org.hibernate.LazyInitializationException: 无法初始化代理 - 没有 Session。对于测试用例 JUnit
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【中文标题】org.hibernate.LazyInitializationException: 无法初始化代理 - 没有 Session。对于测试用例 JUnit【英文标题】：org.hibernate.LazyInitializationException: could not initialize proxy - no Session . For a Testcase JUnit 【发布时间】：2017-06-01 10:08:38 【问题描述】：我有两个控制器，如下所示，我一直在尝试为它们编写测试用例，但自从控制器用户 @AuthenticationPrincipal 以来。我很难为他们编写测试用例，并且在运行测试用例时遇到错误。
@ResponseBody
@RequestMapping(value = "/view/id", method = RequestMethod.GET, produces = "application/pdf")
public ResponseEntity renderDocument(@AuthenticationPrincipal Principal principal, @PathVariable("id") Long id)
throws IOException
Journal journal = journalRepository.findOne(id);
Category category = journal.getCategory();
CurrentUser activeUser = (CurrentUser) ((Authentication) principal).getPrincipal();
User user = userRepository.findOne(activeUser.getUser().getId());
List<Subscription> subscriptions = user.getSubscriptions();
Optional<Subscription> subscription = subscriptions.stream()
.filter(s -> s.getCategory().getId().equals(category.getId())).findFirst();
if (subscription.isPresent() || journal.getPublisher().getId().equals(user.getId()))
File file = new File(PublisherController.getFileName(journal.getPublisher().getId(), journal.getUuid()));
InputStream in = new FileInputStream(file);
return ResponseEntity.ok(IOUtils.toByteArray(in));
else
return ResponseEntity.notFound().build();
@RequestMapping(method = RequestMethod.POST, value = "/publisher/publish")
@PreAuthorize("hasRole('PUBLISHER')")
public String handleFileUpload(@RequestParam("name") String name, @RequestParam("category")Long categoryId, @RequestParam("file") MultipartFile file,
RedirectAttributes redirectAttributes, @AuthenticationPrincipal Principal principal)
CurrentUser activeUser = (CurrentUser) ((Authentication) principal).getPrincipal();
Optional<Publisher> publisher = publisherRepository.findByUser(activeUser.getUser());
String uuid = UUID.randomUUID().toString();
File dir = new File(getDirectory(publisher.get().getId()));
createDirectoryIfNotExist(dir);
File f = new File(getFileName(publisher.get().getId(), uuid));
if (!file.isEmpty())
try
BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(f));
FileCopyUtils.copy(file.getInputStream(), stream);
stream.close();
Journal journal = new Journal();
journal.setUuid(uuid);
journal.setName(name);
journalService.publish(publisher.get(), journal, categoryId);
return "redirect:/publisher/browse";
catch (Exception e)
redirectAttributes.addFlashAttribute("message",
"You failed to publish " + name + " => " + e.getMessage());
else
redirectAttributes.addFlashAttribute("message",
"You failed to upload " + name + " because the file was empty");
return "redirect:/publisher/publish";
测试用例是
@Test
@WithMockUser(username = "user1", roles = "USER" )
public void renderDocument() throws Exception
mockMvc.perform(get("/view/id", 1)).andExpect(content().contentType(contentType)).andExpect(status().isOk());
但我收到以下错误：-
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:165)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:286)
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:185)
at com.crossover.trial.journals.model.Publisher_$$_jvst650_0.toString(Publisher_$$_jvst650_0.java)
at org.springframework.web.util.UriComponents.getVariableValueAsString(UriComponents.java:269)
at org.springframework.web.util.UriComponents.expandUriComponent(UriComponents.java:234)
at org.springframework.web.util.HierarchicalUriComponents$FullPathComponent.expand(HierarchicalUriComponents.java:685)
at org.springframework.web.util.HierarchicalUriComponents.expandInternal(HierarchicalUriComponents.java:328)
at org.springframework.web.util.HierarchicalUriComponents.expandInternal(HierarchicalUriComponents.java:47)
at org.springframework.web.util.UriComponents.expand(UriComponents.java:163)
at org.springframework.web.util.UriComponentsBuilder.buildAndExpand(UriComponentsBuilder.java:412)
at org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder.<init>(MockHttpServletRequestBuilder.java:122)
at org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get(MockMvcRequestBuilders.java:55)
at com.crossover.trial.journals.rest.JournalServiceTest.renderDocument(JournalServiceTest.java:187)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
JournalServiceTest.java
package com.crossover.trial.journals.rest;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.fail;
import static org.springframework.security.test.web.servlet.setup.SecurityMockMvcConfigurers.springSecurity;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
import static org.springframework.test.web.servlet.setup.MockMvcBuilders.webAppContextSetup;
import java.nio.charset.Charset;
import java.util.List;
import java.util.Optional;
import com.crossover.trial.journals.Application;
import com.crossover.trial.journals.model.Journal;
import com.crossover.trial.journals.model.Publisher;
import com.crossover.trial.journals.model.User;
import com.crossover.trial.journals.repository.PublisherRepository;
import com.crossover.trial.journals.service.JournalService;
import com.crossover.trial.journals.service.ServiceException;
import com.crossover.trial.journals.service.UserService;
import org.junit.Before;
import org.junit.FixMethodOrder;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.MethodSorters;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.SpringApplicationConfiguration;
import org.springframework.http.MediaType;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.web.context.WebApplicationContext;
@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = Application.class)
@WebAppConfiguration
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
public class JournalServiceTest
private final static String NEW_JOURNAL_NAME = "New Journal";
@Autowired
private JournalService journalService;
@Autowired
private UserService userService;
@Autowired
private PublisherRepository publisherRepository;
private MockMvc mockMvc;
@Autowired
private WebApplicationContext webApplicationContext;
@Before
public void setup() throws Exception
this.mockMvc = webAppContextSetup(webApplicationContext).apply(springSecurity()).build();
@Test
public void browseSubscribedUser()
List<Journal> journals = journalService.listAll(getUser("user1"));
assertNotNull(journals);
assertEquals(1, journals.size());
assertEquals(new Long(1), journals.get(0).getId());
assertEquals("Medicine", journals.get(0).getName());
assertEquals(new Long(1), journals.get(0).getPublisher().getId());
assertNotNull(journals.get(0).getPublishDate());
@Test
public void browseUnSubscribedUser()
List<Journal> journals = journalService.listAll(getUser("user2"));
assertEquals(0, journals.size());
@Test
public void listPublisher()
User user = getUser("publisher1");
Optional<Publisher> p = publisherRepository.findByUser(user);
List<Journal> journals = journalService.publisherList(p.get());
assertEquals(2, journals.size());
assertEquals(new Long(1), journals.get(0).getId());
assertEquals(new Long(2), journals.get(1).getId());
assertEquals("Medicine", journals.get(0).getName());
assertEquals("Test Journal", journals.get(1).getName());
journals.stream().forEach(j -> assertNotNull(j.getPublishDate()));
journals.stream().forEach(j -> assertEquals(new Long(1), j.getPublisher().getId()));
@Test(expected = ServiceException.class)
public void publishFail() throws ServiceException
User user = getUser("publisher2");
Optional<Publisher> p = publisherRepository.findByUser(user);
Journal journal = new Journal();
journal.setName("New Journal");
journalService.publish(p.get(), journal, 1L);
@Test(expected = ServiceException.class)
public void publishFail2() throws ServiceException
User user = getUser("publisher2");
Optional<Publisher> p = publisherRepository.findByUser(user);
Journal journal = new Journal();
journal.setName("New Journal");
journalService.publish(p.get(), journal, 150L);
@Test()
public void publishSuccess()
User user = getUser("publisher2");
Optional<Publisher> p = publisherRepository.findByUser(user);
Journal journal = new Journal();
journal.setName(NEW_JOURNAL_NAME);
journal.setUuid("SOME_EXTERNAL_ID");
try
journalService.publish(p.get(), journal, 3L);
catch (ServiceException e)
fail(e.getMessage());
List<Journal> journals = journalService.listAll(getUser("user1"));
assertEquals(2, journals.size());
journals = journalService.publisherList(p.get());
assertEquals(2, journals.size());
assertEquals(new Long(3), journals.get(0).getId());
assertEquals(new Long(4), journals.get(1).getId());
assertEquals("Health", journals.get(0).getName());
assertEquals(NEW_JOURNAL_NAME, journals.get(1).getName());
journals.stream().forEach(j -> assertNotNull(j.getPublishDate()));
journals.stream().forEach(j -> assertEquals(new Long(2), j.getPublisher().getId()));
@Test(expected = ServiceException.class)
public void unPublishFail()
User user = getUser("publisher1");
Optional<Publisher> p = publisherRepository.findByUser(user);
journalService.unPublish(p.get(), 4L);
@Test(expected = ServiceException.class)
public void unPublishFail2()
User user = getUser("publisher1");
Optional<Publisher> p = publisherRepository.findByUser(user);
journalService.unPublish(p.get(), 100L);
@Test
public void unPublishSuccess()
User user = getUser("publisher2");
Optional<Publisher> p = publisherRepository.findByUser(user);
journalService.unPublish(p.get(), 4L);
List<Journal> journals = journalService.publisherList(p.get());
assertEquals(1, journals.size());
journals = journalService.listAll(getUser("user1"));
assertEquals(1, journals.size());
@Test
public void renderDocument() throws Exception
mockMvc.perform(get("/view/id", "1"));
protected User getUser(String name)
Optional<User> user = userService.getUserByLoginName(name);
if (!user.isPresent())
fail("user1 doesn't exist");
return user.get();
【问题讨论】：
能分享一下JournalServiceTest.java文件的代码吗，请注明行号: :187 请检查。我已经上传了整个 JournalServiceTest.java 的代码 【参考方案1】：您已从数据库中获取对象，如下所示，
期刊杂志 = journalRepository.findOne(id);
类别类别 = journal.getCategory();
还有你用过的地方
category.getId()
澄清：当您从数据库中获取日志对象时，只有日志对象与代理类别对象一起获取，而不是实际的类别对象。因此，当您尝试使用日志对象获取类别时，它会尝试使用实际类别对象初始化代理类别对象，这需要调用 db。
但是由于日志对象可能与会话分离，所以它说没有会话。
解决办法：你有代理对象，解包代理对象的方法有很多
categoryProxyObj=entityManager.unwrap(SessionImplementor.class).getPersistenceContext().unproxy(categoryProxyObj);
categoryProxyObj=((SessionImplementor)session).getPersistenceContext().unproxy(categoryProxyObj);
Hibernate.initialize(categoryProxyObj);
if (categoryProxyObj instanceof HibernateProxy)
categoryProxyObj=((HibernateProxy)categoryProxyObj).getHibernateLazyInitializer().getImplementation();
你喜欢哪种方法，你可以使用。
或者，如果您不需要类别对象而只需要类别 ID，则在 Journal 中
使用
private Category category;
@OneToOne(fetch=FetchType.LAZY, optional=false)
public Category getCategory()
return this.category;
代替
@OneToOne(fetch=FetchType.LAZY, optional=false)
private Category category;
【讨论】：
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