使用java連接MySQL數(shù)據(jù)庫與其他的數(shù)據(jù)庫連接核心是一樣的,如果說區(qū)別,那就是所需的驅(qū)動不一樣。
公司主營業(yè)務(wù):成都網(wǎng)站建設(shè)、做網(wǎng)站、移動網(wǎng)站開發(fā)等業(yè)務(wù)。幫助企業(yè)客戶真正實(shí)現(xiàn)互聯(lián)網(wǎng)宣傳,提高企業(yè)的競爭能力。創(chuàng)新互聯(lián)是一支青春激揚(yáng)、勤奮敬業(yè)、活力青春激揚(yáng)、勤奮敬業(yè)、活力澎湃、和諧高效的團(tuán)隊(duì)。公司秉承以“開放、自由、嚴(yán)謹(jǐn)、自律”為核心的企業(yè)文化,感謝他們對我們的高要求,感謝他們從不同領(lǐng)域給我們帶來的挑戰(zhàn),讓我們激情的團(tuán)隊(duì)有機(jī)會用頭腦與智慧不斷的給客戶帶來驚喜。創(chuàng)新互聯(lián)推出青銅峽免費(fèi)做網(wǎng)站回饋大家。
工具/原料
MySQL、JDK
方法/步驟
1、首先需要安裝好JDK(配置環(huán)境變量),如圖所示:
2、其次要安裝好MySQL數(shù)據(jù)庫,可以使用可視化Navicar For MySQL,如圖所示:
3、最后通過代碼進(jìn)行連接。
(1)確定連接路徑URL:
String url="jdbc:mysql://localhost(可以是本機(jī)IP地址):3306(端口號)/mysqltest(數(shù)據(jù)庫名稱)?"+"user=用戶賬號password=用戶密碼useUnicode=字符編碼";
(2)加載驅(qū)動:
Class.forName("com.mysql.jdbc.Driver");
(3)連接,獲取Connection對象
Connection conn=DriverManager.getConnection(url)
(4)可以通過conn對象檢驗(yàn)連接與否。
1 將數(shù)據(jù)庫的JDBC驅(qū)動加載到classpath中,在基于JAVAEE的WEB應(yīng)用實(shí)際開發(fā)過程中,通常要把目標(biāo)數(shù)據(jù)庫產(chǎn)品的JDBC驅(qū)動復(fù)制到WEB-INF/lib下.
2 加載JDBC驅(qū)動,并將其注冊到DriverManager中,下面是一些主流數(shù)據(jù)庫的JDBC驅(qū)動加裁注冊的代碼:
//Oracle8/8i/9iO數(shù)據(jù)庫(thin模式)
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
//Sql Server7.0/2000數(shù)據(jù)庫
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
//DB2數(shù)據(jù)庫
Class.froName("com.ibm.db2.jdbc.app.DB2Driver").newInstance();
//Informix數(shù)據(jù)庫
Class.forName("com.informix.jdbc.IfxDriver").newInstance();
//Sybase數(shù)據(jù)庫
Class.forName("com.sybase.jdbc.SybDriver").newInstance();
//MySQL數(shù)據(jù)庫
Class.forName("com.mysql.jdbc.Driver").newInstance();
//PostgreSQL數(shù)據(jù)庫
Class.forNaem("org.postgresql.Driver").newInstance();
3 建立數(shù)據(jù)庫連接,取得Connection對象.例如:
//Oracle8/8i/9i數(shù)據(jù)庫(thin模式)
String url="jdbc:oracle:thin:@localhost:1521:orcl";
String user="scott";
String password="tiger";
Connection conn=DriverManager.getConnection(url,user,password);
--完整的太多了!我已經(jīng)把完整的代碼發(fā)到你QQ郵箱了!
import java.sql.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class inensshow extends JFrame {
private Connection connection;
private Statement statement;
private ResultSet resultSet;
private ResultSetMetaData rsMetaData;
//GUI變量定義
private JTable table;
private JTextArea inputQuery;
private JButton submitQuery;
public inensshow()
{
//Form的標(biāo)題
super( "輸入SQL語句,按查詢按鈕查看結(jié)果。" );
String url = "jdbc:mysql://localhost:3306/web";
String username = "inens";
String password = "inens";
//加載驅(qū)動程序以連接數(shù)據(jù)庫
try {
Class.forName( "org.gjt.mm.mysql.Driver" );
connection = DriverManager.getConnection(
url, username, password );
}
//捕獲加載驅(qū)動程序異常
catch ( ClassNotFoundException cnfex ) {
System.err.println(
"裝載 JDBC/ODBC 驅(qū)動程序失敗。" );
cnfex.printStackTrace();
System.exit( 1 ); // terminate program
}
//捕獲連接數(shù)據(jù)庫異常
catch ( SQLException sqlex ) {
System.err.println( "無法連接數(shù)據(jù)庫" );
sqlex.printStackTrace();
System.exit( 1 ); // terminate program
}
//如果數(shù)據(jù)庫連接成功,則建立GUI
//SQL語句
String test="SELECT * FROM data";
inputQuery = new JTextArea( test, 4, 30 );
submitQuery = new JButton( "查詢" );
//Button事件
submitQuery.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent e )
{
getTable();
}
}
);
JPanel topPanel = new JPanel();
topPanel.setLayout( new BorderLayout() );
//將"輸入查詢"編輯框布置到 "CENTER"
topPanel.add( new JScrollPane( inputQuery), BorderLayout.CENTER );
//將"提交查詢"按鈕布置到 "SOUTH"
topPanel.add( submitQuery, BorderLayout.SOUTH );
table = new JTable();
Container c = getContentPane();
c.setLayout( new BorderLayout() );
//將"topPanel"編輯框布置到 "NORTH"
c.add( topPanel, BorderLayout.NORTH );
//將"table"編輯框布置到 "CENTER"
c.add( table, BorderLayout.CENTER );
getTable();
setSize( 500, 300 );
//顯示Form
show();
}
private void getTable()
{
try {
//執(zhí)行SQL語句
String query = inputQuery.getText();
statement = connection.createStatement();
resultSet = statement.executeQuery( query );
//在表格中顯示查詢結(jié)果
displayResultSet( resultSet );
}
catch ( SQLException sqlex ) {
sqlex.printStackTrace();
}
}
private void displayResultSet( ResultSet rs )
throws SQLException
{
//定位到達(dá)第一條記錄
boolean moreRecords = rs.next();
//如果沒有記錄,則提示一條消息
if ( ! moreRecords ) {
JOptionPane.showMessageDialog( this,
"結(jié)果集中無記錄" );
setTitle( "無記錄顯示" );
return;
}
Vector columnHeads = new Vector();
Vector rows = new Vector();
try {
//獲取字段的名稱
ResultSetMetaData rsmd = rs.getMetaData();
for ( int i = 1; i = rsmd.getColumnCount(); ++i )
columnHeads.addElement( rsmd.getColumnName( i ) );
//獲取記錄集
do {
rows.addElement( getNextRow( rs, rsmd ) );
} while ( rs.next() );
//在表格中顯示查詢結(jié)果
table = new JTable( rows, columnHeads );
JScrollPane scroller = new JScrollPane( table );
Container c = getContentPane();
c.remove(1);
c.add( scroller, BorderLayout.CENTER );
//刷新Table
c.validate();
}
catch ( SQLException sqlex ) {
sqlex.printStackTrace();
}
}
private Vector getNextRow( ResultSet rs,
ResultSetMetaData rsmd )
throws SQLException
{
Vector currentRow = new Vector();
for ( int i = 1; i = rsmd.getColumnCount(); ++i )
currentRow.addElement( rs.getString( i ) );
//返回一條記錄
return currentRow;
}
public void shutDown()
{
try {
//斷開數(shù)據(jù)庫連接
connection.close();
}
catch ( SQLException sqlex ) {
System.err.println( "Unable to disconnect" );
sqlex.printStackTrace();
}
}
public static void main( String args[] )
{
final inensshow app =
new inensshow();
app.addWindowListener(
new WindowAdapter() {
public void windowClosing( WindowEvent e )
{
app.shutDown();
System.exit( 0 );
}
}
);
}
}
------------------------------------------------------------
這次在WIN98中就不好使了。因?yàn)镸ysql的驅(qū)動程序沒有也沒能加入到CLASSPATH 當(dāng)中,但是JSP卻可以使用(JSP的98驅(qū)動加載詳見Jsp與Mysql連接查錯文章),所以這次我是在XPServer中測試的。
代碼主要列出連接數(shù)據(jù)庫的關(guān)鍵代碼,其他訪問數(shù)據(jù)庫代碼省略
1、Oracle8/8i/9i數(shù)據(jù)庫(thin模式)
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
String url="jdbc:oracle:thin:@localhost:1521:orcl";
//orcl為數(shù)據(jù)庫的SID
String user="test";
String password="test";
Connection conn= DriverManager.getConnection(url,user,password);
2、DB2數(shù)據(jù)庫
Class.forName("com.ibm.db2.jdbc.app.DB2Driver ").newInstance();
String url="jdbc:db2://localhost:5000/sample";
//sample為你的數(shù)據(jù)庫名
String user="admin";
String password="";
Connection conn= DriverManager.getConnection(url,user,password);
3、Sql Server7.0/2000數(shù)據(jù)庫
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=mydb";
//mydb為數(shù)據(jù)庫
String user="sa";
String password="";
Connection conn= DriverManager.getConnection(url,user,password);
4、Sybase數(shù)據(jù)庫
Class.forName("com.sybase.jdbc.SybDriver").newInstance();
String url =" jdbc:sybase:Tds:localhost:5007/myDB";
//myDB為你的數(shù)據(jù)庫名
Properties sysProps = System.getProperties();
SysProps.put("user","userid");
SysProps.put("password","user_password");
Connection conn= DriverManager.getConnection(url, SysProps);
5、Informix數(shù)據(jù)庫
Class.forName("com.informix.jdbc.IfxDriver").newInstance();
String url =
"jdbc:informix-sqli://123.45.67.89:1533/myDB:INFORMIXSERVER=myserver;
user=testuser;password=testpassword";
//myDB為數(shù)據(jù)庫名
Connection conn= DriverManager.getConnection(url);
6、MySQL數(shù)據(jù)庫
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
String url ="jdbc:mysql://localhost/myDB?user=softpassword=soft1234useUnicode=truecharacterEncoding=8859_1"
//myDB為數(shù)據(jù)庫名
Connection conn= DriverManager.getConnection(url);
7、PostgreSQL數(shù)據(jù)庫
Class.forName("org.postgresql.Driver").newInstance();
String url ="jdbc:postgresql://localhost/myDB"
//myDB為數(shù)據(jù)庫名
String user="myuser";
String password="mypassword";
Connection conn= DriverManager.getConnection(url,user,password);
private static String url="jdbc:oracle:thin:@localhost:1521:xe";
聲明一個字符串用于存儲數(shù)據(jù)庫連接信息,jdbc:oracle:thin:@localhost:1521表示你要連接的是oracle數(shù)據(jù)庫地址是本機(jī)
xe為本機(jī)數(shù)據(jù)庫庫名。
private static String driverName="oracle.jdbc.driver.OracleDriver";
這一條是聲明一個字符串存儲數(shù)據(jù)庫驅(qū)動
用這個類吧.好的話,給我加加分.
import java.sql.*;
/**
* @功能: 一個JDBC的本地化API連接類,封裝了數(shù)據(jù)操作方法,只用傳一個SQL語句即可
* @作者: 李開歡
* @日期: 2007/
*/
public class ConnectionDemo {
/*
* 這里可以將常量全部放入另一個類中,以方便修改
*/
private static Connection conn;
private static Statement ps;
private static ResultSet rs;
private static final String DRIVER = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
private static final String URL = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=mydb";
private static final String USER ="sa";
private static final String PASS = "sa";
public ConnectionDemo() {
// TODO Auto-generated constructor stub
ConnectionDemo.getConnection();
}
public static Connection getConnection(){
System.out.println("連接中...");
try {
Class.forName(ConnectionDemo.DRIVER);
conn = DriverManager.getConnection(ConnectionDemo.URL, ConnectionDemo.USER, ConnectionDemo.PASS);
System.out.println("成功連接");
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
public static Statement getStatement(String sql){
System.out.println("執(zhí)行SQL語句中...");
try {
ps = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
if(sql.substring(0, 6).equals("select")){
rs = ps.executeQuery(sql);
System.out.println("執(zhí)行完查詢操作,結(jié)果已返回ResultSet集合");
}else if(sql.substring(0, 6).equals("delete")){
ps.executeUpdate(sql);
System.out.println("已執(zhí)行完畢刪除操作");
}else if(sql.substring(0, 6).equals("insert")){
ps.executeUpdate(sql);
System.out.println("已執(zhí)行完畢增加操作");
}else{
ps.executeUpdate(sql);
System.out.println("已執(zhí)行完畢更新操作");
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return ps;
}
public static ResultSet getResultSet(){
System.out.println("查詢結(jié)果為:");
return rs;
}
public static void closeConnection(){
System.out.println("關(guān)閉連接中...");
try {
if (rs != null) {
rs.close();
System.out.println("已關(guān)閉ResultSet");
}
if (ps != null) {
ps.close();
System.out.println("已關(guān)閉Statement");
}
if (conn != null) {
conn.close();
System.out.println("已關(guān)閉Connection");
}
} catch (Exception e) {
// TODO: handle exception
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
ConnectionDemo.getConnection();
String sql = "delete from type where id = 1";
ConnectionDemo.getStatement(sql);
String sql2 = "insert into type values(1,'教學(xué)設(shè)備')";
ConnectionDemo.getStatement(sql2);
String sql1 = "select * from type";
ConnectionDemo.getStatement(sql1);
ResultSet rs = ConnectionDemo.getResultSet();
System.out.println("編號 "+"類 型");
try {
while(rs.next()){
System.out.print(" "+rs.getInt(1)+" ");
System.out.println(rs.getString(2));
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ConnectionDemo.closeConnection();
}
}
分享標(biāo)題:java數(shù)據(jù)庫的連接代碼,Java連接數(shù)據(jù)庫代碼
文章起源:http://chinadenli.net/article34/heshse.html
成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián),為您提供Google、App開發(fā)、全網(wǎng)營銷推廣、外貿(mào)網(wǎng)站建設(shè)、服務(wù)器托管、面包屑導(dǎo)航
聲明:本網(wǎng)站發(fā)布的內(nèi)容(圖片、視頻和文字)以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主,如果涉及侵權(quán)請盡快告知,我們將會在第一時間刪除。文章觀點(diǎn)不代表本網(wǎng)站立場,如需處理請聯(lián)系客服。電話:028-86922220;郵箱:631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載,或轉(zhuǎn)載時需注明來源: 創(chuàng)新互聯(lián)