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mysql-关于JAVAMysql的问题
2020-11-09 16:40:43 责编:小采
文档


mysqljava

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Scanner;

import util.ConnectionUtil;

/**

  • 类描述 :用户管理*/
  • public class Administrator {
    public Administrator(){
    //生成菜单
    menu();
    }

    private void menu() {
    Scanner sc = new Scanner(System.in);
    System.out.println("☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆");
    System.out.println("☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆用户菜单☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆");
    System.out.println("☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆");
    System.out.println("┌----------------------------------------------------------------------------┐");
    System.out.println("├-------------------0>新增用户 -------------------┤");
    System.out.println("├-------------------1>修改用户 -------------------┤");
    System.out.println("├-------------------2>删除用户 -------------------┤");
    System.out.println("├-------------------3>查看用户 -------------------┤");
    System.out.println("├-------------------4>返回主菜单 -------------------┤");
    System.out.println("└----------------------------------------------------------------------------┘");
    int flag = sc.nextInt();
    switch(flag){
    case 0 : addAdministrator();break; //新增
    case 1 : editAdministrator();break; //修改
    case 2 : deleteAdministrator();break; //删除
    case 3 : queryAdministrator();break; //查看
    case 4 : Login.mainMenu();break; //返回主菜单
    default: menu();break;
    }
    }

    //新增用户
    private void addAdministrator() {
    System.out.println("请输入用户的信息,格式:用户账号;用户密码;用户名称;用户电话。例如:" +
    "A0001;123456;张三;15116210083");
    try{
    Scanner sc = new Scanner(System.in);
    String msg = sc.nextLine();
    String[] msgs = msg.split(";");
    String AdminAccount = msgs[0];
    String AdminPassword = msgs[1];
    String AdminName = msgs[2];
    String AdminTel = msgs[3];

    String sql = "insert into Administrator values(?,?,?,?)";
    Connection conn = ConnectionUtil.getConnection();
    PreparedStatement sta = conn.prepareStatement(sql);
    sta.setString(1, AdminAccount);
    sta.setString(2, AdminPassword);
    sta.setString(3, AdminName);
    sta.setString(4, AdminTel);
    int rs = sta.executeUpdate();
    if(rs>0){
    System.out.println("新增用户成功!");
    }else{
    System.out.println("新增用户失败!");
    }

    System.out.println("┌----------------------------------------------------------------------------┐");
    System.out.println("├-------------------0> 查看用户列表 ------------------┤");
    System.out.println("├-------------------1> 返回上级菜单 ------------------┤");
    System.out.println("├-------------------2> 返回主菜单 ------------------┤");
    System.out.println("└----------------------------------------------------------------------------┘");

    int flag = sc.nextInt();
    switch(flag){
    case 0 : queryAdministrator();break; //查看用户列表
    case 1 : menu();break; //返回上一级菜单
    case 2 : Login.mainMenu();break; //返回主菜单
    default: menu();break;
    }
    }catch(Exception e){
    System.out.println("操作失败,请重试!");
    menu();
    }
    }

    //用户修改
    private void editAdministrator() {
    System.out.println("请输入要修改的用户账号:");
    try{
    Scanner sc = new Scanner(System.in);
    String AdminAccount = sc.nextLine();
    String sql = "select * from Administrator where AdminAccount = "+AdminAccount+"";
    Connection conn = ConnectionUtil.getConnection();
    PreparedStatement sta = conn.prepareStatement(sql);
    ResultSet rs = sta.executeQuery();
    if(rs.next()){
    System.out.println("账号:"+rs.getString(1));
    System.out.println("密码:"+rs.getString(2));
    System.out.println("姓名:"+rs.getString(3));
    System.out.println("电话:"+rs.getString(4));
    System.out.println(rs.getString(1)+"-"+rs.getString(2)+"-"+rs.getString(3)+"-"+rs.getString(4));
    System.out.println();
    System.out.println("请输入用户的信息进行修改,格式:密码-姓名-电话-账号,例如:张三-111-15116210083-A0001");
    Scanner scc = new Scanner(System.in);
    String msg = scc.nextLine();
    String[] AdminInfo = msg.split("-");
    String AdminPassword = AdminInfo[0];
    String AdminName = AdminInfo[1];
    String AdminTel = AdminInfo[2];

    String updateSql = "update Administrator set AdminPassword =?,AdminName=?,AdminTel=? where AdminAccount =?";
    PreparedStatement ps = conn.prepareStatement(updateSql);
    ps.setString(1, AdminPassword);
    ps.setString(2, AdminName);
    ps.setString(3, AdminTel);
    ps.setString(4, AdminAccount);
    int result = ps.executeUpdate();
    if(result>0){
    System.out.println("用户修改成功!");
    }else{
    System.out.println("用户修改失败!");
    }
    }else{
    System.out.println("该用户不存在!");
    }
    System.out.println("┌----------------------------------------------------------------------------┐");
    System.out.println("├-------------------0> 查看用户列表 ------------------┤");
    System.out.println("├-------------------1> 返回上级菜单 ------------------┤");
    System.out.println("├-------------------2> 返回主菜单 ------------------┤");
    System.out.println("└----------------------------------------------------------------------------┘");
    int flag = sc.nextInt();
    switch(flag){
    case 0 : queryAdministrator();break; //查看管理员列表
    case 1 : menu();break; //返回上一级菜单
    case 2 : Login.mainMenu();break; //返回主菜单
    default: menu();break;
    }
    }catch(Exception e){
    System.out.println("操作失败,请重试!");
    menu();
    }
    }

    //用户删除
    private void deleteAdministrator() {
    System.out.println("请输入用户账号进行删除!账号:");
    try{
    Scanner sc = new Scanner(System.in);
    String userId = sc.nextLine();
    System.out.println("警告:确定删除该用户?0:确定;1:取消");
    Scanner scannerTemp = new Scanner(System.in);
    int isDelete = scannerTemp.nextInt();
    if(isDelete==0){
    String sql = "delete Administrator where AdminAccount = ?";
    Connection conn = ConnectionUtil.getConnection();
    PreparedStatement sta = conn.prepareStatement(sql);
    sta.setString(1, userId);
    int rs = sta.executeUpdate();
    if(rs>0){
    System.out.println("用户删除成功!");
    }else{
    System.out.println("用户删除失败!");
    }
    }
    System.out.println("┌----------------------------------------------------------------------------┐");
    System.out.println("├-------------------0> 查看用户列表 ------------------┤");
    System.out.println("├-------------------1> 返回上级菜单 ------------------┤");
    System.out.println("├-------------------2> 返回主菜单 ------------------┤");
    System.out.println("└----------------------------------------------------------------------------┘");
    int flag = sc.nextInt();
    switch(flag){
    case 0 : queryAdministrator();break; //查看管理员列表
    case 1 : menu();break; //返回上一级菜单
    case 2 : Login.mainMenu();break; //返回主菜单
    default: menu();break;
    }
    }catch(Exception e){
    System.out.println("操作失败,请重试!");
    menu();
    }
    }

    // 用户查看
    private void queryAdministrator() {
    System.out.println("☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆");
    System.out.println("☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆用户列表☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆");
    System.out.println("☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆");
    System.out.println("┌----------------------------------------------------------------------------┐");
    try{
    String sql = "select * from Administrator";
    Connection conn = ConnectionUtil.getConnection();
    PreparedStatement sta = conn.prepareStatement(sql);
    ResultSet result = sta.executeQuery();
    while(result.next()){
    System.out.println("账号:"+result.getString(1));
    System.out.println("姓名:"+result.getString(3));
    System.out.println("密码:"+result.getString(2));
    System.out.println("电话:"+result.getString(4));
    System.out.println("├----------------------------------------------------------------------------┤");
    }
    System.out.println("├----------------------------------------------------------------------------┤");
    Scanner scanner = new Scanner(System.in);

    System.out.println("├----------------------------------------------------------------------------┤");
    System.out.println("├-------------------0>返回上级菜单 -------------------┤");
    System.out.println("├-------------------1>返回主菜单 -------------------┤");
    System.out.println("└----------------------------------------------------------------------------┘");
    int flag = scanner.nextInt();
    switch(flag){
    case 0 : menu();break; //返回上一级菜单
    case 1 : Login.mainMenu();break; //返回主菜单
    default: menu();break;
    }
    }catch(Exception e){
    System.out.println("操作失败,请重试!");
    menu();
    }
    }
    public static void main(String[] args){
    new Administrator();
    }
    }
    为什么我新增 和修改是 输入中文就会失败,输入数字 字母都没事
    这是什么地方出错了。

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