java_web用户的自动登录模块的实现 - JAVA

javaBean的代码

package bean;

import java.io.Serializable;

public class Admin implements Serializable{
    
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private Integer id;
    private String name;
    private String pass;

    public Admin() {
        super();
        // TODO Auto-generated constructor stub
    }

    public Admin(Integer id, String name, String pass) {
        super();
        this.id = id;
        this.name = name;
        this.pass = pass;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPass() {
        return pass;
    }

    public void setPass(String pass) {
        this.pass = pass;
    }

    @Override
    public String toString() {
        return "AdminBean [id=" + id + ", name=" + name + ", pass=" + pass
                + "]";
    }

}

dao的基础接口类

package dao;

import java.util.List;

public interface BaseDao
  
    {
    /**
     * 插入数据
     */
    boolean insert(T entity);

    /**
     * 根据实体删除数据
     */
    boolean delete(T entity);

    /**
     * 根据ID删除数据
     */
    boolean deleteById(PK id);

    /**
     * 修改数据
     */
    boolean update(T entity);

    /**
     * 查询所有数据
     */
    List
   
     findAll(); /** * 根据ID查询数据 */ T findById(PK id); /** * 根据当前页查询数据 */ List
    
      findNowPageInfo(int nowpage, int pagesize,String sortName,String sortOrder); /** * 返回总页数 */ Integer getCountPage(int pagesize); /** * 批量删除 */ boolean deletes(Object ids[]); }

对admin操作的接口类,继承自basedao

package dao;

import bean.Admin;

public interface AdminDao extends BaseDao
  
    {
    Admin checkLogin(String name,String pass);
    Admin checkLogin(String name);
    
}

dao操作实体的实现类

package daoImpl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import util.JdbcUtil;
import bean.Admin;
import dao.AdminDao;

public class AdminDaoImpl implements AdminDao {

    private Connection conn;
    private PreparedStatement pstmt;
    private ResultSet rs;

    @Override
    public boolean insert(Admin entity) {
        return JdbcUtil.upDate("insert into admin (name,pass) values ( , )",
                new Object[] { entity.getName(), entity.getPass() });
    }

    @Override
    public boolean delete(Admin entity) {
        // TODO Auto-generated method stub
        return deleteById(entity.getId());
    }

    @Override
    public boolean deleteById(Integer id) {
        // TODO Auto-generated method stub
        return JdbcUtil.upDate("delete from admin where id= ",
                new Object[] { id });
    }

    @Override
    public boolean update(Admin entity) {
        // TODO Auto-generated method stub
        return JdbcUtil.upDate(
                "update admin set name= ,pass=  where id= ",
                new Object[] { entity.getName(), entity.getPass(),
                        entity.getId() });
    }

    @Override
    public List
  
    findAll() {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public Admin findById(Integer id) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public List
   
     findNowPageInfo(int nowpage, int pagesize, String sortName, String sortOrder) { // TODO Auto-generated method stub return null; } @Override public Integer getCountPage(int pagesize) { // TODO Auto-generated method stub return null; } @Override public boolean deletes(Object[] ids) { // TODO Auto-generated method stub return false; } @Override public Admin checkLogin(String name, String pass) { // TODO Auto-generated method stub Admin entity = null; String sql = "select * from admin where name=  and pass= "; conn = JdbcUtil.getConn(); t

java_web用户的自动登录模块的实现(一)