DeptTest.java

????? 測試類：

先創建Session：

private Session session;private Transaction tx;@Beforepublic void beforeMethod(){session=new Configuration().configure().buildSessionFactory().openSession();}
關閉Session：

@Afterpublic void afterMethod() {if (session != null) {session.close();}}
開始測試：

??? /**
?? ? * 測試簡單查詢
?? ? */

@Testpublic void testMethod1() {//查詢所有的部門Criteria criteria=session.createCriteria(Dept.class);List<Dept> deptList=criteria.list();for (Dept dept : deptList) {System.out.println("部門編號："+dept.getDeptno());System.out.println("部門名稱："+dept.getDname());System.out.println("部門編地址："+dept.getLoc());}}

查詢部門在山西呂梁的部門名稱

//查詢部門地址在山西呂梁的部門名稱@Testpublic void test2(){List<Dept> deptList=session.createCriteria(Dept.class).add(Restrictions.eq("loc", "山西呂梁")).list();for (Dept dept : deptList) {System.out.println(dept.getDeptno()+","+dept.getDname());}}

//查詢工資高于5000的員工

@Testpublic void test3(){List<Emp> empList=session.createCriteria(Emp.class).add(Restrictions.gt("sal", 5000D)).list();for (Emp emp : empList) {System.out.println(emp.getEname()+","+emp.getSal());}}
//查詢不屬于任何部門的員工

@Testpublic void test4(){List<Emp> empList=session.createCriteria(Emp.class).add(Restrictions.isNull("dept")).list();for (Emp emp : empList) {System.out.println(emp.getEname());}}
//查詢職位是CLERK的員工
?? ?//ignoreCase:不區分大小寫

@Testpublic void test5(){List<Emp> empList=session.createCriteria(Emp.class).add(Restrictions.eq("job","ClERK").ignoreCase()).list();for (Emp emp : empList) {System.out.println(emp.getEname()+","+emp.getDept().getDname());}}

?? ?/**
?? ? * in:等于列表中的某一個值
?? ? * not in:不等于列表中的任何一個值
?? ? * between 值1 and 值2：大于等于值1并且小于值2
?? ? * not between 值1 and 值2：小于值1或者大于值2
?? ? */
?? ?//查詢職位是ANALYST 或? SALESMAN 的員工

@Testpublic void test6(){List jobList=new ArrayList();jobList.add("SALESMAN");jobList.add("ANALYST");List<Emp> empoList=session.createCriteria(Emp.class).add(Restrictions.in("job",jobList)).list();for (Emp emp : empoList) {System.out.println(emp.getEname()+","+emp.getJob());}}
//查詢工資在2000元到4000元的員工 @Testpublic void test7(){List<Emp> empList=session.createCriteria(Emp.class).add(Restrictions.between("sal", 2000D, 4000D)).list();for (Emp emp : empList) {System.out.println(emp.getEname()+","+emp.getSal());}}
/**
?? ? * like:字符串模式匹配
?? ? * ilike：字符串木事匹配，忽略大小寫
?? ? */
?? ?//查詢姓名中包括s的職位(like)

@Testpublic void test8(){List<Emp> empList=session.createCriteria(Emp.class).add(Restrictions.like("job","%s%")).list();for (Emp emp : empList) {System.out.println(emp.getEname());}}
//查詢姓名中包括s的職位(ilike)

@Testpublic void test9(){List<Emp> empList=session.createCriteria(Emp.class).add(Restrictions.ilike("job","%s%")).list();for (Emp emp : empList) {System.out.println(emp.getEname());}}
/**
?? ??? ? * MatchMode靜態常量
?? ??? ? * 1.MatchMode.STRART:?? 員工姓名以s開頭
?? ??? ? * 2.MatchMode.END：???????????????? 員工姓名以s結尾
?? ??? ? * 3.MatchMode.ANYWHERE? 員工姓名中包含s
?? ??? ? * 4.MatchMode.EXACT???? 員工姓名中等于s精確匹配
?? ??? ? */
?? ??? ?//查詢職位中包括s的職位

@Testpublic void test10(){List<Emp> empList=session.createCriteria(Emp.class).add(Restrictions.ilike("job","%s%",MatchMode.ANYWHERE)).list();for (Emp emp : empList) {System.out.println(emp.getJob());}}
/**
?? ??? ? *邏輯運算
?? ??? ? *1.and:邏輯與
?? ??? ? *2.or:邏輯或
?? ??? ? *3.not:邏輯非
?? ??? ? */
?? ??? ?//查詢職位是accountant 或者是analyert的職位名稱
@Testpublic void test11(){List<Emp> empList=session.createCriteria(Emp.class).add(Restrictions.or(Restrictions.eq("job", "analyert").ignoreCase(),Restrictions.eq("job","accountant").ignoreCase())).list();for (Emp emp : empList) {System.out.println(emp.getJob());}}
//查詢職位是accountant 或者是analyert 或者是 engineer的職位名稱
@Testpublic void test12(){List<Emp> empList=session.createCriteria(Emp.class).add(Restrictions.disjunction().add(Restrictions.eq("job", "analyert").ignoreCase()).add(Restrictions.eq("job","accountant").ignoreCase()).add(Restrictions.eq("job", "engineer").ignoreCase())).list();for (Emp emp : empList) {System.out.println(emp.getJob());}}
/**
?? ??? ??? ? * 集合運算符
?? ??? ??? ? * 1. is empty:集合為空，不包含任何元素
?? ??? ??? ? * 2. is not empty：集合不為空
?? ??? ??? ? */
?? ??? ??? ?//查詢沒有員工的部門

@Testpublic void test13(){List<Dept> deptList=session.createCriteria(Dept.class).add(Restrictions.isEmpty("emps")).list();for (Dept dept : deptList) {System.out.println(dept.getDname());}}
/**
?? ??? ? * 動態查詢
?? ??? ? * 條件見下：（條件類：EmpCondition）
?? ??? ? * 1.job是engineer
?? ??? ? * 2.sal大于2000
?? ??? ? * 3.入職時間在2006年12月31日到2008年12月31日之前
?? ??? ? */

@Testpublic void test14(){SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd");EmpCondition empCondition=new EmpCondition();try {empCondition.setJob("engineer");empCondition.setSal(2000D);String hiredateStart="2006-12-31";String hiredateEnd="2008-12-31";Date hiredateStart1=format.parse(hiredateStart);Date hiredateEnd1=format.parse(hiredateEnd);empCondition.setHiredateStart(hiredateStart1);empCondition.setHiredateEnd(hiredateEnd1);} catch (ParseException e) {// TODO Auto-generated catch blocke.printStackTrace();}
//添加動態查詢的條件

Criteria criteria=session.createCriteria(Emp.class);if(empCondition.getJob()!=null){criteria.add(Restrictions.ilike("job", empCondition.getJob()));}if(empCondition.getSal()!=null){criteria.add(Restrictions.gt("sal",empCondition.getSal()));}if(empCondition.getHiredateStart()!=null){criteria.add(Restrictions.ge("hiredate",empCondition.getHiredateStart()));}if(empCondition.getHiredateEnd()!=null){criteria.add(Restrictions.le("hiredate",empCondition.getHiredateEnd()));} //輸出List<Emp>emplist=criteria.list();for (Emp emp : emplist) {System.err.println(emp.getEname()+","+emp.getJob()+","+emp.getSal()+","+emp.getHiredate());}}

?? ??? ?/**
?? ??? ? * 分頁查詢
?? ??? ? */
?? ??? ?//分頁查詢部門是SALESMAN 的所有員工
?? ??? ?//并且工資降序
?? ??? ?//顯示總頁數，總記錄數，當前頁號

@Testpublic void test15(){Criteria criteria =session.createCriteria(Emp.class).add(Restrictions.eq("job", "SALESMAN").ignoreCase()).setProjection(Projections.count("empno"));//獲得總記錄數Integer count=(Integer)criteria.uniqueResult();//分頁int pageSize=2;int pageIndex=1;int totalPage=count%pageSize==0?count/pageSize:(count/pageSize)+1;criteria=session.createCriteria(Emp.class).add(Restrictions.eq("job", "SALESMAN").ignoreCase()).addOrder(Order.desc("sal"));//開始分頁，設置從哪條記錄開始查List<Emp> emplist=criteria.setFirstResult((pageIndex-1)*pageSize).setMaxResults(pageSize).list();for (Emp emp : emplist) {System.out.println(emp.getEname()+","+emp.getSal());}System.out.println("總頁數:"+totalPage);System.err.println("總記錄數："+count);System.out.println("當前頁號："+pageIndex);}
/**
?? ??? ? * 連接查詢
?? ??? ? * Criteria里面只有內連接和迫切做外鏈接
?? ??? ? */
?? ??? ?//查詢RESEARCH部們中姓名包括s的員工

@Testpublic void test16(){List<Emp> emplistList=session.createCriteria(Emp.class).add(Restrictions.ilike("ename", "s",MatchMode.ANYWHERE)).createCriteria("dept").add(Restrictions.eq("dname","RESEARCH").ignoreCase()).list();for (Emp emp : emplistList) {System.out.println(emp.getEname()+","+emp.getDept().getDname());}}//查詢RESEARCH部門中姓名包含s的員工@Testpublic void test17(){List<Emp> empList=session.createCriteria(Emp.class,"e").createAlias("dept", "d").add(Restrictions.ilike("e.ename","s",MatchMode.ANYWHERE)).add(Restrictions.eq("d.dname","RESEARCH").ignoreCase()).list();for (Emp emp : empList) {System.out.println(emp.getEname()+","+emp.getDept().getDname());}}
//左外連接
?? ??? ?//查詢位置在山西呂梁的部門及其人數
?? ??? ?//FetchMode.JOIN表示迫切做外鏈接查詢策略

@Testpublic void test18(){List<Dept> deptList=session.createCriteria(Dept.class,"d").setFetchMode("emps",FetchMode.JOIN).add(Restrictions.eq("d.loc","山西呂梁").ignoreCase()).list();for (Dept dept : deptList) {System.out.println(dept.getDname()+","+dept.getLoc()+","+dept.getEmps().size());}}
//去掉重復數據

@Testpublic void test19(){List<Dept> deptList=session.createCriteria(Dept.class,"d").setFetchMode("emps", FetchMode.JOIN).add(Restrictions.eq("d.loc","山西呂梁").ignoreCase()).list();HashSet<Dept> set=new HashSet<Dept>(deptList);for (Dept dept : set) {System.out.println(dept.getDname()+","+dept.getLoc()+","+dept.getEmps().size());}}
/**
?? ??? ? * 投影，分組，及DetachedCriteria
?? ??? ? */
?? ??? ?//查詢所有的部門名稱】

@Testpublic void test20(){List<String> list=session.createCriteria(Dept.class).setProjection(Property.forName("dname")).list();for (String str : list) {System.out.println(str);}}
//查詢兩個或者兩個以上的屬性
?? ??? ?//查詢員工的姓名和入職時間 @Testpublic void test21(){List<Object[]> list=session.createCriteria(Emp.class).setProjection(Projections.projectionList().add(Property.forName("ename")).add(Property.forName("hiredate"))).list();for (Object[] objects : list) {System.out.println(objects[0]+","+objects[1]);}}
/**
?? ??? ? * 分組
?? ??? ? * 1.groupProperty:分組
?? ??? ? * 2.rowCount():統計記錄數
?? ??? ? * 3.avg:平均值
?? ??? ? * 4.max:最大值
?? ??? ? * 5.min:最小值
?? ??? ? * 6.count:統計某一字段的非空記錄數
?? ??? ? * 7.sum:針對某一字段進行求和
?? ??? ? */
?? ??? ?//統計各個部門的平均工資，最高工資，最低工資

@Testpublic void test22(){List<Object[]> list=session.createCriteria(Emp.class,"e").createAlias("e.dept", "d").setProjection(Projections.projectionList().add(Projections.groupProperty("d.dname")).add(Projections.avg("e.sal")).add(Projections.max("e.sal")).add(Projections.min("e.sal"))).list();for (Object[] objects : list) {System.out.println("部門名稱"+objects[0]+",最高工資："+objects[2]+"" +",平均工資："+objects[1]+",最低工資："+objects[3]);}}
//使用DetachedCriteria
?? ??? ?//查詢RESEARCH部門，姓名包含“a”的員工

@Testpublic void test23(){DetachedCriteria detachedCriteria=DetachedCriteria.forClass(Emp.class,"e").createAlias("e.dept","d").add(Restrictions.eq("d.dname","RESEARCH").ignoreCase()).add(Restrictions.ilike("e.ename","a",MatchMode.ANYWHERE));List<Emp> list=detachedCriteria.getExecutableCriteria(session).list();for (Emp emp : list) {System.out.println(emp.getEname()+","+emp.getDept().getDname());}}
//查詢工資高于平均工資的員工

@Testpublic void test24(){//平均工資DetachedCriteria detachedCriteria=DetachedCriteria.forClass(Emp.class,"e").setProjection(Property.forName("sal").avg());//求工資大于平均工資List<Emp> emplist=session.createCriteria(Emp.class).add(Property.forName("sal").gt(detachedCriteria)).list();for (Emp emp : emplist) {System.out.println(emp.getEname()+","+emp.getSal());}}

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