Oracle 在JDBC中使用 存储过程,包

 

前提:

　　　　在Oracle中已经定义  存储过程  和  存储函数 和  包

　　　　导入了Oracle的JDBC   jar  包

 package demo;

 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:@192.168.56.101:1521:orcl";
     private static String user = "scott";
     private static String password = "tiger";

     static{
         try {
             Class.forName(driver);
         } catch (ClassNotFoundException e) {
             throw new ExceptionInInitializerError(e);
         }
         //DriverManager.registerDriver(driver)
     }

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

     /*
      * 运行Java程序
      * java -Xms100M -Xmx200M HelloWorld
      *
      * 技术方向:
      * 1. 性能调优  ---> tomcat
      * 2. 故障诊断  ---> 死锁
      */
     public static void release(Connection conn,Statement st,ResultSet rs){
         if(rs != null){
             try {
                 rs.close();
             } catch (SQLException e) {
                 e.printStackTrace();
             }finally{
                 rs = null;// ----> java GC
             }
         }
         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;
             }
         }
     }
 }

Jdbc工具类

 package demo;

 import java.sql.CallableStatement;
 import java.sql.Connection;
 import java.sql.ResultSet;

 import oracle.jdbc.OracleCallableStatement;
 import oracle.jdbc.OracleTypes;

 import org.junit.Test;

 public class TestOracle {
 /*
  * create or replace procedure queryempinfo(eno in number,
                                             pename out varchar2,
                                             psal   out number,
                                             pjob   out varchar2)
  */
     @Test
     public void testProcedure(){
         //{call <procedure-name>[(<arg1>,<arg2>, ...)]}
         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+"\t"+sal+"\t"+job);
         } catch (Exception e) {
             e.printStackTrace();
         }finally{
             JDBCUtils.release(conn, call, null);
         }
     }

 /*
  * create or replace function queryempincome(eno in number)
 return number
  */
     @Test
     public void testFunction(){
         //{?= call <procedure-name>[(<arg1>,<arg2>, ...)]}
         String sql = "{?=call queryempincome(?)}";

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

             //第一个是out参数
             call.registerOutParameter(1, OracleTypes.NUMBER);
             //第二个是in参数
             call.setInt(2, 7839);

             call.execute();

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

     @Test
     public void testCursor(){
         String sql = "{call MYPAKCAGE.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);

             call.execute();

             //取出结果
             rs = ((OracleCallableStatement)call).getCursor(2);
             while(rs.next()){
                 //取出一个员工
                 String name = rs.getString("ename");
                 double sal = rs.getDouble("sal");
                 System.out.println(name+"\t"+sal);
             }
         } catch (Exception e) {
             e.printStackTrace();
         }finally{
             JDBCUtils.release(conn, call, rs);
         }
     }
 }

测试类