Blog

Создаю небольшой проект, связанный с университетами. Использую Spring MVC, Spring Data, JPA, Hibernate, MySQL. В проекте имеются две таблицы (“UNIVERSITIES” и “CONNECTIONS”) и соответственно два сущностных класса (“University” и “Connection”). На самом деле и таблиц и сущностей больше, но остальное не касается имеющегося вопроса. Сущностные классы выглядят следующим образом: @Entity @Table(name = “universities”) public classRead more

Se me presenta el siguiente error al intentar desplegar una aplicacion Spring-roo en tomcat > 018-01-07 15:52:59.621 WARN 3860 — [st-startStop-10] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization – cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘entityManagerFactory’ defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.service.spi.ServiceException: UnableRead more

How can I send a HTML Form with a DELETE Method to a @DeleteMapping In Spring 4 or 5? Using form:form by Spring, it creates a input hidden, named “method” and pass a DELETE value, but doesnt work. I read something about a HiddenHttpMethodFilter filter, but was in Spring 3.Read more

I have a headboard with a frame (not metal ) and it has planks in the center. Im wondering now do i need a box spring or can i just put my mattress over the planksRead more

Ao redirecionar a página do formulário está acontecendo o seguinte erro… ERROR [org.springframework.web.servlet.tags.form.ErrorsTag] (default task-6) Invalid property ‘cliente’ of bean class [sistema.estoque.springmvc.model.Cliente]: Bean property ‘cliente’ is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?: org.springframework.beans.NotReadablePropertyException: Invalid property ‘cliente’ of bean classRead more

Имеется следующая структура проекта : Корень: <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.8.RELEASE</version> <relativePath/> <!– lookup parent from repository –> </parent> <groupId>NC</groupId> <artifactId>TrainsApp</artifactId> <version>1.0</version> <packaging>pom</packaging> <name>TrainsApp</name> <modules> <module>model</module> <module>dao</module> <module>service</module> <module>properties</module> <module>controller</module> <module>webcontroller</module> </modules> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.16.18</version> <scope>provided</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build> </project>Read more

Можно ли запускать потоки таким образом public class CustomThread extends Thread { @Override public void run() { while (true){ System.out.println(“I am “+ getName()); try { Thread.sleep(200); } catch (InterruptedException e) { e.printStackTrace(); } } } } @SpringBootApplication public class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); for (int i= 0;i<5;i++) new TestThread().start();Read more

I have spring boot app with spring security jwt authentication. I need some suggestions how I can improve/refactor code. Security Config @Configuration @EnableWebSecurity public class WebSecurityConfig extends WebSecurityConfigurerAdapter { public static final String JWT_TOKEN_HEADER_PARAM = “X-Authorization”; public static final String FORM_BASED_LOGIN_ENTRY_POINT = “/api/auth/login”; public static final String TOKEN_BASED_AUTH_ENTRY_POINT = “/api/**”; public static final String TOKEN_REFRESH_ENTRY_POINTRead more

As a follow up to my previous question, I’m curious as to how Spring Data REST is normally used? It seems that sometimes it requires three service calls to do one thing that can be done in a much cleaner way with a custom service. For example, say you have an existing object A, whichRead more

Primeiro vou dizer o que acontece! Eu desenvolvi um simples projeto Spring Boot para mostrar em tela uma GRID tendo como Frond-End o Angular, a requisição da API java é a porta 8080 e do Angular é porta 4200, como cada um faz requisições diferente eu resolvi usar o CORS, mas não tive resultado positivosRead more