setDatabaseName(String dbName) { ... }
To avoid such type of situation where the exception occurs due to un-availibilty of the property, Add default value in the tag. If property is not available then it will populate the default value
@Value("${CONNECTION.TIME.OUT:10}")
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