【Java 新建项目】使用程序对新项目的各个实体 创建Dao、DaoImpl、Service、ServiceImpl层的文件

优化之后的步骤：

1.第一步 生成各层文件夹，并且创建GenericDao.java等基础dao【基础dao中涉及到的包名等自行更改】

2.第二步 生成各个实体对应的Dao等层文件

首先给出基本Dao层代码：【将这些类保存为文件，放在固定的位置】

GenericDao.java

 package com.agen.dao;

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

 import org.hibernate.Criteria;
 import org.hibernate.criterion.Criterion;
 import org.hibernate.criterion.DetachedCriteria;

 import com.github.pagehelper.PageInfo;

 public interface GenericDao<T, PK extends Serializable> {
     /**
      * 查询全部，可以排序
      * @param orderBy
      * @param isAsc
      * @return List<T>
      */
     public List<T> list(Criteria criteria);

     /**
      * 查询全部，可以排序
      * @param orderBy
      * @param isAsc
      * @return List<T>
      */
     public List<T> list(String orderBy, boolean isAsc);

     /**
      * 离线查询
      * @param criteria
      * @return List<T>
      */
     public List<T> list(DetachedCriteria criteria);

     /**
      * 根据Criteria查询条件，获取总数
      * @param criteria
      * @return int
      * @throws SecurityException
      * @throws NoSuchFieldException
      * @throws IllegalAccessException
      * @throws IllegalArgumentException
      */
     public int countAll(Criteria criteria);

     /**
      * 获取总数(默认为entityClass) 即查询总条数
      * @return int
      */
     public int countAll();

     /**
      * 根据I判断是否存在
      * @param id
      * @return boolean
      */
     public boolean exists(PK id);

     /**
      * 保存实体
      * @param t 实体参数
      */
     public void save(T t);

     /**
      * 保存或者更新实体
      * @param t 实体
      */
     public void saveOrUpdate(T t);

     /**
      * 加载实体的通过load方法
      * @param id 实体的id
      * @return 查询出来的实体
      */
     public T load(PK id);

     /**
      * 合并实体
      * @param entity
      */
     public void merge(T entity);

     /**
      * 查找全部
      */
     public List<T> findAll();

     /**
      * 通过get方法加载实体的
      * @param id 实体的id
      * @return 查询出来的实体
      */
     public T get(PK id);

     /**
      * contains
      * @param t 实体
      * @return 是否包含
      */
     public boolean contains(T t);

     /**
      * delete
      * @param t
      * 删除实体
      */
     public void delete(T t);

     /**
      * 根据ID删除数据
      * @param Id 实体id
      * @return 是否删除成功
      */
     public boolean deleteById(PK Id);

     /**
      * 删除所有
      * @param entities 实体的Collection集合
      */
     public void deleteAll(Collection<T> entities);

     /**
      * 执行Hql语句 要求 hql中参数顺序与可变参数 中参数顺序相一致
      * @param hqlString hql
      * @param values 不定参数数组
      */
     public void queryHql(String hqlString, Object... values);

     /**
      * 执行Sql语句(不建议用，影响扩展)
      * @param sqlString sql
      * @param values 不定参数数组
      */
     public void querySql(String sqlString, Object... values);

     /**
      * 根据HQL语句查找唯一实体
      *
      * @param hqlString HQL语句
      * @param values 不定参数的Object数组
      * @return 查询实体
      */
     public T getByHQL(String hqlString, Object... values);

     /**
      * 根据SQL语句查找唯一实体（不建议用，影响扩展）
      * @param sqlString SQL语句
      * @param values 不定参数的Object数组
      * @return 查询实体
      */

     /**
      * 根据HQL语句，得到对应的list
      * @param hqlString HQL语句
      * @param values 不定参数的Object数组
      * @return 查询多个实体的List集合
      */
     public List<T> getListByHQL(String hqlString, Object... values);

     /**
      * 根据SQL语句，得到对应的list（不建议用，影响扩展）
      * @param sqlString HQL语句
      * @param values 不定参数的Object数组
      * @return 查询多个实体的List集合
      */
     public List<T> getListBySQL(String sqlString, Object... values);

     /**
      * refresh 刷新实体，强制与数据库两步 refresh方法应该是数据库的数据更新到本地的person实体中，而不是本地person更新数据到数据库中  也就是执行refresh方法是更新了java代码中变量的数据值
      * @param t 实体
      */
     public void refresh(T t);

     /**
      * update
      * @param t
      * 更新的是数据库中的数据
      */
     public void update(T t);

     /**
      * 根据HQL得到记录数
      * @param hql HQL语句
      * @param values 不定参数的Object数组
      * @return 记录总数
      */
     public Long countByHql(String hql, Object... values);

     /**
      * HQL分页查询
      *
      * @param hql HQL语句
      * @param countHql 查询记录条数的HQL语句
      * @param pageNo 下一页
      * @param pageSize 一页总条数
      * @param values  不定Object数组参数
      * @return PageResults的封装类，里面包含了页码的信息以及查询的数据List集合
      */
     public  PageInfo<T> findPageByHql(String hql, String countHql, int pageNo, int pageSize, Object... values);

     /**
      * 按属性查找对象列表，匹配方式为相等
      * @param propertyName
      * @param value
      * @return List<T>
      */
     public List<T> list(String propertyName, Object value);

     /**
      * 根据criterion查询条件获取数据列表
      * @param criterion
      * @return List<T>
      */
     public List<T> list(Criterion criterion);

     /**
      * 按Criteria查询对象列表
      * @param criterions
      * @return List<T>
      */
     public List<T> list(Criterion... criterions);

     /**
      * 按属性查找唯一对象，匹配方式为相等
      * @param propertyName
      * @param value
      * @return T
      */
     public T uniqueResult(String propertyName, Object value);

     /**
      * 按Criteria查询唯一对象
      * @param criterions
      * @return T
      */
     public T uniqueResult(Criterion... criterions);

     /**
      * 按Criteria查询唯一对象
      * @param criteria
      * @return T
      */
     public T uniqueResult(Criteria criteria);

     /**
      * 按criteria查询某个Integer类型的字段
      * @param criteria
      * @return
      */
     public Integer uniqueResultInt(Criteria criteria);

     /**
      * 为Criteria添加distinct transformer
      * @param criteria
      * @return Criteria
      */
     public Criteria distinct(Criteria criteria);

     /**
      * 刷新session
      */
     public void flush();

     /**
      * 清空session
      */
     public void clear();

     /**
      * 创建Criteria实例
      */
     public Criteria createCriteria();

     /**
      * 根据Criterion条件创建Criteria
      * @param criterions
      * @return Criteria
      */
     public Criteria createCriteria(Criterion... criterions);

     /**
      * 分页查询Criteria
      * @param criteria
      * @param pageNo 下页页码
      * @param pageSize 页面数据量
      * @return List<T>
      */
     public List<T> findPage(Criteria criteria, int pageNo, int pageSize);

     /**
      * 分页查询Criteria
      * @param criteria
      * @param pageNo
      * @param pageSize
      * @return PageInfo<T>
      * @throws SecurityException
      * @throws NoSuchFieldException
      * @throws IllegalAccessException
      * @throws IllegalArgumentException
      */
     public PageInfo<T> findQuery(Criteria criteria, int pageNo, int pageSize);

     /**
      *
      * @param hql
      * @param pageNo
      * @param pageSize
      * @param map
      * @return List<T>
      */
     public List<T> findQuery(String hql, int pageNo, int pageSize, Map<?, ?> map);
 }

GenericDaoImpl.java

 package com.agen.dao.impl;

 import java.io.Serializable;
 import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;

 import org.hibernate.Criteria;
 import org.hibernate.Query;
 import org.hibernate.QueryException;
 import org.hibernate.ScrollableResults;
 import org.hibernate.Session;
 import org.hibernate.SessionFactory;
 import org.hibernate.criterion.CriteriaSpecification;
 import org.hibernate.criterion.Criterion;
 import org.hibernate.criterion.DetachedCriteria;
 import org.hibernate.criterion.Order;
 import org.hibernate.criterion.Projections;
 import org.hibernate.criterion.Restrictions;
 import org.hibernate.internal.CriteriaImpl;
 import org.hibernate.internal.CriteriaImpl.Subcriteria;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.Assert;

 import java.lang.reflect.ParameterizedType; 

 import com.agen.dao.GenericDao;
 import com.github.pagehelper.PageInfo;

 public class GenericDaoImpl<T, PK extends Serializable> implements GenericDao<T, PK> {
     /**
      * 不建议直接使用
      */
     @Autowired
     private SessionFactory sessionFactory;

     public Session getSession() {
         // 需要开启事物，才能得到CurrentSession
         return sessionFactory.getCurrentSession();
     }

     protected Class<T> entityClass;

     protected Class getEntityClass() {
         if (entityClass == null) {
             if(((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments().length > 0) {
                 entityClass = (Class<T>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
             }
         }
         return entityClass;
     }

     public SessionFactory getSessionFactory() {
         return sessionFactory;
     }

     public void setSessionFactory(SessionFactory sessionFactory) {
         this.sessionFactory = sessionFactory;
     }

     @Override
     public Criteria createCriteria() {
         return getSession().createCriteria(getEntityClass());
     }

     @Override
     public void save(T t) {
         this.getSession().save(t);
     }

     @Override
     public void saveOrUpdate(T t) {
         Assert.notNull(t);
         this.getSession().saveOrUpdate(t);
     }

     @Override
     public T load(PK id) {
         Assert.notNull(id);
         T load = (T) this.getSession().load(getEntityClass(), id);
         return load;
     }

     @Override
     public T get(PK id) {
         Assert.notNull(id);
         T load = (T) this.getSession().get(getEntityClass(), id);
         return load;
     }

     @Override
     public boolean contains(T t) {
         Assert.notNull(t);
         return this.getSession().contains(t);
     }

     @Override
     public void delete(T t) {
         Assert.notNull(t);
         this.getSession().delete(t);
     }

     @Override
     public boolean deleteById(PK Id) {
         Assert.notNull(Id);
         T t = get(Id);
         if (t == null) return false;
         delete(t);
         return true;
     }

     @Override
     public void deleteAll(Collection<T> entities) {
         Assert.notNull(entities);
         for (Object entity : entities) {
             this.getSession().delete(entity);
         }
     }

     @Override
     public void queryHql(String hqlString, Object... values) {
         Query query = this.getSession().createQuery(hqlString);
         if (values != null) {
             for (int i = 0; i < values.length; i++) {
                 query.setParameter(i, values[i]);
             }
         }
         query.executeUpdate();
     }

     /**
      * 根据hql  和    map集合中的数据   进行相对应的 insert   update   delete操作
      * @param hqlString
      * @param paras
      */
     public void queryHql(String hqlString, Map<String, Object> paras) {
         Query query = this.getSession().createQuery(hqlString);
         if (paras != null) {
             for (Entry<String, Object> en : paras.entrySet()) {
                 query.setParameter(en.getKey(), en.getValue());
             }
         }
         query.executeUpdate();
     }

     @Override
     public void querySql(String sqlString, Object... values) {
         Query query = this.getSession().createSQLQuery(sqlString);
         if (values != null) {
             for (int i = 0; i < values.length; i++) {
                 query.setParameter(i, values[i]);
             }
         }
         query.executeUpdate();
     }

     @Override
     public T getByHQL(String hqlString, Object... values) {
         Query query = this.getSession().createQuery(hqlString);
         if (values != null) {
             for (int i = 0; i < values.length; i++) {
                 query.setParameter(i, values[i]);
             }
         }
         return (T) query.uniqueResult();
     }

     @Override
     public List<T> getListByHQL(String hqlString, Object... values) {
         Query query = this.getSession().createQuery(hqlString);
         if (values != null) {
             for (int i = 0; i < values.length; i++) {
                 query.setParameter(i, values[i]);
             }
         }
         return query.list();
     }

     @Override
     public List<T> getListBySQL(String sqlString, Object... values) {
         Query query = this.getSession().createSQLQuery(sqlString);
         if (values != null) {
             for (int i = 0; i < values.length; i++) {
                 query.setParameter(i, values[i]);
             }
         }
         return query.list();
     }

     @Override
     public void refresh(T t) {
         this.getSession().refresh(t);
     }

     @Override
     public void update(T t) {
         this.getSession().update(t);
     }

     @Override
     public Long countByHql(String hql, Object... values) {
         Query query = this.getSession().createQuery(hql);
         if (values != null) {
             for (int i = 0; i < values.length; i++) {
                 query.setParameter(i, values[i]);
             }
         }
         return (Long) query.uniqueResult();
     }

     @Override
     public PageInfo<T> findPageByHql(String hql, String countHql, int pageNo, int pageSize, Object... values) {
         PageInfo<T> retValue = new PageInfo<T>();
         Query query = this.getSession().createQuery(hql);
         if (values != null) {
             for (int i = 0; i < values.length; i++) {
                 query.setParameter(i, values[i]);
             }
         }
         int currentPage = pageNo > 1 ? pageNo : 1;
         retValue.setPages(currentPage);
         retValue.setPageSize(pageSize);
         if (countHql == null) {
             ScrollableResults results = query.scroll();
             results.last();
             retValue.setTotal(results.getRowNumber() + 1);
         } else {
             Long count = countByHql(countHql, values);
             retValue.setTotal(count.intValue());
         }
         List<T> itemList = query.setFirstResult((currentPage - 1) * pageSize).setMaxResults(pageSize).list();
         if (itemList == null) {
             itemList = new ArrayList<T>();
         }
         retValue.setList(itemList);
         return retValue;
     }

     @Override
     public void merge(T entity) {
         // TODO Auto-generated method stub
         getSession().merge(entity);
     }

     @Override
     public boolean exists(PK id) {
         return null != get(id);
     }

     @Override
     public int countAll() {
         Criteria criteria = createCriteria();
         return Integer.valueOf(criteria.setProjection(Projections.rowCount()).uniqueResult().toString());
     }

     @Override
     public int countAll(Criteria criteria) {
         criteria.setProjection(null);
         return Integer.valueOf(criteria.setProjection(Projections.rowCount()).uniqueResult().toString());
     }

     @Override
     public List<T> list(Criteria criteria) {
         return criteria.list();
     }

     @Override
     public List<T> list(DetachedCriteria criteria) {
         return (List<T>) list(criteria.getExecutableCriteria(getSession()));
     }

     @Override
     public List<T> list(String orderBy, boolean isAsc) {
         Criteria criteria = createCriteria();
         if (isAsc) {
             criteria.addOrder(Order.asc(orderBy));
         } else {
             criteria.addOrder(Order.desc(orderBy));
         }
         return criteria.list();
     }

     @Override
     public List<T> list(String propertyName, Object value) {
         Criterion criterion = Restrictions.like(propertyName, "%"+ value +"%");
         return list(criterion);
     }

     @Override
     public List<T> list(Criterion criterion) {
         Criteria criteria = createCriteria();
         criteria.add(criterion);
         return criteria.list();
     }

     @Override
     public List<T> list(Criterion... criterions) {
         return createCriteria(criterions).list();
     }

     @Override
     public T uniqueResult(String propertyName, Object value) {
         Criterion criterion = Restrictions.eq(propertyName, value);
         return (T) createCriteria(criterion).uniqueResult();
     }

     @Override
     public T uniqueResult(Criterion... criterions) {
         Criteria criteria = createCriteria(criterions);
         return uniqueResult(criteria);
     }

     @Override
     public T uniqueResult(Criteria criteria) {
         return (T) criteria.uniqueResult();
     }

     @Override
     public Integer uniqueResultInt(Criteria criteria) {
         return (Integer) criteria.uniqueResult();
     }

     @Override
     public Criteria distinct(Criteria criteria) {
         criteria.setResultTransformer(CriteriaSpecification.DISTINCT_ROOT_ENTITY);
         return criteria;
     }

     @Override
     public void flush() {
         getSession().flush();
     }

     @Override
     public void clear() {
         getSession().clear();
     }

     @Override
     public Criteria createCriteria(Criterion... criterions) {
         Criteria criteria = createCriteria();
         for (Criterion c : criterions) {
             criteria.add(c);
         }
         return criteria;
     }

     @Override
     public List<T> findPage(Criteria criteria, int pageNo, int pageSize) {
         criteria.setFirstResult((pageNo - 1) * pageSize);
         criteria.setMaxResults(pageSize);
         return list(criteria);
     }

     @Override
     public PageInfo<T> findQuery(Criteria criteria, int pageNo, int pageSize) {
         try {
             Assert.isTrue(pageNo >= 1, "pageNO should start from 1");
             while(criteria instanceof Subcriteria){
                 criteria = ((Subcriteria)criteria).getParent();
             }
             //拆分order by子句
             while(criteria instanceof Subcriteria){
                 criteria = ((Subcriteria)criteria).getParent();
             }
             Field field = CriteriaImpl.class.getDeclaredField("orderEntries");
             field.setAccessible(true);
             List<?> orderEntrys = (List<?>) field.get(criteria);
             field.set(criteria, new ArrayList());
             //统计总数
             long totalCount = countAll(criteria);
             criteria.setProjection(null);
             //统计完了再把order by子句加上 这样保证了sql语句不会出错
             field.set(criteria, orderEntrys);
             List<T> list = findPage(criteria, pageNo, pageSize);
             if (totalCount < 1) {
                 return new PageInfo<T>();
             }
             PageInfo<T> page = new PageInfo<T>();
             page.setPageNum(pageNo);
             page.setTotal(totalCount);
             page.setPages((int) (totalCount % pageSize == 0 ? totalCount / pageSize : totalCount / pageSize + 1));
             page.setPageSize(pageSize);
             page.setList(list);
             return page;
         } catch (Exception e) {
             // TODO: handle exception
             e.printStackTrace();
             throw new QueryException("查询出错！");
         }

     }

     @Override
     public List<T> findQuery(String hql, int pageNo, int pageSize, Map<?, ?> map) {
         // TODO Auto-generated method stub
         if(null == hql) return null;
         Query query = getSession().createQuery(hql);
         for (Entry<?, ?> en : map.entrySet()) {
             query.setParameter(en.getKey().toString(), en.getValue());
         }
         if(pageNo > 0) query.setFirstResult(pageNo);
         if(pageSize > 0) query.setFirstResult(pageSize);
         return query.list();
     }

     @Override
     public List<T> findAll() {
         // TODO Auto-generated method stub
         return createCriteria().list();
     }
 }

GenericService.java

 package com.agen.service;

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

 import org.hibernate.Criteria;
 import org.hibernate.criterion.Criterion;
 import org.hibernate.criterion.DetachedCriteria;

 import com.github.pagehelper.PageInfo;

 public interface GenericService<T, PK extends Serializable> {
     /**
      * 查询全部，可以排序
      * @param orderBy
      * @param isAsc
      * @return List<T>
      */
     public List<T> list(Criteria criteria);

     /**
      * 查询全部，可以排序
      * @param orderBy
      * @param isAsc
      * @return List<T>
      */
     public List<T> list(String orderBy, boolean isAsc);

     /**
      * 离线查询
      * @param criteria
      * @return List<T>
      */
     public List<T> list(DetachedCriteria criteria);

     /**
      * 根据Criteria查询条件，获取总数
      * @param criteria
      * @return int
      * @throws SecurityException
      * @throws NoSuchFieldException
      * @throws IllegalAccessException
      * @throws IllegalArgumentException
      */
     public int countAll(Criteria criteria);

     /**
      * 获取总数(默认为entityClass) 即查询总条数
      * @return int
      */
     public int countAll();

     /**
      * 根据I判断是否存在
      * @param id
      * @return boolean
      */
     public boolean exists(PK id);

     /**
      * 保存实体
      * @param t 实体参数
      */
     public void save(T t);

     /**
      * 保存或者更新实体
      * @param t 实体
      */
     public void saveOrUpdate(T t);

     /**
      * 加载实体的通过load方法
      * @param id 实体的id
      * @return 查询出来的实体
      */
     public T load(PK id);

     /**
      * 合并实体
      * @param entity
      */
     public void merge(T entity);

     /**
      * 查找全部
      */
     public List<T> findAll();

     /**
      * 通过get方法加载实体的
      * @param id 实体的id
      * @return 查询出来的实体
      */
     public T get(PK id);

     /**
      * contains
      * @param t 实体
      * @return 是否包含
      */
     public boolean contains(T t);

     /**
      * delete
      * @param t
      * 删除实体
      */
     public void delete(T t);

     /**
      * 根据ID删除数据
      * @param Id 实体id
      * @return 是否删除成功
      */
     public boolean deleteById(PK Id);

     /**
      * 删除所有
      * @param entities 实体的Collection集合
      */
     public void deleteAll(Collection<T> entities);

     /**
      * 执行Hql语句 要求 hql中参数顺序与可变参数 中参数顺序相一致
      * @param hqlString hql
      * @param values 不定参数数组
      */
     public void queryHql(String hqlString, Object... values);

     /**
      * 执行Sql语句(不建议用，影响扩展)
      * @param sqlString sql
      * @param values 不定参数数组
      */
     public void querySql(String sqlString, Object... values);

     /**
      * 根据HQL语句查找唯一实体
      *
      * @param hqlString HQL语句
      * @param values 不定参数的Object数组
      * @return 查询实体
      */
     public T getByHQL(String hqlString, Object... values);

     /**
      * 根据SQL语句查找唯一实体（不建议用，影响扩展）
      * @param sqlString SQL语句
      * @param values 不定参数的Object数组
      * @return 查询实体
      */

     /**
      * 根据HQL语句，得到对应的list
      * @param hqlString HQL语句
      * @param values 不定参数的Object数组
      * @return 查询多个实体的List集合
      */
     public List<T> getListByHQL(String hqlString, Object... values);

     /**
      * 根据SQL语句，得到对应的list（不建议用，影响扩展）
      * @param sqlString HQL语句
      * @param values 不定参数的Object数组
      * @return 查询多个实体的List集合
      */
     public List<T> getListBySQL(String sqlString, Object... values);

     /**
      * refresh 刷新实体，强制与数据库两步 refresh方法应该是数据库的数据更新到本地的person实体中，而不是本地person更新数据到数据库中  也就是执行refresh方法是更新了java代码中变量的数据值
      * @param t 实体
      */
     public void refresh(T t);

     /**
      * update
      * @param t
      * 更新的是数据库中的数据
      */
     public void update(T t);

     /**
      * 根据HQL得到记录数
      * @param hql HQL语句
      * @param values 不定参数的Object数组
      * @return 记录总数
      */
     public Long countByHql(String hql, Object... values);

     /**
      * HQL分页查询
      *
      * @param hql HQL语句
      * @param countHql 查询记录条数的HQL语句
      * @param pageNo 下一页
      * @param pageSize 一页总条数
      * @param values  不定Object数组参数
      * @return PageResults的封装类，里面包含了页码的信息以及查询的数据List集合
      */
     public  PageInfo<T> findPageByHql(String hql, String countHql, int pageNo, int pageSize, Object... values);

     /**
      * 按属性查找对象列表，匹配方式为相等
      * @param propertyName
      * @param value
      * @return List<T>
      */
     public List<T> list(String propertyName, Object value);

     /**
      * 根据criterion查询条件获取数据列表
      * @param criterion
      * @return List<T>
      */
     public List<T> list(Criterion criterion);

     /**
      * 按Criteria查询对象列表
      * @param criterions
      * @return List<T>
      */
     public List<T> list(Criterion... criterions);

     /**
      * 按属性查找唯一对象，匹配方式为相等
      * @param propertyName
      * @param value
      * @return T
      */
     public T uniqueResult(String propertyName, Object value);

     /**
      * 按Criteria查询唯一对象
      * @param criterions
      * @return T
      */
     public T uniqueResult(Criterion... criterions);

     /**
      * 按Criteria查询唯一对象
      * @param criteria
      * @return T
      */
     public T uniqueResult(Criteria criteria);
     /**
      * 按照criteria返回类型为Integer类型的某个字段的值
      * @param criteria
      * @return
      */
     public Integer uniqueResultInt(Criteria criteria);

     /**
      * 为Criteria添加distinct transformer
      * @param criteria
      * @return Criteria
      */
     public Criteria distinct(Criteria criteria);

     /**
      * 刷新session
      */
     public void flush();

     /**
      * 清空session
      */
     public void clear();

     /**
      * 创建Criteria实例
      */
     public Criteria createCriteria();

     /**
      * 根据Criterion条件创建Criteria
      * @param criterions
      * @return Criteria
      */
     public Criteria createCriteria(Criterion... criterions);

     /**
      * 分页查询Criteria
      * @param criteria
      * @param pageNo 下页页码
      * @param pageSize 页面数据量
      * @return List<T>
      */
     public List<T> findPage(Criteria criteria, int pageNo, int pageSize);

     /**
      * 分页查询Criteria
      * @param criteria
      * @param pageNo
      * @param pageSize
      * @return PageInfo<T>
      * @throws SecurityException
      * @throws NoSuchFieldException
      * @throws IllegalAccessException
      * @throws IllegalArgumentException
      */
     public PageInfo<T> findQuery(Criteria criteria, int pageNo, int pageSize);

     /**
      *
      * @param hql
      * @param pageNo
      * @param pageSize
      * @param map
      * @return List<T>
      */
     public List<T> findQuery(String hql, int pageNo, int pageSize, Map<?, ?> map);
 }

GenericServiceImpl.java

 package com.agen.service.impl;

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

 import org.hibernate.Criteria;
 import org.hibernate.criterion.Criterion;
 import org.hibernate.criterion.DetachedCriteria;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Propagation;
 import org.springframework.transaction.annotation.Transactional;

 import com.agen.dao.impl.GenericDaoImpl;
 import com.agen.service.GenericService;
 import com.github.pagehelper.PageInfo;

 @Transactional
 public class GenericServiceImpl<T, PK extends Serializable> implements GenericService<T, PK> {

     private GenericDaoImpl<T, PK> dao;
     /**
      * 设值注入Dao
      * @param dao
      */
     @Autowired
     public void setDao(GenericDaoImpl<T, PK> dao) {
         this.dao = dao;
     }

     @Override
     public List<T> list(Criteria criteria) {
         // TODO Auto-generated method stub
         return dao.list(criteria);
     }

     @Override
     public List<T> list(String orderBy, boolean isAsc) {
         // TODO Auto-generated method stub
         return dao.list(orderBy, isAsc);
     }

     @Override
     public List<T> list(DetachedCriteria criteria) {
         // TODO Auto-generated method stub
         return dao.list(criteria);
     }

     @Override
     public int countAll(Criteria criteria) {
         // TODO Auto-generated method stub
         return dao.countAll(criteria);
     }

     @Override
     public int countAll() {
         // TODO Auto-generated method stub
         return dao.countAll();
     }

     @Override
     public boolean exists(PK id) {
         // TODO Auto-generated method stub
         return dao.exists(id);
     }

     @Override
     @Transactional(propagation = Propagation.REQUIRED)
     public void save(T t) {
         // TODO Auto-generated method stub
         dao.save(t);
     }

     @Override
     @Transactional(propagation = Propagation.REQUIRED)
     public void saveOrUpdate(T t) {
         // TODO Auto-generated method stub
         dao.saveOrUpdate(t);
     }

     @Override
     @Transactional(propagation = Propagation.REQUIRED)
     public T load(PK id) {
         // TODO Auto-generated method stub
         return dao.load(id);
     }

     @Override
     @Transactional(propagation = Propagation.REQUIRED)
     public void merge(T entity) {
         // TODO Auto-generated method stub
         dao.merge(entity);
     }

     @Override
     public List<T> findAll() {
         // TODO Auto-generated method stub
         return dao.findAll();
     }

     @Override
     @Transactional(propagation = Propagation.REQUIRED)
     public T get(PK id) {
         // TODO Auto-generated method stub
         return dao.get(id);
     }

     @Override
     public boolean contains(T t) {
         // TODO Auto-generated method stub
         return dao.contains(t);
     }

     @Override
     public void delete(T t) {
         // TODO Auto-generated method stub
         dao.delete(t);
     }

     @Override
     @Transactional(propagation = Propagation.REQUIRED)
     public boolean deleteById(PK Id) {
         // TODO Auto-generated method stub
         return dao.deleteById(Id);
     }

     @Override
     public void deleteAll(Collection<T> entities) {
         // TODO Auto-generated method stub
         dao.deleteAll(entities);
     }

     @Override
     public void queryHql(String hqlString, Object... values) {
         // TODO Auto-generated method stub
         dao.queryHql(hqlString, values);
     }

     @Override
     public void querySql(String sqlString, Object... values) {
         // TODO Auto-generated method stub
         dao.querySql(sqlString, values);
     }

     @Override
     public T getByHQL(String hqlString, Object... values) {
         // TODO Auto-generated method stub
         return dao.getByHQL(hqlString, values);
     }

     @Override
     public List<T> getListByHQL(String hqlString, Object... values) {
         // TODO Auto-generated method stub
         return dao.getListByHQL(hqlString, values);
     }

     @Override
     public List<T> getListBySQL(String sqlString, Object... values) {
         // TODO Auto-generated method stub
         return dao.getListBySQL(sqlString, values);
     }

     @Override
     public void refresh(T t) {
         // TODO Auto-generated method stub
         dao.refresh(t);
     }

     @Override
     @Transactional(propagation = Propagation.REQUIRED)
     public void update(T t) {
         // TODO Auto-generated method stub
         dao.update(t);
     }

     @Override
     public Long countByHql(String hql, Object... values) {
         // TODO Auto-generated method stub
         return dao.countByHql(hql, values);
     }

     @Override
     public PageInfo<T> findPageByHql(String hql, String countHql, int pageNo,
             int pageSize, Object... values) {
         // TODO Auto-generated method stub
         return dao.findPageByHql(hql, countHql, pageNo, pageSize, values);
     }

     @Override
     public List<T> list(String propertyName, Object value) {
         // TODO Auto-generated method stub
         return dao.list(propertyName, value);
     }

     @Override
     public List<T> list(Criterion criterion) {
         // TODO Auto-generated method stub
         return dao.list(criterion);
     }

     @Override
     public List<T> list(Criterion... criterions) {
         // TODO Auto-generated method stub
         return dao.list(criterions);
     }

     @Override
     public T uniqueResult(String propertyName, Object value) {
         // TODO Auto-generated method stub
         return dao.uniqueResult(propertyName, value);
     }

     @Override
     public T uniqueResult(Criterion... criterions) {
         // TODO Auto-generated method stub
         return dao.uniqueResult(criterions);
     }

     @Override
     @Transactional(propagation = Propagation.REQUIRED, readOnly = true)
     public T uniqueResult(Criteria criteria) {
         // TODO Auto-generated method stub
         return dao.uniqueResult(criteria);
     }

     @Override
     @Transactional(propagation = Propagation.REQUIRED, readOnly = true)
     public Integer uniqueResultInt(Criteria criteria){
         return dao.uniqueResultInt(criteria);
     }

     @Override
     public Criteria distinct(Criteria criteria) {
         // TODO Auto-generated method stub
         return dao.distinct(criteria);
     }

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

     @Override
     public void clear() {
         // TODO Auto-generated method stub
         dao.clear();
     }

     @Override
     public Criteria createCriteria() {
         // TODO Auto-generated method stub
         return dao.createCriteria();
     }

     @Override
     public Criteria createCriteria(Criterion... criterions) {
         // TODO Auto-generated method stub
         return dao.createCriteria(criterions);
     }

     @Override
     public List<T> findPage(Criteria criteria, int pageNo, int pageSize) {
         // TODO Auto-generated method stub
         return dao.findPage(criteria, pageNo, pageSize);
     }

     @Override
     public PageInfo<T> findQuery(Criteria criteria, int pageNo, int pageSize) {
         // TODO Auto-generated method stub
         return dao.findQuery(criteria, pageNo, pageSize);
     }

     @Override
     public List<T> findQuery(String hql, int pageNo, int pageSize, Map<?, ?> map) {
         // TODO Auto-generated method stub
         return dao.findQuery(hql, pageNo, pageSize, map);
     }

 }

我将这几个文件保存在如下：

我们看到实体包下的各个实体：

接下来  自动生成每一层的各个实体对应的相对应的代码文件：【注意在执行之前，查看基础文件位置是否正确/注意基础文件中关于工作包的代码 是否正确】

 package com.sxd.utils;

 import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;

 import org.junit.Test;
 import org.springframework.util.FileCopyUtils;
 /**
  * 生成dao 、service等代码
  * @author Administrator
  *
  */
 public class CreateJava {

     //包名 前半部分[java文件中内容]
     private String packPath = "package com.sxd";
     //包名  中间部分 例如:com.sxd.entity
     private String middlePath = "sxd";
     //项目名 用于生成文件的路径
     private String productName = "shiro-first";
     //dao service等基础的文件存放的路径
     private String DaoServicePath = "F:/workspace2/DaoService";

     @Test
     public void mainTest() throws IOException{
         createFiles();//第一步 生成各层文件夹,并从固定位置copy 基础dao，service文件
         justCreateJava();//第二步 生成各个实体对应的Dao等层文件
     }

     public void justCreateJava() throws IOException{
         File file = new File("F:/workspace2/"+productName+"/src/main/java/com/"+middlePath+"/entity");
         File []list = file.listFiles();
         for (File file2 : list) {
             String fileName = file2.getName().substring(0,file2.getName().lastIndexOf("."));
             createDao(fileName);
             createDaoImpl(fileName);
             createService(fileName);
             createServiceImpl(fileName);
         }
     }
     /**
      * 创建Dao层
      * @param fileName
      * @throws IOException
      */
     public void createDao(String fileName) throws IOException{
         //拼接 DaoImpl内容
                 String content = packPath+".dao;\r\n"
                         + "\r\n"
                         + "import com."+middlePath+".entity."+fileName+";\r\n"
                         + "public interface "+fileName+"Dao extends GenericDao<"+fileName+", String> {\r\n"
                                 + "\r\n"
                                 + "}";

                 //指定将Dao文件生成到对应的指定位置
                 FileWriter writer = new FileWriter(new File("F:/workspace2/"+productName+"/src/main/java/com/"+middlePath+"/dao/"+fileName+"Dao.java"));
                 writer.write(content);
                 writer.close();
     }

     /**
      * 创建DaoImpl层
      */
     public void createDaoImpl(String fileName) throws IOException{
         //拼接 DaoImpl内容
         String content = packPath+".dao.Impl;\r\n"
                 + "\r\n"
                 + "import org.springframework.stereotype.Repository;\r\n"
                 + "import com."+middlePath+".dao."+fileName+"Dao;\r\n"
                 + "import com."+middlePath+".entity."+fileName+";\r\n"
                 + "@Repository \r\n"
                 + "public class "+fileName+"DaoImpl extends GenericDaoImpl<"+fileName+", String> implements "+fileName+"Dao {\r\n"
                         + "\r\n"
                 + "}";

         //指定将DaoImpl文件生成到对应的指定位置
         FileWriter writer = new FileWriter(new File("F:/workspace2/"+productName+"/src/main/java/com/"+middlePath+"/dao/impl/"+fileName+"DaoImpl.java"));
         writer.write(content);
         writer.close();
     }

     /**
      * 创建 Service层
      * @param fileName
      * @throws IOException
      */
     public void createService(String fileName) throws IOException{
         //拼接Service内容
         String content = packPath+".service;\r\n"
                 + "import com."+middlePath+".entity."+fileName+";\r\n"
                 + "public interface "+fileName+"Service extends GenericService<"+fileName+", String> {\r\n"
                         + "\r\n"
                         + "}";

         FileWriter writer = new FileWriter(new File("F:/workspace2/"+productName+"/src/main/java/com/"+middlePath+"/service/"+fileName+"Service.java"));
         writer.write(content);
         writer.close();
     }

     /**
      * 创建ServiceImpl
      * @throws IOException
      */
     public void createServiceImpl(String fileName) throws IOException{
         //拼接Service内容
                 String content = packPath+".service.Impl;\r\n"
                         + "import org.springframework.beans.factory.annotation.Autowired;\r\n"
                         + "import org.springframework.stereotype.Service;\r\n"
                         + "import com."+middlePath+".dao."+fileName+"Dao;\r\n"
                         + "import com."+middlePath+".entity."+fileName+";\r\n"
                         + "import com."+middlePath+".service."+fileName+"Service;\r\n"
                         + "@Service \r\n"
                         + "public class "+fileName+"ServiceImpl extends GenericServiceImpl<"+fileName+", String> implements "+fileName+"Service {\r\n"
                                 + "\r\n"
                                 + "@Autowired\r\n"
                                 + "private "+fileName+"Dao dao;\r\n"
                                 + "}";
                 FileWriter writer = new FileWriter(new File("F:/workspace2/"+productName+"/src/main/java/com/"+middlePath+"/service/impl/"+fileName+"ServiceImpl.java"));
                 writer.write(content);
                 writer.close();
     }

     /**
      * 有了entity之后，创建各层文件夹,同时将 GenericDao等基础类和接口实现
      * @throws IOException
      */
     public void createFiles() throws IOException{
         String daoPath = "F:/workspace2/"+productName+"/src/main/java/com/"+middlePath+"/dao";
         String servicePath = "F:/workspace2/"+productName+"/src/main/java/com/"+middlePath+"/service";
         /**
          * 上来先删除掉 如果存在的话
          */
         delFolder(daoPath);
         delFolder(servicePath);

         /**
          * 创建文件夹
          */
         File file = new File(daoPath);
         file.mkdirs();
         File file2 = new File(servicePath);
         file2.mkdirs();
         File file3 = new File(daoPath+"/Impl");
         file3.mkdirs();
         File file4 = new File(servicePath+"/Impl");
         file4.mkdirs();
         copyDaoAndServiceFile(daoPath,servicePath);

     }

     //删除文件夹
     //param folderPath 文件夹完整绝对路径

          public  void delFolder(String folderPath) {
          try {
             delAllFile(folderPath); //删除完里面所有内容
             String filePath = folderPath;
             filePath = filePath.toString();
             java.io.File myFilePath = new java.io.File(filePath);
             myFilePath.delete(); //删除空文件夹
          } catch (Exception e) {
            e.printStackTrace();
          }
     }

     //删除指定文件夹下所有文件
     //param path 文件夹完整绝对路径
        public  boolean delAllFile(String path) {
            boolean flag = false;
            File file = new File(path);
            if (!file.exists()) {
              return flag;
            }
            if (!file.isDirectory()) {
              return flag;
            }
            String[] tempList = file.list();
            File temp = null;
            for (int i = 0; i < tempList.length; i++) {
               if (path.endsWith(File.separator)) {
                  temp = new File(path + tempList[i]);
               } else {
                   temp = new File(path + File.separator + tempList[i]);
               }
               if (temp.isFile()) {
                  temp.delete();
               }
               if (temp.isDirectory()) {
                  delAllFile(path + "/" + tempList[i]);//先删除文件夹里面的文件
                  delFolder(path + "/" + tempList[i]);//再删除空文件夹
                  flag = true;
               }
            }
            return flag;
          }

        //将dao等基础文件 拷贝到 项目下固定包中
        public void copyDaoAndServiceFile(String daoPath,String servicePath) throws IOException{
            File file1 = new File(daoPath+"/GenericDao.java");
            if(!file1.exists()){
                file1.createNewFile();
            }
            File file2 = new File(daoPath+"/Impl/GenericDaoImpl.java");
            if(!file2.exists()){
                file2.createNewFile();
            }
            File file3 = new File(servicePath+"/GenericService.java");
            if(!file3.exists()){
                file3.createNewFile();
            }
            File file4 = new File(servicePath+"/Impl/GenericServiceImpl.java");
            if(!file4.exists()){
                file4.createNewFile();
            }
            FileCopyUtils.copy(new File(DaoServicePath+"/GenericDao.java"), file1);
            FileCopyUtils.copy(new File(DaoServicePath+"/GenericDaoImpl.java"), file2);
            FileCopyUtils.copy(new File(DaoServicePath+"/GenericService.java"), file3);
            FileCopyUtils.copy(new File(DaoServicePath+"/GenericServiceImpl.java"), file4);

        }
 }

生成完刷新

效果如下：