随笔分类 - Java
摘要：public class Code { public static void main(String[] args) { Arrays.asList("red", "green", "blue") .stream() .sorted() .findFirst() .ifPresent(System.
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摘要：public class Code { public static void main(String[] args) { List<String> names = Arrays.asList("Paul", "Jane", "Sam", "Michaela"); // Way to sort pri
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摘要：Testing JWT proteceted endpoint: /** * HTTP POST /tours/{tourId}/ratings */ @Test public void createTourRating() throws Exception { restTemplate.excha
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摘要：Provider: package com.example.ec.security; import com.example.ec.domain.Role; import io.jsonwebtoken.*; import org.springframework.beans.factory.annot
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摘要：package com.example.ec.security; import com.example.ec.repo.RoleRepository; import org.springframework.beans.factory.annotation.Autowired; import org.
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摘要：Controller: @RestController @RequestMapping(path = "/ratings") public class RatingController { private static final Logger LOGGER = LoggerFactory.getL
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摘要：Service: package com.example.ec.service; import com.example.ec.domain.Tour; import com.example.ec.domain.TourRating; import com.example.ec.repo.TourRa
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摘要：If one request failed, we want to keep database untouched as if the request never happen. Spring makes it easy to add: @Transactional To the method or
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摘要：Repo: public interface CourseRepository extends CrudRepository<Course,Integer>{ Optional<Course> findByName(String name); @Query("Select new com.examp
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摘要：@Test public void queryByExample() { System.out.println("\nFind the Department with the name 'Humanities' \n" + departmentRepository.findOne(Example.o
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摘要：package com.example.university.repo; import com.example.university.domain.Staff; import org.springframework.data.domain.Page; import org.springframewo
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摘要：package com.example.university.repo; import com.example.university.domain.Staff; import com.example.university.domain.Student; import com.example.univ
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摘要：Entity: package com.example.university.domain; import javax.persistence.*; import java.util.ArrayList; import java.util.List; /** * JPA Entity represe
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摘要：All features of CrudRepository plus: void flush(); saveAndFlush() delteInBatch() delteAllInBatch() package com.example.university.repo; import com.exa
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摘要：domain/Course.java package com.example.university.domain; import javax.persistence.*; /** * JPA Entity for a Course offered at the University. * <p> *
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摘要：@OneToMany: One Student To Many Courses. @JoinTable(name = "Enrollment"): Join Enrollment table. joinColumns: with use "student_id" to link Student an
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摘要：Repo: package com.example.ec.repo; import com.example.ec.domain.TourRating; import com.example.ec.domain.TourRatingPk; import org.springframework.data
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摘要：package com.example.ec.web; import com.example.ec.domain.Tour; import com.example.ec.domain.TourRating; import com.example.ec.domain.TourRatingPk; imp
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摘要：Controller: package com.example.ec.web; import com.example.ec.domain.Tour; import com.example.ec.domain.TourRating; import com.example.ec.domain.TourR
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摘要：In software, we come across many use cases when we need to have a composite primary key to define an entry in a table. Composite primary keys are keys
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