關(guān)于在Applet中應(yīng)用JDBC訪問數(shù)據(jù)庫的問題?

傲者芭蕾

關(guān)于在Applet中應(yīng)用JDBC訪問數(shù)據(jù)庫的問題?

在jb環(huán)境下能夠?qū)С鯽ccess中的數(shù)據(jù),但嵌入網(wǎng)頁中怎么不見access中的數(shù)據(jù)呢?

程序如下:

import java.awt.*;



import java.applet.*;



import java .sql.*;



public class Applet1 extends Applet



{ public void init() { resize(800,600); }



public void paint(Graphics g) //此方法用于顯示輸出



{

this.setBackground(Color.lightGray ); //定義背景顏色

this.setForeground(Color.red); //定義前景顏色



String url="jdbcdbck";

String ls_1="select * from test";

try //異常處理模塊

{ Class.forName("Sun.jdbc.odbc.JdbcOdbcDriver"; //加載驅(qū)動(dòng)程序



Connection con=DriverManager.getConnection(url,"","";//建立連接



Statement stmt=con.createStatement();//執(zhí)行SQL



ResultSet result=stmt.executeQuery(ls_1); //返回結(jié)果



g.drawString("編號(hào)",40,40);

g.drawString("姓名",80,40);

g.drawString("其他",160,40);

int i=10; while(result.next()) { //取各個(gè)字段的值

g.drawString(result.getString(1),40,60+i);

g.drawString(result.getString(2),80,60+i);

g.drawString(result.getString(3),160,60+i);

i+=20; } //關(guān)閉連接

result.close();

stmt.close();

con.close(); } //捕獲異常

catch(SQLException ex){}

catch(java.lang.Exception ex){}



}



}

elgs

我也不知道該如何用applet連數(shù)據(jù)庫， 我是用jsp連接， 然后將數(shù)據(jù)逐條傳入applet

傲者芭蕾

up!!

傲者芭蕾

up

cinc

出于安全的考慮， 普通 applet 只能訪問下載的臺(tái)機(jī)器，不能訪問本地計(jì)算機(jī)

there are security restrictions for applets that won't allow you
to connect to any machine besides the one that the applet loaded off of
but I thought there might be some kind of exception for database connections.

http://www.experts-exchange.com/Programming/Programming_Languages/Java/Q_20064067.html

傲者芭蕾

up.

zhangv

applet好像不可以連接數(shù)據(jù)庫吧~~

elgs

chinabs 里有文章演示是可以的， 并且我用沒有裝jre的電腦也可以看到chinabs的applet， 可是我無論如何都不行？？

傲者芭蕾

最近又發(fā)現(xiàn)是一個(gè)策略文件在做怪...(三個(gè)星期了....)java.policy就是這個(gè)東東在做怪.不知誰會(huì)配置....3q!!!

joint

覺得還是applet->;servlet->;jdbc->;database比較好