Jdbc、Jdo方面 1、可能会让你写一段Jdbc连Oracle的程序,并实现数据查询.
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答:程序如下:
0 Y' `9 ~" m9 ~. x; y! X; p q* W2 I package hello.ant;
; s: { ]4 |4 j3 `+ I6 V9 z import java.sql.*;0 l2 n1 _: j& x8 c" M: s
public class jdbc1 Y5 @: \: E! ^9 P' y
{
; y+ S y7 p6 N$ p, z0 B$ ? String dbUrl="jdbc:oracle:thin:@127.0.0.1:1521:orcl";
1 ]! z4 \' k5 z8 U+ Q. f0 L F String theUser="admin";
3 _' Y% ~# J$ q, C String thePw="manager";
; h& L/ `# I ?9 q/ g, n Connection c=null;6 ~! y1 v6 F# `" ~/ I" ]$ C' V R- O6 G
Statement conn;
$ A! z) n: T/ s$ a$ C ResultSet rs=null;" O* }9 ]5 q- K. z4 ^
public jdbc() 3 X% W! { }- T
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try
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; \6 t+ g- `* Y Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
# k' P7 D1 T. a# U c = DriverManager.getConnection(dbUrl,theUser,thePw);3 O$ y& e# a0 R
conn=c.createStatement();. K5 p1 J+ H: s4 B. C. u
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catch(Exception e)
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+ M, Y# i/ Z$ e e.printStackTrace();
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public boolean executeUpdate(String sql)& I7 O6 i3 V' k" p
{
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conn.executeUpdate(sql);; m& U/ s4 O! X7 Q
return true;
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% E9 W( M9 S! a+ z catch (SQLException e), q% x, D5 `) z
{
3 u5 `) Z& O/ x, U e.printStackTrace();" ^6 E, c7 L# c
return false;
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* q* G7 Z: J0 n) ~2 Z; i( d* o public ResultSet executeQuery(String sql)
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rs=null;
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{
, \* C+ a4 e" |; {" |: v rs=conn.executeQuery(sql);
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* f) b. p1 G6 k. s, U q catch (SQLException e)5 M: R8 Y; G8 ]3 {: H" c
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e.printStackTrace();
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return rs;
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