DeptTest.java
测试类：
先创建Session：
private Session session;
private Transaction tx;
@Before
public void beforeMethod(){
session=new Configuration()
.configure()
.buildSessionFactory()
.openSession();
}关闭Session：
@After
public void afterMethod() {
if (session != null) {
session.close();
}
}
开始测试：
/**
* 测试简单查询
*/
@Test
public void testMethod1() {
//查询所有的部门
Criteria criteria=session.createCriteria(Dept.class);
List<Dept> deptList=criteria.list();
for (Dept dept : deptList) {
System.out.println("部门编号："+dept.getDeptno());
System.out.println("部门名称："+dept.getDname());
System.out.println("部门编地址："+dept.getLoc());
}
}查詢部门在山西吕梁的部门名称
//查询部门地址在山西吕梁的部门名称
@Test
public void test2(){
List<Dept> deptList=session.createCriteria(Dept.class)
.add(Restrictions.eq("loc", "山西吕梁")).list();
for (Dept dept : deptList) {
System.out.println(dept.getDeptno()+","+dept.getDname());
}
}//查询工资高于5000的员工
@Test
public 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());
}
}
//查询不属于任何部门的员工
@Test
public void test4(){
List<Emp> empList=session.createCriteria(Emp.class)
.add(Restrictions.isNull("dept")).list();
for (Emp emp : empList) {
System.out.println(emp.getEname());
}
}
//查询职位是CLERK的员工
//ignoreCase:不区分大小写
@Test
public 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:等于列表中的某一个值
* not in:不等于列表中的任何一个值
* 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
*/
//查询职位是ANALYST 或 SALESMAN 的员工
@Test
public 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());
}
}
//查询工资在2000元到4000元的员工
@Test
public 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，忽略大小写
*/
//查询姓名中包括s的职位(like)
@Test
public void test8(){
List<Emp> empList=session.createCriteria(Emp.class)
.add(Restrictions.like("job","%s%"))
.list();
for (Emp emp : empList) {
System.out.println(emp.getEname());
}
}
//查询姓名中包括s的职位(ilike)
@Test
public 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静态常量
* 1.MatchMode.STRART: 员工姓名以s开头
* 2.MatchMode.END： 员工姓名以s结尾
* 3.MatchMode.ANYWHERE 员工姓名中包含s
* 4.MatchMode.EXACT 员工姓名中等于s精确匹配
*/
//查询职位中包括s的职位
@Test
public 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());
}
}
/**
*逻辑运算
*1.and:逻辑与
*2.or:逻辑或
*3.not:逻辑非
*/
//查询职位是accountant 或者是analyert的职位名称
@Test
public 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());
}
}
//查询职位是accountant 或者是analyert 或者是 engineer的职位名称
@Test
public 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());
}
}
/**
* 集合运算符
* 1. is empty:集合为空，不包含任何元素
* 2. is not empty：集合不为空
*/
//查询没有员工的部门
@Test
public void test13(){
List<Dept> deptList=session.createCriteria(Dept.class)
.add(Restrictions.isEmpty("emps"))
.list();
for (Dept dept : deptList) {
System.out.println(dept.getDname());
}
}
/**
* 动态查询
* 条件见下：（条件类：EmpCondition）
* 1.job是engineer
* 2.sal大于2000
* 3.入职时间在2006年12月31日到2008年12月31日之前
*/
@Test
public 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 block
e.printStackTrace();
}
//添加动态查询的条件
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()));
}
//输出
List<Emp>emplist=criteria.list();
for (Emp emp : emplist) {
System.err.println(emp.getEname()+","+emp.getJob()+","+emp.getSal()+","+emp.getHiredate());
}
}
/**
* 分页查询
*/
//分页查询部门是SALESMAN 的所有员工
//并且工资降序
//显示总页数，总记录数，当前页号
@Test
public void test15(){
Criteria criteria =session.createCriteria(Emp.class)
.add(Restrictions.eq("job", "SALESMAN").ignoreCase())
.setProjection(Projections.count("empno"));
//获得总记录数
Integer count=(Integer)criteria.uniqueResult();
//分页
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"));
//开始分页，设置从哪条记录开始查
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("总页数:"+totalPage);
System.err.println("总记录数："+count);
System.out.println("当前页号："+pageIndex);
}
/**
* 连接查询
* Criteria里面只有内连接和迫切做外链接
*/
//查询RESEARCH部们中姓名包括s的员工
@Test
public 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());
}
}
//查询RESEARCH部门中姓名包含s的员工
@Test
public 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());
}
}
//左外连接
//查询位置在山西吕梁的部门及其人数
//FetchMode.JOIN表示迫切做外链接查询策略
@Test
public void test18(){
List<Dept> deptList=session.createCriteria(Dept.class,"d")
.setFetchMode("emps",FetchMode.JOIN)
.add(Restrictions.eq("d.loc","山西吕梁").ignoreCase())
.list();
for (Dept dept : deptList) {
System.out.println(dept.getDname()+","+dept.getLoc()+","+dept.getEmps().size());
}
}
//去掉重复数据
@Test
public void test19(){
List<Dept> deptList=session.createCriteria(Dept.class,"d")
.setFetchMode("emps", FetchMode.JOIN)
.add(Restrictions.eq("d.loc","山西吕梁").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，分组，及DetachedCriteria
*/
//查询所有的部门名称】
@Test
public void test20(){
List<String> list=session.createCriteria(Dept.class)
.setProjection(Property.forName("dname"))
.list();
for (String str : list) {
System.out.println(str);
}
}
//查询两个或者两个以上的属性
//查询员工的姓名和入职时间
@Test
public 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]);
}
}
/**
* 分组
* 1.groupProperty:分组
* 2.rowCount():统计记录数
* 3.avg:平均值
* 4.max:最大值
* 5.min:最小值
* 6.count:统计某一字段的非空记录数
* 7.sum:针对某一字段进行求和
*/
//统计各个部门的平均工资，最高工资，最低工资
@Test
public 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("部门名称"+objects[0]+",最高工资："+objects[2]+"" +
",平均工资："+objects[1]+",最低工资："+objects[3]);
}
}
//使用DetachedCriteria
//查询RESEARCH部门，姓名包含“a”的员工
@Test
public 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());
}
}
//查询工资高于平均工资的员工
@Test
public void test24(){
//平均工资
DetachedCriteria detachedCriteria=DetachedCriteria
.forClass(Emp.class,"e")
.setProjection(Property.forName("sal").avg());
//求工资大于平均工资
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());
}
}
