为什么无法import org.springframework.data 无法解决

Question

我在以下代码包 com.steinko.reactsprinboottutorial.RestfulWebService 中收到“无法解析导入 org.springframework.data”中的错误；

import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
import java.util.List;


@Repository
public interface TodoRepository extends  CrudRepository<Todo, Long>{
    List<Todo> findByName(String Name);
    
}

gradle build.gradle 看起来像

plugins { 
              id 'org.springframework.boot' version '2.3.3.RELEASE'
              id 'io.spring.dependency-management' version '1.0.10.RELEASE'    
      }
apply plugin: 'java'
apply plugin: 'eclipse'

repositories {
    mavenCentral()
    jcenter()
    mavenLocal()
   // maven { url "http://dl.bintray.com/epam/reportportal" }
}

sourceCompatibility = '14'

sourceSets {
    intTest {
        compileClasspath += sourceSets.main.output
        runtimeClasspath += sourceSets.main.output
    }
}

configurations {
    intTestImplementation.extendsFrom implementation
        intTestCompile.extendsFrom testCompile
    intTestRuntimeOnly.extendsFrom runtimeOnly
}

dependencies {
     //implementation 'com.epam.reportportal:logger-java-log4j:5.0.2'
     implementation 'org.springframework.boot:spring-boot-starter-web'
     implementation  'org.springframework.boot:spring-boot-starter-data-jpa'
     implementation 'org.modelmapper:modelmapper:2.3.8'
     // https://mvnrepository.com/artifact/javax.validation/validation-api
     compile group: 'javax.validation', name: 'validation-api', version: '2.0.1.Final'
     implementation 'org.springframework.boot:spring-boot-starter-validation'
     
     runtimeOnly 'org.postgresql:postgresql'
     
     
     // https://mvnrepository.com/artifact/org.testcontainers/testcontainers
     testCompile group: 'org.testcontainers', name: 'testcontainers', version: '1.15.0-rc1'
     testCompile group: 'org.testcontainers', name: 'postgresql', version: '1.15.0-rc1'
     testImplementation 'org.springframework.boot:spring-boot-starter-test' 
     testImplementation 'io.rest-assured:spring-mock-mvc:4.3.1'
     testImplementation  'io.rest-assured:rest-assured-common:4.3.1'
     testImplementation  'org.springframework.boot:spring-boot-starter-data-jpa'
     testCompile group: 'org.modelmapper', name: 'modelmapper', version: '2.3.8'

     
     testImplementation 'com.epam.reportportal:agent-java-junit5:5.0.0-RC-1'
     
     intTestCompile group: 'org.testcontainers', name: 'testcontainers', version: '1.15.0-rc1'
     intTestCompile group: 'org.testcontainers', name: 'postgresql', version: '1.15.0-rc1'
     
     intTestImplementation 'org.springframework.boot:spring-boot-starter-test'
     intTestImplementation 'io.rest-assured:spring-mock-mvc:4.1.2'
     intTestImplementation 'com.epam.reportportal:agent-java-junit5:5.0.0-RC-1'
     intTestRuntimeOnly 'org.postgresql:postgresql'
}

test {
   // testLogging.showStandardStreams = true
    useJUnitPlatform()
   // systemProperty 'junit.jupiter.extensions.autodetection.enabled', true
}


task integrationTest(type: Test) {
    description = 'Runs integration tests.'
    group = 'verification'

    testClassesDirs = sourceSets.intTest.output.classesDirs
    classpath = sourceSets.intTest.runtimeClasspath
    shouldRunAfter test
}

当我运行服务测试时，我得到了一个空指针，用于存储库 TodoServiceTest > shoulCreateTodo() FAILED java.lang.NullPointerException at TodoServiceTest.java:55 TodoServiceTest > shouldDeleteTodo() FAILED java.lang.NullPointerException at TodoServiceTest.java:48

package com.steinko.reactsprinboottutorial.RestfulWebService;

import org.junit.jupiter.api.Test;

import org.junit.jupiter.api.Disabled;

import static org.junit.jupiter.api.Assertions.assertNotNull;

import static org.hamcrest.CoreMatchers.*;
import static org.hamcrest.Matchers.hasProperty;
import static org.hamcrest.collection.IsIterableContainingInAnyOrder.containsInAnyOrder;
import static org.hamcrest.MatcherAssert.assertThat;

import java.util.Date;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Autowired;


public class TodoServiceTest {
    private static final Logger logger = LoggerFactory.getLogger(TodoServiceTest.class);
    
  
    private TodoService service = new TodoService();
    
    
    @Test
    void ShouldExist() {
        assertNotNull (service);
    }
    
    
    @Test
    void shouldDeleteTodo() {
        service.deleteTodo("stein", 1L);     
    }
    
    @Test
    void shoulCreateTodo() {
        Date date = DateFactory.generetDate("01-01-2020 12:00:00"); 
        TodoDto  todo = new TodoDto(1,"Stein","Fix Kjakk", date,false);
        service.createTodo(todo);
        
    }
    
}

服务测试看起来像

package com.steinko.reactsprinboottutorial.RestfulWebService;
    
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.ArrayList;
    import java.util.Date;
    import java.util.List;
    import org.springframework.stereotype.Service;
    import org.springframework.beans.factory.annotation.Autowired;
    
    
    import java.util.Set;
    
    import javax.validation.ConstraintViolation;
    import javax.validation.ConstraintViolationException;
    import javax.validation.Validation;
    import javax.validation.Validator;
    
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    
    
    @Service
    public class TodoService  {
        
        private static final Logger logger = LoggerFactory.getLogger(TodoService.class);
        
        @Autowired
        private TodoRepository repository;
        
        
        
    
        public List<TodoDto> getTodos(String name) { 
            
             List<Todo> todos = repository.findByName(name);
             TodoConverter converter = new TodoConverter(); 
             List<TodoDto> dtos =  converter.convertToDtos(todos);
             return dtos;
        }
    
        public void deleteTodo(String name, Long id) {
            repository.deleteById(id);
            
        }
    
    
    
        public void createTodo(TodoDto dto) {
            TodoConverter converter = new TodoConverter();
            Todo todo = converter.convertToEntity(dto);
            validateEntity(todo);
            repository.save(todo);
        }
        
        
        private void validateEntity(Todo todo) {
            List<String> errorMessage = new ArrayList<>();
            Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
    
            Set<ConstraintViolation<Todo>> constraintViolations = validator.validate(todo);
    
            for (ConstraintViolation<Todo> constraintViolation : constraintViolations) {
                errorMessage.add(constraintViolation.getMessage());
            }
    
            if (errorMessage.size() > 0) {
                throw new ConstraintViolationException(constraintViolations);
            }
        }
    }

如何访问 org.springframework.data 和存储库变量中的对象？

Answer 1

您必须使用 @SpringBootTest 或 @DataJpaTest 对测试类进行注释，以便将存储库初始化并注入您的服务中。 此外，您必须在测试中自动装配您的服务，否则存储库将不会注入您创建的实例中。