Java调用Oracle的存储过程、存储函数

Java调用Oracle的存储过程、存储函数，存储过程

create or replace procedure queryEmpInfo(eno in number,
                                         pename out varchar2,
                                         psal   out number,
                                         pjob   out varchar2)
as
begin
  select ename,sal,empjob into pename,psal,pjob from emp where empno=eno;

end;
/

Java代码

@Test
    public void testProcedure(){
        //{call [(,, ...)]}
        String sql = "{call queryEmpInfo(?,?,?,?)}";

        Connection conn = null;
        CallableStatement call = null;
        try {
            conn = JDBCUtils.getConnection();
            call = conn.prepareCall(sql);

            //对于in参数，赋值
            call.setInt(1, 7839);

            //对于out参数,申明
            call.registerOutParameter(2, OracleTypes.VARCHAR);
            call.registerOutParameter(3, OracleTypes.NUMBER);
            call.registerOutParameter(4, OracleTypes.VARCHAR);

            //执行
            call.execute();

            //取出结果
            String name = call.getString(2);
            double sal = call.getDouble(3);
            String job = call.getString(4);

            System.out.println(name);
            System.out.println(sal);
            System.out.println(job);
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            JDBCUtils.release(conn, call, null);
        }
    }

存储函数

create or replace function queryEmpIncome(eno in number)
return number
as
  psal emp.sal%type;
  pcomm emp.comm%type;
begin

  select sal,comm into psal,pcomm from emp where empno=eno;

  return psal*12+nvl(pcomm,0);
end;
/

Java代码

@Test
    public void testFunction(){
        // {?= call [(,, ...)]}
        String sql = "{?=call queryEmpIncome(?)}";

        Connection conn = null;
        CallableStatement call = null;
        try {
            conn = JDBCUtils.getConnection();
            call = conn.prepareCall(sql);

            //对于out参数,申明
            call.registerOutParameter(1, OracleTypes.NUMBER);           

            //对于in参数，赋值
            call.setInt(2, 7839);

            //执行
            call.execute();

            //取出结果
            double income = call.getDouble(1);
            System.out.println(income);
        }catch (Exception e) {
            e.printStackTrace();
        }finally{
            JDBCUtils.release(conn, call, null);
        }
    }   

某个部门中 所有员工的所有信息，返回值是一个集合

--包头
CREATE OR REPLACE PACKAGE MYPACKAGE AS 

  type empcursor is ref cursor;
  procedure queryEmpList(dno in number,empList out empcursor);

END MYPACKAGE;


--包体
CREATE OR REPLACE PACKAGE BODY MYPACKAGE AS

  procedure queryEmpList(dno in number,empList out empcursor) AS
  BEGIN

    open empList for select * from emp where deptno=dno;

  END queryEmpList;

END MYPACKAGE;

Java代码

@Test
    public void testCursor(){
        String sql = "{call MYPACKAGE.queryEmpList(?,?)}";

        Connection conn = null;
        CallableStatement call = null;
        ResultSet rs = null;
        try {
            conn = JDBCUtils.getConnection();
            call = conn.prepareCall(sql);

            //对于in参数，赋值
            call.setInt(1, 20);

            //对于out参数,申明
            call.registerOutParameter(2, OracleTypes.CURSOR);

            //执行
            call.execute();

            //取出结果
            rs = ((OracleCallableStatement)call).getCursor(2);
            while(rs.next()){
                String name = rs.getString("ename");
                double sal = rs.getDouble("sal");

                System.out.println(name+"的薪水是"+sal);
            }

        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            JDBCUtils.release(conn, call, rs);
        }
    }

JDBCUtils

package demo.utils;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class JDBCUtils {

    private static String driver = "oracle.jdbc.OracleDriver";
    private static String url = "jdbc:oracle:thin:@localhost:1521:orcl";
    private static String user  = "scott";
    private static String password = "tiger";

    static{
        //DriverManager.registerDriver(new oracle.jdbc.OracleDriver());

        try {
            Class.forName(driver);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }

    public static Connection getConnection(){
        try {
            return DriverManager.getConnection(url, user, password);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void release(Connection conn, Statement st, ResultSet rs){
        if(rs != null){
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }finally{
                rs = null;
            }
        }
        if(st != null){
            try {
                st.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }finally{
                st = null;
            }
        }
        if(conn != null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }finally{
                conn = null;
            }
        }
    }
}