如何配置彈簧mvc 4與休眠和Jpa使用java配置

Question

我試圖連接spring-mvc 4和休眠與jpa使用java配置，但它不工作可以請告訴我錯誤或指導我與新的配置設置

第一配置類是 -

package com.codeoxy.web.config.servlet3; 

    import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer; 

import com.codeoxy.web.config.SpringWebConfig; 

public class MyWebInitializer extends 
    AbstractAnnotationConfigDispatcherServletInitializer { 

    @Override 
    protected Class<?>[] getServletConfigClasses() { 
     return new Class[] { SpringWebConfig.class }; 
    } 

    @Override 
    protected String[] getServletMappings() { 
     return new String[] { "/" }; 
} 

    @Override 
    protected Class<?>[] getRootConfigClasses() { 
     return null; 
    } 

    } 

和用於彈簧的第二類是以下

package com.codeoxy.web.config; 

import org.springframework.context.annotation.Bean; 
import org.springframework.context.annotation.ComponentScan; 
import org.springframework.context.annotation.Configuration; 
import org.springframework.web.servlet.config.annotation.EnableWebMvc; 
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; 
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; 
import org.springframework.web.servlet.view.InternalResourceViewResolver; 
import org.springframework.web.servlet.view.JstlView; 

    @EnableWebMvc 
    @Configuration 
@ComponentScan({ "com.codeoxy.web" }) 
public class SpringWebConfig extends WebMvcConfigurerAdapter { 

@Override 
public void addResourceHandlers(ResourceHandlerRegistry registry) { 
    registry.addResourceHandler("/resources/**").addResourceLocations("/resources/"); 
} 

@Bean 
public InternalResourceViewResolver viewResolver() { 
    InternalResourceViewResolver viewResolver = new InternalResourceViewResolver(); 
    viewResolver.setViewClass(JstlView.class); 
    viewResolver.setPrefix("/WEB-INF/views/jsp/"); 
    viewResolver.setSuffix(".jsp"); 
    return viewResolver; 
    } 

    } 

和JPA配置文件是

package com.codeoxy.web.config; 

    import java.util.Properties; 

    import javax.persistence.EntityManagerFactory; 
    import javax.sql.DataSource; 

import org.springframework.context.annotation.Bean; 
import org.springframework.context.annotation.Configuration; 
import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor; 
import org.springframework.jdbc.datasource.DriverManagerDataSource; 
import org.springframework.orm.jpa.JpaTransactionManager; 
import org.springframework.orm.jpa.JpaVendorAdapter; 
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean; 
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter; 
import org.springframework.transaction.PlatformTransactionManager; 
import org.springframework.transaction.annotation.EnableTransactionManagement; 

@Configuration 
@EnableTransactionManagement 
public class PersistenceJPAConfig{ 

@Bean 
public LocalContainerEntityManagerFactoryBean entityManagerFactory() { 
    LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean(); 
    em.setDataSource(dataSource()); 
    em.setPackagesToScan(new String[] { "org.baeldung.persistence.model" }); 

    JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter(); 
    em.setJpaVendorAdapter(vendorAdapter); 
    em.setJpaProperties(additionalProperties()); 

    return em; 
    } 

    @Bean 
    public DataSource dataSource(){ 
    DriverManagerDataSource dataSource = new DriverManagerDataSource(); 
    dataSource.setDriverClassName("com.mysql.jdbc.Driver"); 
    dataSource.setUrl("jdbc:mysql://localhost:3306/fitnestracker"); 
    dataSource.setUsername("root"); 
    dataSource.setPassword(""); 
    return dataSource; 
    } 

    @Bean 
    public PlatformTransactionManager transactionManager(EntityManagerFactory emf){ 
    JpaTransactionManager transactionManager = new JpaTransactionManager(); 
    transactionManager.setEntityManagerFactory(emf); 

    return transactionManager; 
    } 

    @Bean 
    public PersistenceExceptionTranslationPostProcessor exceptionTranslation(){ 
    return new PersistenceExceptionTranslationPostProcessor(); 
    } 

    Properties additionalProperties() { 
    Properties properties = new Properties(); 
    properties.setProperty("hibernate.hbm2ddl.auto", "create-drop"); 
    properties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect"); 
    return properties; 
    } 
    } 

Can有人能幫助我，謝謝。

Answer 1

您的setPackagesToScan是錯誤的。請重新安裝正確的插件。此外，您還沒有提供錯誤日誌，沒有它就很難回答。

em.setPackagesToScan（new String [] {「org.baeldung.persistence.model」}）;