??:

eclipse, MySQL, MySQL ?? ????: mysql-connector-java-5.1.45.jar

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1 ? Java ????? ?? ?? ? ??? ???? - libs(??? ?? ???? ???? ? ??)

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2. mysql-connector-java-5.1.45-bin.jar? mysql ??????

? ???? ???? ?????. Java ????? libs ?? ??(?? ?? ??? ??)? ???? ??????. eclipse?? libs ??? ??? ??? ???? ???? ?? ???? ????? JDBC? ??? ????. ?? ??? ????. # ????#

3. ?? ??? Jar ???

#???? #a. ????? ?????. —— ??? ?????. ??

b

??? ? ? Java? ?????. ?? ??, jar ??(JAR ??...)? ???? ?????? jar ???? ??? ?? ???? ????? ???? ?????.

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4. Java ?????? mysql ??????? ?????

Java ???? ???? ? ?? ??? ??? ??? ??? ?????. ??? DBHelper ? Demo

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A ???? ??????? ??? ?? ? ?????: DBHelper.java

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package sqldemo1;
import java.sql.Connection;  
import java.sql.DriverManager;  
import java.sql.PreparedStatement;  
import java.sql.SQLException;

public class DBHelper {
    public static final String url = "jdbc:mysql://127.0.0.1/student";  
    public static final String name = "com.mysql.jdbc.Driver";  
    public static final String user = "root";  
    public static final String password = "";  
 
    public Connection conn = null;  
    public PreparedStatement pst = null;  
 
    public DBHelper(String sql) {  
        try {  
            Class.forName(name);//指定連接類型  
            conn = DriverManager.getConnection(url,user,password);//獲取連接  
            pst = conn.prepareStatement(sql);//準(zhǔn)備執(zhí)行語句  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
 
    public void close() {  
        try {  
            this.conn.close();  
            this.pst.close();  
        } catch (SQLException e) {  
            e.printStackTrace();  
        }  
    }
}

#?? ??#?? Demo.java ?? ?? ?? ?? ??

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 package sqldemo1;

import java.sql.ResultSet;  
import java.sql.SQLException;

public class Demo {  
    
    static String sql = null;  
    static DBHelper db1 = null;  
    static ResultSet ret = null;  
    
    public static void main(String[] args) {  
        sql = "select *from stuinfo";//SQL語句  
        db1 = new DBHelper(sql);//創(chuàng)建DBHelper對象
        
        try {  
            ret = db1.pst.executeQuery();//執(zhí)行語句，得到結(jié)果集  
            while (ret.next()) {  
                String uid = ret.getString(1);  
                String ufname = ret.getString(2);  
                String ulname = ret.getString(3);  
                String udate = ret.getString(4);  
                System.out.println(uid + "\t" + ufname + "\t" + ulname + "\t" + udate );  
            }//顯示數(shù)據(jù)  
            ret.close();  
            db1.close();//關(guān)閉連接  
        } catch (SQLException e) {  
            e.printStackTrace();  
        }  
    }
    
}

5. ??????

a. ?????? ???? ?? ??? ??

b. jar ???? ?????? ??

e.

?? ????: JavaTutorial

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