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  • JAVA使用JDBC连接MySQL数据库

    第一个类:

    package dina.web.test;

    import java.sql.*;

    public class DBHelper {
    public static final String DRIVER = "com.mysql.jdbc.Driver";
    public static final String URL = "jdbc:mysql://58.215.50.62:3307/iov";
    public static final String USER = "iov_user";
    public static final String PASSWORD = "2wsx3edc";

    public Connection conn = null;
    public PreparedStatement pst = null;

    public DBHelper(String sql) {
    try {
    Class.forName(DRIVER);
    conn = DriverManager.getConnection(URL, USER, PASSWORD);
    pst = conn.prepareStatement(sql);
    } catch (Exception e) {
    e.printStackTrace();
    }
    }

    public void close() {
    try {
    if (pst != null) {
    this.pst.close();
    }

    } catch (Exception e) {
    e.printStackTrace();
    }
    try {
    if (conn != null) {
    this.conn.close();
    }
    } catch (Exception e) {
    e.printStackTrace();
    }

    }
    }

    第二个类:

    package dina.web.test;

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


    public class SQLExcute {

    static DBHelper db = null;
    static String sql = null;
    static ResultSet rs = null;

    public static void main(String[] args) {
    sql = "SELECT * from sys_user where USERNAME='15020151106'";
    db = new DBHelper(sql);
    try {
    rs=db.pst.executeQuery();
    while (rs.next()) {

    System.out.println("账号:"+rs.getString(3));
    System.out.println("姓名:"+rs.getString(4));
    }
    rs.close();
    db.close();

    } catch (SQLException e) {
    e.printStackTrace();
    }
    }

    }

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  • 原文地址:https://www.cnblogs.com/zoelius/p/6908705.html
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