分页-准备工作

drop database customers;
CREATE DATABASE IF NOT EXISTS customers;
USE customers;
CREATE TABLE t_customer(
	cid CHAR(32) PRIMARY KEY,
	cname VARCHAR(40) NOT NULL,
	gender VARCHAR(6) NOT NULL, 
	birthday CHAR(10),
	cellphone VARCHAR(15) NOT NULL,
	email VARCHAR(40),
	description VARCHAR(500)
);

<?xml version="1.0" encoding="UTF-8"?>
<c3p0-config>
	<!-- 这是默认配置信息 -->
	<default-config> 
		<!-- 连接四大参数配置 -->
		<property name="jdbcUrl">jdbc:mysql://localhost:3306/customers</property>
		<property name="driverClass">com.mysql.jdbc.Driver</property>
		<property name="user">root</property>
		<property name="password">poi</property>
		<!-- 池参数配置 -->
		<property name="acquireIncrement">3</property>
		<property name="initialPoolSize">10</property>
		<property name="minPoolSize">2</property>
		<property name="maxPoolSize">10</property>
	</default-config>
	
	<!-- 专门为oracle提供的配置信息 -->
	<named-config name="oracle-config"> 
		<property name="jdbcUrl">jdbc:mysql://localhost:3306/mydb1</property>
		<property name="driverClass">com.mysql.jdbc.Driver</property>
		<property name="user">root</property>
		<property name="password">poi</property>
		<property name="acquireIncrement">3</property>
		<property name="initialPoolSize">10</property>
		<property name="minPoolSize">2</property>
		<property name="maxPoolSize">10</property>
	</named-config>

</c3p0-config>

public class Customer {
	/*
	 * 对应数据库表
	 */
	private String cid;// 主键
	private String cname;// 客户名称
	private String gender;// 客户性别
	private String birthday;// 客户生日
	private String cellphone;// 客户手机
	private String email;// 客户邮箱
	private String description;// 客户的描述

	public String getCid() {
		return cid;
	}

	public void setCid(String cid) {
		this.cid = cid;
	}

	public String getCname() {
		return cname;
	}

	public void setCname(String cname) {
		this.cname = cname;
	}

	public String getGender() {
		return gender;
	}

	public void setGender(String gender) {
		this.gender = gender;
	}

	public String getBirthday() {
		return birthday;
	}

	public void setBirthday(String birthday) {
		this.birthday = birthday;
	}

	public String getCellphone() {
		return cellphone;
	}

	public void setCellphone(String cellphone) {
		this.cellphone = cellphone;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getDescription() {
		return description;
	}

	public void setDescription(String description) {
		this.description = description;
	}

	@Override
	public String toString() {
		return "Customer [cid=" + cid + ", cname=" + cname + ", gender="
				+ gender + ", birthday=" + birthday + ", cellphone="
				+ cellphone + ", email=" + email + ", description="
				+ description + "]";
	}
}

public class CustomerTest {
	@Test
	public void fun1() {
		CustomerDao dao = new CustomerDao();
		for(int i = 1; i <= 300; i++) {
			Customer c = new Customer();
			
			c.setCid(CommonUtils.uuid());
			c.setCname("cstm_" + i);
			c.setBirthday("2014-07-13");
			c.setGender(i%2==0?"男":"女");
			c.setCellphone("139" + i);
			c.setEmail("cstm_" + i + "@163.com");
			c.setDescription("我是客户");
			
			dao.add(c);
		}
	}
}

public class CustomerDao {
	private QueryRunner qr = new QueryRunner(new ComboPooledDataSource());

	/**
	 * 添加客户
	 * 
	 * @param c
	 */
	public void add(Customer c) {
		try {
			String sql = "insert into 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);
		}
	}
}

public class CommonUtils {
	/**
	 * 返回一个不重复的字符串
	 * @return
	 */
	public static String uuid() {
		return UUID.randomUUID().toString().replace("-", "").toUpperCase();
	}
}

public class PageBean<T> {
	private List<T> beanList;// 当前页记录数, 需要传递
	private int tr;// 总记录数, 需要传递
	private int pc;// 当前页码, 需要传递
	private int ps;// 每页记录数, 需要传递
	private int tp;// 总页数, 计算
    //其他的提供get/set方法
    //但tp只提供get方法
    public int getTp(){
        tp=tr/ps;
        return tr%ps==0?tp:tp+1;
    }
}