准备工作
数据库emp表(oracle里scott/tiger自带的表)
-- Create table
create table EMP
(
empno NUMBER(4) not null,
ename VARCHAR2(10),
job VARCHAR2(9),
mgr NUMBER(4),
hiredate DATE,
sal NUMBER(7,2),
comm NUMBER(7,2),
deptno NUMBER(2)
)
tablespace USERS
pctfree 10
initrans 1
maxtrans 255
storage
(
initial 64K
next 1M
minextents 1
maxextents unlimited
);
-- Create/Recreate primary, unique and foreign key constraints
alter table EMP
add constraint PK_EMP primary key (EMPNO)
using index
tablespace USERS
pctfree 10
initrans 2
maxtrans 255
storage
(
initial 64K
next 1M
minextents 1
maxextents unlimited
);
alter table EMP
add constraint FK_DEPTNO foreign key (DEPTNO)
references DEPT (DEPTNO);
-------------------------------------------
1 7369 SMITH CLERK 7902 1980/12/17 星期三 800.00 20
2 7499 ALLEN SALESMAN 7698 1981/2/20 星期五 1600.00 300.00 30
3 7521 WARD SALESMAN 7698 1981/2/22 星期日 1250.00 500.00 30
4 7566 JONES MANAGER 7839 1981/4/2 星期四 2975.00 20
5 7654 MARTIN SALESMAN 7698 1981/9/28 星期一 1250.00 1400.00 30
6 7698 BLAKE MANAGER 7839 1981/5/1 星期五 2850.00 30
7 7782 CLARK MANAGER 7839 1981/6/9 星期二 2450.00 10
8 7788 SCOTT ANALYST 7566 1987/4/19 星期日 3000.00 20
9 7839 KING PRESIDENT 1981/11/17 星期二 5000.00 10
10 7844 TURNER SALESMAN 7698 1981/9/8 星期二 1500.00 0.00 30
11 7876 ADAMS CLERK 7788 1987/5/23 星期六 1100.00 20
12 7900 JAMES CLERK 7698 1981/12/3 星期四 950.00 30
13 7902 FORD ANALYST 7566 1981/12/3 星期四 3000.00 20
14 7934 MILLER CLERK 7782 1982/1/23 星期六 1300.00 10
创建对应的类
@Entity(name="EMP")
public class Employee {
@Id
private Integer empno;
private String ename;
private String job;
private Integer mgr;
private Date hiredate;
private Double sal;
private Double comm;
private Integer deptno;
public Integer getEmpno() {
return empno;
}
public void setEmpno(Integer empno) {
this.empno = empno;
}
public String getEname() {
return ename;
}
public void setEname(String ename) {
this.ename = ename;
}
public String getJob() {
return job;
}
public void setJob(String job) {
this.job = job;
}
public Integer getMgr() {
return mgr;
}
public void setMgr(Integer mgr) {
this.mgr = mgr;
}
public Date getHiredate() {
return hiredate;
}
public void setHiredate(Date hiredate) {
this.hiredate = hiredate;
}
public Double getSal() {
return sal;
}
public void setSal(Double sal) {
this.sal = sal;
}
public Double getComm() {
return comm;
}
public void setComm(Double comm) {
this.comm = comm;
}
public Integer getDeptno() {
return deptno;
}
public void setDeptno(Integer deptno) {
this.deptno = deptno;
}
@Override
public String toString() {
return "Employee{" +
"empno=" + empno +
", ename='" + ename + '\'' +
", job='" + job + '\'' +
", mgr=" + mgr +
", hiredate=" + hiredate +
", sal=" + sal +
", comm=" + comm +
", deptno=" + deptno +
'}';
}
}
定义接口
public interface EmployeeReposity extends Repository<Employee,Integer> {
//定义根据工资sal查询员工信息
List<Employee>findAllBySal(Double sal);
}
测试
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:applicationContext.xml"})
public class TestJPARepositoty {
@Autowired
private EmployeeReposity employeeReposity;
@Test
public void test() {
//查询工资三千的员工信息
List<Employee> employeeList = employeeReposity.findAllBySal(3000.0);
for (Employee employee : employeeList) {
System.out.println(employee);
}
}
}
---------------------------------------
运行结果：
Employee{empno=7788, ename='SCOTT', job='ANALYST', mgr=7566, hiredate=1987-04-19, sal=3000.0, comm=null, deptno=20}
Employee{empno=7902, ename='FORD', job='ANALYST', mgr=7566, hiredate=1981-12-03, sal=3000.0, comm=null, deptno=20}
