Java中CallableStatement调用Oracle存储过程总结

一、无返回值的存储过程调用
CREATE OR REPLACE PROCEDURE PRO_1(PARA1 IN VARCHAR2,PARA2 IN VARCHAR2)   AS     
BEGIN     
    INSERT INTO DBO.EMP (ID,NAME) VALUES (PARA1, PARA2);  
END PRO_1;

import java.sql.*;
import java.sql.ResultSet;
public class CallProcedureTest1 {
public CallProcedureTest1() {
   super();
}
public static void main(String[] args) {
   String driver = "oracle.jdbc.driver.OracleDriver";
   String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl ";
   String user = "admin";
   String pwd = "password";
   Connection conn = null;
   CallableStatement cs = null;
   ResultSet rs = null;
   try {
    Class.forName(driver);
    conn = DriverManager.getConnection(url, user, pwd);
    cs = conn.prepareCall("{ call DBO.PRO_1(?,?) }");
    cs.setString(1, "10");
    cs.setString(2, "Peter");
    cs.execute();
   } catch (SQLException e) {
    e.printStackTrace();
   } catch (Exception e) {
    e.printStackTrace();
   } finally {
    try {
     if (rs != null) {
      rs.close();
     }
     if (cs != null) {
      cs.close();
     }
     if (conn != null) {
      conn.close();
     }
    } catch (SQLException e) {
    }
   }
}
}


二、有返回值的存储过程(非结果集) 
CREATE OR REPLACE PROCEDURE PRO_2(PARA1 IN VARCHAR2,PARA2 OUT VARCHAR2)   AS  
BEGIN   
    SELECT name INTO PARA2 FROM EMP WHERE ID= PARA1;   
END PRO_2;  

import java.sql.*;
public class CallProcedureTest2 {
public CallProcedureTest2() {
   super();
}
public static void main(String[] args) {
   String driver = "oracle.jdbc.driver.OracleDriver";
   String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
   String user = "admin";
   String pwd = "password";
   Connection conn = null;
   CallableStatement cs = null;
   ResultSet rs = null;
   try {
    Class.forName(driver);
    conn = DriverManager.getConnection(url, user, pwd);
    cs = conn.prepareCall("{ call DBO.PRO_2(?,?) }");
    cs.setString(1, "10");
    cs.registerOutParameter(2, Types.VARCHAR);
    cs.execute();
    String name = cs.getString(2);
    System.out.println("name: " + name);
   } catch (SQLException e) {
    e.printStackTrace();
   } catch (Exception e) {
    e.printStackTrace();
   } finally {
    try {
     if (rs != null) {
      rs.close();
     }
     if (cs != null) {
      cs.close();
     }
     if (conn != null) {
      conn.close();
     }
    } catch (SQLException e) {
    }
   }
}
}
cs.getString(2)中的数值2并非任意的,而是和存储过程中的out列对应的,如果out是在第一个位置,那就是proc.getString(1),如果是第三个位置,就是proc.getString(3),

当然也可以同时有多个返回值,那就是再多加几个out参数了。


三、返回列表    
由于oracle存储过程没有返回值,它的所有返回值都是通过out参数来替代的,列表同样也不例外,但由于是集合,所以不能用一般的参数,必须要用pagkage了.所以要分两部分,

 
1 建一个程序包
CREATE OR REPLACE PACKAGE MYPACKAGE AS  
TYPE MY_CURSOR IS REF CURSOR;  
end MYPACKAGE;

2 建立存储过程  
CREATE OR REPLACE PROCEDURE PRO_3(p_CURSOR out MYPACKAGE.MY_CURSOR) IS  
BEGIN    
     OPEN p_CURSOR FOR SELECT * FROM DBO.EMP;  
END PRO_3;  
把游标(可以理解为一个指针)作为一个out参数来返回值的。  


import java.sql.*;
import java.sql.ResultSet;
public class CallProcedureTest2 {
public CallProcedureTest2() {
   super();
}
public static void main(String[] args) {
   String driver = "oracle.jdbc.driver.OracleDriver";
   String url = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
   String user = "admin";
   String pwd = "password";
   Connection conn = null;
   CallableStatement cs = null;
   ResultSet rs = null;
   try {
    Class.forName(driver);
    conn = DriverManager.getConnection(url, user, pwd);
    cs = conn.prepareCall("{ call DBO.PRO_3(?) }");
    cs.registerOutParameter(1, oracle.jdbc.OracleTypes.CURSOR);
    cs.execute();
    rs = (ResultSet) cs.getObject(1);
    while (rs.next()) {
     System.out.println("\t" + rs.getString(1) + "\t"
       + rs.getString(2) + "\t");
    }
   } catch (SQLException e) {
    e.printStackTrace();
   } catch (Exception e) {
    e.printStackTrace();
   } finally {
    try {
     if (rs != null) {
      rs.close();
      if (cs != null) {
       cs.close();
      }
      if (conn != null) {
       conn.close();
      }
     }
    } catch (SQLException e) {
    }
   }
}
}
在执行前一定要先把oracle的驱动包放到class路径里,否则会报错。


四、综合的例子

// CallableStatement 1 - 调用一个含有out参数的procedure
CallableStatement cs=conn.prepareCall("{call mytestprc10(?,?,?)}");
cs.setString(1,"10");
cs.setString(2,"20");
cs.registerOutParameter(3,Types.INTEGER); // 注意此处对返回参数的设置方法    
cs.executeUpdate();
int t=cs.getInt(3);
System.out.println("CallableStatement 1 :"+t);
cs.close();

// CallableStatement 2 - 调用一个返回数值型参数的函数
CallableStatement cs2=conn.prepareCall("{ ? = call mytestpkg1.myf_mult(?,?)}");
cs2.registerOutParameter(1,Types.INTEGER);// 注意此处对返回参数的设置方法
cs2.setInt(2,2);
cs2.setInt(3,3);
cs2.executeUpdate();
int t2=cs2.getInt(1);
System.out.println("CallableStatement 2 : " + t2);
cs2.close();
    
//CallableStatement 3 - 调用一个返回Cursor类型参数的函数
CallableStatement cs3=conn.prepareCall("{?=call mytestpkg1.myf_rtnrcd(?)}");
cs3.registerOutParameter(1, OracleTypes.CURSOR); // 注意此处对返回参数的设置方法,和上面的有所不同
cs3.setInt(2,20);
cs3.executeUpdate();
ResultSet rs3=(ResultSet)cs3.getObject(1);
rs3.next();
System.out.println("CallableStatement 3 : " + rs3.getString(2));
rs3.close();
cs3.close();

 

原帖地址:http://wenku.baidu.com/view/34d4be13227916888486d71d.html

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