Hibernate比SQL語句簡單多了,代碼冗余少,切方便簡潔明了。下面用Hibernate+jsp+selvect+HQL來實現注冊用戶。
第一步:編寫用戶實體類和Users2.hbm.xml映射。
/* * 用戶實體類 */ public class Users2 { private int id;//用戶id private String name;//用戶昵稱 private String password;//用戶密碼 private String telephone;//用戶號碼 private String username;//用戶姓名 private String isadmin;//是否是管理員 //省略get和set方法 }
<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="entity"> <class name="Users2" table="Users2"> <id name="id"> <generator class="increment"/> </id> <property name="name" /> <property name="password" /> <property name="telephone" /> <property name="username" /> <property name="isadmin"/> </class> </hibernate-mapping>
第二步:配置hibernate.cfg.xml數據庫映射
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory name="foo"> <!-- 數據庫方言 --> <property name="dialect"> org.hibernate.dialect.OracleDialect </property> <!-- 連接數據庫Url --> <property name="hibernate.connection.url"> jdbc:oracle:thin:@localhost:1521:orcl </property> <!-- 連接驅動 --> <property name="hibernate.connection.driver_class"> oracle.jdbc.driver.OracleDriver </property> <!-- 用戶名 --> <property name="hibernate.connection.username">epet</property> <!-- 密碼 --> <property name="hibernate.connection.password">123456</property> <!-- 在控制台打印sql信息 --> <property name="show_sql">true</property> <!-- 創建表結構 --> <property name="hibernate.hbm2ddl.auto">update</property> <!-- 配置映射信息 --> <mapping resource="entity/Users2.hbm.xml" /> </session-factory> </hibernate-configuration>
第三步:編寫HibernateUtil類,dao層和daoImpl層
package com.msit.hibernate.HibernateUtil; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public class HibernateUtil { private HibernateUtil(){ }; public static SessionFactory SessionFactory = null; static{ //hibernate Configuration cf = new Configuration(); cf.configure(); SessionFactory = cf.buildSessionFactory();//DriverManager.getconnection() //Session session = SessionFactory.openSession(); } public static Session getSession(){ return SessionFactory.openSession(); } //關閉session public static void closeSession(Session session){ if(session!=null){ session.clear(); } } }
public interface UserDao { /* * 用戶注冊 */ public int addUserList(Users2 user); }
package Dao.Impl; import java.util.List; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.Transaction; import com.msit.hibernate.HibernateUtil.HibernateUtil; import entity.Users2; import Dao.UserDao; public class UserDaoImpl implements UserDao{ /* * 注冊用戶 * (non-Javadoc) * @see Dao.UserDao#addUserList(entity.Users2) */ public int addUserList(Users2 user) { Session session = HibernateUtil.getSession(); Transaction Transaction=session.beginTransaction(); try{ //對數據保存至數據庫 session.save(user); //提交事務 Transaction.commit(); return 1; }catch(Exception e){ e.printStackTrace(); //如果出現異常,事務回滾 Transaction.rollback(); return 0; }finally{ HibernateUtil.closeSession(session); } } }
創建selvect(addUser)和配置web.xml
package selvect; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import entity.Users2; import Biz.Users2Biz; import Biz.Impl.Users2BizImpl; public class addUser extends HttpServlet { /** * Constructor of the object. */ public addUser() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Users2 user=new Users2(); request.setCharacterEncoding("utf-8"); user.setName(request.getParameter("name")); user.setPassword(request.getParameter("password")); user.setTelephone(request.getParameter("telephone")); user.setUsername(request.getParameter("username")); Users2Biz biz=new Users2BizImpl(); int i=biz.addUserList(user); if(i>0){ response.sendRedirect("index.jsp"); }else{ response.sendRedirect("login.jsp"); System.out.print("cuol"); } } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } }
<?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"> <!--注冊用戶--> <servlet> <servlet-name>addUser</servlet-name> <servlet-class>selvect.addUser</servlet-class> </servlet> <!-- 映射servlet --> <servlet-mapping> <servlet-name>addUser</servlet-name> <url-pattern>/addUser</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
jsp頁面:
<%@ 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 'regs.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"> --> <LINK rel=stylesheet type=text/css href="css/style.css"> </head> <BODY> <DIV id=header class=wrap> <DIV id=logo><IMG src="images/logo.jpg" width="197px;" height="74px;"></DIV></DIV> <DIV id=regLogin class=wrap> <DIV class=dialog> <DL class=clearfix> <DT>新用戶注冊</DT> <DD class=past>填寫個人信息</DD></DL> <DIV class=box> <FORM action="addUser" method="post"> <DIV class=infos> <TABLE class=field> <TBODY> <TR> <TD class=field>用 戶 名:</TD> <TD><INPUT class=text type=text name="name"> </TD></TR> <TR> <TD class=field>密 碼:</TD> <TD><INPUT class=text type=password name="password"></TD></TR> <TR> <TD class=field>確認密碼:</TD> <TD><INPUT class=text type=password name="repassword"> </TD></TR> <TR> <TD class=field>電 話:</TD> <TD><INPUT class=text type=text name="telephone"> </TD></TR> <TR> <TD class=field>用戶姓名:</TD> <TD><INPUT class=text type=text name="username"> </TD></TR></TBODY></TABLE> <DIV class=buttons> <INPUT value=立即注冊 type="submit"> </DIV></DIV></FORM></DIV></DIV></DIV> <DIV id=footer class=wrap> <DL> <DT>趕集網 © 2010 趕集網 京ICP證1000001號</DT> <DD>關於我們 · 聯系方式 · 意見反饋 · 幫助中心</DD></DL></DIV> </BODY> </HTML>