- package com.zhanggaosong.ssh.commdao;
- import java.io.Serializable;
- import java.sql.SQLException;
- import java.util.List;
- import java.util.Map;
- import java.util.Set;
- import org.apache.log4j.Logger;
- import org.hibernate.Criteria;
- import org.hibernate.HibernateException;
- import org.hibernate.Query;
- import org.hibernate.Session;
- import org.hibernate.criterion.Expression;
- import org.hibernate.criterion.Order;
- import org.hibernate.type.DateType;
- import org.hibernate.type.FloatType;
- import org.hibernate.type.IntegerType;
- import org.hibernate.type.StringType;
- import org.hibernate.type.Type;
- import org.springframework.orm.hibernate3.HibernateCallback;
- import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
-
- /**
- * 通用的操作类 dao
- *
- * @author 谢晋
- *
- */
- public class CommDao<T> extends HibernateDaoSupport {
- // logger日志对象
- protected Logger log = Logger.getLogger(this.getClass());
-
- public CommDao() {
-
- }
-
- /**
- * 添加一个对象
- */
- public T addObject(T obj) {
- this.getHibernateTemplate().save(obj);
- return obj;
- }
-
- /**
- * 删除一个对象
- */
- public T deleteObject(T obj) {
- this.getHibernateTemplate().delete(obj);
- return obj;
- }
-
- /**
- * 更新一个对象
- */
- public T updateObject(T obj) {
- this.getHibernateTemplate().update(obj);
- return obj;
- }
-
- /**
- * 排序+分页功能+条件查询
- *
- * @param <E>
- * @param cl
- * @param map
- * 条件参数
- * @param orderstr
- * 排序字段 如果为null不排序
- * @param beginpos
- * 分页起点 如果为null不分页
- * @param count
- * 每页的记录总数 如果为null不分页
- * @return 返回List集合
- */
- public <E> List<E> getOrderObjects(final Class cl, final Map map,
- final String orderstr, final Integer beginpos, final Integer count) {
- List<E> list = this.getHibernateTemplate().executeFind(
- new HibernateCallback() {
- public Object doInHibernate(Session session)
- throws HibernateException, SQLException {
- Criteria cri = session.createCriteria(cl);
- if (map != null) {
- Set keyset = map.keySet();
- for (Object key : keyset) {
- if (key == null || map.get(key) == null) {
- continue;
- }
- // 如果对应的值是字符串类型,我就是用like匹配
- if (map.get(key).getClass() == String.class) {
- cri.add(Expression.like(key.toString(), map
- .get(key)));
- } else {
- cri.add(Expression.eq(key.toString(), map
- .get(key)));
- }
- }
- }
- if (orderstr != null) {
- cri.addOrder(Order.desc(orderstr));
- }
- if (beginpos != null) {
- cri.setFirstResult(beginpos);
- } else {
- cri.setFirstResult(0);
- }
- if (count != null) {
- cri.setMaxResults(count);
- }
- return (List<E>) cri.list();
- }
- });
- return list;
- }
-
- /**
- * 分页查询 ,传一个hql语句. 和一个参数数组.
- *
- * @param hql
- * hql语句
- * @param bindValue
- * 数组参数
- * @param first
- * 分页起点
- * @param count
- * 每页的记录总数
- * @return 返回List集合
- */
- public List pageQuery(final String hql, final Object[] bindValue,
- final Integer first, final Integer count) {
- List list = this.getHibernateTemplate().executeFind(
- new HibernateCallback() {
- public Object doInHibernate(Session session)
- throws HibernateException, SQLException {
- Query query = session.createQuery(hql);
-
- if (bindValue != null && bindValue.length >= 1) {
- Type[] types = typesFactory(bindValue);
- query.setParameters(bindValue, types);
- }
- if (first != null && first.intValue() >= 0) {
- query.setFirstResult(first);
- if (count != null && count.intValue() >= 0)
- query.setMaxResults(count);
- }
- List result = query.list();
- return result;
- }
- });
- return list;
- }
-
- /**
- * 获取对象对应参数的类型
- *
- * @param bindValue
- * @return
- */
- private final Type[] typesFactory(Object[] bindValue) {
- int count = bindValue.length;
- Type[] types = new Type[count];
- for (int i = 0; i < count; i++) {
- if (bindValue[i].getClass().getName().endsWith("String")) {
- types[i] = new StringType();
- } else if (bindValue[i].getClass().getName().endsWith("Integer")) {
- types[i] = new IntegerType();
- } else if (bindValue[i].getClass().getName().endsWith("Float")) {
- types[i] = new FloatType();
- } else if (bindValue[i].getClass().getName().endsWith("Date")) {
- types[i] = new DateType();
- }
- }
- return types;
- }
-
- /**
- * 查询某个类的全部对象
- *
- * @param <E>
- * @param c
- * 查询类的class
- * @return
- */
- public <E> List<E> selectAllObject(final Class c) {
- List<E> list = this.getHibernateTemplate().executeFind(
- new HibernateCallback() {
- public Object doInHibernate(Session session)
- throws HibernateException, SQLException {
- Criteria cri = session.createCriteria(c);
- List<E> list = cri.list();
- return list;
- }
- });
- return list;
- }
-
- /**
- * 根据 主键 查询某个对象
- *
- * @param <E>
- * @param c
- * @param id
- * @return
- */
- public <E> E selectObjectById(final Class c, final Serializable id) {
- E e = (E) this.getHibernateTemplate().execute(new HibernateCallback() {
- public Object doInHibernate(Session session)
- throws HibernateException, SQLException {
- E aa = (E) session.get(c, id);
- return aa;
- }
- });
- return e;
- }
-
- /**
- * 根据条件,查询一个对象.
- *
- * @param <E>
- * @param c
- * @param map
- * map放条件查询参数 调用的时候?: String username="xiejin" ;
- * map.put("username",username);
- * @return
- */
- public <E> E selectUniqueObject(final Class c, final Map map) {
- E e = (E) this.getHibernateTemplate().execute(new HibernateCallback() {
- public Object doInHibernate(Session session)
- throws HibernateException, SQLException {
- Criteria cri = session.createCriteria(c);
- cri.add(Expression.allEq(map));
- return (E) cri.uniqueResult();
- }
- });
- return e;
- }
-
- /**
- * 带条件的查询.返回list集合
- *
- * @param <E>
- * @param c
- * @param map
- * 根据map里面放置的参数
- * @return 返回一个list对象集合
- */
- public <E> List<E> seletcObjectByMap(final Class c, final Map map) {
- List<E> list = this.getHibernateTemplate().executeFind(
- new HibernateCallback() {
- public Object doInHibernate(Session session)
- throws HibernateException, SQLException {
- Criteria cri = session.createCriteria(c);
- cri.add(Expression.allEq(map));
- List<E> e = cri.list();
- return e;
- }
- });
- return list;
- }
-
- /**
- * 一个泛型方法:支持条件查询,排序,分页查询.
- *
- * @param <E>
- * 类别
- * @param cl
- * 需要查询的类
- * @param map
- * map中put("uname","谢晋"); null or map
- * 模糊查询用("uname","%"+uname+"%")
- * @param orderStr
- * 是否需要排序(升序) null or "属性字段"
- * @param beginIndex
- * 分页开始位置 null or Integer
- * @param count
- * 记录条数 null or Integer
- * @return
- */
- @SuppressWarnings("unchecked")
- public <E> List<E> selectObjInfoByMapCondtionAndOrderAndPageQuery(
- final Class cl, final Map map, final String orderStr,
- final Integer beginIndex, final Integer count) {
- List e = this.getHibernateTemplate().executeFind(
- new HibernateCallback() {
- public Object doInHibernate(Session session)
- throws HibernateException, SQLException {
- // 使用 Criteria查询 代替复杂得hql语句;
- Criteria cri = session.createCriteria(cl);
- // 对map进行判断
- if (map != null) {
- Set keyset = map.keySet();
- for (Object key : keyset) {
- // 如果为空则继续遍历
- if (key == null || map.get(key) == null) {
- continue;
- }
- // 如果是参数值是字符串则用模糊查询. like 匹配
- if (map.get(key).getClass() == String.class) {
- cri.add(Expression.like(key.toString(), map
- .get(key)));
- } else {
- cri.add(Expression.eq(key.toString(), map
- .get(key)));
- }
- }
- }
- // 对orderStr 进行判断
- if (orderStr != null) {
- cri.addOrder(Order.asc(orderStr));// 升序
- }
- // 对分页 进行判断
- if (beginIndex != null && beginIndex.intValue() >= 0) {
- cri.setFirstResult(beginIndex.intValue());
- if (count != null && count.intValue() >= 0) {
- cri.setMaxResults(count.intValue());
- }
- }
- return (List<E>) cri.list();
- }
- });
- return e;
- }
- }
posted @
2013-06-25 22:38
zhgs_cq
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