JDBC課的時(shí)候，聽到一節(jié)是講在利用JDBC中處理批量更新oracle數(shù)據(jù)時(shí)候的特性，讓我很為JDBC的特性感的興奮，利用這個(gè)特性可以在批量更新數(shù)據(jù)的時(shí)候不同往常一樣每次都需要傳送完成的SQL語(yǔ)句到數(shù)據(jù)庫(kù)中。其中示范代碼如下:
1 import java.sql.*;
2
3 public class BatchUpdates
4 {
5 public static void main(String[] args)
6 {
7 Connection conn = null;
8 Statement stmt = null;
9 PreparedStatement pstmt = null;
10 ResultSet rset = null;
11 int i = 0;
12
13 try
14 {
15 DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
16
17 String url = "jdbc:oracle:oci8:@";
18 try {
19 //檢查是否配置JDBC環(huán)境變量
20 String url1 = System.getProperty("JDBC_URL");
21 if (url1 != null)
22 url = url1;
23 } catch (Exception e) {
24 //如果是在集成開發(fā)環(huán)境導(dǎo)入了JDBC的話可以注釋這句
25 }
26
27 // 連接到數(shù)據(jù)庫(kù)用 scott
28 conn = DriverManager.getConnection (url, "scott", "tiger");
29
30 stmt = conn.createStatement();
31 try { stmt.execute(
32 "create table mytest_table (col1 number, col2 varchar2(20))");
33 } catch (Exception e1) {}
34
35 //
36 // 批量插入新值.
37 //
38 pstmt = conn.prepareStatement("insert into mytest_table values (?, ?)");
39
40 pstmt.setInt(1, 1);
41 pstmt.setString(2, "row 1");
42 pstmt.addBatch();
43
44 pstmt.setInt(1, 2);
45 pstmt.setString(2, "row 2");
46 pstmt.addBatch();
47
48 pstmt.executeBatch();
49
50 //
51 // 查詢 輸出結(jié)構(gòu)集
52 //
53 rset = stmt.executeQuery("select * from mytest_table");
54 while (rset.next())
55 {
56 System.out.println(rset.getInt(1) + ", " + rset.getString(2));
57 }
58 }
59 catch (Exception e)
60 {
61 e.printStackTrace();
62 }
63 finally
64 {
65 if (stmt != null)
66 {
67 try { stmt.execute("drop table mytest_table"); } catch (Exception e) {}
68 try { stmt.close(); } catch (Exception e) {}
69 }
70 if (pstmt != null)
71 {
72 try { pstmt.close(); } catch (Exception e) {}
73 }
74 if (conn != null)
75 {
76 try { conn.close(); } catch (Exception e) {}
77 }
78 }
79 }
80 }
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