JavaWeb用户信息管理Demo——增删查改，多条件组合查询，结果集分页处理

用户信息管理demo

演示视频：

用户信息管理系统演示视频（javaweb）

目录结构

代码

CustomerDao

package com.veeja.cstm.dao;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.apache.commons.dbutils.handlers.ScalarHandler;

import cn.itcast.jdbc.TxQueryRunner;

import com.veeja.cstm.domain.Customer;
import com.veeja.cstm.domain.PageBean;

/**
 * 持久层
 * 
 * @author Veeja.Liu
 * @emial [email protected]
 * 
 */
public class CustomerDao {
	private QueryRunner qr = new TxQueryRunner();

	/**
	 * 添加用户
	 * 
	 * @param c
	 */
	public void add(Customer c) {
		try {
			String sql = "insert t_customer values(?,?,?,?,?,?,?)";
			Object[] params = { c.getCid(), c.getCname(), c.getGender(),
					c.getBirthday(), c.getCellphone(), c.getEmail(),
					c.getDescription() };
			qr.update(sql, params);
		} catch (SQLException e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * 
	 * 查询所有
	 * 
	 * @param ps
	 * @param pc
	 * 
	 * @return
	 */
	public PageBean<Customer> findAll(int pc, int ps) {
		try {
			System.out.println("CustomerDao#findAll()启动！");
			// 1. 创建pagebean对象
			PageBean<Customer> pb = new PageBean<Customer>();
			// 设置pagebean的pc和ps，
			pb.setPc(pc);
			pb.setPs(ps);

			System.out.println("开始查询tr。");
			// 得到tr，设置给pagebean，
			String sql = "select count(*) from t_customer";
			Number number = (Number) qr.query(sql, new ScalarHandler());
			int tr = number.intValue();
			pb.setTr(tr);

			System.out.println("查询得到tr：" + tr);

			// 得到beanlist，设置给pb
			sql = "select * from t_customer order by cname limit ?,?";
			List<Customer> beanList = qr.query(sql,
					new BeanListHandler<Customer>(Customer.class), (pc - 1)
							* ps, ps);
			pb.setBeanList(beanList);
			// 返回pagebean
			System.out.println("dao马上返回一个pagebean。");
			return pb;
		} catch (SQLException e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * 根据id查询
	 * 
	 * @param cid
	 * @return
	 */
	public Customer load(String cid) {
		try {
			String sql = "select * from t_customer where cid=?";
			return qr
					.query(sql, new BeanHandler<Customer>(Customer.class), cid);
		} catch (SQLException e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * 修改客户信息
	 * 
	 * @param customer
	 */
	public void edit(Customer c) {
		try {
			String sql = "update t_customer set cname=?,gender=?,birthday=?,cellphone=?,email=?,description=? where cid=?";
			Object[] params = { c.getCname(), c.getGender(), c.getBirthday(),
					c.getCellphone(), c.getEmail(), c.getDescription(),
					c.getCid() };
			qr.update(sql, params);
		} catch (SQLException e) {
			throw new RuntimeException(e);
		}
	}

	/**
	 * 删除用户
	 * 
	 * @param cid
	 */
	public void delete(String cid) {
		try {
			String sql = "delete from t_customer where cid=?";
			qr.update(sql, cid);
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}

	// public PageBean query(Customer criteria, int pc, int ps) {
	// try {
	// System.out.println("现在执行dao的query方法。");
	// // 给出sql模板
	// // 给出一个SQL语句的前缀
	// StringBuilder sql = new StringBuilder(
	// "select * from t_customer where 1=1");
	// // 为了添加不确定的参数，我们创建一个ArrayList，用来装载参数值
	// List