Hibernate工具类（实现基本查询）

BaseDao

package com.kaishengit.dao;

import java.lang.reflect.ParameterizedType;
import java.util.List;

import javax.inject.Inject;

import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Criterion;
import org.hibernate.criterion.MatchMode;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Restrictions;
import org.hibernate.transform.ResultTransformer;





@SuppressWarnings("unchecked")
public class BaseDao<T> {
	
	@Inject
	private SessionFactory sessionFactory;
	private Class<?> clazz;
	
	public BaseDao() {
		ParameterizedType baseDaoType = (ParameterizedType) this.getClass().getGenericSuperclass(); //BaseDao<User>
		clazz = (Class<?>) baseDaoType.getActualTypeArguments()[0];
	}
	
	
	public void setSessionFactory(SessionFactory sessionFactory) {
		this.sessionFactory = sessionFactory;
	}

	public Session getSession() {
		return sessionFactory.getCurrentSession();
	}
	
	/**
	 * 添加或修改对象
	 * @param t
	 */
	public void save(T t) {

		getSession().save(t);
	}

	public void update(T t) {
		getSession().update(t);
	}
	
	/**
	 * 删除一个对象
	 * @param t
	 */
	public void delete(T t) {
		getSession().delete(t);
	}
	
	/**
	 * 根据ID删除对象
	 * @param id
	 */
	public void delete(int id) {
		getSession().delete(findById(id));
	}
	
	/**
	 * 根据ID查找对象
	 * @param id
	 * @return
	 */
	public T findById(int id) {
		return (T)getSession().get(clazz, id);
	}
	
	
	/**
	 * 获取所有对象
	 * @return
	 */
	public List<T> findAll() {
		return getCriteria().list();
	}
	
	/**
	 * 根据属性名称和值查找唯一的对象
	 * @param propertyName
	 * @param value
	 * @return
	 */
	public T findByPropertyForObject(String propertyName,Object value) {
		Criteria cri = getCriteria();
		cri.add(Restrictions.eq(propertyName, value));
		return (T) cri.uniqueResult();
	}
	
	/**
	 * 根据属性名称和值查找对象
	 * @param propertyName
	 * @param value
	 * @return
	 */
	public List<T> findByPropertyForList(String propertyName,Object value) {
		Criteria cri = getCriteria();
		cri.add(Restrictions.eq(propertyName, value));
		return cri.list();
	}
	
	/**
	 * 根据QueryFilter对象查找唯一对象
	 * @param filter
	 * @return
	 */
	public T findByPropertyForObject(QueryFilter filter) {
		Criteria cri = getCriteria();
		cri.add(createCriterion(filter));
		return (T) cri.uniqueResult();
	}
	
	/**
	 * 根据QueryFilter集合(多条件)查找唯一对象
	 * @param filters
	 * @return
	 */
	public T findByPropertyForObject(List<QueryFilter> filters) {
		Criteria cri = createCriterion(filters);
		return (T) cri.uniqueResult();
	}
	
	/**
	 * 根据QueryFilter集合(多条件)查找对象
	 * @param filters
	 * @return
	 */
	public List<T> findByPropertyForList(List<QueryFilter> filters) {
		Criteria cri = createCriterion(filters);
		return cri.list();
	}

	/**
	 * 根据QueryFilter对象查找对象
	 * @param filter
	 * @return
	 */
	public List<T> findByPropertyForList(QueryFilter filter) {
		Criteria cri = getCriteria();
		cri.add(createCriterion(filter));
		return cri.list();
	}
	
	/**
	 * 根据HQL查询唯一的对象
	 * @param hql
	 * @param args
	 * @return
	 */
	public T findByHqlForObject(String hql,Object...args) {
		Query query = getSession().createQuery(hql);
		for (int i = 0; i < args.length; i++) {
			query.setParameter(i, args[i]);
		}
		return (T) query.uniqueResult();
	}
	/**
	 * 根据HQL查询对象
	 * @param hql
	 * @param args
	 * @return
	 */
	public List<T> findByHqlForList(String hql,Object...args) {
		Query query = getSession().createQuery(hql);
		for (int i = 0; i < args.length; i++) {
			query.setParameter(i, args[i]);
		}
		return query.list();
	}
	
	
	public List<T> findByPage(int start,int size) {
		Criteria cri = getCriteria();
		cri.setFirstResult(start);
		cri.setMaxResults(size);
		return cri.list();
	}
	public List<T> findByPage(int start,int size,QueryFilter filter) {
		Criteria cri = getCriteria();
		cri.add(createCriterion(filter));
		cri.setFirstResult(start);
		cri.setMaxResults(size);
		return cri.list();
	}
	
	
	public Page<T> findByHqlPageNumber(String hql1, int page, int rows,
			Object...objects) {
		Query query=getSession().createQuery(hql1);
		for (int i = 0; i < objects.length; i++) {
			query.setParameter(i, objects[i]);
		}
		int count=query.list().size();
		Page<T> page1 = new Page<T>(page,count,rows);
		query.setFirstResult(page1.getStartIndex());
		query.setMaxResults(page1.getPageSize());
		page1.setItems(query.list());
		return  page1;
	}
	
	public Page<T> findByHqlPageNumber(String hql,int pageNum,int pageSize) {
		
		Query query = getSession().createQuery(hql);
		
		int count=query.list().size();
		Page<T> page = new Page<T>(pageNum,count,pageSize);
		query.setFirstResult(page.getStartIndex());
		query.setMaxResults(page.getPageSize());
		
		page.setItems(query.list());
		
		return page;
		
	}
	
	
	public Page<T> findByPageNum(int pageNum,int pageSize) {
		Criteria cri = getCriteria();
		
		@SuppressWarnings("static-access")
		ResultTransformer resultTransformer = cri.ROOT_ENTITY;
		
		cri.setProjection(Projections.rowCount());
		Long count = (Long) cri.uniqueResult();
		
		cri.setResultTransformer(resultTransformer);
		cri.setProjection(null);
		
		Page<T> page = new Page<T>(pageNum,count.intValue(),pageSize);
		cri.setFirstResult(page.getStartIndex());
		cri.setMaxResults(page.getPageSize());
		
		List<T> result = cri.list();
		page.setItems(result);
		
		return page;
		
	}
	
	
	
	

	
	
	
	public Page<T> findByPageNum(int pageNum,int pageSize,QueryFilter filter) {
		Criteria cri = getCriteria();
		cri.add(createCriterion(filter));
		@SuppressWarnings("static-access")
		ResultTransformer resultTransformer = cri.ROOT_ENTITY;
		
		cri.setProjection(Projections.rowCount());
		Long count = (Long) cri.uniqueResult();
		
		cri.setResultTransformer(resultTransformer);
		cri.setProjection(null);
		
		Page<T> page = new Page<T>(pageNum,count.intValue(), pageSize);
		cri.setFirstResult(page.getStartIndex());
		cri.setMaxResults(page.getPageSize());
		List<T> result = cri.list();
		page.setItems(result);
		
		return page;
		
	}
	public Page<T> findByPageNum(int pageNum,int pageSize,List<QueryFilter> filters) {
		
		Criteria cri = createCriterion(filters);
		
		@SuppressWarnings("static-access")
		ResultTransformer resultTransformer = cri.ROOT_ENTITY;
		
		cri.setProjection(Projections.rowCount());
		Long count = (Long) cri.uniqueResult();
		cri.setResultTransformer(resultTransformer);
		cri.setProjection(null);
		
		Page<T> page = new Page<T>(pageNum,count.intValue(),pageSize);
		cri.setFirstResult(page.getStartIndex());
		cri.setMaxResults(page.getPageSize());
		
		List<T> result = cri.list();
		page.setItems(result);
		
		return page;
		
	}
	/**
	 * @author YSC
	 * @param counthql
	 * @param hql
	 * @param pageNum
	 * @param rows
	 * @return
	 */
	public Page<T> findByHqlAndPageForList(String counthql, StringBuilder hql,
			int pageNum, int rows,Object...args) {
		Query countQuery = getSession().createQuery(counthql);
		Query query = getSession().createQuery(hql.toString());
		for (int i = 0; i < args.length; i++) {
			countQuery.setParameter(i, args[i]);
			query.setParameter(i, args[i]);
		}
		Long count = (Long) countQuery.uniqueResult();
		Page<T> page = new Page<T>(pageNum,count.intValue(),rows);
		query.setFirstResult(page.getStartIndex());
		query.setMaxResults(page.getPageSize());
		List<T> result = query.list();
		page.setItems(result);
		return page;
		
	}
	
	
	
	/**
	 * @author gaolin
	 * @param pageNum
	 * @param pageSize
	 * @param filters
	 * @return
	 */
	public Page<T> findByPageNumAndSum(int pageNum,int pageSize,List<QueryFilter> filters) {

		Criteria cri = createCriterion(filters);
		
		@SuppressWarnings("static-access")
		ResultTransformer resultTransformer = cri.ROOT_ENTITY;
		
		cri.setProjection(Projections.rowCount());
		Long count = (Long) cri.uniqueResult();
		cri.setResultTransformer(resultTransformer);
		cri.setProjection(null);
		
		
		
		
		Page<T> page = new Page<T>(pageNum,count.intValue(),pageSize);
		cri.setFirstResult(page.getStartIndex());
		cri.setMaxResults(page.getPageSize());
		
		List<T> result = cri.list();
		page.setItems(result);
		
		return page;
		
		
	}
	
	
	
	

	//help method
	
	private Criteria getCriteria() {
		return getSession().createCriteria(clazz);
	}

	public Criteria createCriterion(List<QueryFilter> filters) {
		Criteria cri = getCriteria();
		if(filters != null && !filters.isEmpty()) {
			for(QueryFilter filter : filters) {
				cri.add(createCriterion(filter));
			}
		}
		return cri;
	}
	
	private Criterion createCriterion(QueryFilter filter) {
		String propertyName = filter.getPropertyName();
		Object value = filter.getValue();
		
		String re = filter.getRe();
		
		if(QueryFilter.EQ.equalsIgnoreCase(re)) {
			return Restrictions.eq(propertyName, value);
		} else if(QueryFilter.GE.equalsIgnoreCase(re)) {
			return Restrictions.ge(propertyName, value);
		} else if(QueryFilter.GT.equalsIgnoreCase(re)) {
			return Restrictions.gt(propertyName, value);
		} else if(QueryFilter.LE.equalsIgnoreCase(re)) {
			return Restrictions.le(propertyName, value);
		} else if(QueryFilter.LT.equalsIgnoreCase(re)) {
			return Restrictions.lt(propertyName, value);
		} else if(QueryFilter.LIKE.equalsIgnoreCase(re)) {
			return Restrictions.like(propertyName, value.toString(), MatchMode.ANYWHERE);
		}
		return null;
	}
}

 QueryFilter

package com.kaishengit.dao;

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.lang.StringUtils;

public class QueryFilter {

	public static final String EQ = "eq"; //=
	public static final String GE = "ge"; //>=
	public static final String LE = "le"; //<=
	public static final String LT = "lt"; //<
	public static final String GT = "gt"; //>
	public static final String LIKE = "like"; // like
	
	private String propertyName;
	private Object value;
	private String re;
	
	public QueryFilter(String propertyName,String re,Object value) {
		this.propertyName = propertyName;
		this.value = value;
		this.re = re;
	}
	
	public QueryFilter() {}
	
	public QueryFilter(String propertyName,Object value) {
		this(propertyName,EQ,value);
	}

	public String getPropertyName() {
		return propertyName;
	}

	public void setPropertyName(String propertyName) {
		this.propertyName = propertyName;
	}

	public Object getValue() {
		return value;
	}

	public void setValue(Object value) {
		this.value = value;
	}

	public String getRe() {
		return re;
	}

	public void setRe(String re) {
		this.re = re;
	}
	
	public static List<QueryFilter> builderQueryFilterByRequest(
			HttpServletRequest request) {
		
		
		List<QueryFilter> filters = new ArrayList<QueryFilter>();
		
		
		Enumeration<String> e = request.getParameterNames();
		
		 while(e.hasMoreElements()) {
			 String parmName = e.nextElement();
			 
			 if(parmName.startsWith("Q_")) {
				 if(parmName.indexOf("_") == parmName.lastIndexOf("_")) {
					 throw new IllegalArgumentException("比较规则错误");
				 } else {
					 
					 String type = parmName.substring(parmName.indexOf("_")+1, parmName.lastIndexOf("_"));
					 String propertyName = parmName.substring(parmName.lastIndexOf("_")+1);
					 String value = request.getParameter(parmName);
					 if(StringUtils.isNotEmpty(value)) {
						 
						 if(propertyName.contains("-")) {
							 String propertyType = propertyName.substring(propertyName.indexOf("-")+1);
							 propertyName = propertyName.substring(0,propertyName.indexOf("-"));
							 
							 Object v = value;
							 if(propertyType.equalsIgnoreCase("i")) {
								 v = Integer.parseInt(value);
							 } else if(propertyType.equalsIgnoreCase("l")) {
								 v = Long.parseLong(value);
							 } else if(propertyType.equalsIgnoreCase("f")) {
								 v = Float.parseFloat(value);
							 } else if(propertyType.equalsIgnoreCase("d")) {
								 v = Double.parseDouble(value);
							 } else if(propertyType.equalsIgnoreCase("b")) {
								 v = Boolean.parseBoolean(value);
							 }
							 
							 QueryFilter filter = new QueryFilter(propertyName, type, v);
							 filters.add(filter);
						 } else {
							 QueryFilter filter = new QueryFilter(propertyName, type, value);
							 filters.add(filter);
						 }
					 }
					 
					 
				 }
			 }
		 }
		
		return filters;
	}
	/**
	 * @author YSC
	 * @param request
	 * @return
	 */
	@SuppressWarnings("unchecked")
	public static List<QueryFilter> builderQueryFilterByParams(
			HttpServletRequest request) {
		
		
		List<QueryFilter> filters = new ArrayList<QueryFilter>();
		
		
		Enumeration<String> e = request.getParameterNames();
		
		 while(e.hasMoreElements()) {
			 String parmName = e.nextElement();
			 if(parmName.startsWith("Q_")) {
				 if(parmName.indexOf("_") == parmName.lastIndexOf("_")) {
					 throw new IllegalArgumentException("比较规则错误");
				 } else {
					 
					 String type = parmName.substring(parmName.indexOf("_")+1, parmName.lastIndexOf("_"));
					 String propertyName = parmName.substring(parmName.lastIndexOf("_")+1);
					 String value = request.getParameter(parmName);
					 if(StringUtils.isNotEmpty(value)) {
						 
						 if(propertyName.contains("$")) {
							 String propertyType = propertyName.substring(propertyName.indexOf("$")+1);
							 propertyName = propertyName.substring(0,propertyName.indexOf("$"));
							 
							 Object v = value;
							 if(propertyType.equalsIgnoreCase("i")) {
								 v = Integer.parseInt(value);
							 } else if(propertyType.equalsIgnoreCase("l")) {
								 v = Long.parseLong(value);
							 } else if(propertyType.equalsIgnoreCase("f")) {
								 v = Float.parseFloat(value);
							 } else if(propertyType.equalsIgnoreCase("d")) {
								 v = Double.parseDouble(value);
							 } else if(propertyType.equalsIgnoreCase("b")) {
								 v = Boolean.parseBoolean(value);
							 }
							 
							 QueryFilter filter = new QueryFilter(propertyName, type, v);
							 filters.add(filter);
						 } else {
							 QueryFilter filter = new QueryFilter(propertyName, type, value);
							 filters.add(filter);
						 }
					 }
					 
					 
				 }
			 }
		 }
		
		return filters;
	}
	
	public static List<QueryFilter> builderQueryFilterByRequestWithout(
			HttpServletRequest request) {
		
		
		List<QueryFilter> filters = new ArrayList<QueryFilter>();
		
		
		Enumeration<String> e = request.getParameterNames();
		
		 while(e.hasMoreElements()) {
			 String parmName = e.nextElement();
			 
			 if(parmName.startsWith("Q_")) {
				 if(parmName.indexOf("_") == parmName.lastIndexOf("_")) {
					 throw new IllegalArgumentException("比较规则错误");
				 } else {
					 
					 String type = parmName.substring(parmName.indexOf("_")+1, parmName.lastIndexOf("_"));
					 String propertyName = parmName.substring(parmName.lastIndexOf("_")+1);
					 String value = request.getParameter(parmName);
					 if(!("staffname".equals(propertyName)||"companyname".equals(propertyName))){
						 if(StringUtils.isNotEmpty(value)) {
							 
							 if(propertyName.contains("-")) {
								 String propertyType = propertyName.substring(propertyName.indexOf("-")+1);
								 propertyName = propertyName.substring(0,propertyName.indexOf("-"));
								 
								 Object v = value;
								 if(propertyType.equalsIgnoreCase("i")) {
									 v = Integer.parseInt(value);
								 } else if(propertyType.equalsIgnoreCase("l")) {
									 v = Long.parseLong(value);
								 } else if(propertyType.equalsIgnoreCase("f")) {
									 v = Float.parseFloat(value);
								 } else if(propertyType.equalsIgnoreCase("d")) {
									 v = Double.parseDouble(value);
								 } else if(propertyType.equalsIgnoreCase("b")) {
									 v = Boolean.parseBoolean(value);
								 }
								 
								 QueryFilter filter = new QueryFilter(propertyName, type, v);
								 filters.add(filter);
							 } else {
								 QueryFilter filter = new QueryFilter(propertyName, type, value);
								 filters.add(filter);
							 }
						 }
					 }	 
					 
				 }
			 }
		 }
		
		return filters;
	}

	/**
	 * @author YSC
	 * @param request
	 * @return
	 */
	public static List<String> createHqlFromRequest(HttpServletRequest request) {
		@SuppressWarnings("unchecked")
		Enumeration<String> e = request.getParameterNames();
		List<String> slist = new ArrayList<String>();
		 while(e.hasMoreElements()) {
			 String parmName = e.nextElement();
			 if(parmName.startsWith("Q_")) {
				 if(parmName.indexOf("_") == parmName.lastIndexOf("_")) {
					 throw new IllegalArgumentException("比较规则错误");
				 } else {
					 
					 String type = parmName.substring(parmName.indexOf("_")+1, parmName.lastIndexOf("_"));
					 String propertyName = parmName.substring(parmName.lastIndexOf("_")+1);
					 String value = request.getParameter(parmName);
					 if(StringUtils.isNotEmpty(value)) {
						 Object v = value;
						 if("EQ".equals(type)){
							 type = "=";
						 }else if("LT".equals(type)){
							 type = "<";
						 }else if("LE".equals(type)){
							 type = "<=";
						 }else if("GT".equals(type)){
							 type = ">";
						 }else if("GE".equals(type)){
							 type = ">=";
						 }else if("LIKE".equals(type)){
							 type = "like";
						 }
						 StringBuilder sb = new StringBuilder();
						 if(propertyName.contains("$")) {
							 String propertyType = propertyName.substring(propertyName.indexOf("$")+1);
							 propertyName = propertyName.substring(0,propertyName.indexOf("$"));
							 sb.append(propertyName).append(" ").append(type);
							 if(propertyType.equalsIgnoreCase("i")) {
								 v = Integer.parseInt(value);
								 sb.append(" "+v+" ");
							 } else if(propertyType.equalsIgnoreCase("l")) {
								 v = Long.parseLong(value);
								 sb.append(" "+v+" ");
							 } else if(propertyType.equalsIgnoreCase("f")) {
								 v = Float.parseFloat(value);
								 sb.append(" "+v+" ");
							 } else if(propertyType.equalsIgnoreCase("d")) {
								 v = Double.parseDouble(value);
								 sb.append(" "+v+" ");
							 } else if(propertyType.equalsIgnoreCase("b")) {
								 v = Boolean.parseBoolean(value);
								 sb.append(" "+v+" ");
							 }
						 }else{
							 sb.append(propertyName).append(" ").append(type);
							 sb.append(" '"+v+"'");
						 }
						 slist.add(sb.toString());
					 }
					 
					 
				 }
			 }
		 }
		return slist;
	}

}