基于Eclipse Maven的Spring4/Spring-MVC/Hibernate4整合之三：hibernate4泛型dao的应用

   首先将aop代理设置为CGLib动态代理方式，在spring-hibernate.xml里面加上：

<aop:aspectj-autoproxy  proxy-target-class="true"/>

   一般比较理想的做法，将dao基类定义为泛型，并带有泛型的接口，在controller/service里面用接口引用，在xml里面配置真正实现的泛型dao类。

   1、先定义支持泛型的dao实现类及其接口：

        public class HibernateEntityDao<T> extends HibernateGenericDao implements
        IHibernateEntityDao<T>  ...

   2、比如现在要做Entity为TaUser的dao实现类，很简单：就指定entity的类型即可：

public class HibernateUserDao extends HibernateEntityDao<TaUser> {}

  3、个人倾向于dao在spring xml里面配置而不用@Repository注解，因为以后改逻辑什么的，直接在xml里面将实现类指向新的类即可。这在spring-dao.xml里面配置：

<bean id="hibernateUserDao" class="com.freestyle.test.hibernate.dao.HibernateUserDao" />

  4、在controller里面测试,下面代码中，用@Resource方式注入xml里面配置好的hibernateUserDao给接口mvDao：

package com.freestyle.test.hibernate.controller;import java.sql.SQLException;import java.util.HashMap;import java.util.Map;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.context.annotation.DependsOn;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.servlet.ModelAndView;import com.freestyle.common.hibernate.dao.interfaces.IHibernateEntityDao;import com.freestyle.test.hibernate.entities.TaUser;@Controller@RequestMapping("/hibernate")@DependsOn({"hibernateUserDao"})public class HibernateController implements org.springframework.web.servlet.mvc.Controller{//@Resource(name="hibernateUserDao")//private HibernateUserDao lvDao;//@Resource(name="hibernateUserDao")@Resource(name="hibernateUserDao")protected IHibernateEntityDao<TaUser> mvDao;@RequestMapping("/test")public ModelAndView test(@RequestParam(value = "name", defaultValue = "World") String name)throws SQLException {System.out.println("Hello " + name);Map<String, Object> lvMap= new HashMap<String, Object>();/*TaUser lvUser= lvDao.getUser("dgmislrh");if (lvUser!=null){System.out.println(lvUser.getFaName());}*/TaUser lvUser=mvDao.get(name);if (lvUser!=null){System.out.println(lvUser.getFaName());lvMap.put("userName", lvUser.getFaName());}return new ModelAndView("/hello", lvMap);}public ModelAndView handleRequest(HttpServletRequest request,HttpServletResponse response) throws Exception {System.out.println(request.getParameterMap().toString());return null;}}

   启动tomcat调试，在浏览器上输入http://localhost/gpchat/hibernate/test?name=dgmislrh，则在控制台显示日志：

Hibernate:     select        tauser0_.fa_login as fa_login1_0_0_,        tauser0_.fa_email as fa_email2_0_0_,        tauser0_.fa_line as fa_line3_0_0_,        tauser0_.fa_manage_by as fa_manag4_0_0_,        tauser0_.fa_name as fa_name5_0_0_,        tauser0_.fa_passwd as fa_passw6_0_0_,        tauser0_.fa_plant as fa_plant7_0_0_,        tauser0_.fa_remark as fa_remar8_0_0_,        tauser0_.fa_role as fa_role9_0_0_,        tauser0_.fa_status as fa_stat10_0_0_,        tauser0_.fa_type as fa_type11_0_0_     from        ta_user tauser0_     where        tauser0_.fa_login=?17:04:29,606 TRACE BasicBinder:81 - binding parameter [1] as [VARCHAR] - [dgmislrh]TaUser entity created.17:04:29,611 TRACE BasicExtractor:78 - extracted value ([fa_email2_0_0_] : [VARCHAR]) - [[e-mail]]17:04:29,611 TRACE BasicExtractor:78 - extracted value ([fa_line3_0_0_] : [VARCHAR]) - [*]17:04:29,611 TRACE BasicExtractor:68 - extracted value ([fa_manag4_0_0_] : [VARCHAR]) - [null]17:04:29,611 TRACE BasicExtractor:78 - extracted value ([fa_name5_0_0_] : [VARCHAR]) - [陈大文]17:04:29,612 TRACE BasicExtractor:78 - extracted value ([fa_passw6_0_0_] : [VARCHAR]) - [389468f83cb96feafa750a8e5bae5f731a59f031]17:04:29,612 TRACE BasicExtractor:78 - extracted value ([fa_plant7_0_0_] : [VARCHAR]) - [DG]17:04:29,612 TRACE BasicExtractor:78 - extracted value ([fa_remar8_0_0_] : [VARCHAR]) - []17:04:29,612 TRACE BasicExtractor:78 - extracted value ([fa_role9_0_0_] : [VARCHAR]) - [NA]17:04:29,612 TRACE BasicExtractor:78 - extracted value ([fa_stat10_0_0_] : [VARCHAR]) - [A]17:04:29,612 TRACE BasicExtractor:78 - extracted value ([fa_type11_0_0_] : [VARCHAR]) - [A]陈大文