spring-el

问题 I am trying to parse an expression by using Spring Expression Language. if myVariable value is set to "first-name" (value with hyphen) then getting class.org.springframework.expression.spel.SpelParseException . ExpressionParser parser = new SpelExpressionParser(); String parsedDynamicVariablesValue = parser.parseExpression("#" + myVariable).getValue(stdContext, String.class); how to solve issue with the hyphen? Reference Used: Spring Expression Language (SpEL) 回答1: It doesn't work that way,

问题 Spring @Value with arraylist split and get the first value of arrayList I had my.list=a,b,c I am struggling to get the first value i.e., a I tried, @Value("#{'${my.list}'.split(',')}) List<String> values; String myVal = values.get(0); Is there any better method than this procedure? 回答1: U have a syntax error in this line @Value("#{'${my.list}'.split(',')}) That should be corrected as below @Value("#{'${my.list}'.split(',')}") List<String> values; I would suggest you below solution as a better

问题 I am currently having trouble with my dataSource bean creation on condition of String property from my applications.yaml file. Ideally, I would only like to create the dataSource bean only if the url is set in my application.yaml file. Shouldn't create the bean if its not present (empty or null). I know this condition checks on boolean but is there anyway to check if the string property is empty or null? DatabaseConfig.java @Configuration public class DatabaseConfig { @Value("${database.url:}

问题 I am trying to condtionally create a component using @ConditionalOnExpression("not ${service.synchronous} && not ${service.disabled}") . I based this on Spring Boot SpEL ConditionalOnExpression check multiple properties, which provides a multi-property conditional as follows: @ConditionalOnExpression("${properties.first.property.enable:true} && ${properties.second.property.startServer:false}") However, I keep getting: Caused by: org.springframework.expression.spel.SpelParseException: EL1041E:

问题 I'm trying to use a constant to define a property and then resolving it with the @Value annotation. I defined the constant in an interface: public interface InternalConstant{ public static final String JOB_NAME_PROPERTY = "javabatch.jobName"; } I'm using springboot and I'm adding the property as a default property to the context: SpringApplication springApp = new SpringApplication(configs.toArray()); Properties props = new Properties(); props.setProperty(InternalConstants.JOB_NAME_PROPERTY,

问题 I went through links like: How to pass a Map<String, String> with application.properties before posting the questions, but this doesn't fulfill my requirements. application.properties soap.all.endpoints={getEmployeeRoles: ['ABC', 'EFG'], getStudentRoles: ['PQR', 'XYZ']} I am reading using below code, but it gives me error. @Value("#{${soap.all.endpoints}}") private Map<String, List<String>> roles; Error : Caused by: org.springframework.beans.factory.BeanExpressionException: Expression parsing

问题 I'm using Spring Boot example to read the following from the properties file. sub.region.data={\ AF: {'subRegionCd' : '34', 'subRegionName' : 'Southern Asia', 'subRegionDesc': '', 'status' : 'A'} \ } I used below, but it doesn't works @Value("#{${sub.region.data}}") private Map<String, SubRegion> subRegionsMap; SubRegion.java public class SubRegion { private String subRegionCd; private String subRegionName; private String subRegionDesc; private String subRegionStatus; } I am getting below

问题 I'm using Spring Boot example to read the following from the properties file. sub.region.data={\ AF: {'subRegionCd' : '34', 'subRegionName' : 'Southern Asia', 'subRegionDesc': '', 'status' : 'A'} \ } I used below, but it doesn't works @Value("#{${sub.region.data}}") private Map<String, SubRegion> subRegionsMap; SubRegion.java public class SubRegion { private String subRegionCd; private String subRegionName; private String subRegionDesc; private String subRegionStatus; } I am getting below

问题 I'm trying to avoid redundancy with passing second argument to method with list size. Instead, I use EL, but I have an error: org.hibernate.QueryException: Not all named parameters have been set: [ $synthetic$__1] [SELECT distinct b FROM Book b join b.bookHashtags as ht where ht.hashtagName in :tags group by b.uniqueIdentifier having count(ht.uniqueIdentifier) = : $synthetic$__1] @Repository public interface BookRepository extends JpaRepository<Book, Long>, JpaSpecificationExecutor<Book> {

问题 I'm trying to avoid redundancy with passing second argument to method with list size. Instead, I use EL, but I have an error: org.hibernate.QueryException: Not all named parameters have been set: [ $synthetic$__1] [SELECT distinct b FROM Book b join b.bookHashtags as ht where ht.hashtagName in :tags group by b.uniqueIdentifier having count(ht.uniqueIdentifier) = : $synthetic$__1] @Repository public interface BookRepository extends JpaRepository<Book, Long>, JpaSpecificationExecutor<Book> {