Java 如何调用 oracle 的存储过程

通过命令行创建存储过程

create or replace procedure emp_sal(eno emp.empno%type,esal out emp.sal%type)
as
begin
  select sal into esal from emp where empno=eno;
end;

PL/SQL 中测试存储过程

依次打开 File -> New -> TestWindow 窗口，执行如下代码：

-- Created on 2018/11/19 by ADMINISTRATOR 
declare 
  -- Local variables here
  v_sal emp.sal%TYPE;
begin
  -- Test statements here
  emp_sal(7369,v_sal);
  dbms_output.put_line(v_sal);
end;

Java 中如何调用存储过程

导入 jdbc 连接 oracle 的架包 ojdbc7

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Types;

public class TestJDBCProcedure {
    public static void main(String[] args) {
        Connection conn = null;
        CallableStatement cs = null;
        try {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            conn = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:orcl", "scott", "123456");
            cs = conn.prepareCall("call emp_sal(?,?)");
            cs.setInt(1, 7369);
            cs.registerOutParameter(2, Types.FLOAT);
            cs.execute();
            float sal = cs.getFloat(2);
            System.out.println("薪资：" + sal);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            if (conn != null) {
                try {
                    cs.close();
                    conn.close();
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

运行结果
薪资：800.0