Hibernate时间操作二

                                             Hibernate中使用Hql查询出一定时间段的记录

import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class GenHql {
private String hql = "";

public static void main(String args[]) {
GenHql genHql = new GenHql();
Timestamp startTime = Timestamp.valueOf("2010-03-12 19:11:40");
Timestamp endTime = Timestamp.valueOf("2010-03-16 19:11:40");
genHql.setHqlByTimestamp(startTime);
String hql1 = "select * from Test t where 1=1 " + genHql.getHql();
genHql.setHqlByTimestamp(startTime, endTime);
String hql2 = "select * from Test t where 1=1 " + genHql.getHql();
System.out.println("开始时间到现在" + hql1);
System.out.println("开始时间到结束时间" + hql2);
}

// 根据开始时间和结束时间生成hql语句
public void setHqlByTimestamp(Timestamp startTime, Timestamp endTime) {
String beginDate = "";
String endDate = "";
SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

if (startTime != null && startTime.toString() != "") {
// startTime = Timestamp.valueOf("2010-03-12 19:11:40");
Calendar cal = Calendar.getInstance();
cal.setTime(startTime);
Date begin = cal.getTime();
beginDate = f.format(begin);
hql += " and t.timestamp>=to_date('" + beginDate
+ "','YYYY-MM-DD HH24:MI:SS')";
}

if (endTime == null || endTime.toString().equals("")) {
Date date = new Date();
endDate = f.format(date);
hql += " and t.timestamp<=to_date('" + endDate
+ "','YYYY-MM-DD HH24:MI:SS')";
} else {
// startTime = Timestamp.valueOf("2010-03-12 19:11:40");
Calendar cal = Calendar.getInstance();
cal.setTime(endTime);
Date end = cal.getTime();
endDate = f.format(end);
hql += " and t.timestamp<=to_date('" + endDate
+ "','YYYY-MM-DD HH24:MI:SS')";
}
System.out.println(hql);
}

// 根据开始时间生成hql语句
public void setHqlByTimestamp(Timestamp startTime) {
String beginDate = "";
String endDate = "";
hql = "";
SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

if (startTime != null && startTime.toString() != "") {
// startTime = Timestamp.valueOf("2010-03-12 19:11:40");
Calendar cal = Calendar.getInstance();
cal.setTime(startTime);
Date begin = cal.getTime();
beginDate = f.format(begin);
hql = " and t.timestamp>=to_date('" + beginDate
+ "','YYYY-MM-DD HH24:MI:SS')";
}
}

public String getHql() {
return hql;
}

public void setHql(String hql) {
this.hql = hql;
}
}