【学习】java下实现调用oracle的存储过程和函数
在oracle下创建一个test的账户，然后按一下步骤执行：
1.创建表：STOCK_PRICES
--创建表格CREATETABLE STOCK_PRICES( RIC VARCHAR(6) PRIMARYKEY, PRICE NUMBER(7,2), UPDATED DATE );
2.插入测试数据：
--插入数据INSERTINTO stock_prices values('1111',1.0,SYSDATE);INSERTINTO stock_prices values('1112',2.0,SYSDATE);INSERTINTO stock_prices values('1113',3.0,SYSDATE);INSERTINTO stock_prices values('1114',4.0,SYSDATE);
3.建立一个返回游标： PKG_PUB_UTILS
--建立一个返回游标CREATEORREPLACE PACKAGE PKG_PUB_UTILS IS--动态游标 TYPE REFCURSOR IS REF CURSOR;END PKG_PUB_UTILS;
4.创建和存储过程：P_GET_PRICE
--创建存储过程CREATEORREPLACEPROCEDURE P_GET_PRICE( AN_O_RET_CODE OUT NUMBER, AC_O_RET_MSG OUT VARCHAR2, CUR_RET OUT PKG_PUB_UTILS.REFCURSOR, AN_I_PRICE INNUMBER) ISBEGIN AN_O_RET_CODE :=0; AC_O_RET_MSG :='操作成功'; OPEN CUR_RET FORSELECT*FROM STOCK_PRICES WHERE PRICE< span>AN_I_PRICE;EXCEPTION WHEN OTHERS THEN AN_O_RET_CODE :=-1; AC_O_RET_MSG :='错误代码:'|| SQLCODE || CHR(13) ||'错误信息:'|| SQLERRM;END P_GET_PRICE;
5.创建函数：
--创建函数：F_GET_PRICECREATEORREPLACEFUNCTION F_GET_PRICE(v_price INNUMBER) RETURN PKG_PUB_UTILS.REFCURSORAS stock_cursor PKG_PUB_UTILS.REFCURSOR;BEGINOPEN stock_cursor FORSELECT*FROM stock_prices WHERE price < span> v_price; RETURN stock_cursor;END;
6.JAVA调用存储过程返回结果集
代码示例：JDBCoracle10G_INVOKEPROCEDURE.java
import java.sql.*;import oracle.jdbc.OracleCallableStatement;import oracle.jdbc.OracleTypes;/* 本例是通过调用oracle的存储过程来返回结果集: * oracle 9i、10G 的jdbc由1个jar包组成：classes12.zip */publicclass JDBCoracle10G_INVOKEPROCEDURE { Connection conn = null; Statement statement = null; ResultSet rs = null; CallableStatement stmt = null; String driver; String url; String user; String pwd; String sql; String in_price; public JDBCoracle10G_INVOKEPROCEDURE() { driver = "oracle.jdbc.driver.OracleDriver"; url = "jdbc:oracle:thin:@localhost:1521:ORCL"; // oracle 用户 user = "test"; // oracle 密码 pwd = "test"; init(); // mysid：必须为要连接机器的sid名称，否则会包以下错： // java.sql.SQLException: Io 异常: Connection // refused(DESCRIPTION=(TMP=)(VSNNUM=169870080)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4)))) // 参考连接方式: // Class.forName( "oracle.jdbc.driver.OracleDriver" ); // cn = DriverManager.getConnection( // "jdbc:oracle:thin:@MyDbComputerNameOrIP:1521:ORCL", sUsr, sPwd ); } publicvoid init() { System.out.println("oracle jdbc test"); try { Class.forName(driver); System.out.println("driver is ok"); conn = DriverManager.getConnection(url, user, pwd); System.out.println("conection is ok"); statement = conn.createStatement(); // conn.setAutoCommit(false); // 输入参数 in_price = "3.0"; // 调用函数 stmt = conn.prepareCall("call P_GET_PRICE(?,?,?,?)"); stmt.registerOutParameter(1, java.sql.Types.FLOAT); stmt.registerOutParameter(2, java.sql.Types.CHAR); stmt.registerOutParameter(3, oracle.jdbc.OracleTypes.CURSOR); stmt.setString(4, in_price); stmt.executeUpdate(); int retCode = stmt.getInt(1); String retMsg = stmt.getString(2); if (retCode == -1) { // 如果出错时，返回错误信息 System.out.println("报错！"); } else { // 取的结果集的方式一： rs = ((OracleCallableStatement) stmt).getCursor(3); // 取的结果集的方式二： // rs = (ResultSet) stmt.getObject(3); String ric; String price; String updated; // 对结果进行输出while (rs.next()) { ric = rs.getString(1); price = rs.getString(2); updated = rs.getString(3); System.out.println("ric:" + ric + ";-- price:" + price + "; --" + updated + "; "); } } } catch (Exception e) { e.printStackTrace(); } finally { System.out.println("close "); } } publicstaticvoid main(String args[])// 自己替换［］ { new JDBCoracle10G_INVOKEPROCEDURE(); }}
7.开发JAVA调用函数返回结果集
代码示例：JDBCoracle10G_INVOKEFUNCTION.java
import java.sql.*;import oracle.jdbc.OracleCallableStatement;import oracle.jdbc.OracleTypes;/* /* 本例是通过调用oracle的函数来返回结果集: * oracle 9i、10G 的jdbc由1个jar包组成：classes12.zip */publicclass JDBCoracle10G_INVOKEFUNCTION { Connection conn = null; Statement statement = null; ResultSet rs = null; CallableStatement stmt = null; String driver; String url; String user; String pwd; String sql; String in_price; public JDBCoracle10G_INVOKEFUNCTION() { driver = "oracle.jdbc.driver.OracleDriver"; url = "jdbc:oracle:thin:@localhost:1521:ORCL"; // oracle 用户 user = "test"; // oracle 密码 pwd = "test"; init(); // mysid：必须为要连接机器的sid名称，否则会包以下错： // java.sql.SQLException: Io 异常: Connection // refused(DESCRIPTION=(TMP=)(VSNNUM=169870080)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4)))) // 参考连接方式: // Class.forName( "oracle.jdbc.driver.OracleDriver" ); // cn = DriverManager.getConnection( // "jdbc:oracle:thin:@MyDbComputerNameOrIP:1521:ORCL", sUsr, sPwd ); } publicvoid init() { System.out.println("oracle jdbc test"); try { Class.forName(driver); System.out.println("driver is ok"); conn = DriverManager.getConnection(url, user, pwd); System.out.println("conection is ok"); statement = conn.createStatement(); // conn.setAutoCommit(false); // 输入参数 in_price = "5.0"; // 调用函数 stmt = conn.prepareCall("{? = call F_GET_PRICE(?)}"); // stmt.registerOutParameter(1, java.sql.Types.FLOAT); // stmt.registerOutParameter(2, java.sql.Types.CHAR); stmt.registerOutParameter(1, oracle.jdbc.OracleTypes.CURSOR); stmt.setString(2, in_price); stmt.executeUpdate(); // 取的结果集的方式一： rs = ((OracleCallableStatement) stmt).getCursor(1); // 取的结果集的方式二： // rs = (ResultSet) stmt.getObject(1); String ric; String price; String updated; while (rs.next()) { ric = rs.getString(1); price = rs.getString(2); updated = rs.getString(3); System.out.println("ric:" + ric + ";-- price:" + price + "; --" + updated + "; "); } } catch (Exception e) { e.printStackTrace(); } finally { System.out.println("close "); } } publicstaticvoid main(String args[])// 自己替换［］ { new JDBCoracle10G_INVOKEFUNCTION(); }}