JDBC -访问存储过程

存储过程：

create  procedure queryempinform (eno in  emp.empno%type ,
                                  pename out  emp.ename%type,
                                  psal out  emp.sal%type,
                                  pjob out  emp.job%type ) 
as
begin
     select ename,sal,job into pename ,psal,pjob from emp where empno = eno;
end;

JDBCUtils类

package Procedure;

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.driver.OracleDriver";
    private static String  url ="jdbc:oracle:thin:@127.0.0.1:1521:orcl";//127.0.0.1是本机地址，1521是oracle数据库的默认监听端口。
    private static String user="scott";
    private static String password ="tiger";
    //注册数据库的驱动
    static {
        try {
            Class.forName(driver);//加载oracle驱动程序
            //DriverManager.registerDriver(driver);
        } catch (ClassNotFoundException e) {
            throw new ExceptionInInitializerError(e);
        }
    }
    //获取连接
    public static Connection getConnection() {
        try {
            return DriverManager.getConnection(url, user, password);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;

    }
    //释放资源
    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;
            }
        }
    }
}

测试类

package Procedure;

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

import oracle.jdbc.OracleTypes;


public class TestProcedure {

    public static void main(String[] args) throws SQLException {
        //{call  [(,,...)]}
        String sql = "{call queryempinform(?,?,?,?)}";//预编译语句

        Connection conn = null;
        CallableStatement call = null;

        try {
            // 得到一个连接
            conn = JDBCUtils.getConnection();
            // 通过连接创建出statement
            call = conn.prepareCall(sql);//实例化预编译语句
            // 对于in输入参数，需要赋值
            call.setInt(1, 7839);//1表示参数的索引,而非列中索引
            // 对于out输出参数，需要申明           
            call.registerOutParameter(2, OracleTypes.VARCHAR);
            call.registerOutParameter(3, OracleTypes.NUMBER);
            call.registerOutParameter(4, OracleTypes.VARCHAR);
            // 执行调用
            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 + '\t' + sal + '\t' + job);
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            //释放连接
            JDBCUtils.release(conn, call, null);
        }

    }

}