Spring + SpringMVC + Druid + JPA(Hibernate impl) 给你一个稳妥的后端解决方案

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
          http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">
    <!--Spring mvc -->
    <servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>
                classpath:spring-mvc-base.xml
                classpath:spring-mvc-beans.xml
                classpath:spring-hibernate-beans.xml
            </param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>

    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--Druid 数据库连接池监控-->
    <servlet>
        <servlet-name>DruidStatView</servlet-name>
        <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>DruidStatView</servlet-name>
        <url-pattern>/druid/*</url-pattern>
    </servlet-mapping>
</web-app>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.rambo</groupId>
    <artifactId>sdh</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>sdh</name>
    <description>spring mvc + Druid + hibernate</description>

    <dependencies>
        <!--spring mvc-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.3.RELEASE</version>
        </dependency>

        <!-- Spring-orm -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>4.3.3.RELEASE</version>
        </dependency>

        <!-- Spring AOP 动态代理 -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.9</version>
        </dependency>

        <!-- Hibernate-core -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.3.1.Final</version>
        </dependency>

        <!-- Druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.26</version>
        </dependency>

        <!--mysql 数据驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.38</version>
        </dependency>

        <!--日志-->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version><!--2012.05 最后版本-->
        </dependency>
    </dependencies>
    <build>
        <finalName>sdh</finalName>
        <plugins>
            <plugin>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>9.2.11.v20150529</version>
                <configuration>
                    <jvmArgs>-XX:PermSize=256M -XX:MaxPermSize=1024M</jvmArgs>
                    <webApp>
                        <contextPath>/${project.name}</contextPath>
                    </webApp>
                    <httpConnector>
                        <port>4040</port>
                    </httpConnector>
                    <stopKey>foo</stopKey>
                    <stopPort>9998</stopPort>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

@MappedSuperclass
public class BasePO implements Serializable {
    @Id
    @Column(length = 32, nullable = true)
    @GeneratedValue(generator = "uuid")
    @GenericGenerator(name = "uuid", strategy = "uuid")
    private String uuid;

    @Column(updatable = false)
    private Date createDate;

    private Date modifyDate;

    ....getter/setter
}

@Repository
public class BaseDaoImpl<T, PK extends Serializable> implements BaseDao<T, PK> {

    private Class<T> entityClass;
    @Resource
    protected SessionFactory sessionFactory;

    public BaseDaoImpl() {
        this.entityClass = null;
        Class<?> c = getClass();
        Type type = c.getGenericSuperclass(); //反射获取超类
        if (type instanceof ParameterizedType) {
            Type[] parameterizedType = ((ParameterizedType) type).getActualTypeArguments();
            this.entityClass = (Class<T>) parameterizedType[0];
        }
    }

    protected Session getSession() {
        return sessionFactory.getCurrentSession();
    }

    public T getByKey(PK id) {
        Assert.notNull(id, "id is required");
        return (T) getSession().get(entityClass, id);
    }

    public T add(T entity) {
        Assert.notNull(entity, "entity is required");
        getSession().save(entity);
        return entity;
    }

    public T edit(T entity) {
        Assert.notNull(entity, "entity is required");
        getSession().update(entity);
        return entity;
    }

    public T deleteByKey(PK id) {
        Assert.notNull(id, "id is required");
        T t = (T) getSession().load(entityClass, id);
        getSession().delete(t);
        return t;
    }
}