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  • 每日日报2021.1.28

    今天完成内容:

    开发家庭小账本

    1.编写代码

    package com.edu.entity;

    import java.util.Date;

    public class User {
    private int id;
    private String username;
    private String userused;
    private String usermoney;
    private Date usedate;
    public int getId() {
    return id;
    }
    public void setId(int id) {
    this.id = id;
    }
    public String getUsername() {
    return username;
    }
    public void setUsername(String username) {
    this.username = username;
    }
    public String getUserused() {
    return userused;
    }
    public void setUserused(String userused) {
    this.userused = userused;
    }
    public String getUsermoney() {
    return usermoney;
    }
    public void setUsermoney(String usermoney) {
    this.usermoney = usermoney;
    }
    public Date getUsedate() {
    return usedate;
    }
    public void setUsedate(Date usedate) {
    this.usedate = usedate;
    }
    public User(int id, String username, String userused, String usermoney, Date usedate) {
    super();
    this.id = id;
    this.username = username;
    this.userused = userused;
    this.usermoney = usermoney;
    this.usedate = usedate;
    }
    public User() {
    }

    }

    package com.edu.entity;

    import java.sql.Connection;

    import java.sql.DriverManager;

    public class DbHelper {

    private static String url = "jdbc:mysql://localhost:3306/countuser"; // 数据库地址

    private static String userName = "root"; // 数据库用户名

    private static String passWord = "123456"; // 数据库密码

    private static Connection conn = null;

    private DbHelper() {

    }

    public static Connection getConnection() {

    if (null == conn) {

    try {

    Class.forName("com.mysql.jdbc.Driver");

    conn = DriverManager.getConnection(url, userName, passWord);

    } catch (Exception e) {

    e.printStackTrace();

    }

    }

    return conn;

    }

    public static void main(String[] args) { // 测试数据库是否连通

    System.err.println(getConnection());

    }

    }

    遇到问题:

    明日目标:

    学习Android studio的开发

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  • 原文地址:https://www.cnblogs.com/leiyu1905/p/14905609.html
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