我对ClassCaseException有问题。我在Spring批处理中创建了XStreamItemEventReader,以读取xml并将结果写入数据库。读者我正在阅读应该解析为该类的xml:
@Data
@AllArgsConstructor
@NoArgsConstructor
public class EmployeeDTO {
private Long id;
private String firstName;
private String surname;
private String email;
private Integer age;
}
我的xml项目读取器是在该类中创建的:
public final class XMLReader<T> extends StaxEventItemReader<T> implements ClosableItemReader<T> {
public XMLReader(Map<String, Object> parameters) {
setResource(new FileSystemResource((File) parameters.get(RESOURCE)));
setFragmentRootElementName((String) parameters.get(ROOT_TAG));
Map<String, String> aliases = (Map<String, String>) parameters.get(ALIASES_MAP);
XStreamMarshaller marshaller = new XStreamMarshaller();
marshaller.setAliases(aliases);
setUnmarshaller(marshaller);
setStrict(false);
open(new ExecutionContext());
}
然后是XMLReader在该类中的所有员工正在阅读的内容
public class EmployeeReader implements ItemReader<EmployeeDTO> {
private final JobImportReaderFactory jobImportReaderFactory;
private ClosableItemReader<EmployeeDTO> itemReader;
public EmployeeReader(JobImportReaderFactory jobImportReaderFactory, JobFileRepository jobFileRepository) {
this.jobImportReaderFactory = jobImportReaderFactory;
this.jobFileRepository = jobFileRepository;
}
@BeforeStep
public void setup() throws IOException {
// this factory gives me XMLReader instance
itemReader = jobImportReaderFactory.getItemReader(jobEnum, readerParameters, EmployeeDTO.class);
}
@Override
public EmployeeDTO read() throws Exception {
log.debug("read()");
return itemReader.read();
}
}
我的例外情况如下:
java.lang.ClassCastException:不能将com.kk.tutorial.domain.dtos.EmployeeDTO类强制转换为com.kk.tutorial.domain.dtos.EmployeeDTO类(com.kk.tutorial.domain.dtos.EmployeeDTO为在加载器'app'的未命名模块中; com.kk.tutorial.domain.dtos.EmployeeDTO在加载器org.springframework.boot.devtools.restart.classloader.RestartClassLoader @ 24eb3739的未命名模块中
我尝试在EmployeeDTO中实现Serializable,但是它不起作用。我知道这是ClassLoader的问题,但我不知道如何处理ClassLoader以及如何通过另一个ClassLoader将value从itemReader.read()传递给EmployeeDTO。您知道如何修理该铸件吗?
答案 0 :(得分:1)
从pom.xml中删除spring-boot-devtools修复了一个问题