spring-el

问题 I'm using Spring but not that familiar with all its capabilities. Looking for a good way to copy fields from one Java object instance to another. I've seen How to copy properties from one Java bean to another? but what i'm looking for is more specific, so here are the details: Suppose I have two instances of some class P, source & target, which have getters and setters a,b,c,d and 20 others. I want to copy the properties of of source into target, but only for all properties in a list of

问题 I am trying to load a property file from an environment variable, so here's what I tried: <bean id="propertyPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:messages/application.properties</value> <value>file:${My_ENV_VAR}/*.properties</value> </list> </property> <property name="ignoreResourceNotFound" value="true" /> <property name="searchSystemEnvironment" value="true" /> <property name

问题 I'm working on a JSP tag. Here is the old line that starts looping through items in a model: <c:forEach var="toc" items="${requestScope[formKey].model.sharingTocs}"> But the code has been refactored so the model path ( model.sharingTocs above) is now dynamic rather than fixed. It is now passed into the tag via a JSP @attribute : <%@attribute name="path" required="true"%> So ${path} now evaluates to "model.sharingTocs" . How can items now be assigned? 回答1: Well. Good question. This is a

问题 I'm trying to set a cron Scheduled annotation as follows: @Scheduled(cron = "#{systemEnvironment['db_cron']}") def void schedule() { } Next set the environment variable as: export db_cron="0 19 21 * * *" However, I get the runtime error: Cron expression must consist of 6 fields (found 1 in "#{systemEnvironment['db_cron']}") What can be going wrong? EDIT I have also tried: @Scheduled(cron = "${db_cron}") But this returns a compile time error: /Users/snowch/repos/sales/Prospects/Snow/Plugwise

问题 I'm trying to configure a spring bean based on an application property, my end goal is described in the following pseudo code: if ${my.config} <bean id="myBean" class="path.to.MyBeanImplOne" /> else <bean id="myBean" class="path.to.MyBeanImplTwo" /> end where my.config is a boolean property. According to this SpEL guide, #{${my.config} ? 'path.to.MyBeanImplOne' : 'path.to.MyBeanImplTwo'} is a valid expression, so I tried the following configuration: <bean id="myBean" class="#{${my.config} ?

问题 I have this properties class: import java.util.List; import org.springframework.boot.context.properties.ConfigurationProperties; @ConfigurationProperties("some") public class SomeProperties { private List<String> stuff; public List<String> getStuff() { return stuff; } public void setStuff(List<String> stuff) { this.stuff = stuff; } } and I enable configuration properties in an @Configuration class like so: import org.springframework.boot.context.properties.EnableConfigurationProperties;

问题 I'm new to Spring AOP (and AOP in general), need to implement the following: @HasPermission(operation=SecurityOperation.ACTIVITY_EDIT, object="#act") public Activity updateActivity(Activity act) { ... } @HasPermission is my custom annotation, which will be used to mark all methods requiring pre-authorization. I'm using my custom implementation of security checks based on Apache Shiro. Generally, I guess that I will need to define pointcut which matches all annotated methods and also provide

问题 In looking at the Query Creation for the Spring Data JPA Repositories, I'm wondering how I would reuse a parameter. For example, how would I name the method if I wanted to do something like: @Query("select c from #{#entityName} c where c.lower <= ?1 and c.upper >= ?1") E findByConversionFor(Double amount); Can that query be converted to a SpEL method name (to be used by the query builder)? It seems like a kludge to require the same value to be passed twice: E

问题 Long story short: Is there a way to interpret the string resulting from ${my.property} as a SpEL expression within a @Value annotation without using converters, e.g. something like @Value("#{${my.property}} )? I have an abstract factory (simplified) that lets me build some common objects that are part of the configuration of my system. @Component public class Factory { public Product makeVal(int x) { return new Product(5); } } In order to be more flexible, I'd like to let users write SpEL

问题 I'm having an issue with Spring Integration. I'm using Spring Boot 1.4.0.RELEASE, Spring Integration 4.3.1.RELEASE, Spring Integration DSL 1.2.0.M1. What I'm trying to do: I'm writing an application that will read files from FTP and local file system (using inbound channel adapters), transfer the files to a local working directory (using file outbound gateways), process, then move them to a final destination (file outbound gateway/adapters). EDIT: The original issue stemmed from incorrect