ファクトリメソッド 'stringHttpMessageConverter'が例外をスローしました。入れ子にされた例外はjava.lang.NullPointerExceptionです。

Question

私はスタナロンアプリケーションでSpringboot + Spring JPAを使用しています。次のように

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.http.converter.StringHttpMessageConverter]: Factory method 'stringHttpMessageConverter' threw exception; nested exception is java.lang.NullPointerException at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ... 69 more Caused by: java.lang.NullPointerException at java.nio.charset.Charset.put(Unknown Source) at java.nio.charset.Charset.access$200(Unknown Source) at java.nio.charset.Charset$3.run(Unknown Source) at java.nio.charset.Charset$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.nio.charset.Charset.availableCharsets(Unknown Source) at org.springframework.http.converter.StringHttpMessageConverter.(StringHttpMessageConverter.java:67) at org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$StringHttpMessageConverterConfiguration.stringHttpMessageConverter(HttpMessageConvertersAutoConfiguration.java:77) at org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$StringHttpMessageConverterConfiguration$$EnhancerBySpringCGLIB$$4ce1453d.CGLIB$stringHttpMessageConverter$0() at org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$StringHttpMessageConverterConfiguration$$EnhancerBySpringCGLIB$$4ce1453d$$FastClassBySpringCGLIB$$1235f10b.invoke() at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:309) at org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$StringHttpMessageConverterConfiguration$$EnhancerBySpringCGLIB$$4ce1453d.stringHttpMessageConverter() at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ... 70 more

マイConfigクラス：

@Configuration 
@EnableTransactionManagement 
@EnableJpaRepositories(basePackages = { 
     "com.automation.entity" 
}) 
public class DataAccessPersistenceContext { 

    @Bean 
    public DataSource sybaseDataSource() { 
     DataSource sybaseDataSource = new DataSource(); 
     try { 
      sybaseDataSource.setDriverClassName("com.sybase.jdbc4.jdbc.SybDriver"); 
      sybaseDataSource.setUrl("jdbc:sybase:Tds:test.com:29812/TESTSCORE"); 
      sybaseDataSource.setUsername("testUser"); 
      String password = "user"; 
      sybaseDataSource.setPassword(password); 
      sybaseDataSource.setInitialSize(Integer.parseInt("5")); 
      sybaseDataSource.setMaxActive(Integer.parseInt("30")); 
      sybaseDataSource.setMaxIdle(Integer.parseInt("2")); 
      sybaseDataSource.setMinIdle(Integer.parseInt("2")); 
      sybaseDataSource.setValidationQuery("SELECT 1"); 
      sybaseDataSource.setTestOnBorrow(Boolean.parseBoolean("true")); 
      sybaseDataSource.setTestWhileIdle(Boolean.parseBoolean("true")); 
     } catch (NumberFormatException e) { 
      // log.error("Exception in CoreLocalConfig. 
      // NumberFormatException:"+e); 
     } catch (Exception e) { 
      // log.error("Exception in CoreLocalConfig. Exception:"+e); 
     } 
     return sybaseDataSource; 
    } 

    @Bean 
    @Qualifier("entityManagerFactory") 
    LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) { 
     LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean(); 
     entityManagerFactoryBean.setDataSource(dataSource); 
     entityManagerFactoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter()); 
     entityManagerFactoryBean.setPackagesToScan("com.automation.entity"); 

     Properties jpaProperties = new Properties(); 

     //Configures the used database dialect. This allows Hibernate to create SQL 
     //that is optimized for the used database. 
     jpaProperties.put("hibernate.dialect", "org.hibernate.dialect.Sybase11Dialect"); 

     //Specifies the action that is invoked to the database when the Hibernate 
     //SessionFactory is created or closed. 
     jpaProperties.put("hibernate.hbm2ddl.auto", "create-drop"); 

     //Configures the naming strategy that is used when Hibernate creates 
     //new database objects and schema elements 
     jpaProperties.put("hibernate.ejb.naming_strategy", "org.hibernate.cfg.ImprovedNamingStrategy"); 

     //If the value of this property is true, Hibernate writes all SQL 
     //statements to the console. 
     jpaProperties.put("hibernate.show_sql", "true"); 

     //If the value of this property is true, Hibernate will format the SQL 
     //that is written to the console. 
     jpaProperties.put("hibernate.format_sql", "true"); 

     entityManagerFactoryBean.setJpaProperties(jpaProperties); 

     return entityManagerFactoryBean; 
    } 

    @Bean 
    JpaTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) { 
     JpaTransactionManager transactionManager = new JpaTransactionManager(); 
     transactionManager.setEntityManagerFactory(entityManagerFactory); 
     return transactionManager; 
    } 
} 

はあなたが私はこの問題を解決するために助けてくださいことができますが、私は次のエラーをgeetingのですか？

Answer 1

私は