JDBC调用存储过程

JDBC调用存储过程一般有3种：

  1.无返回值

  2.有一个返回值

  3.返回一个数据集，就是游标！

关键字：call 语法格式{call 存储过程名(参数列表)}

废话不说，见代码！

业务实例：

1.添加员工,如果指定部门不存在,则先添加部门信息,再添加员工（无返回值）

--创建存储过程如下

REPLACE PROCEDURE sp_add_emp1(
   v_empno emp.empno%TYPE,
   v_ename emp.ename%TYPE,
   v_deptno dept.deptno%TYPE,
   v_dname dept.dname%TYPE
)AS
   num1 NUMBER;
   num2 NUMBER;
BEGIN
   SELECT COUNT(*) INTO num1 FROM dept WHERE deptno=v_deptno;
IF(num1=0) THEN
   INSERT INTO dept(deptno,dname) VALUES(v_deptno,v_dname);
END IF;
   SELECT COUNT(*) INTO num2 FROM emp WHERE empno=v_empno;
IF(num2=0)THEN
   INSERT INTO emp(empno,ename,deptno) VALUES(v_empno,v_ename,v_deptno);
ELSE
   raise_application_error(-202021,'员工id 重复！！！');
END IF;
   commit;

END;

Java中调用代码1：

  Class.forName("oracle.jdbc.driver.OracleDriver");
  conn = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl","scott","tiger");
  conn.setAutoCommit(false);

  conn=DBConnection.getDBConnection().getConnection();
  String spName="{call sp_add_emp1(?,?,?,?)}";
  CallableStatement cstmt=conn.prepareCall(spName);
  cstmt.setInt(1, 2);
  cstmt.setString(2, "wwww");
  cstmt.setInt(3, 1);
  cstmt.setString(4, "qwqwq");
  cstmt.executeUpdate();

  conn.close();

2.需求同上, 只是返回该部门的员工总数。（有一个返回值）

--创建存储过程如下

CREATE OR REPLACE PROCEDURE sp_add_emp2(
   v_empno emp.empno%TYPE,
   v_ename emp.ename%TYPE,
   v_deptno dept.deptno%TYPE,
   v_dname dept.dname%TYPE,

   num out number
)AS
   num1 NUMBER;
   num2 NUMBER;
BEGIN
   SELECT COUNT(*) INTO num1 FROM dept WHERE deptno=v_deptno;
IF(num1=0) THEN
   INSERT INTO dept(deptno,dname) VALUES(v_deptno,v_dname);
END IF;
   SELECT COUNT(*) INTO num2 FROM emp WHERE empno=v_empno;
IF(num2=0)THEN
   INSERT INTO emp(empno,ename,deptno) VALUES(v_empno,v_ename,v_deptno);
ELSE
   raise_application_error(-202021,'员工id 重复！！！');
END IF;

   num:=num1;
   commit;

END;

Java中调用代码2：

     Class.forName("oracle.jdbc.driver.OracleDriver");
     conn = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl","scott","tiger");
     conn.setAutoCommit(false);

     conn=DBConnection.getDBConnection().getConnection();

     String spName="{call sp_add_emp2(?,?,?,?,?)}";
     CallableStatement cstmt=conn.prepareCall(spName);
     cstmt.setInt(1,1111);
     cstmt.setString(2, "qqqq");
     cstmt.setInt(3, 50);
     cstmt.setString(4, "pppp");
     cstmt.registerOutParameter(5, java.sql.Types.INTEGER);
     cstmt.executeUpdate();
     int i = cstmt.getInt(5);
     System.out.println(i);
     cstmt.close();
     conn.close();

3.需求同上, 并返回该部门的员工信息(工号和姓名)。（返回一个游标）

--创建存储过程如下

 --1.建包

 CREATE OR REPLACE PACKAGE my_pak AS
  TYPE my_cus IS REF CURSOR  ;
 END my_pak;

 --2.写存储返回过程

CREATE OR REPLACE PROCEDURE sp_add_emp3(
   v_empno emp.empno%TYPE,
   v_ename emp.ename%TYPE,
   v_deptno dept.deptno%TYPE,
   v_dname dept.dname%TYPE,

   p_cus OUT my_pak.my_cus
)AS
   num1 NUMBER;
   num2 NUMBER;
BEGIN

OPEN p_cus FOR select empno,ename into v_empno,v_ename  from emp where deptno =v_deptno 
   SELECT COUNT(*) INTO num1 FROM dept WHERE deptno=v_deptno;
IF(num1=0) THEN
   INSERT INTO dept(deptno,dname) VALUES(v_deptno,v_dname);
END IF;
   SELECT COUNT(*) INTO num2 FROM emp WHERE empno=v_empno;
IF(num2=0)THEN
   INSERT INTO emp(empno,ename,deptno) VALUES(v_empno,v_ename,v_deptno);
ELSE
   raise_application_error(-202021,'员工id 重复！！！');
END IF;
   commit;

END;

Java中调用代码3：

     Class.forName("oracle.jdbc.driver.OracleDriver");
     conn = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl","scott","tiger");
     conn.setAutoCommit(false);

     conn=DBConnection.getDBConnection().getConnection();

     String spName="{call sp_add_emp2(?,?,?,?,?)}";
     CallableStatement cstmt=conn.prepareCall(spName);
     cstmt.setInt(1,1111);
     cstmt.setString(2, "qqqq");
     cstmt.setInt(3, 50);
     cstmt.setString(4, "pppp");
     cstmt.registerOutParameter(5, java.sql.Types.ORACLETYPE);
     cstmt.executeUpdate();
     int i = cstmt.getInt(5);
     System.out.println(i);
     cstmt.close();
     conn.close();