構建高性能系統需要的-JDBC存儲過程調用

1.無參數無返回值存儲過程調用

--存儲過程
create or replace procedure addEmp_pro 
as 
begin
	insert into emp values(emp_seq.nextval,'Tom',1000);
	commit;
end;
//JDBC調用
    @Test
    public void test0() throws Exception {
        Connection conn = getConn();
        CallableStatement call = conn.prepareCall("{CALL addEmp_pro()}");
        call.execute();
    }

2.無參數有返回值

--存儲過程
create or replace procedure addEmp_pro1(eid out emp.id%type) 
as 
begin
  select emp_seq.nextval into eid from dual;
  insert into emp values(eid,'Tom',1000);
  commit;
end;
//JDBC調用
 	@Test
    public void test0() throws Exception {
        Connection conn = getConn();
        CallableStatement call = conn.prepareCall("{CALL addEmp_pro1(?)}");
        //必須註冊返回值類型
        call.registerOutParameter(1, OracleTypes.NUMBER);
        call.execute();
        int id = call.getInt(1);
        System.out.println("添加成功，編號是："+id);
    }

3.無參數返回值爲遊標類型

--存儲過程
create or replace procedure findAllEmp_pro( cur_emp OUT sys_refcursor)
	as
begin
	open cur_emp for select * from emp;
end;
//JDBC調用
    @Test
    public void test1() throws Exception {
        Connection conn = getConn();
        CallableStatement call = conn.prepareCall("{CALL findAllEmp_pro(?)}");
        //必須註冊返回值類型
        call.registerOutParameter(1, OracleTypes.CURSOR);
        call.execute();
        //結果集處理
        OracleCallableStatement oracleCallableStatement = (OracleCallableStatement) call;
        ResultSet rs = oracleCallableStatement.getCursor(1);
        List<Emp> emps = new ArrayList<>();
        while (rs.next()) {
            Emp emp = new Emp();
            emp.setId(rs.getInt(1));
            emp.setName(rs.getString(2));
            emp.setSalary(rs.getDouble(3));
            emps.add(emp);
        }

        for (Emp emp : emps) {
            System.out.println(emp);
        }
    }

4.有參數無返回值

--存儲過程
create or replace procedure addEmp_pro3(ename emp.name%type,esalary emp.salary%type) 
as 
begin
	insert into emp values(emp_seq.nextval,ename,esalary);
	commit;
end;
//JDBC調用
    @Test
    public void test2() throws Exception {
        Connection conn = getConn();
        CallableStatement call = conn.prepareCall("{CALL addEmp_pro3(?,?)}");
        call.setString(1,"Jerry");
        call.setDouble(2,2000.0);
        call.execute();
    }

5.有參數有返回值

--存儲過程
create or replace procedure findEmpById_pro(eid in out number,ename out varchar2,esalary out number)
  as
begin
  select * into eid,ename,esalary from emp where id=eid;
end;

//JDBC調用
    @Test
    public void test3() throws Exception {
        Connection conn = getConn();
        CallableStatement call = conn.prepareCall("{CALL findEmpById_pro(?,?,?)}");
        //必須註冊返回值類型
        call.registerOutParameter(1, OracleTypes.NUMBER);
        call.registerOutParameter(2, OracleTypes.VARCHAR);
        call.registerOutParameter(3, OracleTypes.NUMBER);
        call.setInt(1,100);
        call.execute();
        int id = call.getInt(1);
        String name = call.getString(2);
        double salary = call.getDouble(3);
        System.out.println(id+"\t"+name+"\t"+salary);
    }

6.有參數返回值爲遊標類型

--存儲過程
create or replace procedure findEmpBySalary_pro(esalary number,cur_emp OUT sys_refcursor)
  as
begin
  open cur_emp for select * from emp where salary=esalary;
end;

//JDBC調用
    @Test
    public void test4() throws Exception {
        Connection conn = getConn();
        CallableStatement call = conn.prepareCall("{CALL findEmpBySalary_pro(?,?)}");
        call.setDouble(1,10000.0);
        //必須註冊返回值類型
        call.registerOutParameter(2, OracleTypes.CURSOR);

        call.execute();
        //結果集處理
        OracleCallableStatement oracleCallableStatement = (OracleCallableStatement) call;
        ResultSet rs = oracleCallableStatement.getCursor(2);
        List<Emp> emps = new ArrayList<>();
        while (rs.next()) {
            Emp emp = new Emp();
            emp.setId(rs.getInt(1));
            emp.setName(rs.getString(2));
            emp.setSalary(rs.getDouble(3));
            emps.add(emp);
        }

        for (Emp emp : emps) {
            System.out.println(emp);
        }
    }

附測試數據

drop table emp;

create table emp(
id number(9) primary key,
name varchar2(50),
salary number(9,3)
);


insert into emp select employee_id,first_name,salary from employees;

commit;


select * from emp;