spring-mvc

问题 I want to add multiple classes using condition. <div th:classappend="x.isTrue ?'class1' " ></div> I want something like <div th:classappend="x.isTrue ?'class1' and "y.isTrue ?'class2'" ></div> 回答1: You can use literal substitutions to achieve this: <div th:classappend="|${x.isTrue ? 'class1' : ''} ${y.isTrue ? 'class2' : ''}|"></div> Another method is to simply wrap your conditions with brackets and concatenate them: <div th:classappend="${(x.isTrue ? 'class1' : '') + (y.isTrue ? ' class2' :

问题 I use Apache POI 3.16 to create an Excel file. I want to set the data inside a particular cell to have a linebreak : rowConsommationEtRealisation.createCell(0).setCellValue("Consommation (crédits)\r\nRéalisation (produits)"); When I open the file then the cell value does not have linebreak ! So how to create linebreak ? 回答1: Try this: here Row row = sheet.createRow(2); Cell cell = row.createCell(2); cell.setCellValue("Use \n with word wrap on to create a new line"); //to enable newlines you

问题 I managed to create simple Websocket application with Spring 4 and Stomp. See my last question here Then I tried to use remote message broker(ActiveMQ). I just started the broker and changed registry.enableSimpleBroker("/topic"); to registry.enableStompBrokerRelay("/topic"); and it worked. The question is how the broker is configured? I understand that in this case the application automagicaly finds the broker on localhost:defaultport, bu what if I need to point the app to some other broker

问题 I managed to create simple Websocket application with Spring 4 and Stomp. See my last question here Then I tried to use remote message broker(ActiveMQ). I just started the broker and changed registry.enableSimpleBroker("/topic"); to registry.enableStompBrokerRelay("/topic"); and it worked. The question is how the broker is configured? I understand that in this case the application automagicaly finds the broker on localhost:defaultport, bu what if I need to point the app to some other broker

问题 I have this in web.xml <filter> <filter-name>encoding-filter</filter-name> <filter-class> org.springframework.web.filter.CharacterEncodingFilter </filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encoding-filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> and at the top of file.jsp

问题 I need to implement an MVC web service. I selected Spring MVC/Data JPA for this purpose So my service need to: Load some entities Make some business logic on it Update the entities and store it All above need to be in atomic manner Some code snippet to clarify: @Service public class AService { @Autowired private Repository1 repository1; @Autowired private Repository2 repository2; @Autowired private Repository3 repository3; @Transactional public Result getResult(Long id) { Entity1 e1 =

问题 I have two table country and city in mysql dababase and i make a query to return records like that as List<myDTO> : 1,france,1,paris 1,france,2,marseille 1,france,3,lion .... MyDTO public class MyDTO { public Integer idLvl1; public String nameLvl1; public Integer idLvl2; public String nameLvl2; public MyDTO(Integer idLvl1, String nameLvl1, Integer idLvl2, String nameLvl2) { this.idNiv1 = idLvl1; this.nomNiv1 = nameLvl1; this.idNiv2 = idLvl2; this.nomNiv2 = nameLvl2; } How can i convert it to

问题 As you can see I have two named parameters, one being set by setParameterList() and one being set by setParmeter(). The problem is the List is not being ordered. When I set the order field explicitly it works fine, but the same string is being passed into the method it doesn't work. Is it that setParameter and and setParameterList can't be chained? They both return a query do I don't see why not. What am I missing? public List<Subject> getSubjectsByMedium(String orda, Medium... medium) { List

问题 I have a bean declared with annotation @Bean @Bean public Set<DefaultMessageListenerContainer> beans() { Set<DefaultMessageListenerContainer> containerSet = new HashSet<DefaultMessageListenerContainer>(); return containerSet; } I have some operations to be performed when I am destroying the bean. How can I achieve that? I know I can use @predestroy annotation on a method in a class annotated with @Component but not sure how can I do that when declared @Bean annotation. EDIT : @Bean

问题 I am working on a project, and having file object set through spring (beans), and using RequiredArgsConstructor of Lombok to do so. Code: Spring.xml: <bean id=".." class="ImageDataProcess"> <constructor-arg ref="x.y.z.file.newImageDataFile" /> <other constructor args> </bean> ImageDataProcess.java: @RequiredArgsConstructor public class ImageDataProcess implements PQR { private final File newImageDataTextFile; //other values coming from spring @Override public void execute() { ://logic here :