java-oracle 调用程序包

时间：2010-08-22 来源：kelin1314

java代码如下：

1 import java.sql.CallableStatement;
2 import java.sql.Connection;
3 import java.sql.DriverManager;
4 import java.sql.SQLException;
5
6 import oracle.jdbc.OracleDriver;
7
8 public class Test {
9
10     /**
11      * @param args
12      */
13     public static void main(String[] args) {
14         Connection conn = null;
15         CallableStatement callstmt = null;
16         //String sql="{? = call MyPack.getAvgHisal()}";
17         String sql="{? = call MyPack.getHisalAccordingGrade(?)}";
18         try {
19             conn = getConnection();
20             if (conn != null) {
21                 callstmt = conn.prepareCall(sql);
22                 //the first parameter
23                 callstmt.registerOutParameter(1, java.sql.Types.DECIMAL);
24                 //the second parameter
25                 callstmt.setString(2, "1");
26                 callstmt.execute();
27                 System.out.println(callstmt.getInt(1));
28             }
29         } catch (Exception e) {
30             e.printStackTrace();
31         }
32     }
33
34     static Connection getConnection() throws SQLException {
35         DriverManager.registerDriver(new OracleDriver());
36         String cs = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
37         return DriverManager.getConnection(cs, "scott", "tiger");
38     }
39 }
40

Oracle程序包如下：

1 --package
2 create or replace package MyPack
3 as
4 function getHisalAccordingGrade(inGrade in salgrade.hisal%type)
5 return salgrade.hisal%type;
6 procedure getAvgHisal
7 (v_average out number);
8 end;
9
10 --package body
11 create or replace package body MyPack
12 AS
13 procedure getAvgHisal
14 (v_average out number)
15 as
16 begin
17 select AVG(hisal) into v_average
18 from salgrade;
19 end getAvgHisal;
20
21 function getHisalAccordingGrade(inGrade in salgrade.hisal%type)
22  return salgrade.hisal%type
23  as
24  outHisal salgrade.hisal%type;
25  begin
26    select hisal into outHisal
27    from salgrade where grade = inGrade;
28    return outHisal;
29  end getHisalAccordingGrade;
30  end MyPack;

问题：

1. oracle集函数AVG()的返回值类型总是不匹配

2. 当sql文件中有多条sql语句的时候，可以拆成一句句的sql批量执行；当sql里面定义的是有具体定义的procedure,function或者package的时候也可以用call来调用；但是是不是所有的sql文件都可以执行，这个需要测试。。

Java-Oracle类型转换：

Oracle与java.sql.Types的对应

Oracle                                java.sql.Types
blob                                     blob
char                                     char
clob                                     clob
date                                    date
number                               decimal
long                                     varbinary
nclob,nvarchar2                   other
smallint                                smallint
timestamp                            timstamp
raw                                      varbinary
varchar2                               varchar

Sql server与java.sql.Types的对应

Sql server                           java.sql.Types
   bigint (2005,2008)                bigint
   timstamp,binary                    binary
   bit                                         bit
   char,nchar,unqualified          char
   datetime                             date
   money,smallmoney,decimal decimal
   float (2005,2008)                  double
   float(2000)                            float
   int                                          integer
   image                                    longvarbinary
   text,ntext,xml                        longvarchar

    numeric                                 numeric
    real                                       real
    smallint                                smallint
    datetime,smalldatetime       timestamp
    tinyint                              tinyint
    varbinary                             varbinay
    nvarchar,varchar                 varchar

DB2与java.sql.Types的对应

bigint                                       bigint
   blob                                      blob
   character,graphic                 char
   clob                                clob
   date                             date
   decimal                        decimal
   double                         double
    integer                       integer
    longvargraphic               longvarchar
    longvarchar

real                                        real
smallint                                 smallint
time                                      time
timestamp        timestamp
vargraphic                            varchar
varchar

MySQL与java.sql.Types的对应

MySQL                          java.sql.Types
bigint                              bigint
   tinyblob                         binary
   bit                                  bit
   enum,set,char               char
   date,year                      date
   decimal,numeric            decimal
   double,real                   double
   mediumint,int                integer
   blob,mediumblob           blob
   longblob
   float                               real

smallint                           smallint
   time                             time
   timestamp,datetime     timestamp
   tinyint                           tinyint
   varbinary,binary           varbinay
   varchar,tinytext,text     varchar
Sybase与java.sql.Types的对应

Sybase                            java.sql.Types
   binary                                 binary
   bit                                       bit
   char,nchar,                            char
   money,smallmoney,decimal    decimal
   float                                     double
    int                                       integer
   image                                    longvarbinary
   text                                      longvarchar
numeric                                   numeric
    real                                     real
    smallint                              smallint
    datetime,smalldatetime     timestamp
    tinyint                                 tinyint
    varbinar,timestamp            varbinay
    nvarchar,varchar ,sysname   varchar