Oracle存储过程及JDBC调用大全

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Oracle存储过程及JDBC调用大全(原创)
-----------------无返回值示例------------------------
存储过程：
·添加学生,如果班级不存在,则先添加班级信息,再添加学生。

create or replace procedure sp_add_stu (   p_stu_id t_stu.s_id%type, --参数类型定义为字段类型   p_s_name t_stu.s_name%type,   p_c_id t_class.c_id%type ) as   num number;   new_name t_stu.s_name%type; begin   --处理姓名(如果不从查询结果取值,用 := )   new_name := substr(trim(p_s_name),1,8);     --将查询结果保存到变量,只能用select into    select count(*) into num from t_class c where c.c_id=p_c_id;    if(num=0) then        insert into t_class(c_id,c_name) values(p_c_id,'新班');     end if;       insert into t_stu(s_id,s_name,c_id,s_sex)   values(p_stu_id,new_name,p_c_id,'1');       commit;     dbms_output.put_line('执行完毕'); end;

 -----------------在Oracle中调用(无返回值)-----------------

SQL> call sp_add_stu(800,'李小龙',88);   Method called   SQL>

 
-----------------JDBC调用(无返回值)-----------------
Connection conn = null;
CallableStatement cstmt = null;
conn = DriverManager.getConnection(url, user, password);
String procedure = "{call sp_add_stu(?,?,?)}";
cstmt = conn.prepareCall(procedure);
cstmt.setString(1, "2000");
cstmt.setString(2, "张三);
cstmt.setString(3, "40");
cstmt.executeUpdate();
-----------------返回结果值示例------------------------
·指定参数为out类型即可返回值

/** 存储过程与函数的区别：存储过程可以增删改,可以提交或回滚,而函数不能。 函数只能计算   如处理某个单据(进货单),如输入用户帐号,经过复杂处理以后, 返回此用户的欠费单据号 */ create or replace procedure sp_value( id1 in number, id2 out number ) as begin   id2 := id1*200; end;

 
-----------------调用(有简单返回值)----------------
Connection conn = null;
CallableStatement cstmt = null;
conn = DriverManager.getConnection(url, user, password);
String procedure = "{call sp_value(?,?)}";
cstmt = conn.prepareCall(procedure);
--------------------JDBC获取存储过程中的值-------------------
//学号、姓名、班级编号
cstmt.setString(1, "2000");
//注册输出参数
cstmt.registerOutParameter(2, java.sql.Types.INTEGER);
cstmt.executeUpdate();
//从输出参数中获取值
int value = cstmt.getInt(2);
System.out.println("返回： "+value);
 
 
-----------------返回结果集示例------------------------
·建包,包中定义游标类型变量
CREATE OR REPLACE PACKAGE TESTPACKAGE  AS
    TYPE Test_CURSOR IS REF CURSOR; --自定义一个引用游标类型
end;
 
·存储过程返回指定游标类型变量
 
CREATE OR REPLACE PROCEDURE sp_select_stu
(
p_c_id t_class.c_id%type,
p_cursor       out TESTPACKAGE.Test_CURSOR
自定义变量名   输出  变量所对应的数据类型(在包中自定义的)    
) IS
BEGIN
OPEN p_CURSOR FOR
   SELECT s.stu_id,s.s_name,to_char(s.s_birthday,'yy.mm') FROM t_stu s
   where s.c_id=p_c_id
   order by s.s_name;
END;
 
-----------------JDBC获取存储过程中的结果集---------------
Connection conn = null;
CallableStatement cstmt = null;
conn = DriverManager.getConnection(url, user, password);
String procedure = "{call sp_select_stu(?,?)}";
cstmt = conn.prepareCall(procedure);
//学号、姓名、班级编号
cstmt.setString(1, "C01");
//注册输出参数
cstmt.registerOutParameter(2, oracle.jdbc.OracleTypes.CURSOR);
cstmt.execute();
//从输出参数中获取值
ResultSet rs = (ResultSet)cstmt.getObject(2);//第2个?所代表的参数
 
ResultSetMetaData rmd =rs.getMetaData();
while(rs.next()){
for(int i=0;i<rmd.getColumnCount();i++){
  System.out.print(rs.getString(i+1)+" ");
}
System.out.println("");
}
rs.close();