一下 技术 来自我跟我的朋友 大神25号  超牛的 大神

下面创建三个工具类 一个实体类 来调用他 。。也可以自己创建数据库 通过查询 可以的

package org.lange.page.base;

import java.util.ArrayList;

import java.util.List;

import org.apache.catalina.security.SecurityUtil;

public class BasePageSO {

/**

* 当前页码

*/

private int pageNumber = 1;

/**

* 每页记录数 page size

*/

private int objectsPerPage = 50;

public BasePageSO() {

}

public int getPageNumber() {

return pageNumber;

}

public void setPageNumber(int pageNumber) {

if(pageNumber <= 0){

pageNumber = 1;

}

this.pageNumber = pageNumber;

}

public int getObjectsPerPage() {

return objectsPerPage;

}

public void setObjectsPerPage(int objectsPerPage) {

this.objectsPerPage = objectsPerPage;

}

public Integer getOffset(){

return (getPageNumber() - 1) * getObjectsPerPage();

}

public Integer getLimit(){

return getObjectsPerPage();

}

}

 以上 是 penbean 的 类

package org.lange.page.entity;

import org.lange.page.base.BasePageSO;

public class Dome1 extends BasePageSO{

private String name;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

private int age;

}

以上的是 dome1 类

package org.lange.page.javabean;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import javax.management.RuntimeErrorException;

import org.lange.page.entity.Dome1;

public class Dome2

{

private String url ="jdbc:mysql://localhost:3306/day15";

private String user="root";

private String password="root";

private int pageNumber;

private int numPerPage;

private String name;

private Long age;

public Dome2(int pageNumber, int numPerPage, String name, Long age) {

super();

this.pageNumber = pageNumber;

this.numPerPage = numPerPage;

this.name = name;

this.age = age;

}

public void queryByPage()

{ //驱动注册 程序

java.sql.Statement stmt = null;

Connection conn = null;

try {

//1:驱动注册程序

Class.forName("com.mysql.jdbc.Driver");

//获取链接对象

conn=DriverManager.getConnection(url, user, password);

//3:创建一个statement

stmt= conn.createStatement();

//4:创建sql语句

// String sql ="CREATE TABLE along(id INT PRIMARY KEY AUTO_INCREMENT,NAME VARCHAR(20),gender VARCHAR(2))";

//5:发送sql语句 得到sql语句 返回结果 返回int值

// int count = stmt.executeUpdate(sql);

//6:输出 sql 语句

// System.out.println("结果"+count+"行");

//7：不能让他一直 链接呀 那服务器内存不崩溃了么：所以要关闭它i

Dome1 d = new Dome1();

d.setPageNumber(pageNumber);

d.setObjectsPerPage(numPerPage);

int offset = d.getOffset();

int limit = d.getLimit();

String sql = "select * from chaxun where 1=1";

if(name !=null && name.length() != 0)

sql += " and name like '%" + name + "%'";

if(age != null)

sql += "and age = " + age;

sql += " limit " + offset + "," + limit;

String sqlCount = "select count(*) from chaxun where 1 = 1";

if(name !=null && name.length() != 0)

sqlCount += " and name like '%" + name + "%'";

if(age != null)

sqlCount += "and age = " + age;

System.out.println(sql);

ResultSet rs = stmt.executeQuery(sql);//

while (rs.next()) {

System.out

.println(rs.getString(1) + "\t" + rs.getString(2));//

}

} catch (Error e) {

e.printStackTrace();

throw new RuntimeErrorException(e);

} catch (ClassNotFoundException e) {

e.printStackTrace();

} catch (SQLException e) {

e.printStackTrace();

}finally{

if(stmt!=null)

try {

stmt.close();

} catch (Error e) {

e.printStackTrace();

throw new RuntimeErrorException(e);

} catch (SQLException e) {

e.printStackTrace();

}

if(conn !=null)

try {

conn.close();

} catch (Error e) {

e.printStackTrace();

throw new RuntimeErrorException(e);

} catch (SQLException e) {

e.printStackTrace();

}

}

}

以上的dome2 类 常用的工具类 用来 连 数据库的

package org.lange.page.test;

import org.junit.Test;

import org.lange.page.javabean.Dome2;

public class TestPage {

@Test

public void pageTest() {

Dome2 d = new Dome2(0,0,"李",null);

d.queryByPage();

}

 以上 是 实体类 调用上面三个方法的 

大哥 说jsp  有点难搞  就没搞  回头不上 但是 这个 直接 复制 粘贴 用就行了