JDBC調用存儲過程

JDBC調用存儲過程一般有3種：

1.無返回值

2.有一個返回值

3.返回一個數據集，就是遊標！

關鍵字：call 語法格式{call 存儲過程名(參數列表)}

廢話不說，見代碼！

業務實例：

1.添加員工,如果指定部門不存在,則先添加部門信息,再添加員工（無返回值）

--創建存儲過程如下

CREATE OR 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,'員工id 重複！！！');
END IF;
   commit;

END;

Java中調用代碼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, 只是返回該部門的員工總數。（有一個返回值）

--創建存儲過程如下

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,'員工id 重複！！！');
END IF;

   num:=num1;
   commit;

END;

Java中調用代碼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, 並返回該部門的員工信息(工號和姓名)。（返回一個遊標）

--創建存儲過程如下

 --1.建包

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

 --2.寫存儲返回過程

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,'員工id 重複！！！');
END IF;
   commit;

END;

Java中調用代碼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();