Java调用Oracle存储过程详解

Java调用Oracle存储过程详解

步骤：

1、编写Oracle存储过程

2、编写数据库获取连接工具类

3、编写简单应用调用存储过程

实现：

1、Oracle存储过程：

/*测试表*/
create table test(
  id varchar2(32),
  name varchar2(32)
);

/*存储过程 插入数据*/
CREATE OR REPLACE PROCEDURE insert_procedure(
  PARA1 IN VARCHAR2,
  PARA2 IN VARCHAR2
) AS
BEGIN
 INSERT INTO test (id, name) VALUES (PARA1, PARA2);
END insert_procedure;

/*存储过程 返回结果集*/
CREATE OR REPLACE PROCEDURE select_procedure(
  para_id IN VARCHAR2,
  name OUT sys_refcursor /* 这个sys_refcursor类型在SYS.STANDARD包中 */
) AS
BEGIN
 OPEN name FOR
  SELECT * FROM test WHERE id = para_id;
END;

2、JDBC工具类

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

public class DBUtil {
  public static final String DRIVER = "oracle.jdbc.driver.OracleDriver";
  public static final String URL = "jdbc:oracle:thin:@localhost:1521/orcl";
  public static final String USERNAME = "pfm";
  public static final String PASSWORD = "pfm";

  /**
   * 通过静态代码块 注册数据库驱动
   */
  static {
    try {
      Class.forName(DRIVER);
    } catch (ClassNotFoundException e) {
      e.printStackTrace();
    }
  }

  /**
   * 获得Connection
   *
   * @return
   */
  public static Connection getConnection() {
    Connection conn = null;
    try {
      conn = DriverManager.getConnection(URL, USERNAME, PASSWORD);
    } catch (SQLException e) {
      e.printStackTrace();
    }
    return conn;
  }

  /**
   * 获得Statement
   *
   * @return
   */
  public static Statement getStatement() {
    Statement st = null;
    try {
      st = getConnection().createStatement();
    } catch (SQLException e) {
      e.printStackTrace();
    }
    return st;
  }

  /**
   * 关闭ResultSet
   *
   * @param rs
   */
  public static void closeResultSet(ResultSet rs) {
    if (rs != null) {
      try {
        rs.close();
      } catch (SQLException e) {
        e.printStackTrace();
      }
    }
  }

  /**
   * 关闭Statement
   *
   * @param st
   */
  public static void closeStatement(Statement st) {
    if (st != null) {
      try {
        st.close();
      } catch (SQLException e) {
        e.printStackTrace();
      }
    }
  }

  /**
   * 关闭Connection
   *
   * @param conn
   */
  public static void closeConnection(Connection conn) {
    if (conn != null) {
      try {
        conn.close();
      } catch (SQLException e) {
        e.printStackTrace();
      }
    }
  }

  /**
   * 关闭全部
   *
   * @param rs
   * @param sta
   * @param conn
   */
  public static void closeAll(ResultSet rs, Statement sta, Connection conn) {
    closeResultSet(rs);
    closeStatement(sta);
    closeConnection(conn);
  }

}

3、调用存储过程：

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import oracle.jdbc.driver.OracleTypes;

/**
 * 测试调用存储过程
 *
 */
public class StoredTest {
  public static void main(String[] args) {
    insert_call();
    //select_call();
  }

  /**
   * 执行存储过程 插入数据
   */
  public static void insert_call() {
    Connection conn = DBUtil.getConnection();
    PreparedStatement pst = null;

    CallableStatement proc = null; // 创建执行存储过程的对象
    try {
      proc = conn.prepareCall("{ call insert_procedure(?,?) }");
      proc.setString(1, "1"); // 设置第一个输入参数
      proc.setString(2, "hello call"); // 设置第一个输入参数
      proc.execute();// 执行

    } catch (SQLException e) {
      e.printStackTrace();
    } finally {
      try {
        // 关闭IO流
        proc.close();
        DBUtil.closeAll(null, pst, conn);
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }

  /**
   * 执行存储过程 查询数据
   */
  public static void select_call() {
    Connection conn = DBUtil.getConnection();

    CallableStatement stmt;
    try {
      stmt = conn.prepareCall("{ call select_procedure(?, ?) }"); // 用此调用方法不能实现多行语法
      stmt.setString(1, "1");
      stmt.registerOutParameter(2, OracleTypes.CURSOR);
      stmt.execute();
      ResultSet rs = (ResultSet) stmt.getObject(2);
      while (rs.next()) {
        System.out.println(rs.getString("name"));
      }
    } catch (SQLException e) {
      e.printStackTrace();
    } finally {
      DBUtil.closeConnection(conn);
    }
  }
}

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