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    發(fā)布日期: 2021-02-01
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Java 圖片存儲(chǔ)到MySQL數(shù)據(jù)庫(kù)中(提高篇-實(shí)例129).zip

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代碼片段和文件信息

package?com.zzk;

import?java.sql.*;
import?javax.swing.JOptionPane;

public?class?DAO?{
????private?static?DAO?dao?=?new?DAO();?//?聲明DAO類的靜態(tài)實(shí)例
????
????/**
?????*?構(gòu)造方法,加載數(shù)據(jù)庫(kù)驅(qū)動(dòng)
?????*/
????public?DAO()?{
????????try?{
????????????Class.forName(“com.mysql.jdbc.Driver“);?//?加載數(shù)據(jù)庫(kù)驅(qū)動(dòng)
????????}?catch?(ClassNotFoundException?e)?{
????????????JOptionPane.showMessageDialog(null
????????????????????“數(shù)據(jù)庫(kù)驅(qū)動(dòng)加載失敗,請(qǐng)將MySQL驅(qū)動(dòng)配置到構(gòu)建路徑中。\n“?+?e.getMessage());
????????}
????}
????
????/**
?????*?獲得數(shù)據(jù)庫(kù)連接的方法
?????*?
?????*?@return?Connection
?????*/
????public?static?Connection?getConn()?{
????????try?{
????????????Connection?conn?=?null;?//?定義數(shù)據(jù)庫(kù)連接
????????????String?url?=?“jdbc:mysql://localhost:3306/db_database?useUnicode=true&characterEncoding=utf-8“;?//?數(shù)據(jù)庫(kù)db_database的URL
????

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件?????????378??2010-09-04?09:04??.classpath
?????文件?????????379??2010-12-31?14:13??.project
?????文件?????????124??2011-01-30?10:50??程序使用說(shuō)明.txt
?????文件?????????629??2010-09-04?08:55??.settings\org.eclipse.jdt.core.prefs
?????文件????????1664??2011-02-14?10:44??bin\com\zzk\DAO.class
?????文件?????????794??2011-02-14?10:44??bin\com\zzk\SavePictureToMySQLframe$1.class
?????文件????????2431??2011-02-14?10:44??bin\com\zzk\SavePictureToMySQLframe$2.class
?????文件????????2704??2011-02-14?10:44??bin\com\zzk\SavePictureToMySQLframe$3.class
?????文件?????????766??2011-02-14?10:44??bin\com\zzk\SavePictureToMySQLframe$4.class
?????文件????????3214??2011-02-14?10:44??bin\com\zzk\SavePictureToMySQLframe.class
?????文件???????83300??2011-01-04?16:49??database\db_database.sql
?????文件??????802721??2013-11-15?08:43??lib\mysql-connector-java-5.1.20-bin.jar
?????文件????????1265??2010-09-04?09:18??src\com\zzk\DAO.java
?????文件????????6659??2010-10-19?14:39??src\com\zzk\SavePictureToMySQLframe.java

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