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java控制數(shù)據(jù)庫代碼 java控制數(shù)據(jù)庫代碼大全

java連接數(shù)據(jù)庫的代碼

用這個類吧.好的話,給我加加分.

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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();

}

}

如何通過Java代碼操作數(shù)據(jù)庫

//此類為連接數(shù)據(jù)庫并進行數(shù)據(jù)庫的操作

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

public class Conn {

private static Connection conn = null;

private static Statement st = null;

private static ResultSet rs = null;

//建立數(shù)據(jù)庫的連接

求:用Java連接數(shù)據(jù)庫和簡單的數(shù)據(jù)庫操作代碼

以上的代碼都不如哥的 且看哥是怎么寫條理清晰的代碼的!!!

package dbconnection //java 中不存在沒有包的類(講解詳細(xì)因為項目需要)

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

import java.sql.Statement;//引入sql數(shù)據(jù)庫包

public class DBConnection{

private Connection conn=null;

private Statement stmt=null;

private Result rs=null;

private String jdbc="com.microsoft.sqlserver.jdbc.SQLServerDriver";

private String driverManager="jdbc:sqlserver://localhost:1433;databasename=HcitPos";

private String user="admin";

private int password="admin";

public DBConnection{

try{

Class.forName("jdbc");

conn.getConnection("driverManager");

}

catch(Exception e){}

}

public selectMethod(String sql){

stmt=conn.createStatement();

rs=stmt.extcuteQuery("sql");

while(rs.next()){

String title=rs.getString("title");//利用javaBean獲得數(shù)據(jù)庫中的屬性

String name=rs.getString("name");

.......

System.out.println("title");

System.out.println("name");

......

//當(dāng)然數(shù)據(jù)庫的操作有很多 這里簡單介紹下功能的實現(xiàn)

}

}

public void closeDB(){

if(rs != null) rs.close();

if(stmt != null) stmt.close();

if(conn != null) conn.close();

}

}

JAVA連接數(shù)據(jù)庫連接代碼怎么寫?

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!

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