database.java~15~

来自「该文件中包含有源代码及一部分的文档,该系统是一个小型的英语单词字典的系统.」· JAVA~15~ 代码 · 共 54 行

package logindemo;

import java.sql.Connection;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.DriverManager;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 */
public class Database {
    private Connection con;
    private Statement st;

    public Database() {
        try {
            Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
            String url =
                    "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=Bookshop";
            String user = "";
            String password = "";
            con = DriverManager.getConnection(url, user, password);
            st = con.createStatement();
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
            System.out.println("数据库连接失败");
        }
    }

    public ResultSet query(String sql){
    try {
        return st.executeQuery(sql);
    } catch (SQLException ex) {
        ex.printStackTrace();
        return null;
    }
    }

    public boolean update(String sql){
    try {
        return st.executeUpdate(sql) != 0;
    } catch (SQLException ex) {
        ex.printStackTrace();
        return false;
    }
    }
}