<b>Java通过JDBC访谒Oracle的2个非常</b>[Java编程]

1. 衔接非常慢, 衔接成功后履行select操作呈现非常:

Exception in thread "main" java.sql.SQLException: ORA-00600: 内部错误代码,参数: [ttcgcshnd-1], [0], [], [], [], [], [], []

办理: 利用oracle安装目录下的jdbclibclasses12.jar后正常.

2. 利用PreparedStatement的setString(i, s)时呈现:

可以参考帖子:http://community.csdn.net/Expert/topic/3936/3936672.xml?temp=.2879145

java.sql.SQLException: 数据大小超越此范例的最大值: 3000

背面那个值大小不定, 感受与s大小有关

表构造

create table test(

name char(32),

addr varchar(3000) //varchar2也一样

)

办理办法: 采取setCharacterStream

-------------------------------------------------------

import java.sql.*;

import java.io.*;
import java.util.*;
/**
* oracle测试
* @author kingfish
* @version 1.0
*/
public class TestOra {
public static void testORACLE() {
String url = "jdbc:oracle:thin:@localhost:1521:oradb";
String username = "system";
String password = "manager";
Connection conn = null;
try {
Class.forName( "oracle.jdbc.driver.OracleDriver");
conn = DriverManager.getConnection(url, username, password);
}
catch (Exception e) {
e.printStackTrace();
return;
}
char[] carray = new char[1000];
Arrays.fill(carray, ´我´);
String s = new String(carray);
try {
PreparedStatement pst = conn.prepareStatement(
"insert into test(name,addr) values(?,?)");
pst.setString(1, "kingfish");
pst.setCharacterStream(2,
new InputStreamReader(new ByteArrayInputStream(s.
getBytes())), s.length());
//pst.setString(2,s); //用此句则非常
pst.execute();
Statement st = conn.createStatement();
ResultSet r = st.executeQuery("SELECT * from test");
while (r.next()) {
s = r.getString(2);
System.out.println( "len=" + s.length());
System.out.println( "value=" + s);
}
r.close();
st.close();
conn.close();
}
catch (Exception e) {
e.printStackTrace();
}
}
/**
*测试
* @param args String[]
*/
public static void main(String[] args) {
testORACLE();
}
}