1.创建一个web工程
2.导入jar包
3.创建Student表
4.创建实体类
package com.entity; public class Student { private Integer sid; private String sname; private String password; private String sex; private Integer cid; public Student() { } public Student(Integer sid, String sname, String password, String sex, Integer cid) { this.sid = sid; this.sname = sname; this.password = password; this.sex = sex; this.cid = cid; } public Student(String sname, String password, String sex, Integer cid) { this.sname = sname; this.password = password; this.sex = sex; this.cid = cid; } public Integer getSid() { return sid; } public void setSid(Integer sid) { this.sid = sid; } public String getSname() { return sname; } public void setSname(String sname) { this.sname = sname; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public Integer getCid() { return cid; } public void setCid(Integer cid) { this.cid = cid; } @Override public String toString() { return "Student [cid=" + cid + ", password=" + password + ", sex="
+ sex + ", sid=" + sid + ", sname=" + sname + "]"; } }
5.配置映射文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
<hibernate-mapping>
<!--1.实体类的字段和数据库的字段一一映射 name:实体类的全名 table:对应的数据库表名,默认值为类名 -->
<class name="com.entity.Student" table="STUDENT">
<!--1.1主键配置 id:对应表中的主键 name:实体类中的属性名 type:主键属性的数据类型 column:属性名对应表的字段名,默认值为属性名-->
<id name="sid" type="java.lang.Integer" column="SID">
<!--generator:为持久化实例产生一个唯一标识-->
<generator class="sequence">
<!--数据库的序列名-->
<param name="sequence">SEQ_STUDENT</param>
</generator>
</id>
<!--1.2普通字段配置-->
<property name="sname" type="java.lang.String" column="SNAME"/>
<property name="password" type="java.lang.String" column="PASSWORD"/>
<property name="sex" type="java.lang.String" column="SEX"/>
<property name="cid" type="java.lang.Integer" column="CID"/>
</class>
</hibernate-mapping>
6.配置主配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd" >
<hibernate-configuration>
<!--通常一个session-factory节点代表一个数据库-->
<session-factory>
<!--1.配置数据库的驱动-->
<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<!--2.配置数据库的url地址-->
<property name="connection.url">jdbc:oracle:thin:@127.0.0.1:1521:orcl</property>
<!--3,配置数据库的username-->
<property name="connection.username">holly</property>
<!--4.配置数据库的密码-->
<property name="connection.password">sys</property>
<!--5.配置数据库的方言-->
<property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>
<!--6.显示sql语句-->
<property name="show_sql">true</property>
<!--7.sql语句格式化-->
<property name="format_sql">true</property>
<!--8.加载映射文件-->
<mapping resource="com/entity/Student.hbm.xml"/>
</session-factory>
</hibernate-configuration>
7.创建一个工具类
package com.util; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; /** * Hibernate打开session和关闭session的工具包 * @author Holly * */
public class Hibernate_Util { private static ThreadLocal<Session> threadLocal=new ThreadLocal<Session>(); private static Configuration configuration=null; private static SessionFactory sessionFactory=null; static{ try { configuration=new Configuration().configure("/hibernate.cfg.xml"); sessionFactory=configuration.buildSessionFactory(); } catch (HibernateException e) { System.out.println("解析xml和创建Session工厂error"); e.printStackTrace(); } } public static Session getSession(){ Session session=threadLocal.get(); if(session==null){ session=sessionFactory.openSession(); threadLocal.set(session); } return session; } public static void closeSession(){ Session session=threadLocal.get(); if(session!=null){ threadLocal.set(null); session.close(); } } }
8.创建分页实体类
package com.page; public class Page { private Integer pagesize; //页面大小
private Integer pageno; //当前页
private Integer startrow; //起始行
private Integer totalpage; //总页数
private Integer totalcount; //总条数
public Page() { } public Page(Integer pageSize, Integer pageNo, Integer totalCount) { this.pagesize = pageSize; //页面大小
this.pageno = pageNo; //当前页
this.totalcount = totalCount; //计算总条数
this.setStartrow(pageNo, pageSize); //计算起始行
this.setTotalpage(totalCount, pageSize); //计算总页数
} public Integer getPagesize() { return pagesize; } public void setPagesize(Integer pageSize) { this.pagesize = pageSize; } public Integer getPageno() { return pageno; } public void setPageno(Integer pageNo) { this.pageno = pageNo; } public Integer getStartrow() { return startrow; } /** * 计算起始行 * @param pageNo * @param pageSize */
public void setStartrow(Integer pageNo,Integer pageSize) { this.startrow = (pageNo-1)*pageSize; } public Integer getTotalpage() { return totalpage; } /** * 计算总页数 * @param totalCount * @param pageSize */
public void setTotalpage(Integer totalCount,Integer pageSize) { this.totalpage = totalCount%pageSize==0?totalCount/pageSize:totalCount/pageSize+1; } public Integer getTotalcount() { return totalcount; } public void setTotalCount(Integer totalCount) { this.totalcount = totalCount; } @Override public String toString() { return "[{\"pageno\":" + pageno + ",\"pagesize\":" + pagesize + ",\"startrow\":" + startrow + ",\"totalcount\":" + totalcount + ",\"totalpage\":" + totalpage + "}]"; } }
9.创建Dao类
package com.dao; import java.util.List; import com.entity.Student; import com.page.Page; public interface StudentDao { /** * 1.根据用户名和密码查询 * @param sname * @param password * @return
*/ Student findByNameAndPwd(String sname,String password); /** * 2.延时加载:查询所有 * @return
*/ List<Student> findAll(); /** * 3.保存 * @param stu * @return
*/
int save(Student stu); /** * 4.根据主键id查询单条 * @param sid * @return
*/ Student findById(Integer sid); /** * 5.修改 */
int update(Student stu); /** * 6.删除对象 * @param stu * @return
*/
int delete(Student stu); /** * 7.分页查询 */ List<Student> findPage(Page page); /** * 8.查询总条数 */
int getTotalCount(); }
10.实现Dao接口
package com.dao.impl; import java.util.List; import org.hibernate.HibernateException; import org.hibernate.Query; import org.hibernate.Session; import com.dao.StudentDao; import com.entity.Student; import com.page.Page; import com.util.Hibernate_Util; public class StudentDaoImpl implements StudentDao{ /** * 1.查询所有:立即加载 */
public List<Student> findAll() { //1.获取session对象
Session session=Hibernate_Util.getSession(); //2.定义hql语句
String hql="from Student"; //3.Session创建Query对象
Query query=session.createQuery(hql); //4.query对象执行操作
List<Student> it=query.list(); //5.释放资源
Hibernate_Util.closeSession(); return it; } /** * 2.根据用户名和密码查询 */
public Student findByNameAndPwd(String sname, String password) { //1.获取session对象
Session session=Hibernate_Util.getSession(); //2.定义hql语句(命名参数)
String hql="from Student where sname=:sname and password=:password"; //3.Session创建Query对象
Query query=session.createQuery(hql); //4.query对象给占位符赋值
/*query.setString("sname", sname); query.setString("password", password);*/ query.setParameter("sname", sname); query.setParameter("password", password); // query.setProperties(user); //5.执行操作(uniqueResult()查询的单行数据)
Student stu=(Student) query.uniqueResult(); //6.释放资源
Hibernate_Util.closeSession(); return stu; } /** * 根据id主键查询单条 */
public Student findById(Integer sid) { //1.获取session对象
Session session=Hibernate_Util.getSession(); //2.利用session根据主键查询
Student stu=(Student) session.get(Student.class, sid); /*3. * 因为在修改时要提前查询单条,和session关联已经变成持久化对象, * 而在修改时session执行update方法时, * 首先会查询该主键id是否存在, * 如果存在,则根据主键id修改该对象,此时对象已经处于持久化对象, * 而实际session中不能同时存在两个主键id相同的对象, * 否则会出现如下错误: * org.hibernate.NonUniqueObjectException: * a different object with the same identifier * value was already associated with the * session: [com.entity.Student#1] */ Hibernate_Util.closeSession(); // session.clear();
return stu; } /** * 删除对象 */
public int delete(Student stu) { int num=1; //1.获取session对象
Session session=Hibernate_Util.getSession(); try { //session删除操作
session.delete(stu); session.beginTransaction().commit(); } catch (HibernateException e) { num=0; // TODO Auto-generated catch block
e.printStackTrace(); }finally{ //5.释放资源
Hibernate_Util.closeSession(); } return num; } /** * 添加 */
public int save(Student stu) { int num=1; //1.获取session对象
Session session=Hibernate_Util.getSession(); //执行操作
try { session.save(stu); session.beginTransaction().commit(); } catch (HibernateException e) { num=0; e.printStackTrace(); }finally{ //5.释放资源
Hibernate_Util.closeSession(); } return num; } /** * 修改 */
public int update(Student stu) { int num=1; //1.获取session对象
Session session=Hibernate_Util.getSession(); try { //执行操作 //该对象的主键id必须存在
session.update(stu); session.beginTransaction().commit(); } catch (HibernateException e) { num=0; e.printStackTrace(); }finally{ //5.释放资源
Hibernate_Util.closeSession(); } return num; } /** * 7.分页查询 */
public List<Student> findPage(Page page) { //1.获取session
Session session=Hibernate_Util.getSession(); //2.定义查询最大记录数的hql
String hql="from Student"; //3.定义查询最大记录数的Query对象
Query querypage=session.createQuery(hql); //4.查询最大记录数的数据
querypage.setMaxResults(page.getPagesize()); //5.确定查询起点
querypage.setFirstResult(page.getStartrow()); //6.分页查询
List<Student> list=querypage.list(); //7.关闭session
Hibernate_Util.closeSession(); return list; } /** * 8.查询总条数 */
public int getTotalCount() { //1.获取session
Session session=Hibernate_Util.getSession(); //2.定义查询总条数hql语句
String hqlcount="select count(*) from Student"; //3.利用Session创建Query对象
Query querycount=session.createQuery(hqlcount); //4.获取总条数(返回单行数据uniqueResult())
Integer totalCount=Integer.parseInt(querycount.uniqueResult().toString()); //5.释放资源
Hibernate_Util.closeSession(); return totalCount; } }
11.创建业务层的接口
package com.service; import java.util.List; import com.entity.Student; import com.page.Page; /** * 业务接口 * @author pc * */
public interface StudentService { /** * 1.登录的业务 * @param sname * @param password * @return
*/ Student login(String sname,String password); /** * 2.注册 * @param stu * @return
*/
int register(Student stu); /** * 3.查询所有 */ List<Student> findAll(); /** * 4.根据主键id查询 * @param sid * @return
*/ Student findById(Integer sid); /** * 5.修改 */
int update(Student stu); /** * 6.删除 */
int delete(Student stu); /** * 7.分页查询 */ List<Student> findPage(Page page); /** * 8.查询总条数 */
int getTotalCount(); }
12.实现业务层接口
package com.service.impl; import java.util.List; import com.dao.StudentDao; import com.dao.impl.StudentDaoImpl; import com.entity.Student; import com.page.Page; import com.service.StudentService; public class StudentServiceImpl implements StudentService { /** * 使用多态引用数据访问层对象 */
private StudentDao dao = new StudentDaoImpl(); /** * 登录 */
public Student login(String sname, String password) { return dao.findByNameAndPwd(sname, password); } public int delete(Student stu) { // TODO Auto-generated method stub
return dao.delete(stu); } public List<Student> findAll() { // TODO Auto-generated method stub
return dao.findAll(); } public Student findById(Integer sid) { // TODO Auto-generated method stub
return dao.findById(sid); } public int register(Student stu) { // TODO Auto-generated method stub
return dao.save(stu); } public int update(Student stu) { // TODO Auto-generated method stub
return dao.update(stu); } public List<Student> findPage(Page page) { // TODO Auto-generated method stub
return dao.findPage(page); } public int getTotalCount() { // TODO Auto-generated method stub
return dao.getTotalCount(); } }
13.创建Servlet类
Servlet类里的增删改查我是分开写的,所以就不一一粘贴代码,这里只粘贴部分
package com.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.entity.Student; import com.service.StudentService; import com.service.impl.StudentServiceImpl; public class RegisterServlet extends HttpServlet { private static final long serialVersionUID = 1L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); // 2.接受参数
String sname = request.getParameter("sname"); String password = request.getParameter("password"); String sex = request.getParameter("sex"); Integer cid = Integer.valueOf(request.getParameter("cid")); Student stu = new Student(sname, password, sex, cid); // 3.业务处理
StudentService service = new StudentServiceImpl(); int num = service.register(stu); if (num > 0) { System.out.println("register success!"); response.sendRedirect("FindAllServlet"); } else { System.out.println("register fail!"); } } }
package com.servlet; import java.io.IOException; import java.io.PrintWriter; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.codehaus.jackson.map.ObjectMapper; import com.entity.Student; import com.page.Page; import com.service.StudentService; import com.service.impl.StudentServiceImpl; /** * 分页查询 * * @author pc * */
public class FindPageServlet extends HttpServlet { private static final long serialVersionUID = 1L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); /** * ☆ * 在使用ajax往前台通过输出流对象的print方法发送json时 * 该行获取输出流对象的代码必须放在 * response.setContentType("text/html;charset=UTF-8"); * 之后,否则ajax回调时,页面拿到的中文数据就永远都是乱码, * 原因是:如果将改行代码写在处理客户端乱码之前,表示编码格式已经确定, * 所以,编码格式的处理应该放在获取PrintWriter对象之前 * */ PrintWriter out=response.getWriter(); // 2.接受参数
String no=request.getParameter("pageNo"); // 3.业务处理
StudentService service = new StudentServiceImpl(); int pageSize=3; //页面大小
int pageNo=1; //默认的pageNo为1
if(no!=null && no!=""){ pageNo=Integer.valueOf(no); } //获取总条数
int totalCount=service.getTotalCount(); //封装分页所需字段
Page page=new Page(pageSize, pageNo, totalCount); //分页查询
List<Student> list = service.findPage(page); ObjectMapper om=new ObjectMapper(); String str=om.writeValueAsString(list); String pagestr=om.writeValueAsString(page); str="{\"page\":"+pagestr+",\"list\":"+str+"}"; System.out.println(str); out.print(str); /*if (list != null) { System.out.println("find page success"); request.setAttribute("list", list); request.setAttribute("page", page); request.getRequestDispatcher("index.jsp").forward(request, response); } else { System.out.println("find page fail!"); }*/ } }
package com.servlet; import java.io.IOException; import java.io.PrintWriter; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.entity.Student; import com.page.Page; import com.service.StudentService; import com.service.impl.StudentServiceImpl; public class FindAllServlet extends HttpServlet { private static final long serialVersionUID = 1L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); /** * ☆ * 在使用ajax往前台通过输出流对象的print方法发送json时 * 该行获取输出流对象的代码必须放在 * response.setContentType("text/html;charset=UTF-8"); * 之后,否则ajax回调时,页面拿到的中文数据就永远都是乱码, * 原因是:如果将改行代码写在处理客户端乱码之前,表示编码格式已经确定, * 所以,编码格式的处理应该放在获取PrintWriter对象之前 * */
// 2.接受参数
String no=request.getParameter("pageNo"); // 3.业务处理
StudentService service = new StudentServiceImpl(); int pageSize=3; //页面大小
int pageNo=1; //默认的pageNo为1
if(no!=null && no!=""){ pageNo=Integer.valueOf(no); } //获取总条数
int totalCount=service.getTotalCount(); Page page=new Page(pageSize, pageNo, totalCount); List<Student> list = service.findPage(page); if(list!=null){ System.out.println("find All page success"); request.setAttribute("list", list); request.setAttribute("page", page); request.getRequestDispatcher("index.jsp").forward(request, response); }else{ System.out.println("find All page fail!"); } } }
代码
package com.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.entity.Student; import com.service.StudentService; import com.service.impl.StudentServiceImpl; public class LoginServlet extends HttpServlet { private static final long serialVersionUID = 1L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); //2.接受参数
String sname=request.getParameter("sname"); String password=request.getParameter("password"); //3.业务处理
StudentService service=new StudentServiceImpl(); Student stu=service.login(sname, password); if(stu!=null){ System.out.println("login success!"); //4.页面跳转
request.getSession().setAttribute("sname", sname); response.sendRedirect("FindAllServlet"); }else{ System.out.println("login fail!"); } } }
package com.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.entity.Student; import com.service.StudentService; import com.service.impl.StudentServiceImpl; import com.util.Hibernate_Util; public class FindByIdSerlvet extends HttpServlet { private static final long serialVersionUID = 1L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); // 2.接受参数
Integer sid=Integer.valueOf(request.getParameter("sid")); // 3.业务处理
StudentService service = new StudentServiceImpl(); Student stu=service.findById(sid); System.out.println("stu:"+stu); if(stu!=null){ System.out.println("根据id查询到对象"); request.setAttribute("stu", stu); request.getRequestDispatcher("update.jsp").forward(request, response); }else{ System.out.println("没有根据id查询到对象"); } } }
package com.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.entity.Student; import com.service.StudentService; import com.service.impl.StudentServiceImpl; public class UpdateServlet extends HttpServlet { private static final long serialVersionUID = 1L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); // 2.接受参数
Integer sid=Integer.valueOf(request.getParameter("sid")); String sname = request.getParameter("sname"); String password = request.getParameter("password"); String sex = request.getParameter("sex"); Integer cid=Integer.valueOf(request.getParameter("cid")); Student stu=new Student(sid,sname, password, sex, cid); // 3.业务处理
StudentService service = new StudentServiceImpl(); int num=service.update(stu); if(num>0){ System.out.println("update success!"); response.sendRedirect("FindAllServlet"); }else{ System.out.println("update fail!"); } } }
package com.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.entity.Student; import com.service.StudentService; import com.service.impl.StudentServiceImpl; public class DeleteSerlvet extends HttpServlet { private static final long serialVersionUID = 1L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); response.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); // 2.接受参数
Integer sid=Integer.valueOf(request.getParameter("sid")); // 3.业务处理
StudentService service = new StudentServiceImpl(); Student stu=service.findById(sid); if (stu != null) { System.out.println("根据id查询成功"); int num=service.delete(stu); if(num>0){ System.out.println("delete success!!"); // 4.页面跳转
response.sendRedirect("FindAllServlet"); }else{ System.out.println("delete success!!"); } } else { System.out.println("根据id查询失败!"); } } }
14.配置web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>com.servlet.LoginServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>FindAllServlet</servlet-name>
<servlet-class>com.servlet.FindAllServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>FindByIdSerlvet</servlet-name>
<servlet-class>com.servlet.FindByIdSerlvet</servlet-class>
</servlet>
<servlet>
<servlet-name>UpdateServlet</servlet-name>
<servlet-class>com.servlet.UpdateServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>DeleteSerlvet</servlet-name>
<servlet-class>com.servlet.DeleteSerlvet</servlet-class>
</servlet>
<servlet>
<servlet-name>RegisterServlet</servlet-name>
<servlet-class>com.servlet.RegisterServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>FindPageServlet</servlet-name>
<servlet-class>com.servlet.FindPageServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/LoginServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>FindAllServlet</servlet-name>
<url-pattern>/FindAllServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>FindByIdSerlvet</servlet-name>
<url-pattern>/FindByIdSerlvet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>UpdateServlet</servlet-name>
<url-pattern>/UpdateServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>DeleteSerlvet</servlet-name>
<url-pattern>/DeleteSerlvet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>RegisterServlet</servlet-name>
<url-pattern>/RegisterServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>FindPageServlet</servlet-name>
<url-pattern>/FindPageServlet</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
</web-app>
15.首页
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<% String path = request.getContextPath(); String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort() + path + "/"; %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<CENTER>
<h3>学生信息表</h3>
<table border="2">
<tr>
<td> 序号 </td>
<td> 姓名 </td>
<td> 性别 </td>
<td align="center"> 操作 </td>
</tr>
<c:forEach var="i" items="${list}" varStatus="f">
<tr <c:if test="${f.index%2==0}">style="background-color:orange;"</c:if>>
<td> ${i.sid } </td>
<td> ${i.sname } </td>
<td> ${i.sex } </td>
<td>
<a href="register.jsp">添加</a>
<a href="FindByIdSerlvet?sid=${i.sid}">修改</a>
<a href="DeleteSerlvet?sid=${i.sid}">删除</a>
</td>
</tr>
</c:forEach>
</table>
<div> 第${page.pageno}/${page.totalpage}页 <a href="FindAllServlet?pageNo=1">首页</a>
<c:choose>
<c:when test="${page.pageno gt 1}">
<a href="FindAllServlet?pageNo=${page.pageno-1 }">上一页</a>
</c:when>
<c:otherwise>
<a href="javascript:alert('已经是第一页了,没有上一页!');">上一页</a>
</c:otherwise>
</c:choose>
<c:choose>
<c:when test="${page.pageno lt page.totalpage}">
<a href="FindAllServlet?pageNo=${page.pageno+1 }">下一页</a>
</c:when>
<c:otherwise>
<a href="javascript:alert('已经是最有一页了,没有下一页!');">下一页</a>
</c:otherwise>
</c:choose>
<a href="FindAllServlet?pageNo=${page.totalpage}">末页</a>
共${page.totalcount}条 </div>
</CENTER>
</body>
</html>
16.登录页面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<% String path = request.getContextPath(); String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort() + path + "/"; %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<center>
<fieldset style="width: 300px;">
<legend> 登录 </legend>
<form action="LoginServlet" method="post">
<table>
<tr>
<td> 用户名: </td>
<td>
<input type="text" name="sname" />
</td>
</tr>
<tr>
<td> 密码: </td>
<td>
<input type="password" name="password" />
</td>
</tr>
<tr>
<td>
<input type="submit" value="提交" />
</td>
<td>
<input type="reset" value="重置" />
</td>
</tr>
</table>
</form>
</fieldset>
</center>
</body>
</html>
17.注册页面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<% String path = request.getContextPath(); String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort() + path + "/"; %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<center>
<fieldset style="width: 500px;">
<legend> 注册 </legend>
<form action="RegisterServlet" method="post">
<table>
<tr>
<td> 用户名: </td>
<td>
<input type="text" name="sname"/>
</td>
</tr>
<tr>
<td> 密码: </td>
<td>
<input type="password" name="password"/>
</td>
</tr>
<tr>
<td> 性别: </td>
<td>
<input type="radio" name="sex" value="男" checked="checked"/>男 <input type="radio" name="sex" value="女"/>女 </td>
</tr>
<tr>
<td> 班级编号: </td>
<td>
<select name="cid">
<option value="1">TB07</option>
<option value="2">TB13</option>
<option value="3">TB24</option>
<option value="4">TB31</option>
</select>
</td>
</tr>
<tr>
<td>
<input type="submit" value="注册" />
</td>
<td>
<input type="reset" value="重置" />
</td>
</tr>
</table>
</form>
</fieldset>
</center>
</body>
</html>
18.修改
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<% String path = request.getContextPath(); String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort() + path + "/"; %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<center>
<fieldset style="width: 500px;">
<legend>
<br>修改 </legend>
<form action="UpdateServlet?sid=${stu.sid}" method="post">
<table>
<tr>
<td> 用户名: </td>
<td>
<input type="text" name="sname" value="${stu.sname}"/>
</td>
</tr>
<tr>
<td> 密码: </td>
<td>
<input type="password" name="password" value="${stu.password}"/>
</td>
</tr>
<tr>
<td> 性别: </td>
<td>
<c:choose>
<c:when test="${stu.sex eq '男'}">
<input type="radio" name="sex" value="男" checked="checked"/>男 <input type="radio" name="sex" value="女"/>女 </c:when>
<c:otherwise>
<input type="radio" name="sex" value="男"/>男 <input type="radio" name="sex" value="女" checked="checked"/>女 </c:otherwise>
</c:choose>
</td>
</tr>
<tr>
<td> 班级编号: </td>
<td>
<select name="cid">
<option value="1">TB07</option>
<option value="2">TB13</option>
<option value="3">TB24</option>
<option value="4">TB31</option>
</select>
</td>
</tr>
<tr>
<td>
<input type="submit" value="修改" />
</td>
<td>
<input type="reset" value="重置" />
</td>
</tr>
</table>
</form>
</fieldset>
</center>
</body>
</html>
部分截图 2016-09-2415:21:19
注:希望各路大神多多指点!!!