pring3、hibernate4、JPA整合（包括很久未解决的事务管理问题）

Spring3、hibernate4、JPA配置在自己的电脑上试了下，没有找到事务管理解决的办法，今天图书馆看书，参考书里面的配置解决了事务管理问题，在此记录，顺便与诸君共享

首先是applicationContext的配置文件：

http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd  
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd  
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd  
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

   
            destroy-method="close">
       
                    value="jdbc:mysql://localhost:3306/zjgcmcc?useUnicode=true&characterEncoding=utf-8" />
       
       
       
       
       
       
       
   
  
   
   
            class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" destroy-method="destroy">
       
       
       
           
               
               
           
       
   
   
   
       
   
   
   
       
           
           
           
           
           
       
   
   
                    expression="execution(* zjgcmcc.web.service.*.*(..))" />
       
   

   
   

Dao类、Service类、Controller类及其他bean配置在一个单独的beans.xml文件中：

http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
   
   
   
   
       
   

此处是persistence.xml的文件配置：

http://java.sun.com/xml/ns/persistence" version="1.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" >
   
        org.hibernate.ejb.HibernatePersistence
       
        zjgcmcc.web.entity.Order
        zjgcmcc.web.entity.BaseEntity
        zjgcmcc.web.entity.TB_Dept
        zjgcmcc.web.entity.TB_User
        zjgcmcc.web.entity.TB_Role

       
           
           
           
           
           
           
           
       
   

来看看通用的Dao类的写法：

接口：IBaseDao.java

package zjgcmcc.web.dao;

import java.io.Serializable;
import java.util.List;
public interface IBaseDao {
    public T findById(T t,ID id);
    public List query(String sql,T t);
    public int add(T object);
    public int update(T object);
    public int update(String sql);
    public int delete(T object);
    public void flush();
}

Dao的接口实现类：BaseDao.java

package zjgcmcc.web.dao.impl;

import java.io.Serializable;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import zjgcmcc.web.dao.IBaseDao;

public class BaseDao implements IBaseDao {
    @PersistenceContext
    private EntityManager entityManager;

    @Override
    public T findById(T t, ID id) {
        // TODO Auto-generated method stub
        T find = (T) this.entityManager.find(t.getClass(), id);
        return find;
    }

    @Override
    public List query(String sql, T t) {
        // TODO Auto-generated method stub
        return this.entityManager.createNativeQuery(sql,t.getClass())
                .getResultList();
    }

    @Override
    public int add(T object) {
        // TODO Auto-generated method stub
        int result = 1;
        try {
            this.entityManager.persist(object);
        } catch (Exception e) {
            result = 0;
        }
        return result;

    }

    @Override
    public int update(T object) {
        // TODO Auto-generated method stub

        int result = 1;
        try {
            this.entityManager.merge(object);
        } catch (Exception e) {
            result = 0;
        }
        return result;
    }

    @Override
    public int update(String sql) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public int delete(T object) {
        // TODO Auto-generated method stub
        try {
            this.entityManager.remove(object);
            return 1;
        } catch (Exception e) {
            return 0;
        }

    }

    @Override
    public void flush() {
        // TODO Auto-generated method stub
        this.entityManager.flush();
    }
}

接下来是一个业务层Service类：UserService.java

package zjgcmcc.web.service;
import zjgcmcc.web.dao.impl.BaseDao;
import zjgcmcc.web.entity.TB_User;

public class UserService {
    private BaseDao userDao;
   
    public BaseDao getUserDao() {
        return userDao;
    }
    public void setUserDao(BaseDao userDao) {
        this.userDao = userDao;
    }

    public void addUser(TB_User user){
        this.userDao.add(user);
    }
}
最后是一个单元测试：UserJPATest.java

package test;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import zjgcmcc.web.entity.TB_Dept;
import zjgcmcc.web.entity.TB_Role;
import zjgcmcc.web.entity.TB_User;
import zjgcmcc.web.service.UserService;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class UserJPATest {
    @Autowired private UserService userService;
    @Autowired EntityManagerFactory emf;
    @Autowired JpaTransactionManager transactionManager;
   
    @Test public void test(){
        TB_Dept dept=new TB_Dept();
        TB_Role role=new TB_Role();
        TB_User user=new TB_User();
       
        dept.setD_id("03");
        dept.setD_name("第三分中心");
        role.setR_id("0301");
        role.setR_name("主任");
        role.setR_dept(dept);
        List roles=new ArrayList();
        roles.add(role);
        user.setU_id("030100");
        user.setU_name("A");
        user.setU_roles(roles);
        System.out.println((userService==null));
        this.userService.addUser(user);
    }
}

三个Entity类：

TB_Dept.java:

package zjgcmcc.web.entity;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

@Entity
@Table(name="tb_dept")
public class TB_Dept extends BaseEntity{
    private static final long serialVersionUID = -1844975459250411764L;
    @Id
    @Column(name="d_id")
   
    private String d_id;
    @Column(name="d_name")
    private String d_name;
    @Column(name="d_level",nullable=false)
    private int d_level;

//getter setter略….   
}

TB_Role.java:

package zjgcmcc.web.entity;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.PrimaryKeyJoinColumn;
import javax.persistence.Table;

@Entity
@Table(name="tb_role")
public class TB_Role extends BaseEntity{
    private static final long serialVersionUID = 3618646459702991344L;
    @Id
    @Column(name="r_id")
    private String r_id;
    @Column(name="r_name")
    private String r_name;
   
    @ManyToOne(fetch=FetchType.EAGER,cascade={CascadeType.PERSIST})
    @JoinColumn(name="dept_id",unique=true)
    private TB_Dept r_dept;
//getter setter略….
}

TB_User.java:

package zjgcmcc.web.entity;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;

import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.OneToMany;
import javax.persistence.Table;

@Entity
@Table(name="tb_user")
public class TB_User extends BaseEntity {
    private static final long serialVersionUID = 7665797019787902828L;
    @Id
    @Column(name="u_id")
    private String u_id;
    @Column(name="u_name")
    private String u_name;
    //tb_user与tb_dept的多对多关系
    @ManyToMany(fetch=FetchType.EAGER,cascade={CascadeType.PERSIST})
    @JoinTable(
                name="tb_user_role",
                joinColumns=@JoinColumn(name="user_id",referencedColumnName="u_id"),
                inverseJoinColumns=@JoinColumn(name="role_id",referencedColumnName="r_id")
                )
    private List u_roles=new ArrayList();
   
    @Column(name="u_phone")
    private String u_phone;
    @Column(name="u_passwd")
    private String u_passwd;

//getter setter略….

}

红字部分在配置的时候容易被忽略或配置错误，具体为何配置尚未研究，有达人了解欢迎指点一二 。