开发第六步具体功能实现

表单：

一：

二：

项目列表

package com.demo;
import util.util;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

import Ke.Test;
public class LoginerDaolmpl {
    static Connection conn;
    static PreparedStatement ps = null;
    static ResultSet rs;
    static String sql = "select * from JiZ_user";
    static util ut= new util();
    static Scanner in = new Scanner(System.in);
    public User addUser(User user) {
         conn= ut.getConn();
         String sql="insert into JiZ_user values(?,?,?,?,?)";
         try {
             ps=conn.prepareStatement(sql);
             ps.setString(1,user.getName());
             ps.setString(2, user.getSex());
             ps.setString(3, user.getIdentity());
             ps.setString(4, user.getPhone());
             ps.setString(5, user.getPassword());
             
             int a=ps.executeUpdate();
             if(a>0) {
                 System.out.println("添加成功");
                 
             }
             else {
                 System.out.println("添加失败");
             }
         }catch(Exception e) {
             e.printStackTrace();
         }
         try {
             if(ps!=null)ps.close();
             if(conn!=null)conn.close();
         }catch(Exception e2) {
             e2.printStackTrace();
         }
         return user;
    }
    public static int uqdate(User user) {
        int b=0;
        conn=ut.getConn();
        ps=null;
        sql="update JiZ_user set Sex=?,Phone=?,Password=? where Name=?";
        try {
             ps=conn.prepareStatement(sql);
             ps.setString(1,user.getSex());
             //ps.setString(2, user.getIdentity());
             ps.setString(2,user.getPhone());
             ps.setString(3,user.getPassword());     
             ps.setString(4, user.getName());
             int a=ps.executeUpdate();
             if(a>0) {
                 b++;
                 System.out.println("修改成功");
                 
             }
             else {
                 System.out.println("修改失败");
             }
        }catch(Exception e) {
            e.printStackTrace();
        }
        try {
             if(ps!=null)ps.close();
             if(conn!=null)conn.close();
         }catch(Exception e2) {
             e2.printStackTrace();
         }
        return b;
        
    }
    public static int delete(String name) {
        int b=0;
        conn=ut.getConn();
        ps=null;
        sql="delete from JiZ_user where Name=?";
        try {
            ps=conn.prepareStatement(sql);
            ps.setString(1, name);
            int a=ps.executeUpdate();
             if(a>0) {
                 b++;
                 System.out.println("删除成功");
                 
             }
             else {
                 System.out.println("删除失败");
             }
        }catch(Exception e) {
            e.printStackTrace();
        }
        try {
             if(ps!=null)ps.close();
             if(conn!=null)conn.close();
         }catch(Exception e2) {
             e2.printStackTrace();
         }
        return b;
        
    }
    public User loadUser(String a) {
        conn=ut.getConn();
        ps=null;
        ResultSet rs=null;
        User user=null;
        sql="select * from JiZ_user where Name=?";
        try {
            ps=conn.prepareStatement(sql);
            ps.setString(1, a);
            rs=ps.executeQuery();
            if(rs.next()) {
                user=new User();
                user.setName(rs.getString("Name"));
                user.setSex(rs.getString("Sex"));
                user.setIdentity(rs.getString("Identity")) ;
                user.setPhone(rs.getString("Phone"));
                user.setPassword(rs.getString("Password"));
            }
        }catch(SQLException e) {
            e.printStackTrace();
        }finally {
            try {
                 if(ps!=null)ps.close();
                 if(conn!=null)conn.close();
             }catch(Exception e2) {
                 e2.printStackTrace();
             }
        }
        return user;
    }
    public List<User> load(){
        conn=ut.getConn();
        ps=null;
        ResultSet rs=null;
        String id;
        sql="select * from JiZ_user order by Name desc";
        List<User> users=new ArrayList<User>();
        User user=null;
        try {
            ps=conn.prepareStatement(sql);
            rs=ps.executeQuery();
            while(rs.next()) {
                user=new User();
                user.setName(rs.getString("Name"));
                user.setSex(rs.getString("Sex"));
                user.setIdentity(rs.getString("Identity")) ;
                user.setPhone(rs.getString("Phone"));
                user.setPassword(rs.getString("Password"));
                users.add(user);
            }
        }catch(SQLException e) {
            e.printStackTrace();
        }finally {
            try {
                 if(ps!=null)ps.close();
                 if(conn!=null)conn.close();
             }catch(Exception e2) {
                 e2.printStackTrace();
             }
        }
        return users;
    }
}