我正在开发 Spring Boot + Batch 项目，并从xls文件中读取数据，而在读取数据时却出现错误。
我已经添加了xstream版本1.4.11.1和 Spring OXM 依赖性，它给出了错误。引导版本为2.1.1.RELEASE。
错误：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerItemReader' defined in class path resource [com/example/config/JobConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.item.xml.StaxEventItemReader]: Factory method 'customerItemReader' threw exception; nested exception is java.lang.NoClassDefFoundError: com/thoughtworks/xstream/core/DefaultConverterLookup
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:456) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1288) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863) ~[spring-context-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) ~[spring-context-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.1.RELEASE.jar:2.1.1.RELEASE]
at com.example.ReadingXmlApplication.main(ReadingXmlApplication.java:12) [classes/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.batch.item.xml.StaxEventItemReader]: Factory method 'customerItemReader' threw exception; nested exception is java.lang.NoClassDefFoundError: com/thoughtworks/xstream/core/DefaultConverterLookup
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
... 18 common frames omitted
Caused by: java.lang.NoClassDefFoundError: com/thoughtworks/xstream/core/DefaultConverterLookup
at org.springframework.oxm.xstream.XStreamMarshaller.<init>(XStreamMarshaller.java:140) ~[spring-oxm-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at com.example.config.JobConfiguration.customerItemReader(JobConfiguration.java:33) ~[classes/:na]
at com.example.config.JobConfiguration$$EnhancerBySpringCGLIB$$5c5d7e6f.CGLIB$customerItemReader$2(<generated>) ~[classes/:na]
at com.example.config.JobConfiguration$$EnhancerBySpringCGLIB$$5c5d7e6f$$FastClassBySpringCGLIB$$142cc440.invoke(<generated>) ~[classes/:na]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.1.3.RELEASE.jar:5.1.3.RELEASE]
at com.example.config.JobConfiguration$$EnhancerBySpringCGLIB$$5c5d7e6f.customerItemReader(<generated>) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_162]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_162]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_162]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_162]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.1.3.RELEASE.jar:5.1.3.RELEASE]
... 19 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.thoughtworks.xstream.core.DefaultConverterLookup
at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.8.0_162]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_162]
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[na:1.8.0_162]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_162]
... 31 common frames omitted
pom.xml
<dependencies>
<!-- Spring Starter Batch -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-batch</artifactId>
</dependency>
<!-- Spring OXM -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
</dependency>
<!-- Spring Starter JDBC -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<!-- H2 -->
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<!-- MYSQL -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<!-- XSTREAM -->
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.11.1</version>
</dependency>
<!-- Lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.2</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.batch</groupId>
<artifactId>spring-batch-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
JobConfiguration.java
@Configuration
public class JobConfiguration {
@Autowired
private JobBuilderFactory jobBuilderFactory;
@Autowired
private StepBuilderFactory stepBuilderFactory;
@Bean
public StaxEventItemReader<Customer> customerItemReader(){
Map<String, Class> aliases = new HashMap<>();
aliases.put("customer", Customer.class);
XStreamMarshaller ummarshaller = new XStreamMarshaller();
ummarshaller.setAliases(aliases);
StaxEventItemReader<Customer> reader = new StaxEventItemReader<>();
reader.setResource(new ClassPathResource("/data/customer.xml"));
reader.setFragmentRootElementName("customer");
reader.setUnmarshaller(ummarshaller);
return reader;
}
@Bean
public ItemWriter<Customer> customerItemWriter(){
return items -> {
for (Customer customer : items) {
System.out.println(customer.toString());
}
};
}
@Bean
public Step step1() {
return stepBuilderFactory.get("step1")
.<Customer, Customer>chunk(10)
.reader(customerItemReader())
.writer(customerItemWriter())
.build();
}
@Bean
public Job job() {
return jobBuilderFactory.get("job")
.start(step1())
.build();
}
}
customer.xml
<?xml version="1.0" encoding="UTF-8" ?>
<customers>
<customer>
<id>1</id>
<firstName>John</firstName>
<lastName>Doe</lastName>
<birthdate>10-10-1988 19:43:23</birthdate>
</customer>
<customer>
<id>2</id>
<firstName>James</firstName>
<lastName>Moss</lastName>
<birthdate>01-04-1991 10:20:23</birthdate>
</customer>
<customer>
<id>3</id>
<firstName>Jonie</firstName>
<lastName>Gamble</lastName>
<birthdate>21-07-1982 11:12:13</birthdate>
</customer>
......
答案 0 :(得分：0)
在做同样的事情时，我遇到了同样的问题。
我在mkyong.com找到了一个对我有用的解决方案。
类DefaultConverterLookup属于xstream.jar。并且您需要在pom.xml或您正在使用的任何依赖管理中添加以下依赖。
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.11.1</version>
</dependency>