dbtools.java

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/*
 * DBTools.java
 *
 * Created on 2008年1月10日, 上午8:07
 *
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package ArticleSharing;

import java.io.UnsupportedEncodingException;
import java.sql.*;

public class DBTools {
    private Connection con = null;  // 数据库连接
    private Statement stmt = null;  // 数据库命令
    
    /** Creates a new instance of DBTools */
    public DBTools() {	// 这里设置成private貌似就没有办法使用javaBean技术了……
        try {
            Class.forName("com.mysql.jdbc.Driver");
            con = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/dating_platform", "root", "1234");
            stmt = con.createStatement();
        }
        catch(Exception e) {
            e.printStackTrace();
        }
    }
    
    public ResultSet excuteQuery(String sql) {
        try {
            ResultSet rs = stmt.executeQuery(sql);
            return rs;
        }
        catch(Exception e) {
            return null;
        }
    }
    
    public int excuteUpdate(String sql) {
        try {
            return stmt.executeUpdate(sql);
        }
        catch(Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
    
    public static String changeCharset(String s, String from, String to) throws UnsupportedEncodingException {
        byte[] b = s.getBytes(from);
        return new String(b, to);
    }
}