title: 如何单独使用spring data jpa

引用pom文件:

                 
      
       org.springframework.data
                  
      
       spring-data-jpa
                  
      
       2.1.5.RELEASE
              
             
                 
      
       org.hibernate
                  
      
       hibernate-core
                  
      
       5.3.5.Final
              
             
                 
      
       org.hibernate
                  
      
       hibernate-c3p0
                  
      
       5.3.5.Final
              
             
             
                 
      
       mysql
                  
      
       mysql-connector-java
                  
      
       5.1.47
              
             
                 
      
       com.mchange
                  
      
       c3p0
                  
      
       0.9.5.2
              
     

编写配置类:

package com.config;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;import org.springframework.data.jpa.repository.config.EnableJpaRepositories;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 javax.persistence.EntityManagerFactory;import java.util.Properties;/** * @author Zhai * 2019/04/02 15:10 */@Configuration@ComponentScan(basePackages = {"com"})// 指定Repository所在的包@EnableJpaRepositories(basePackages = {"com.domain"})public class JpaConfig {    // 名字必须是entityManagerFactory,或者把@bean中name属性设置为entityManagerFactory    @Bean    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {        LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();        // 设置数据库(如果在hibernate中配置了连接池,则不需要设置)//        em.setDataSource(dataSource());        // 指定Entity所在的包        em.setPackagesToScan("com.domain");        JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();        em.setJpaVendorAdapter(vendorAdapter);        // 配置属性        Properties properties = new Properties();        properties.setProperty("hibernate.connection.driver_class", "com.mysql.jdbc.Driver");        properties.setProperty("hibernate.connection.url", "jdbc:mysql://10.8.3.38:3306/test");        properties.setProperty("hibernate.connection.username", "root");        properties.setProperty("hibernate.connection.password", "root");        properties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");        properties.setProperty("hibernate.connection.provider_class", "org.hibernate.connection.C3P0ConnectionProvider");        properties.setProperty("hibernate.c3p0.min_size", "1");        properties.setProperty("hibernate.c3p0.max_size", "10");        properties.setProperty("hibernate.hbm2ddl.auto", "create");        properties.setProperty("hibernate.show_sql", "true");        properties.setProperty("format_sql", "true");        em.setJpaProperties(properties);        return em;    }    // 名字必须是transactionManager,或者把@bean中name属性设置为transactionManager    @Bean    public PlatformTransactionManager transactionManager(            EntityManagerFactory emf) {        JpaTransactionManager transactionManager = new JpaTransactionManager();        transactionManager.setEntityManagerFactory(emf);        return transactionManager;    }}

测试代码:

package com;import com.config.JpaConfig;import com.domain.Student;import com.domain.StudentRepository;import org.springframework.context.ApplicationContext;import org.springframework.context.annotation.AnnotationConfigApplicationContext;import java.util.List;/** * @author Zhai * 2019/04/02 14:27 */public class JpaTest {    public static void main(String[] args) {        ApplicationContext context = new AnnotationConfigApplicationContext(JpaConfig.class);        // 获取repository        StudentRepository studentRepository = context.getBean(StudentRepository.class);        Student student1 = new Student();        studentRepository.save(student1);        List
     
       students = studentRepository.findAll();        System.out.println(students);    }}